./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS --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 57ba9a4d546a973620a0029f54a814a104db676a0fd0f250dd5545a7c0f94302 --- 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-8393723 [2022-11-19 07:03:13,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:03:13,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:03:13,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:03:13,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:03:13,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:03:13,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:03:13,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:03:13,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:03:13,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:03:13,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:03:13,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:03:13,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:03:13,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:03:13,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:03:13,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:03:13,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:03:13,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:03:13,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:03:13,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:03:13,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:03:13,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:03:13,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:03:13,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:03:13,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:03:13,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:03:13,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:03:13,771 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:03:13,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:03:13,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:03:13,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:03:13,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:03:13,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:03:13,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:03:13,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:03:13,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:03:13,783 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:03:13,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:03:13,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:03:13,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:03:13,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:03:13,786 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:03:13,825 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:03:13,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:03:13,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:03:13,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:03:13,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:03:13,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:03:13,828 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:03:13,828 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:03:13,829 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:03:13,829 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:03:13,830 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:03:13,830 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:03:13,830 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:03:13,831 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:03:13,831 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:03:13,831 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:03:13,831 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:03:13,831 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:03:13,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:03:13,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:03:13,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:03:13,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:03:13,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:03:13,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:03:13,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:03:13,834 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:03:13,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:03:13,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:03:13,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:03:13,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:03:13,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:03:13,837 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:03:13,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:03:13,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:03:13,838 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:03:13,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:03:13,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:03:13,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:03:13,838 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_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57ba9a4d546a973620a0029f54a814a104db676a0fd0f250dd5545a7c0f94302 [2022-11-19 07:03:14,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:03:14,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:03:14,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:03:14,206 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:03:14,207 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:03:14,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2022-11-19 07:03:14,289 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/data/c404357f0/1ed2a8c79445481aad9a7323bd04c102/FLAG1651691ba [2022-11-19 07:03:15,147 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:03:15,148 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2022-11-19 07:03:15,228 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/data/c404357f0/1ed2a8c79445481aad9a7323bd04c102/FLAG1651691ba [2022-11-19 07:03:15,719 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/data/c404357f0/1ed2a8c79445481aad9a7323bd04c102 [2022-11-19 07:03:15,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:03:15,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:03:15,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:03:15,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:03:15,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:03:15,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:03:15" (1/1) ... [2022-11-19 07:03:15,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad8b418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:15, skipping insertion in model container [2022-11-19 07:03:15,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:03:15" (1/1) ... [2022-11-19 07:03:15,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:03:15,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:03:16,517 WARN L234 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_d38c9023-9da5-4721-a961-144d9950fc74/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i[101600,101613] [2022-11-19 07:03:16,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:03:16,771 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:03:16,882 WARN L234 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_d38c9023-9da5-4721-a961-144d9950fc74/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i[101600,101613] [2022-11-19 07:03:17,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:03:17,071 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:03:17,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:17 WrapperNode [2022-11-19 07:03:17,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:03:17,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:03:17,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:03:17,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:03:17,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:17" (1/1) ... [2022-11-19 07:03:17,186 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:17" (1/1) ... [2022-11-19 07:03:17,266 INFO L138 Inliner]: procedures = 113, calls = 441, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1251 [2022-11-19 07:03:17,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:03:17,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:03:17,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:03:17,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:03:17,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:17" (1/1) ... [2022-11-19 07:03:17,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:17" (1/1) ... [2022-11-19 07:03:17,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:17" (1/1) ... [2022-11-19 07:03:17,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:17" (1/1) ... [2022-11-19 07:03:17,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:17" (1/1) ... [2022-11-19 07:03:17,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:17" (1/1) ... [2022-11-19 07:03:17,405 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:17" (1/1) ... [2022-11-19 07:03:17,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:17" (1/1) ... [2022-11-19 07:03:17,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:03:17,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:03:17,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:03:17,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:03:17,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:17" (1/1) ... [2022-11-19 07:03:17,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:03:17,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:17,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:03:17,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:03:17,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 07:03:17,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 07:03:17,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 07:03:17,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 07:03:17,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 07:03:17,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:03:17,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 07:03:17,543 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 07:03:17,543 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-19 07:03:17,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-19 07:03:17,544 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:03:17,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:03:17,544 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 07:03:17,544 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 07:03:17,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:03:17,545 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-19 07:03:17,545 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-19 07:03:17,545 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 07:03:17,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 07:03:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 07:03:17,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 07:03:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:03:17,546 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:03:17,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:03:17,547 INFO L130 BoogieDeclarations]: Found specification of procedure idmouse_resume [2022-11-19 07:03:17,547 INFO L138 BoogieDeclarations]: Found implementation of procedure idmouse_resume [2022-11-19 07:03:17,547 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-19 07:03:17,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-19 07:03:17,547 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_2 [2022-11-19 07:03:17,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_2 [2022-11-19 07:03:17,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:03:17,548 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-19 07:03:17,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-19 07:03:17,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:03:17,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:03:17,549 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-19 07:03:17,549 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_5 [2022-11-19 07:03:17,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_5 [2022-11-19 07:03:17,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:03:17,550 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-11-19 07:03:17,550 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-11-19 07:03:17,550 INFO L130 BoogieDeclarations]: Found specification of procedure idmouse_disconnect [2022-11-19 07:03:17,550 INFO L138 BoogieDeclarations]: Found implementation of procedure idmouse_disconnect [2022-11-19 07:03:17,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:03:17,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:03:17,551 INFO L130 BoogieDeclarations]: Found specification of procedure idmouse_delete [2022-11-19 07:03:17,551 INFO L138 BoogieDeclarations]: Found implementation of procedure idmouse_delete [2022-11-19 07:03:17,551 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 07:03:17,552 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 07:03:17,552 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-19 07:03:17,552 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-19 07:03:17,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:03:17,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 07:03:17,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-19 07:03:17,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-19 07:03:17,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:03:17,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:03:17,992 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:03:17,995 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:03:18,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 07:03:18,293 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-19 07:03:19,444 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:03:19,804 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:03:19,804 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:03:19,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:03:19 BoogieIcfgContainer [2022-11-19 07:03:19,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:03:19,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:03:19,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:03:19,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:03:19,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:03:15" (1/3) ... [2022-11-19 07:03:19,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1d34d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:03:19, skipping insertion in model container [2022-11-19 07:03:19,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:03:17" (2/3) ... [2022-11-19 07:03:19,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1d34d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:03:19, skipping insertion in model container [2022-11-19 07:03:19,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:03:19" (3/3) ... [2022-11-19 07:03:19,824 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--usb--misc--idmouse.ko-entry_point.cil.out.i [2022-11-19 07:03:19,853 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:03:19,854 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:03:19,971 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:03:19,978 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;@17ff9f6a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:03:19,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:03:19,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 276 states, 174 states have (on average 1.4482758620689655) internal successors, (252), 189 states have internal predecessors, (252), 82 states have call successors, (82), 20 states have call predecessors, (82), 18 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) [2022-11-19 07:03:19,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:03:19,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:19,999 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:20,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:20,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:20,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1559803666, now seen corresponding path program 1 times [2022-11-19 07:03:20,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:20,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478533506] [2022-11-19 07:03:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:20,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:03:20,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:20,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478533506] [2022-11-19 07:03:20,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478533506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:20,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:20,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:20,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671107953] [2022-11-19 07:03:20,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:20,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:20,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:20,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:20,655 INFO L87 Difference]: Start difference. First operand has 276 states, 174 states have (on average 1.4482758620689655) internal successors, (252), 189 states have internal predecessors, (252), 82 states have call successors, (82), 20 states have call predecessors, (82), 18 states have return successors, (76), 74 states have call predecessors, (76), 76 states have call successors, (76) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:03:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:21,284 INFO L93 Difference]: Finished difference Result 790 states and 1173 transitions. [2022-11-19 07:03:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:03:21,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-11-19 07:03:21,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:21,321 INFO L225 Difference]: With dead ends: 790 [2022-11-19 07:03:21,325 INFO L226 Difference]: Without dead ends: 504 [2022-11-19 07:03:21,336 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 [2022-11-19 07:03:21,349 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 358 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:21,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 767 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:03:21,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-19 07:03:21,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 501. [2022-11-19 07:03:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 326 states have (on average 1.401840490797546) internal successors, (457), 335 states have internal predecessors, (457), 140 states have call successors, (140), 35 states have call predecessors, (140), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-19 07:03:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 731 transitions. [2022-11-19 07:03:21,486 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 731 transitions. Word has length 30 [2022-11-19 07:03:21,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:21,487 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 731 transitions. [2022-11-19 07:03:21,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:03:21,487 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 731 transitions. [2022-11-19 07:03:21,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 07:03:21,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:21,491 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:21,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:03:21,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:21,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:21,492 INFO L85 PathProgramCache]: Analyzing trace with hash 52553193, now seen corresponding path program 1 times [2022-11-19 07:03:21,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:21,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103892326] [2022-11-19 07:03:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:21,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:22,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:22,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103892326] [2022-11-19 07:03:22,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103892326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:22,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:22,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:22,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485686596] [2022-11-19 07:03:22,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:22,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:22,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:22,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:22,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:22,011 INFO L87 Difference]: Start difference. First operand 501 states and 731 transitions. 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:03:22,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:22,250 INFO L93 Difference]: Finished difference Result 503 states and 732 transitions. [2022-11-19 07:03:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:03:22,251 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-11-19 07:03:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:22,256 INFO L225 Difference]: With dead ends: 503 [2022-11-19 07:03:22,258 INFO L226 Difference]: Without dead ends: 500 [2022-11-19 07:03:22,259 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 [2022-11-19 07:03:22,265 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 365 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:22,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 336 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:03:22,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-11-19 07:03:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2022-11-19 07:03:22,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 326 states have (on average 1.3987730061349692) internal successors, (456), 334 states have internal predecessors, (456), 139 states have call successors, (139), 35 states have call predecessors, (139), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-19 07:03:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 729 transitions. [2022-11-19 07:03:22,374 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 729 transitions. Word has length 39 [2022-11-19 07:03:22,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:22,374 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 729 transitions. [2022-11-19 07:03:22,375 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:03:22,375 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 729 transitions. [2022-11-19 07:03:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 07:03:22,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:22,387 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:22,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:03:22,388 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:22,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:22,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1628939930, now seen corresponding path program 1 times [2022-11-19 07:03:22,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:22,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055298815] [2022-11-19 07:03:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:22,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:22,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:22,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055298815] [2022-11-19 07:03:22,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055298815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:22,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:22,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:22,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532134314] [2022-11-19 07:03:22,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:22,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:22,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:22,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:22,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:22,785 INFO L87 Difference]: Start difference. First operand 500 states and 729 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:03:23,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:23,027 INFO L93 Difference]: Finished difference Result 502 states and 730 transitions. [2022-11-19 07:03:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:03:23,028 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-11-19 07:03:23,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:23,037 INFO L225 Difference]: With dead ends: 502 [2022-11-19 07:03:23,037 INFO L226 Difference]: Without dead ends: 499 [2022-11-19 07:03:23,039 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 [2022-11-19 07:03:23,044 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 362 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:23,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 334 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:03:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-19 07:03:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2022-11-19 07:03:23,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 326 states have (on average 1.3957055214723926) internal successors, (455), 333 states have internal predecessors, (455), 138 states have call successors, (138), 35 states have call predecessors, (138), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-19 07:03:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 727 transitions. [2022-11-19 07:03:23,154 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 727 transitions. Word has length 40 [2022-11-19 07:03:23,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:23,157 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 727 transitions. [2022-11-19 07:03:23,158 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:03:23,158 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 727 transitions. [2022-11-19 07:03:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:03:23,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:23,167 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:23,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:03:23,172 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:23,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:23,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1042673908, now seen corresponding path program 1 times [2022-11-19 07:03:23,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:23,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125358513] [2022-11-19 07:03:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:23,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:23,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:23,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125358513] [2022-11-19 07:03:23,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125358513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:23,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:23,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:23,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728960061] [2022-11-19 07:03:23,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:23,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:23,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:23,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:23,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:23,411 INFO L87 Difference]: Start difference. First operand 499 states and 727 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:03:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:23,639 INFO L93 Difference]: Finished difference Result 501 states and 728 transitions. [2022-11-19 07:03:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:03:23,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-11-19 07:03:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:23,644 INFO L225 Difference]: With dead ends: 501 [2022-11-19 07:03:23,645 INFO L226 Difference]: Without dead ends: 498 [2022-11-19 07:03:23,646 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 [2022-11-19 07:03:23,650 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 359 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:23,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 332 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:03:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-19 07:03:23,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2022-11-19 07:03:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 326 states have (on average 1.392638036809816) internal successors, (454), 332 states have internal predecessors, (454), 137 states have call successors, (137), 35 states have call predecessors, (137), 34 states have return successors, (134), 130 states have call predecessors, (134), 134 states have call successors, (134) [2022-11-19 07:03:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 725 transitions. [2022-11-19 07:03:23,722 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 725 transitions. Word has length 41 [2022-11-19 07:03:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:23,722 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 725 transitions. [2022-11-19 07:03:23,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:03:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 725 transitions. [2022-11-19 07:03:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 07:03:23,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:23,724 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:23,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:03:23,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:23,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2036647901, now seen corresponding path program 1 times [2022-11-19 07:03:23,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:23,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442620882] [2022-11-19 07:03:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:23,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:23,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:23,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442620882] [2022-11-19 07:03:23,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442620882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:23,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:23,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:23,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176313235] [2022-11-19 07:03:23,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:23,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:23,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:23,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:23,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:23,930 INFO L87 Difference]: Start difference. First operand 498 states and 725 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:03:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:24,297 INFO L93 Difference]: Finished difference Result 849 states and 1230 transitions. [2022-11-19 07:03:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:03:24,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-11-19 07:03:24,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:24,305 INFO L225 Difference]: With dead ends: 849 [2022-11-19 07:03:24,306 INFO L226 Difference]: Without dead ends: 846 [2022-11-19 07:03:24,307 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 [2022-11-19 07:03:24,308 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 251 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:24,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 699 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:03:24,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-19 07:03:24,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 832. [2022-11-19 07:03:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 545 states have (on average 1.3963302752293578) internal successors, (761), 555 states have internal predecessors, (761), 228 states have call successors, (228), 59 states have call predecessors, (228), 58 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-11-19 07:03:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1214 transitions. [2022-11-19 07:03:24,428 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1214 transitions. Word has length 42 [2022-11-19 07:03:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:24,429 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 1214 transitions. [2022-11-19 07:03:24,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:03:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1214 transitions. [2022-11-19 07:03:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 07:03:24,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:24,431 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:24,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:03:24,432 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:24,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:24,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1288618961, now seen corresponding path program 1 times [2022-11-19 07:03:24,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:24,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723449907] [2022-11-19 07:03:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:24,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:03:24,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:24,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723449907] [2022-11-19 07:03:24,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723449907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:24,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:24,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:24,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508362502] [2022-11-19 07:03:24,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:24,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:24,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:24,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:24,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:24,591 INFO L87 Difference]: Start difference. First operand 832 states and 1214 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:03:24,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:24,779 INFO L93 Difference]: Finished difference Result 834 states and 1215 transitions. [2022-11-19 07:03:24,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:03:24,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-11-19 07:03:24,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:24,784 INFO L225 Difference]: With dead ends: 834 [2022-11-19 07:03:24,785 INFO L226 Difference]: Without dead ends: 825 [2022-11-19 07:03:24,785 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 [2022-11-19 07:03:24,787 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 355 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:24,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 331 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:03:24,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-11-19 07:03:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 825. [2022-11-19 07:03:24,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 539 states have (on average 1.3933209647495362) internal successors, (751), 548 states have internal predecessors, (751), 227 states have call successors, (227), 59 states have call predecessors, (227), 58 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-11-19 07:03:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1203 transitions. [2022-11-19 07:03:24,872 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1203 transitions. Word has length 43 [2022-11-19 07:03:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:24,873 INFO L495 AbstractCegarLoop]: Abstraction has 825 states and 1203 transitions. [2022-11-19 07:03:24,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:03:24,873 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1203 transitions. [2022-11-19 07:03:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:03:24,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:24,879 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:24,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:03:24,879 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash 185829655, now seen corresponding path program 1 times [2022-11-19 07:03:24,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:24,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636300900] [2022-11-19 07:03:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:24,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 07:03:25,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:25,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636300900] [2022-11-19 07:03:25,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636300900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:25,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:25,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:25,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560783405] [2022-11-19 07:03:25,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:25,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:25,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:25,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:25,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:25,009 INFO L87 Difference]: Start difference. First operand 825 states and 1203 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 07:03:25,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:25,294 INFO L93 Difference]: Finished difference Result 2096 states and 3016 transitions. [2022-11-19 07:03:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:03:25,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 87 [2022-11-19 07:03:25,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:25,321 INFO L225 Difference]: With dead ends: 2096 [2022-11-19 07:03:25,321 INFO L226 Difference]: Without dead ends: 1279 [2022-11-19 07:03:25,325 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 [2022-11-19 07:03:25,327 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 172 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:25,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 676 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:03:25,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-11-19 07:03:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1271. [2022-11-19 07:03:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 837 states have (on average 1.3859020310633214) internal successors, (1160), 850 states have internal predecessors, (1160), 328 states have call successors, (328), 106 states have call predecessors, (328), 105 states have return successors, (326), 314 states have call predecessors, (326), 326 states have call successors, (326) [2022-11-19 07:03:25,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1814 transitions. [2022-11-19 07:03:25,442 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1814 transitions. Word has length 87 [2022-11-19 07:03:25,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:25,443 INFO L495 AbstractCegarLoop]: Abstraction has 1271 states and 1814 transitions. [2022-11-19 07:03:25,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 07:03:25,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1814 transitions. [2022-11-19 07:03:25,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-19 07:03:25,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:25,447 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:25,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:03:25,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:25,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:25,448 INFO L85 PathProgramCache]: Analyzing trace with hash 673434927, now seen corresponding path program 1 times [2022-11-19 07:03:25,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:25,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185745010] [2022-11-19 07:03:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:25,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 07:03:26,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:26,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185745010] [2022-11-19 07:03:26,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185745010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:26,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:26,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:03:26,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254170294] [2022-11-19 07:03:26,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:26,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:03:26,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:26,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:03:26,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:03:26,064 INFO L87 Difference]: Start difference. First operand 1271 states and 1814 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:03:26,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:26,605 INFO L93 Difference]: Finished difference Result 3208 states and 4714 transitions. [2022-11-19 07:03:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:03:26,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2022-11-19 07:03:26,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:26,616 INFO L225 Difference]: With dead ends: 3208 [2022-11-19 07:03:26,617 INFO L226 Difference]: Without dead ends: 1951 [2022-11-19 07:03:26,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:03:26,622 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 121 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:26,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1808 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:03:26,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2022-11-19 07:03:26,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1287. [2022-11-19 07:03:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 849 states have (on average 1.380447585394582) internal successors, (1172), 862 states have internal predecessors, (1172), 328 states have call successors, (328), 106 states have call predecessors, (328), 109 states have return successors, (338), 318 states have call predecessors, (338), 326 states have call successors, (338) [2022-11-19 07:03:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1838 transitions. [2022-11-19 07:03:26,788 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1838 transitions. Word has length 105 [2022-11-19 07:03:26,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:26,789 INFO L495 AbstractCegarLoop]: Abstraction has 1287 states and 1838 transitions. [2022-11-19 07:03:26,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:03:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1838 transitions. [2022-11-19 07:03:26,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:03:26,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:26,798 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:26,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:03:26,799 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:26,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:26,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1522578336, now seen corresponding path program 1 times [2022-11-19 07:03:26,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:26,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971183723] [2022-11-19 07:03:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:26,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-19 07:03:27,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:27,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971183723] [2022-11-19 07:03:27,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971183723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:27,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:27,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:03:27,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146416248] [2022-11-19 07:03:27,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:27,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:03:27,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:27,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:03:27,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:03:27,555 INFO L87 Difference]: Start difference. First operand 1287 states and 1838 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 07:03:28,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:28,592 INFO L93 Difference]: Finished difference Result 3653 states and 5341 transitions. [2022-11-19 07:03:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:03:28,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 109 [2022-11-19 07:03:28,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:28,604 INFO L225 Difference]: With dead ends: 3653 [2022-11-19 07:03:28,604 INFO L226 Difference]: Without dead ends: 2380 [2022-11-19 07:03:28,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:03:28,609 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 421 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 2333 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:28,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 2333 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:03:28,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2022-11-19 07:03:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1748. [2022-11-19 07:03:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1172 states have (on average 1.3839590443686007) internal successors, (1622), 1195 states have internal predecessors, (1622), 427 states have call successors, (427), 147 states have call predecessors, (427), 148 states have return successors, (443), 405 states have call predecessors, (443), 425 states have call successors, (443) [2022-11-19 07:03:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2492 transitions. [2022-11-19 07:03:28,838 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2492 transitions. Word has length 109 [2022-11-19 07:03:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:28,839 INFO L495 AbstractCegarLoop]: Abstraction has 1748 states and 2492 transitions. [2022-11-19 07:03:28,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-19 07:03:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2492 transitions. [2022-11-19 07:03:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:03:28,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:28,845 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:28,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:03:28,846 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:28,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1880436643, now seen corresponding path program 1 times [2022-11-19 07:03:28,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:28,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329748760] [2022-11-19 07:03:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:28,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-19 07:03:29,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:29,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329748760] [2022-11-19 07:03:29,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329748760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:29,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:29,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:29,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136455980] [2022-11-19 07:03:29,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:29,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:29,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:29,023 INFO L87 Difference]: Start difference. First operand 1748 states and 2492 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-19 07:03:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:29,581 INFO L93 Difference]: Finished difference Result 4453 states and 6376 transitions. [2022-11-19 07:03:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:03:29,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 143 [2022-11-19 07:03:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:29,595 INFO L225 Difference]: With dead ends: 4453 [2022-11-19 07:03:29,596 INFO L226 Difference]: Without dead ends: 2719 [2022-11-19 07:03:29,601 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 [2022-11-19 07:03:29,603 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 305 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:29,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 778 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:03:29,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2022-11-19 07:03:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2704. [2022-11-19 07:03:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2704 states, 1879 states have (on average 1.379989356040447) internal successors, (2593), 1908 states have internal predecessors, (2593), 601 states have call successors, (601), 216 states have call predecessors, (601), 223 states have return successors, (623), 579 states have call predecessors, (623), 599 states have call successors, (623) [2022-11-19 07:03:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3817 transitions. [2022-11-19 07:03:29,916 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3817 transitions. Word has length 143 [2022-11-19 07:03:29,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:29,917 INFO L495 AbstractCegarLoop]: Abstraction has 2704 states and 3817 transitions. [2022-11-19 07:03:29,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-19 07:03:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3817 transitions. [2022-11-19 07:03:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:03:29,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:29,926 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:29,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:03:29,926 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:29,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:29,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1214239229, now seen corresponding path program 2 times [2022-11-19 07:03:29,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:29,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660153472] [2022-11-19 07:03:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:29,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-19 07:03:30,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:30,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660153472] [2022-11-19 07:03:30,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660153472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:30,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:30,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:30,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066330404] [2022-11-19 07:03:30,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:30,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:30,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:30,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:30,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:30,057 INFO L87 Difference]: Start difference. First operand 2704 states and 3817 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-19 07:03:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:30,584 INFO L93 Difference]: Finished difference Result 6169 states and 8720 transitions. [2022-11-19 07:03:30,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:03:30,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 143 [2022-11-19 07:03:30,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:30,600 INFO L225 Difference]: With dead ends: 6169 [2022-11-19 07:03:30,601 INFO L226 Difference]: Without dead ends: 3481 [2022-11-19 07:03:30,607 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 [2022-11-19 07:03:30,608 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 255 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:30,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 739 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:03:30,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2022-11-19 07:03:30,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 3466. [2022-11-19 07:03:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3466 states, 2417 states have (on average 1.3798096814232519) internal successors, (3335), 2452 states have internal predecessors, (3335), 767 states have call successors, (767), 268 states have call predecessors, (767), 281 states have return successors, (795), 745 states have call predecessors, (795), 765 states have call successors, (795) [2022-11-19 07:03:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3466 states to 3466 states and 4897 transitions. [2022-11-19 07:03:31,007 INFO L78 Accepts]: Start accepts. Automaton has 3466 states and 4897 transitions. Word has length 143 [2022-11-19 07:03:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:31,007 INFO L495 AbstractCegarLoop]: Abstraction has 3466 states and 4897 transitions. [2022-11-19 07:03:31,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-19 07:03:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3466 states and 4897 transitions. [2022-11-19 07:03:31,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 07:03:31,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:31,016 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:31,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:03:31,016 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:31,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1288017192, now seen corresponding path program 1 times [2022-11-19 07:03:31,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:31,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485462360] [2022-11-19 07:03:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-19 07:03:31,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:31,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485462360] [2022-11-19 07:03:31,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485462360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:31,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662203686] [2022-11-19 07:03:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:31,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:31,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:31,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:31,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:03:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:32,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:03:32,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-19 07:03:32,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:32,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662203686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:32,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:32,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-19 07:03:32,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649086592] [2022-11-19 07:03:32,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:32,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:03:32,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:32,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:03:32,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:03:32,849 INFO L87 Difference]: Start difference. First operand 3466 states and 4897 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-19 07:03:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:34,280 INFO L93 Difference]: Finished difference Result 6146 states and 8951 transitions. [2022-11-19 07:03:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:03:34,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 143 [2022-11-19 07:03:34,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:34,316 INFO L225 Difference]: With dead ends: 6146 [2022-11-19 07:03:34,316 INFO L226 Difference]: Without dead ends: 6133 [2022-11-19 07:03:34,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:03:34,321 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 354 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:34,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 1063 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:03:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6133 states. [2022-11-19 07:03:34,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6133 to 4553. [2022-11-19 07:03:34,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 3170 states have (on average 1.3769716088328077) internal successors, (4365), 3215 states have internal predecessors, (4365), 1006 states have call successors, (1006), 357 states have call predecessors, (1006), 376 states have return successors, (1044), 980 states have call predecessors, (1044), 1004 states have call successors, (1044) [2022-11-19 07:03:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6415 transitions. [2022-11-19 07:03:34,960 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6415 transitions. Word has length 143 [2022-11-19 07:03:34,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:34,960 INFO L495 AbstractCegarLoop]: Abstraction has 4553 states and 6415 transitions. [2022-11-19 07:03:34,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-19 07:03:34,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6415 transitions. [2022-11-19 07:03:34,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-19 07:03:34,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:34,974 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:34,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:35,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:35,185 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:35,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1081268659, now seen corresponding path program 1 times [2022-11-19 07:03:35,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:35,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465163540] [2022-11-19 07:03:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:35,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-19 07:03:35,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:35,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465163540] [2022-11-19 07:03:35,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465163540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:35,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:35,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:03:35,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158570410] [2022-11-19 07:03:35,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:35,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:03:35,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:03:35,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:03:35,479 INFO L87 Difference]: Start difference. First operand 4553 states and 6415 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-19 07:03:36,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:36,717 INFO L93 Difference]: Finished difference Result 9380 states and 13828 transitions. [2022-11-19 07:03:36,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:03:36,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) Word has length 158 [2022-11-19 07:03:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:36,783 INFO L225 Difference]: With dead ends: 9380 [2022-11-19 07:03:36,785 INFO L226 Difference]: Without dead ends: 7876 [2022-11-19 07:03:36,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:03:36,794 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 423 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:36,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1682 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:03:36,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2022-11-19 07:03:37,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 4565. [2022-11-19 07:03:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 3182 states have (on average 1.3755499685732244) internal successors, (4377), 3227 states have internal predecessors, (4377), 1006 states have call successors, (1006), 357 states have call predecessors, (1006), 376 states have return successors, (1044), 980 states have call predecessors, (1044), 1004 states have call successors, (1044) [2022-11-19 07:03:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 6427 transitions. [2022-11-19 07:03:37,576 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 6427 transitions. Word has length 158 [2022-11-19 07:03:37,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:37,577 INFO L495 AbstractCegarLoop]: Abstraction has 4565 states and 6427 transitions. [2022-11-19 07:03:37,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 1 states have call predecessors, (22), 1 states have call successors, (22) [2022-11-19 07:03:37,577 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 6427 transitions. [2022-11-19 07:03:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-19 07:03:37,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:37,591 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:37,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:03:37,591 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:37,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:37,592 INFO L85 PathProgramCache]: Analyzing trace with hash 746211536, now seen corresponding path program 1 times [2022-11-19 07:03:37,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:37,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768017794] [2022-11-19 07:03:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:37,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-19 07:03:37,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768017794] [2022-11-19 07:03:37,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768017794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:37,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:37,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:03:37,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280018094] [2022-11-19 07:03:37,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:37,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:03:37,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:37,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:03:37,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:03:37,930 INFO L87 Difference]: Start difference. First operand 4565 states and 6427 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 07:03:39,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:39,712 INFO L93 Difference]: Finished difference Result 10888 states and 16208 transitions. [2022-11-19 07:03:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:03:39,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 162 [2022-11-19 07:03:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:39,746 INFO L225 Difference]: With dead ends: 10888 [2022-11-19 07:03:39,746 INFO L226 Difference]: Without dead ends: 9372 [2022-11-19 07:03:39,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:03:39,753 INFO L413 NwaCegarLoop]: 719 mSDtfsCounter, 960 mSDsluCounter, 1727 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:39,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 2446 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:03:39,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2022-11-19 07:03:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 4631. [2022-11-19 07:03:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 3230 states have (on average 1.3773993808049536) internal successors, (4449), 3275 states have internal predecessors, (4449), 1024 states have call successors, (1024), 357 states have call predecessors, (1024), 376 states have return successors, (1062), 998 states have call predecessors, (1062), 1022 states have call successors, (1062) [2022-11-19 07:03:40,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 6535 transitions. [2022-11-19 07:03:40,364 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 6535 transitions. Word has length 162 [2022-11-19 07:03:40,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:40,365 INFO L495 AbstractCegarLoop]: Abstraction has 4631 states and 6535 transitions. [2022-11-19 07:03:40,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 07:03:40,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 6535 transitions. [2022-11-19 07:03:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-19 07:03:40,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:40,379 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:40,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:03:40,379 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:40,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1823121226, now seen corresponding path program 1 times [2022-11-19 07:03:40,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:40,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791852933] [2022-11-19 07:03:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-19 07:03:41,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:41,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791852933] [2022-11-19 07:03:41,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791852933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:41,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116497554] [2022-11-19 07:03:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:41,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:41,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:41,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:41,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:03:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:41,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:03:41,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-19 07:03:42,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:42,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116497554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:42,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:42,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-19 07:03:42,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580383726] [2022-11-19 07:03:42,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:42,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:03:42,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:42,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:03:42,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:03:42,211 INFO L87 Difference]: Start difference. First operand 4631 states and 6535 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 07:03:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:43,433 INFO L93 Difference]: Finished difference Result 6201 states and 8778 transitions. [2022-11-19 07:03:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:03:43,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 173 [2022-11-19 07:03:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:43,454 INFO L225 Difference]: With dead ends: 6201 [2022-11-19 07:03:43,455 INFO L226 Difference]: Without dead ends: 4619 [2022-11-19 07:03:43,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:03:43,464 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 365 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:43,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 587 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:03:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4619 states. [2022-11-19 07:03:44,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4619 to 4619. [2022-11-19 07:03:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4619 states, 3224 states have (on average 1.376240694789082) internal successors, (4437), 3269 states have internal predecessors, (4437), 1018 states have call successors, (1018), 357 states have call predecessors, (1018), 376 states have return successors, (1056), 992 states have call predecessors, (1056), 1016 states have call successors, (1056) [2022-11-19 07:03:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4619 states to 4619 states and 6511 transitions. [2022-11-19 07:03:44,202 INFO L78 Accepts]: Start accepts. Automaton has 4619 states and 6511 transitions. Word has length 173 [2022-11-19 07:03:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:44,203 INFO L495 AbstractCegarLoop]: Abstraction has 4619 states and 6511 transitions. [2022-11-19 07:03:44,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-19 07:03:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 4619 states and 6511 transitions. [2022-11-19 07:03:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-19 07:03:44,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:44,216 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:44,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:44,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:03:44,425 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:44,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:44,426 INFO L85 PathProgramCache]: Analyzing trace with hash 652289350, now seen corresponding path program 1 times [2022-11-19 07:03:44,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:44,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121139309] [2022-11-19 07:03:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:44,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-19 07:03:45,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:45,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121139309] [2022-11-19 07:03:45,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121139309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:45,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039450248] [2022-11-19 07:03:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:45,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:45,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:45,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:45,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:03:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:45,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1948 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:03:45,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-19 07:03:46,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:46,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039450248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:46,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:46,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-11-19 07:03:46,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264775904] [2022-11-19 07:03:46,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:46,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:03:46,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:03:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:03:46,021 INFO L87 Difference]: Start difference. First operand 4619 states and 6511 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-11-19 07:03:53,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:53,514 INFO L93 Difference]: Finished difference Result 28414 states and 42746 transitions. [2022-11-19 07:03:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:03:53,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 173 [2022-11-19 07:03:53,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:53,645 INFO L225 Difference]: With dead ends: 28414 [2022-11-19 07:03:53,645 INFO L226 Difference]: Without dead ends: 28406 [2022-11-19 07:03:53,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:03:53,655 INFO L413 NwaCegarLoop]: 1064 mSDtfsCounter, 2170 mSDsluCounter, 3039 mSDsCounter, 0 mSdLazyCounter, 3385 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2277 SdHoareTripleChecker+Valid, 4103 SdHoareTripleChecker+Invalid, 4036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 3385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:53,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2277 Valid, 4103 Invalid, 4036 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [651 Valid, 3385 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-19 07:03:53,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28406 states. [2022-11-19 07:03:55,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28406 to 12508. [2022-11-19 07:03:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12508 states, 8763 states have (on average 1.3847997261211913) internal successors, (12135), 8932 states have internal predecessors, (12135), 2757 states have call successors, (2757), 928 states have call predecessors, (2757), 987 states have return successors, (2865), 2647 states have call predecessors, (2865), 2755 states have call successors, (2865) [2022-11-19 07:03:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12508 states to 12508 states and 17757 transitions. [2022-11-19 07:03:55,307 INFO L78 Accepts]: Start accepts. Automaton has 12508 states and 17757 transitions. Word has length 173 [2022-11-19 07:03:55,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:55,308 INFO L495 AbstractCegarLoop]: Abstraction has 12508 states and 17757 transitions. [2022-11-19 07:03:55,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 5 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2022-11-19 07:03:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 12508 states and 17757 transitions. [2022-11-19 07:03:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-19 07:03:55,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:55,351 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:55,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:55,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:03:55,562 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:55,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:55,563 INFO L85 PathProgramCache]: Analyzing trace with hash -752325361, now seen corresponding path program 1 times [2022-11-19 07:03:55,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:55,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127616417] [2022-11-19 07:03:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:55,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-19 07:03:56,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:56,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127616417] [2022-11-19 07:03:56,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127616417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:56,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728095464] [2022-11-19 07:03:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:56,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:56,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:56,132 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:56,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:03:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:56,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 2034 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:03:56,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:03:57,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:03:57,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728095464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:57,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:03:57,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-19 07:03:57,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269430452] [2022-11-19 07:03:57,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:57,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:57,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:57,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:57,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:03:57,018 INFO L87 Difference]: Start difference. First operand 12508 states and 17757 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-19 07:03:57,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:57,969 INFO L93 Difference]: Finished difference Result 19250 states and 27357 transitions. [2022-11-19 07:03:57,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:03:57,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 182 [2022-11-19 07:03:57,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:58,002 INFO L225 Difference]: With dead ends: 19250 [2022-11-19 07:03:58,003 INFO L226 Difference]: Without dead ends: 5473 [2022-11-19 07:03:58,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:03:58,033 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 230 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:58,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 597 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:03:58,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2022-11-19 07:03:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4925. [2022-11-19 07:03:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4925 states, 3416 states have (on average 1.3659250585480094) internal successors, (4666), 3488 states have internal predecessors, (4666), 1121 states have call successors, (1121), 365 states have call predecessors, (1121), 387 states have return successors, (1167), 1071 states have call predecessors, (1167), 1119 states have call successors, (1167) [2022-11-19 07:03:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4925 states to 4925 states and 6954 transitions. [2022-11-19 07:03:58,697 INFO L78 Accepts]: Start accepts. Automaton has 4925 states and 6954 transitions. Word has length 182 [2022-11-19 07:03:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:58,698 INFO L495 AbstractCegarLoop]: Abstraction has 4925 states and 6954 transitions. [2022-11-19 07:03:58,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-19 07:03:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4925 states and 6954 transitions. [2022-11-19 07:03:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-19 07:03:58,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:03:58,713 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:03:58,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:58,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:58,923 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:03:58,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:03:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash 996838588, now seen corresponding path program 1 times [2022-11-19 07:03:58,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:03:58,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488939858] [2022-11-19 07:03:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:03:58,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:03:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-19 07:03:59,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:59,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488939858] [2022-11-19 07:03:59,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488939858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:03:59,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:03:59,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:03:59,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147721893] [2022-11-19 07:03:59,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:03:59,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:03:59,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:59,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:03:59,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:03:59,120 INFO L87 Difference]: Start difference. First operand 4925 states and 6954 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-19 07:04:00,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:00,010 INFO L93 Difference]: Finished difference Result 11004 states and 15497 transitions. [2022-11-19 07:04:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:04:00,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 182 [2022-11-19 07:04:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:00,036 INFO L225 Difference]: With dead ends: 11004 [2022-11-19 07:04:00,037 INFO L226 Difference]: Without dead ends: 6733 [2022-11-19 07:04:00,050 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 [2022-11-19 07:04:00,050 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 297 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:00,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 650 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:04:00,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6733 states. [2022-11-19 07:04:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6733 to 6703. [2022-11-19 07:04:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6703 states, 4756 states have (on average 1.3637510513036164) internal successors, (6486), 4847 states have internal predecessors, (6486), 1385 states have call successors, (1385), 541 states have call predecessors, (1385), 561 states have return successors, (1431), 1314 states have call predecessors, (1431), 1383 states have call successors, (1431) [2022-11-19 07:04:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6703 states to 6703 states and 9302 transitions. [2022-11-19 07:04:01,365 INFO L78 Accepts]: Start accepts. Automaton has 6703 states and 9302 transitions. Word has length 182 [2022-11-19 07:04:01,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:01,366 INFO L495 AbstractCegarLoop]: Abstraction has 6703 states and 9302 transitions. [2022-11-19 07:04:01,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-19 07:04:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 6703 states and 9302 transitions. [2022-11-19 07:04:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-19 07:04:01,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:01,393 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:01,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 07:04:01,393 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:01,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:01,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1253172053, now seen corresponding path program 1 times [2022-11-19 07:04:01,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:01,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417423692] [2022-11-19 07:04:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:01,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-19 07:04:02,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:02,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417423692] [2022-11-19 07:04:02,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417423692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:02,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:02,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:04:02,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275280126] [2022-11-19 07:04:02,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:02,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:04:02,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:02,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:04:02,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:04:02,061 INFO L87 Difference]: Start difference. First operand 6703 states and 9302 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-19 07:04:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:06,114 INFO L93 Difference]: Finished difference Result 25630 states and 37016 transitions. [2022-11-19 07:04:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:04:06,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 188 [2022-11-19 07:04:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:06,177 INFO L225 Difference]: With dead ends: 25630 [2022-11-19 07:04:06,177 INFO L226 Difference]: Without dead ends: 18943 [2022-11-19 07:04:06,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:04:06,194 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 1714 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:06,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1794 Valid, 2107 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-19 07:04:06,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18943 states. [2022-11-19 07:04:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18943 to 10339. [2022-11-19 07:04:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10339 states, 7403 states have (on average 1.3716061056328515) internal successors, (10154), 7536 states have internal predecessors, (10154), 2082 states have call successors, (2082), 810 states have call predecessors, (2082), 853 states have return successors, (2146), 1992 states have call predecessors, (2146), 2080 states have call successors, (2146) [2022-11-19 07:04:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 14382 transitions. [2022-11-19 07:04:07,602 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 14382 transitions. Word has length 188 [2022-11-19 07:04:07,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:07,603 INFO L495 AbstractCegarLoop]: Abstraction has 10339 states and 14382 transitions. [2022-11-19 07:04:07,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-19 07:04:07,604 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 14382 transitions. [2022-11-19 07:04:07,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-19 07:04:07,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:07,626 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:07,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 07:04:07,626 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:07,627 INFO L85 PathProgramCache]: Analyzing trace with hash 291854258, now seen corresponding path program 2 times [2022-11-19 07:04:07,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:07,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694406780] [2022-11-19 07:04:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:07,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-19 07:04:08,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:08,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694406780] [2022-11-19 07:04:08,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694406780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:08,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831075667] [2022-11-19 07:04:08,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:04:08,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:08,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:08,359 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:08,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:04:08,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:04:08,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:04:08,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:04:08,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-19 07:04:09,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-19 07:04:09,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831075667] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:09,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:04:09,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 7] total 17 [2022-11-19 07:04:09,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742868911] [2022-11-19 07:04:09,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:09,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:04:09,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:09,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:04:09,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:04:09,502 INFO L87 Difference]: Start difference. First operand 10339 states and 14382 transitions. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 4 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-19 07:04:12,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:12,652 INFO L93 Difference]: Finished difference Result 26791 states and 38200 transitions. [2022-11-19 07:04:12,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:04:12,653 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 4 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 182 [2022-11-19 07:04:12,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:12,707 INFO L225 Difference]: With dead ends: 26791 [2022-11-19 07:04:12,707 INFO L226 Difference]: Without dead ends: 17343 [2022-11-19 07:04:12,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:04:12,729 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 1040 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:12,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 1534 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 07:04:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17343 states. [2022-11-19 07:04:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17343 to 11231. [2022-11-19 07:04:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11231 states, 8302 states have (on average 1.376053962900506) internal successors, (11424), 8411 states have internal predecessors, (11424), 2037 states have call successors, (2037), 850 states have call predecessors, (2037), 891 states have return successors, (2097), 1969 states have call predecessors, (2097), 2035 states have call successors, (2097) [2022-11-19 07:04:14,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11231 states to 11231 states and 15558 transitions. [2022-11-19 07:04:14,489 INFO L78 Accepts]: Start accepts. Automaton has 11231 states and 15558 transitions. Word has length 182 [2022-11-19 07:04:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:14,490 INFO L495 AbstractCegarLoop]: Abstraction has 11231 states and 15558 transitions. [2022-11-19 07:04:14,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 4 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-19 07:04:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 11231 states and 15558 transitions. [2022-11-19 07:04:14,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-19 07:04:14,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:14,509 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:14,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:14,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:14,719 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1100118070, now seen corresponding path program 1 times [2022-11-19 07:04:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:14,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480588416] [2022-11-19 07:04:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:14,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-19 07:04:15,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:15,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480588416] [2022-11-19 07:04:15,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480588416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:15,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707505633] [2022-11-19 07:04:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:15,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:15,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:15,351 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:15,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:04:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:15,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 2029 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-19 07:04:15,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-19 07:04:16,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:04:16,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707505633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:16,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:04:16,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-19 07:04:16,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968688280] [2022-11-19 07:04:16,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:16,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:04:16,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:16,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:04:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:04:16,707 INFO L87 Difference]: Start difference. First operand 11231 states and 15558 transitions. Second operand has 8 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-19 07:04:20,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:20,394 INFO L93 Difference]: Finished difference Result 31225 states and 43704 transitions. [2022-11-19 07:04:20,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:04:20,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 188 [2022-11-19 07:04:20,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:20,449 INFO L225 Difference]: With dead ends: 31225 [2022-11-19 07:04:20,449 INFO L226 Difference]: Without dead ends: 21330 [2022-11-19 07:04:20,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:04:20,468 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 767 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:20,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 1742 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 07:04:20,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21330 states. [2022-11-19 07:04:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21330 to 17878. [2022-11-19 07:04:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17878 states, 13588 states have (on average 1.3843832793641448) internal successors, (18811), 13787 states have internal predecessors, (18811), 2932 states have call successors, (2932), 1333 states have call predecessors, (2932), 1357 states have return successors, (3035), 2757 states have call predecessors, (3035), 2930 states have call successors, (3035) [2022-11-19 07:04:22,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17878 states to 17878 states and 24778 transitions. [2022-11-19 07:04:22,517 INFO L78 Accepts]: Start accepts. Automaton has 17878 states and 24778 transitions. Word has length 188 [2022-11-19 07:04:22,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:22,517 INFO L495 AbstractCegarLoop]: Abstraction has 17878 states and 24778 transitions. [2022-11-19 07:04:22,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 3 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-19 07:04:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 17878 states and 24778 transitions. [2022-11-19 07:04:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-19 07:04:22,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:22,534 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:22,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:22,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 07:04:22,745 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:22,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:22,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1900379957, now seen corresponding path program 1 times [2022-11-19 07:04:22,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:22,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648124305] [2022-11-19 07:04:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:22,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-19 07:04:23,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:23,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648124305] [2022-11-19 07:04:23,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648124305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:23,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460634282] [2022-11-19 07:04:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:23,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:23,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:23,546 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:23,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:04:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:24,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 2068 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:04:24,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-19 07:04:24,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-19 07:04:24,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460634282] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:24,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:04:24,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 8] total 16 [2022-11-19 07:04:24,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318295991] [2022-11-19 07:04:24,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:24,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:04:24,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:24,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:04:24,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:04:24,838 INFO L87 Difference]: Start difference. First operand 17878 states and 24778 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 5 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-19 07:04:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:30,790 INFO L93 Difference]: Finished difference Result 42021 states and 60484 transitions. [2022-11-19 07:04:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:04:30,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 5 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 186 [2022-11-19 07:04:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:30,991 INFO L225 Difference]: With dead ends: 42021 [2022-11-19 07:04:30,991 INFO L226 Difference]: Without dead ends: 34027 [2022-11-19 07:04:31,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 368 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:04:31,006 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 1319 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:31,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1363 Valid, 2037 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-19 07:04:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34027 states. [2022-11-19 07:04:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34027 to 17850. [2022-11-19 07:04:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17850 states, 13560 states have (on average 1.3851769911504426) internal successors, (18783), 13759 states have internal predecessors, (18783), 2932 states have call successors, (2932), 1333 states have call predecessors, (2932), 1357 states have return successors, (3035), 2757 states have call predecessors, (3035), 2930 states have call successors, (3035) [2022-11-19 07:04:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17850 states to 17850 states and 24750 transitions. [2022-11-19 07:04:33,202 INFO L78 Accepts]: Start accepts. Automaton has 17850 states and 24750 transitions. Word has length 186 [2022-11-19 07:04:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:33,203 INFO L495 AbstractCegarLoop]: Abstraction has 17850 states and 24750 transitions. [2022-11-19 07:04:33,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 5 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-19 07:04:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 17850 states and 24750 transitions. [2022-11-19 07:04:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-19 07:04:33,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:33,223 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:33,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:33,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 07:04:33,432 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:33,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:33,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1850243766, now seen corresponding path program 1 times [2022-11-19 07:04:33,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:33,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651383063] [2022-11-19 07:04:33,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:33,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-19 07:04:34,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:34,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651383063] [2022-11-19 07:04:34,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651383063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:34,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541599314] [2022-11-19 07:04:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:34,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:34,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:34,219 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:34,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:04:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:34,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 2390 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:04:34,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-19 07:04:35,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:04:35,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541599314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:35,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:04:35,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-19 07:04:35,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542231562] [2022-11-19 07:04:35,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:35,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:04:35,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:35,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:04:35,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:04:35,277 INFO L87 Difference]: Start difference. First operand 17850 states and 24750 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-19 07:04:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:39,587 INFO L93 Difference]: Finished difference Result 31211 states and 44347 transitions. [2022-11-19 07:04:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:04:39,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 208 [2022-11-19 07:04:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:39,655 INFO L225 Difference]: With dead ends: 31211 [2022-11-19 07:04:39,655 INFO L226 Difference]: Without dead ends: 31208 [2022-11-19 07:04:39,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:04:39,662 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 651 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:39,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 837 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:04:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31208 states. [2022-11-19 07:04:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31208 to 17849. [2022-11-19 07:04:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17849 states, 13560 states have (on average 1.3841445427728614) internal successors, (18769), 13758 states have internal predecessors, (18769), 2931 states have call successors, (2931), 1333 states have call predecessors, (2931), 1357 states have return successors, (3035), 2757 states have call predecessors, (3035), 2930 states have call successors, (3035) [2022-11-19 07:04:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 24735 transitions. [2022-11-19 07:04:42,067 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 24735 transitions. Word has length 208 [2022-11-19 07:04:42,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:42,067 INFO L495 AbstractCegarLoop]: Abstraction has 17849 states and 24735 transitions. [2022-11-19 07:04:42,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-19 07:04:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 24735 transitions. [2022-11-19 07:04:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-19 07:04:42,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:42,082 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:42,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-19 07:04:42,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 07:04:42,291 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:42,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:42,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1921492187, now seen corresponding path program 1 times [2022-11-19 07:04:42,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:42,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706795679] [2022-11-19 07:04:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:42,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-19 07:04:42,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:42,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706795679] [2022-11-19 07:04:42,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706795679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:42,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280970771] [2022-11-19 07:04:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:42,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:42,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:42,927 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:42,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:04:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:43,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:04:43,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-19 07:04:43,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:04:43,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280970771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:43,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:04:43,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-19 07:04:43,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037446532] [2022-11-19 07:04:43,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:43,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:04:43,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:43,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:04:43,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:04:43,744 INFO L87 Difference]: Start difference. First operand 17849 states and 24735 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-19 07:04:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:46,872 INFO L93 Difference]: Finished difference Result 40174 states and 56145 transitions. [2022-11-19 07:04:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:04:46,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 207 [2022-11-19 07:04:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:46,917 INFO L225 Difference]: With dead ends: 40174 [2022-11-19 07:04:46,917 INFO L226 Difference]: Without dead ends: 22713 [2022-11-19 07:04:46,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:04:46,940 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 419 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:46,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 1773 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:04:46,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22713 states. [2022-11-19 07:04:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22713 to 19643. [2022-11-19 07:04:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19643 states, 14998 states have (on average 1.3837845046006134) internal successors, (20754), 15206 states have internal predecessors, (20754), 3154 states have call successors, (3154), 1458 states have call predecessors, (3154), 1490 states have return successors, (3266), 2978 states have call predecessors, (3266), 3153 states have call successors, (3266) [2022-11-19 07:04:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19643 states to 19643 states and 27174 transitions. [2022-11-19 07:04:49,216 INFO L78 Accepts]: Start accepts. Automaton has 19643 states and 27174 transitions. Word has length 207 [2022-11-19 07:04:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:49,217 INFO L495 AbstractCegarLoop]: Abstraction has 19643 states and 27174 transitions. [2022-11-19 07:04:49,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 3 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-19 07:04:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 19643 states and 27174 transitions. [2022-11-19 07:04:49,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-19 07:04:49,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:49,236 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:49,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:49,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 07:04:49,441 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:04:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:49,441 INFO L85 PathProgramCache]: Analyzing trace with hash -938764311, now seen corresponding path program 1 times [2022-11-19 07:04:49,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:49,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486070235] [2022-11-19 07:04:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:49,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-19 07:04:50,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:50,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486070235] [2022-11-19 07:04:50,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486070235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:50,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132486854] [2022-11-19 07:04:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:50,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:50,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:50,043 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:50,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:04:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:50,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-19 07:04:50,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-19 07:04:51,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-19 07:04:51,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132486854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:51,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2121621970] [2022-11-19 07:04:51,681 INFO L159 IcfgInterpreter]: Started Sifa with 146 locations of interest [2022-11-19 07:04:51,681 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:04:51,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:04:51,694 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:04:51,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:05:07,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:08,268 INFO L321 Elim1Store]: treesize reduction 250, result has 47.5 percent of original size [2022-11-19 07:05:08,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 26 select indices, 26 select index equivalence classes, 327 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 25 case distinctions, treesize of input 137 treesize of output 314 [2022-11-19 07:05:08,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:09,398 INFO L321 Elim1Store]: treesize reduction 450, result has 33.4 percent of original size [2022-11-19 07:05:09,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 28 select indices, 28 select index equivalence classes, 353 disjoint index pairs (out of 378 index pairs), introduced 28 new quantified variables, introduced 50 case distinctions, treesize of input 147 treesize of output 325 [2022-11-19 07:05:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 85 select indices, 85 select index equivalence classes, 879 disjoint index pairs (out of 3570 index pairs), introduced 85 new quantified variables, introduced 0 case distinctions, treesize of input 710 treesize of output 256 [2022-11-19 07:05:11,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 27 select indices, 27 select index equivalence classes, 352 disjoint index pairs (out of 351 index pairs), introduced 27 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 82 [2022-11-19 07:05:11,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 28 select indices, 28 select index equivalence classes, 378 disjoint index pairs (out of 378 index pairs), introduced 28 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 85 [2022-11-19 07:05:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 85 select indices, 85 select index equivalence classes, 879 disjoint index pairs (out of 3570 index pairs), introduced 85 new quantified variables, introduced 0 case distinctions, treesize of input 710 treesize of output 256 [2022-11-19 07:05:13,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:13,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 27 select indices, 27 select index equivalence classes, 352 disjoint index pairs (out of 351 index pairs), introduced 27 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 82 [2022-11-19 07:05:14,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:14,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 28 select indices, 28 select index equivalence classes, 378 disjoint index pairs (out of 378 index pairs), introduced 28 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 85 [2022-11-19 07:05:20,483 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 251 for LOIs [2022-11-19 07:05:20,812 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:05:35,953 WARN L233 SmtUtils]: Spent 14.70s on a formula simplification. DAG size of input: 1036 DAG size of output: 984 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:05:46,548 WARN L233 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 647 DAG size of output: 644 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:05:53,463 WARN L233 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 651 DAG size of output: 648 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:00,844 WARN L233 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 659 DAG size of output: 653 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:08,713 WARN L233 SmtUtils]: Spent 7.46s on a formula simplification. DAG size of input: 685 DAG size of output: 679 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:16,981 WARN L233 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 702 DAG size of output: 685 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:25,626 WARN L233 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 716 DAG size of output: 699 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:06:25,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2121621970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:25,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:06:25,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 10, 8] total 30 [2022-11-19 07:06:25,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649819632] [2022-11-19 07:06:25,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:25,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:06:25,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:25,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:06:25,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:06:25,644 INFO L87 Difference]: Start difference. First operand 19643 states and 27174 transitions. Second operand has 12 states, 9 states have (on average 11.777777777777779) internal successors, (106), 7 states have internal predecessors, (106), 4 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-19 07:06:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:32,740 INFO L93 Difference]: Finished difference Result 39290 states and 54358 transitions. [2022-11-19 07:06:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:06:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 11.777777777777779) internal successors, (106), 7 states have internal predecessors, (106), 4 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 207 [2022-11-19 07:06:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:32,781 INFO L225 Difference]: With dead ends: 39290 [2022-11-19 07:06:32,781 INFO L226 Difference]: Without dead ends: 19663 [2022-11-19 07:06:32,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 65.1s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:06:32,813 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 17 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:32,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1345 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-19 07:06:32,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19663 states. [2022-11-19 07:06:35,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19663 to 19659. [2022-11-19 07:06:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19659 states, 15008 states have (on average 1.3835954157782515) internal successors, (20765), 15216 states have internal predecessors, (20765), 3158 states have call successors, (3158), 1459 states have call predecessors, (3158), 1492 states have return successors, (3274), 2983 states have call predecessors, (3274), 3157 states have call successors, (3274) [2022-11-19 07:06:35,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19659 states to 19659 states and 27197 transitions. [2022-11-19 07:06:35,506 INFO L78 Accepts]: Start accepts. Automaton has 19659 states and 27197 transitions. Word has length 207 [2022-11-19 07:06:35,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:35,506 INFO L495 AbstractCegarLoop]: Abstraction has 19659 states and 27197 transitions. [2022-11-19 07:06:35,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 11.777777777777779) internal successors, (106), 7 states have internal predecessors, (106), 4 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-19 07:06:35,507 INFO L276 IsEmpty]: Start isEmpty. Operand 19659 states and 27197 transitions. [2022-11-19 07:06:35,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-19 07:06:35,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:35,524 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:35,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:35,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 07:06:35,735 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:35,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:35,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1990026330, now seen corresponding path program 1 times [2022-11-19 07:06:35,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:35,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282490] [2022-11-19 07:06:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:35,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-19 07:06:36,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:36,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282490] [2022-11-19 07:06:36,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:36,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251048266] [2022-11-19 07:06:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:36,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:36,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:36,404 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:36,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:06:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:36,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 2169 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-19 07:06:36,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-19 07:06:37,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:37,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251048266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:37,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:37,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-19 07:06:37,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767308560] [2022-11-19 07:06:37,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:37,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:06:37,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:37,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:06:37,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:06:37,369 INFO L87 Difference]: Start difference. First operand 19659 states and 27197 transitions. Second operand has 8 states, 7 states have (on average 16.714285714285715) internal successors, (117), 5 states have internal predecessors, (117), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-19 07:06:41,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:41,728 INFO L93 Difference]: Finished difference Result 44128 states and 61498 transitions. [2022-11-19 07:06:41,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:06:41,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 16.714285714285715) internal successors, (117), 5 states have internal predecessors, (117), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) Word has length 208 [2022-11-19 07:06:41,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:41,776 INFO L225 Difference]: With dead ends: 44128 [2022-11-19 07:06:41,776 INFO L226 Difference]: Without dead ends: 24515 [2022-11-19 07:06:41,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:06:41,798 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 515 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:41,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1914 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 07:06:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24515 states. [2022-11-19 07:06:44,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24515 to 19987. [2022-11-19 07:06:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19987 states, 15232 states have (on average 1.3779543067226891) internal successors, (20989), 15424 states have internal predecessors, (20989), 3158 states have call successors, (3158), 1459 states have call predecessors, (3158), 1596 states have return successors, (3482), 3103 states have call predecessors, (3482), 3157 states have call successors, (3482) [2022-11-19 07:06:44,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19987 states to 19987 states and 27629 transitions. [2022-11-19 07:06:44,449 INFO L78 Accepts]: Start accepts. Automaton has 19987 states and 27629 transitions. Word has length 208 [2022-11-19 07:06:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:44,450 INFO L495 AbstractCegarLoop]: Abstraction has 19987 states and 27629 transitions. [2022-11-19 07:06:44,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 16.714285714285715) internal successors, (117), 5 states have internal predecessors, (117), 2 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 4 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-19 07:06:44,450 INFO L276 IsEmpty]: Start isEmpty. Operand 19987 states and 27629 transitions. [2022-11-19 07:06:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-19 07:06:44,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:44,472 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:44,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:44,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:44,682 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:44,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:44,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1196121099, now seen corresponding path program 2 times [2022-11-19 07:06:44,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:44,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040735421] [2022-11-19 07:06:44,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:44,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-19 07:06:45,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:45,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040735421] [2022-11-19 07:06:45,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040735421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:45,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243547018] [2022-11-19 07:06:45,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:06:45,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:45,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:45,363 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:45,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:06:46,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:06:46,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:06:46,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1925 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:06:46,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-19 07:06:46,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:06:46,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243547018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:06:46,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:06:46,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-11-19 07:06:46,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354478873] [2022-11-19 07:06:46,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:46,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:06:46,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:46,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:06:46,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:06:46,605 INFO L87 Difference]: Start difference. First operand 19987 states and 27629 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 5 states have internal predecessors, (117), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-19 07:06:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:50,128 INFO L93 Difference]: Finished difference Result 29028 states and 40366 transitions. [2022-11-19 07:06:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:06:50,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 5 states have internal predecessors, (117), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) Word has length 212 [2022-11-19 07:06:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:50,187 INFO L225 Difference]: With dead ends: 29028 [2022-11-19 07:06:50,188 INFO L226 Difference]: Without dead ends: 20004 [2022-11-19 07:06:50,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:06:50,206 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 356 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:50,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 1138 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:06:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20004 states. [2022-11-19 07:06:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20004 to 20004. [2022-11-19 07:06:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20004 states, 15249 states have (on average 1.3775329529805234) internal successors, (21006), 15441 states have internal predecessors, (21006), 3158 states have call successors, (3158), 1459 states have call predecessors, (3158), 1596 states have return successors, (3482), 3103 states have call predecessors, (3482), 3157 states have call successors, (3482) [2022-11-19 07:06:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20004 states to 20004 states and 27646 transitions. [2022-11-19 07:06:52,758 INFO L78 Accepts]: Start accepts. Automaton has 20004 states and 27646 transitions. Word has length 212 [2022-11-19 07:06:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:06:52,759 INFO L495 AbstractCegarLoop]: Abstraction has 20004 states and 27646 transitions. [2022-11-19 07:06:52,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 5 states have internal predecessors, (117), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-19 07:06:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 20004 states and 27646 transitions. [2022-11-19 07:06:52,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-19 07:06:52,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:06:52,774 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:06:52,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:06:52,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 07:06:52,979 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:06:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:06:52,980 INFO L85 PathProgramCache]: Analyzing trace with hash 142501473, now seen corresponding path program 1 times [2022-11-19 07:06:52,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:06:52,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943773615] [2022-11-19 07:06:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:52,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:06:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-19 07:06:53,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:06:53,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943773615] [2022-11-19 07:06:53,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943773615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:53,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63848034] [2022-11-19 07:06:53,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:06:53,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:06:53,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:06:53,671 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:06:53,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:06:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:06:54,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 2289 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:06:54,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:06:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-19 07:06:54,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:06:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-19 07:06:54,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63848034] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:06:54,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:06:54,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 9 [2022-11-19 07:06:54,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936389087] [2022-11-19 07:06:54,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:06:54,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:06:54,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:06:54,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:06:54,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:06:54,550 INFO L87 Difference]: Start difference. First operand 20004 states and 27646 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-19 07:06:57,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:06:57,724 INFO L93 Difference]: Finished difference Result 29028 states and 40349 transitions. [2022-11-19 07:06:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:06:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 213 [2022-11-19 07:06:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:06:57,781 INFO L225 Difference]: With dead ends: 29028 [2022-11-19 07:06:57,781 INFO L226 Difference]: Without dead ends: 20021 [2022-11-19 07:06:57,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:06:57,799 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 4 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:06:57,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 953 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:06:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20021 states. [2022-11-19 07:07:00,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20021 to 20021. [2022-11-19 07:07:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20021 states, 15266 states have (on average 1.3771125376654003) internal successors, (21023), 15458 states have internal predecessors, (21023), 3158 states have call successors, (3158), 1459 states have call predecessors, (3158), 1596 states have return successors, (3482), 3103 states have call predecessors, (3482), 3157 states have call successors, (3482) [2022-11-19 07:07:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20021 states to 20021 states and 27663 transitions. [2022-11-19 07:07:00,365 INFO L78 Accepts]: Start accepts. Automaton has 20021 states and 27663 transitions. Word has length 213 [2022-11-19 07:07:00,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:07:00,366 INFO L495 AbstractCegarLoop]: Abstraction has 20021 states and 27663 transitions. [2022-11-19 07:07:00,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-19 07:07:00,366 INFO L276 IsEmpty]: Start isEmpty. Operand 20021 states and 27663 transitions. [2022-11-19 07:07:00,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-19 07:07:00,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:07:00,382 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:07:00,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-19 07:07:00,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 07:07:00,583 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:07:00,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:07:00,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1178008461, now seen corresponding path program 1 times [2022-11-19 07:07:00,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:07:00,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246399609] [2022-11-19 07:07:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:00,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:07:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-19 07:07:01,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:07:01,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246399609] [2022-11-19 07:07:01,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246399609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:07:01,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344944197] [2022-11-19 07:07:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:07:01,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:07:01,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:07:01,299 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:07:01,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d38c9023-9da5-4721-a961-144d9950fc74/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:07:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:07:02,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 2308 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:07:02,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:07:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-19 07:07:02,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:07:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-19 07:07:02,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344944197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:07:02,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1764690205] [2022-11-19 07:07:02,550 INFO L159 IcfgInterpreter]: Started Sifa with 146 locations of interest [2022-11-19 07:07:02,551 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:07:02,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:07:02,552 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:07:02,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs