./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0 --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 c454dc64a3cc485840c6830ce9e1c132fc674b92d2da550d28087d832958d75f --- 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-e04fb08 [2022-11-16 19:32:40,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:32:40,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:32:40,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:32:40,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:32:40,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:32:40,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:32:40,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:32:40,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:32:40,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:32:40,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:32:40,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:32:40,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:32:40,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:32:40,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:32:40,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:32:40,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:32:40,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:32:40,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:32:40,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:32:40,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:32:40,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:32:40,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:32:40,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:32:40,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:32:40,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:32:40,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:32:40,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:32:40,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:32:40,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:32:40,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:32:40,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:32:40,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:32:40,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:32:40,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:32:40,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:32:40,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:32:40,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:32:40,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:32:40,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:32:40,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:32:40,801 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-16 19:32:40,851 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:32:40,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:32:40,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:32:40,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:32:40,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:32:40,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:32:40,854 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:32:40,854 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:32:40,855 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:32:40,855 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:32:40,856 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:32:40,856 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:32:40,857 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:32:40,857 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:32:40,857 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:32:40,857 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:32:40,858 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:32:40,858 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:32:40,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:32:40,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:32:40,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:32:40,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:32:40,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:32:40,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:32:40,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:32:40,862 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:32:40,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:32:40,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:32:40,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:32:40,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:32:40,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:32:40,864 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:32:40,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:32:40,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:32:40,865 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:32:40,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:32:40,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:32:40,865 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:32:40,866 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_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c454dc64a3cc485840c6830ce9e1c132fc674b92d2da550d28087d832958d75f [2022-11-16 19:32:41,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:32:41,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:32:41,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:32:41,175 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:32:41,176 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:32:41,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i [2022-11-16 19:32:41,247 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/data/2210db473/ff46f2cc1a9346848c5313fcd04107e3/FLAG243c71d38 [2022-11-16 19:32:42,065 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:32:42,066 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i [2022-11-16 19:32:42,111 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/data/2210db473/ff46f2cc1a9346848c5313fcd04107e3/FLAG243c71d38 [2022-11-16 19:32:42,581 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/data/2210db473/ff46f2cc1a9346848c5313fcd04107e3 [2022-11-16 19:32:42,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:32:42,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:32:42,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:32:42,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:32:42,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:32:42,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:32:42" (1/1) ... [2022-11-16 19:32:42,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dddbed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:42, skipping insertion in model container [2022-11-16 19:32:42,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:32:42" (1/1) ... [2022-11-16 19:32:42,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:32:42,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:32:44,686 WARN L229 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_91f58695-76e8-496f-8d5e-489c1c2f83bf/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i[301264,301277] [2022-11-16 19:32:44,731 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-16 19:32:44,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:32:44,814 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:32:45,240 WARN L229 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_91f58695-76e8-496f-8d5e-489c1c2f83bf/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i[301264,301277] [2022-11-16 19:32:45,245 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-16 19:32:45,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:32:45,391 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:32:45,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:45 WrapperNode [2022-11-16 19:32:45,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:32:45,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:32:45,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:32:45,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:32:45,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:45" (1/1) ... [2022-11-16 19:32:45,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:45" (1/1) ... [2022-11-16 19:32:45,623 INFO L138 Inliner]: procedures = 221, calls = 2343, calls flagged for inlining = 115, calls inlined = 111, statements flattened = 4810 [2022-11-16 19:32:45,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:32:45,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:32:45,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:32:45,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:32:45,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:45" (1/1) ... [2022-11-16 19:32:45,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:45" (1/1) ... [2022-11-16 19:32:45,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:45" (1/1) ... [2022-11-16 19:32:45,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:45" (1/1) ... [2022-11-16 19:32:45,857 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:45" (1/1) ... [2022-11-16 19:32:45,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:45" (1/1) ... [2022-11-16 19:32:45,894 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:45" (1/1) ... [2022-11-16 19:32:45,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:45" (1/1) ... [2022-11-16 19:32:45,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:32:45,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:32:45,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:32:45,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:32:45,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:45" (1/1) ... [2022-11-16 19:32:45,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:32:45,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:32:45,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:32:45,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:32:46,002 INFO L130 BoogieDeclarations]: Found specification of procedure platform_driver_unregister [2022-11-16 19:32:46,003 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_driver_unregister [2022-11-16 19:32:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-16 19:32:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-16 19:32:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-16 19:32:46,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-16 19:32:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-16 19:32:46,003 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-16 19:32:46,003 INFO L130 BoogieDeclarations]: Found specification of procedure irda_setup_dma [2022-11-16 19:32:46,004 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_setup_dma [2022-11-16 19:32:46,004 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-16 19:32:46,004 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-16 19:32:46,004 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-16 19:32:46,004 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-16 19:32:46,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-16 19:32:46,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-16 19:32:46,004 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_dma_receive_complete [2022-11-16 19:32:46,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_dma_receive_complete [2022-11-16 19:32:46,005 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-16 19:32:46,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-16 19:32:46,005 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2022-11-16 19:32:46,005 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2022-11-16 19:32:46,005 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-16 19:32:46,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-16 19:32:46,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-16 19:32:46,005 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-16 19:32:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 19:32:46,006 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 19:32:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-16 19:32:46,006 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-16 19:32:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_get [2022-11-16 19:32:46,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_get [2022-11-16 19:32:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure switch_bank [2022-11-16 19:32:46,006 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_bank [2022-11-16 19:32:46,006 INFO L130 BoogieDeclarations]: Found specification of procedure dma_zalloc_coherent [2022-11-16 19:32:46,007 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_zalloc_coherent [2022-11-16 19:32:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-16 19:32:46,007 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-16 19:32:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:32:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 19:32:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-16 19:32:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-16 19:32:46,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-16 19:32:46,007 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_remove_4 [2022-11-16 19:32:46,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_remove_4 [2022-11-16 19:32:46,008 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-16 19:32:46,008 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-16 19:32:46,008 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_dma_receive [2022-11-16 19:32:46,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_dma_receive [2022-11-16 19:32:46,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:32:46,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 19:32:46,008 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2022-11-16 19:32:46,008 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2022-11-16 19:32:46,009 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_net_ioctl [2022-11-16 19:32:46,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_net_ioctl [2022-11-16 19:32:46,009 INFO L130 BoogieDeclarations]: Found specification of procedure SetCOMInterrupts [2022-11-16 19:32:46,009 INFO L138 BoogieDeclarations]: Found implementation of procedure SetCOMInterrupts [2022-11-16 19:32:46,009 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-16 19:32:46,009 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-16 19:32:46,009 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-16 19:32:46,009 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-16 19:32:46,009 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-16 19:32:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-16 19:32:46,010 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_change_dongle_speed [2022-11-16 19:32:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_change_dongle_speed [2022-11-16 19:32:46,010 INFO L130 BoogieDeclarations]: Found specification of procedure SIR2FIR [2022-11-16 19:32:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure SIR2FIR [2022-11-16 19:32:46,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-16 19:32:46,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-16 19:32:46,010 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_net_close [2022-11-16 19:32:46,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_net_close [2022-11-16 19:32:46,010 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2022-11-16 19:32:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2022-11-16 19:32:46,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:32:46,011 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-16 19:32:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-16 19:32:46,011 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_dma_xmit [2022-11-16 19:32:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_dma_xmit [2022-11-16 19:32:46,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-16 19:32:46,011 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-16 19:32:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_watching [2022-11-16 19:32:46,012 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_watching [2022-11-16 19:32:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-16 19:32:46,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-16 19:32:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure irda_get_next_speed [2022-11-16 19:32:46,012 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_get_next_speed [2022-11-16 19:32:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_net_open [2022-11-16 19:32:46,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_net_open [2022-11-16 19:32:46,012 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2022-11-16 19:32:46,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2022-11-16 19:32:46,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:32:46,013 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2022-11-16 19:32:46,013 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2022-11-16 19:32:46,013 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2022-11-16 19:32:46,013 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2022-11-16 19:32:46,013 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-16 19:32:46,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-16 19:32:46,014 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-16 19:32:46,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-16 19:32:46,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 19:32:46,014 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-16 19:32:46,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-16 19:32:46,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:32:46,014 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-16 19:32:46,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-16 19:32:46,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 19:32:46,015 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2022-11-16 19:32:46,015 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2022-11-16 19:32:46,015 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-16 19:32:46,015 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2022-11-16 19:32:46,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2022-11-16 19:32:46,015 INFO L130 BoogieDeclarations]: Found specification of procedure FIR2SIR [2022-11-16 19:32:46,016 INFO L138 BoogieDeclarations]: Found implementation of procedure FIR2SIR [2022-11-16 19:32:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_drvdata [2022-11-16 19:32:46,016 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_drvdata [2022-11-16 19:32:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_change_speed [2022-11-16 19:32:46,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_change_speed [2022-11-16 19:32:46,016 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-16 19:32:46,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-16 19:32:46,017 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-16 19:32:46,017 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-16 19:32:46,017 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_unlock [2022-11-16 19:32:46,017 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_unlock [2022-11-16 19:32:46,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:32:46,017 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_resume [2022-11-16 19:32:46,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_resume [2022-11-16 19:32:46,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:32:46,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:32:46,709 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:32:46,712 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:32:48,170 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-16 19:32:53,542 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:32:55,153 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:32:55,153 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-16 19:32:55,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:32:55 BoogieIcfgContainer [2022-11-16 19:32:55,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:32:55,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:32:55,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:32:55,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:32:55,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:32:42" (1/3) ... [2022-11-16 19:32:55,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@440d912f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:32:55, skipping insertion in model container [2022-11-16 19:32:55,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:45" (2/3) ... [2022-11-16 19:32:55,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@440d912f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:32:55, skipping insertion in model container [2022-11-16 19:32:55,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:32:55" (3/3) ... [2022-11-16 19:32:55,166 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i [2022-11-16 19:32:55,186 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:32:55,186 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:32:55,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:32:55,303 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;@49fc60d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:32:55,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:32:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 1064 states, 597 states have (on average 1.3249581239530988) internal successors, (791), 625 states have internal predecessors, (791), 411 states have call successors, (411), 55 states have call predecessors, (411), 54 states have return successors, (404), 395 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-16 19:32:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-16 19:32:55,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:32:55,368 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:32:55,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:32:55,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:32:55,376 INFO L85 PathProgramCache]: Analyzing trace with hash 681269214, now seen corresponding path program 1 times [2022-11-16 19:32:55,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:32:55,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900880140] [2022-11-16 19:32:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:32:55,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:32:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:32:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-16 19:32:57,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:32:57,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900880140] [2022-11-16 19:32:57,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900880140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:32:57,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:32:57,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:32:57,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220601383] [2022-11-16 19:32:57,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:32:57,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:32:57,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:32:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:32:57,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:32:57,123 INFO L87 Difference]: Start difference. First operand has 1064 states, 597 states have (on average 1.3249581239530988) internal successors, (791), 625 states have internal predecessors, (791), 411 states have call successors, (411), 55 states have call predecessors, (411), 54 states have return successors, (404), 395 states have call predecessors, (404), 404 states have call successors, (404) Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-16 19:32:59,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:01,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:06,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:09,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:09,118 INFO L93 Difference]: Finished difference Result 3094 states and 4698 transitions. [2022-11-16 19:33:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:33:09,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 178 [2022-11-16 19:33:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:09,169 INFO L225 Difference]: With dead ends: 3094 [2022-11-16 19:33:09,170 INFO L226 Difference]: Without dead ends: 1981 [2022-11-16 19:33:09,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:33:09,188 INFO L413 NwaCegarLoop]: 1914 mSDtfsCounter, 1484 mSDsluCounter, 5194 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1488 SdHoareTripleChecker+Valid, 7108 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:09,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1488 Valid, 7108 Invalid, 942 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 937 Invalid, 2 Unknown, 0 Unchecked, 11.6s Time] [2022-11-16 19:33:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2022-11-16 19:33:09,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1971. [2022-11-16 19:33:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1111 states have (on average 1.3159315931593158) internal successors, (1462), 1150 states have internal predecessors, (1462), 757 states have call successors, (757), 103 states have call predecessors, (757), 102 states have return successors, (760), 737 states have call predecessors, (760), 756 states have call successors, (760) [2022-11-16 19:33:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2979 transitions. [2022-11-16 19:33:09,487 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2979 transitions. Word has length 178 [2022-11-16 19:33:09,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:09,490 INFO L495 AbstractCegarLoop]: Abstraction has 1971 states and 2979 transitions. [2022-11-16 19:33:09,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-16 19:33:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2979 transitions. [2022-11-16 19:33:09,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-16 19:33:09,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:09,515 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:09,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:33:09,516 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:09,516 INFO L85 PathProgramCache]: Analyzing trace with hash 75184833, now seen corresponding path program 1 times [2022-11-16 19:33:09,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:09,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663625707] [2022-11-16 19:33:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:09,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-16 19:33:10,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:10,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663625707] [2022-11-16 19:33:10,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663625707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:33:10,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:33:10,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:33:10,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4540987] [2022-11-16 19:33:10,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:33:10,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:33:10,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:10,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:33:10,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:33:10,493 INFO L87 Difference]: Start difference. First operand 1971 states and 2979 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-16 19:33:11,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:17,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:19,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:22,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:22,287 INFO L93 Difference]: Finished difference Result 4940 states and 7467 transitions. [2022-11-16 19:33:22,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:33:22,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 180 [2022-11-16 19:33:22,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:22,310 INFO L225 Difference]: With dead ends: 4940 [2022-11-16 19:33:22,311 INFO L226 Difference]: Without dead ends: 2988 [2022-11-16 19:33:22,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:33:22,324 INFO L413 NwaCegarLoop]: 1852 mSDtfsCounter, 1514 mSDsluCounter, 5026 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 6878 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:22,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1518 Valid, 6878 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 911 Invalid, 1 Unknown, 0 Unchecked, 11.5s Time] [2022-11-16 19:33:22,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2022-11-16 19:33:22,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2976. [2022-11-16 19:33:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 1680 states have (on average 1.3142857142857143) internal successors, (2208), 1738 states have internal predecessors, (2208), 1139 states have call successors, (1139), 157 states have call predecessors, (1139), 156 states have return successors, (1146), 1110 states have call predecessors, (1146), 1138 states have call successors, (1146) [2022-11-16 19:33:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4493 transitions. [2022-11-16 19:33:22,628 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4493 transitions. Word has length 180 [2022-11-16 19:33:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:22,630 INFO L495 AbstractCegarLoop]: Abstraction has 2976 states and 4493 transitions. [2022-11-16 19:33:22,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-16 19:33:22,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4493 transitions. [2022-11-16 19:33:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-16 19:33:22,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:22,649 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:22,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:33:22,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:22,659 INFO L85 PathProgramCache]: Analyzing trace with hash -637691305, now seen corresponding path program 1 times [2022-11-16 19:33:22,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:22,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659875603] [2022-11-16 19:33:22,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:22,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-16 19:33:23,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:23,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659875603] [2022-11-16 19:33:23,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659875603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:33:23,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:33:23,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:33:23,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956286374] [2022-11-16 19:33:23,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:33:23,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:33:23,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:23,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:33:23,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:33:23,470 INFO L87 Difference]: Start difference. First operand 2976 states and 4493 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-16 19:33:24,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:29,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:33,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:33,621 INFO L93 Difference]: Finished difference Result 5955 states and 8987 transitions. [2022-11-16 19:33:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:33:33,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 179 [2022-11-16 19:33:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:33,642 INFO L225 Difference]: With dead ends: 5955 [2022-11-16 19:33:33,643 INFO L226 Difference]: Without dead ends: 2998 [2022-11-16 19:33:33,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:33:33,660 INFO L413 NwaCegarLoop]: 1861 mSDtfsCounter, 1514 mSDsluCounter, 5044 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 6905 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:33,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1518 Valid, 6905 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-11-16 19:33:33,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2022-11-16 19:33:33,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2986. [2022-11-16 19:33:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 1688 states have (on average 1.3127962085308056) internal successors, (2216), 1746 states have internal predecessors, (2216), 1139 states have call successors, (1139), 159 states have call predecessors, (1139), 158 states have return successors, (1146), 1110 states have call predecessors, (1146), 1138 states have call successors, (1146) [2022-11-16 19:33:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 4501 transitions. [2022-11-16 19:33:33,922 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 4501 transitions. Word has length 179 [2022-11-16 19:33:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:33,923 INFO L495 AbstractCegarLoop]: Abstraction has 2986 states and 4501 transitions. [2022-11-16 19:33:33,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-16 19:33:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 4501 transitions. [2022-11-16 19:33:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-16 19:33:33,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:33,934 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:33,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 19:33:33,934 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:33,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:33,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1120815788, now seen corresponding path program 1 times [2022-11-16 19:33:33,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:33,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833402916] [2022-11-16 19:33:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:33,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-16 19:33:34,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:34,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833402916] [2022-11-16 19:33:34,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833402916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:33:34,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:33:34,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:33:34,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759368466] [2022-11-16 19:33:34,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:33:34,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:33:34,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:34,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:33:34,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:33:34,512 INFO L87 Difference]: Start difference. First operand 2986 states and 4501 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-16 19:33:35,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:41,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:43,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:45,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:48,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:49,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:51,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:33:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:53,290 INFO L93 Difference]: Finished difference Result 7656 states and 11529 transitions. [2022-11-16 19:33:53,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:33:53,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 177 [2022-11-16 19:33:53,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:53,321 INFO L225 Difference]: With dead ends: 7656 [2022-11-16 19:33:53,322 INFO L226 Difference]: Without dead ends: 4689 [2022-11-16 19:33:53,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:33:53,339 INFO L413 NwaCegarLoop]: 2232 mSDtfsCounter, 1518 mSDsluCounter, 5786 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 8018 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:53,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1522 Valid, 8018 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1175 Invalid, 2 Unknown, 0 Unchecked, 18.5s Time] [2022-11-16 19:33:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4689 states. [2022-11-16 19:33:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4689 to 4636. [2022-11-16 19:33:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 2602 states have (on average 1.313989239046887) internal successors, (3419), 2698 states have internal predecessors, (3419), 1780 states have call successors, (1780), 254 states have call predecessors, (1780), 253 states have return successors, (1795), 1729 states have call predecessors, (1795), 1779 states have call successors, (1795) [2022-11-16 19:33:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 6994 transitions. [2022-11-16 19:33:53,793 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 6994 transitions. Word has length 177 [2022-11-16 19:33:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:53,794 INFO L495 AbstractCegarLoop]: Abstraction has 4636 states and 6994 transitions. [2022-11-16 19:33:53,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-16 19:33:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 6994 transitions. [2022-11-16 19:33:53,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-16 19:33:53,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:53,808 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:53,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 19:33:53,808 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:53,809 INFO L85 PathProgramCache]: Analyzing trace with hash -987931352, now seen corresponding path program 1 times [2022-11-16 19:33:53,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:53,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742827497] [2022-11-16 19:33:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:53,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:53,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-11-16 19:33:54,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:54,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742827497] [2022-11-16 19:33:54,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742827497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:33:54,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789291476] [2022-11-16 19:33:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:54,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:54,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:54,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:54,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:33:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:56,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 4603 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 19:33:56,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-16 19:33:56,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:33:56,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789291476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:33:56,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:33:56,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-16 19:33:56,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371117905] [2022-11-16 19:33:56,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:33:56,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:33:56,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:56,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:33:56,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:33:56,471 INFO L87 Difference]: Start difference. First operand 4636 states and 6994 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 19:34:03,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:34:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:08,274 INFO L93 Difference]: Finished difference Result 10208 states and 15396 transitions. [2022-11-16 19:34:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:34:08,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 190 [2022-11-16 19:34:08,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:08,319 INFO L225 Difference]: With dead ends: 10208 [2022-11-16 19:34:08,320 INFO L226 Difference]: Without dead ends: 7241 [2022-11-16 19:34:08,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:34:08,336 INFO L413 NwaCegarLoop]: 2030 mSDtfsCounter, 1463 mSDsluCounter, 9451 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 11481 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:08,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1467 Valid, 11481 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1569 Invalid, 1 Unknown, 0 Unchecked, 11.3s Time] [2022-11-16 19:34:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7241 states. [2022-11-16 19:34:08,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7241 to 7184. [2022-11-16 19:34:08,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7184 states, 4030 states have (on average 1.3173697270471465) internal successors, (5309), 4189 states have internal predecessors, (5309), 2757 states have call successors, (2757), 394 states have call predecessors, (2757), 396 states have return successors, (2791), 2672 states have call predecessors, (2791), 2756 states have call successors, (2791) [2022-11-16 19:34:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7184 states to 7184 states and 10857 transitions. [2022-11-16 19:34:08,906 INFO L78 Accepts]: Start accepts. Automaton has 7184 states and 10857 transitions. Word has length 190 [2022-11-16 19:34:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:08,907 INFO L495 AbstractCegarLoop]: Abstraction has 7184 states and 10857 transitions. [2022-11-16 19:34:08,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 19:34:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 7184 states and 10857 transitions. [2022-11-16 19:34:08,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-16 19:34:08,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:08,929 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:08,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 19:34:09,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:09,147 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash 840279907, now seen corresponding path program 1 times [2022-11-16 19:34:09,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:09,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939760630] [2022-11-16 19:34:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:09,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-16 19:34:10,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:10,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939760630] [2022-11-16 19:34:10,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939760630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:10,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406193350] [2022-11-16 19:34:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:10,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:10,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:10,152 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:10,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:34:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:11,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 4605 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 19:34:11,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-16 19:34:11,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:11,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406193350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:11,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:34:11,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-16 19:34:11,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938985117] [2022-11-16 19:34:11,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:11,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:34:11,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:11,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:34:11,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-16 19:34:11,715 INFO L87 Difference]: Start difference. First operand 7184 states and 10857 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 19:34:13,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:34:21,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:34:24,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:24,984 INFO L93 Difference]: Finished difference Result 15322 states and 23138 transitions. [2022-11-16 19:34:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:34:24,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 191 [2022-11-16 19:34:24,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:25,043 INFO L225 Difference]: With dead ends: 15322 [2022-11-16 19:34:25,044 INFO L226 Difference]: Without dead ends: 9807 [2022-11-16 19:34:25,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:34:25,078 INFO L413 NwaCegarLoop]: 2589 mSDtfsCounter, 1434 mSDsluCounter, 11688 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 14277 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:25,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1438 Valid, 14277 Invalid, 2139 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 2136 Invalid, 2 Unknown, 0 Unchecked, 12.7s Time] [2022-11-16 19:34:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9807 states. [2022-11-16 19:34:25,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9807 to 9746. [2022-11-16 19:34:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9746 states, 5467 states have (on average 1.3184561916956283) internal successors, (7208), 5695 states have internal predecessors, (7208), 3734 states have call successors, (3734), 534 states have call predecessors, (3734), 544 states have return successors, (3792), 3614 states have call predecessors, (3792), 3733 states have call successors, (3792) [2022-11-16 19:34:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9746 states to 9746 states and 14734 transitions. [2022-11-16 19:34:25,887 INFO L78 Accepts]: Start accepts. Automaton has 9746 states and 14734 transitions. Word has length 191 [2022-11-16 19:34:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:25,888 INFO L495 AbstractCegarLoop]: Abstraction has 9746 states and 14734 transitions. [2022-11-16 19:34:25,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 19:34:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 9746 states and 14734 transitions. [2022-11-16 19:34:25,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-16 19:34:25,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:25,916 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:25,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:26,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:26,131 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:26,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1784606223, now seen corresponding path program 1 times [2022-11-16 19:34:26,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:26,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676262195] [2022-11-16 19:34:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:26,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-16 19:34:27,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:27,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676262195] [2022-11-16 19:34:27,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676262195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:27,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093450019] [2022-11-16 19:34:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:27,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:27,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:27,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:27,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:34:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:28,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 4607 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 19:34:28,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-16 19:34:28,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:28,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093450019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:28,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:34:28,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-16 19:34:28,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970355023] [2022-11-16 19:34:28,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:28,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:34:28,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:28,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:34:28,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-16 19:34:28,833 INFO L87 Difference]: Start difference. First operand 9746 states and 14734 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 19:34:30,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:34:37,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:34:40,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:34:41,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:34:44,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:34:51,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:34:52,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:34:53,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:53,633 INFO L93 Difference]: Finished difference Result 20554 states and 31046 transitions. [2022-11-16 19:34:53,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:34:53,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 192 [2022-11-16 19:34:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:53,694 INFO L225 Difference]: With dead ends: 20554 [2022-11-16 19:34:53,694 INFO L226 Difference]: Without dead ends: 12480 [2022-11-16 19:34:53,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:34:53,728 INFO L413 NwaCegarLoop]: 2656 mSDtfsCounter, 1519 mSDsluCounter, 11956 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 14612 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:53,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 14612 Invalid, 2229 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 2225 Invalid, 3 Unknown, 0 Unchecked, 24.1s Time] [2022-11-16 19:34:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12480 states. [2022-11-16 19:34:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12480 to 12381. [2022-11-16 19:34:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12381 states, 6935 states have (on average 1.3182408074981975) internal successors, (9142), 7222 states have internal predecessors, (9142), 4754 states have call successors, (4754), 679 states have call predecessors, (4754), 691 states have return successors, (4828), 4603 states have call predecessors, (4828), 4753 states have call successors, (4828) [2022-11-16 19:34:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12381 states to 12381 states and 18724 transitions. [2022-11-16 19:34:54,793 INFO L78 Accepts]: Start accepts. Automaton has 12381 states and 18724 transitions. Word has length 192 [2022-11-16 19:34:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:54,794 INFO L495 AbstractCegarLoop]: Abstraction has 12381 states and 18724 transitions. [2022-11-16 19:34:54,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 19:34:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 12381 states and 18724 transitions. [2022-11-16 19:34:54,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-11-16 19:34:54,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:54,834 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:54,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:55,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:55,049 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:55,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:55,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1098303082, now seen corresponding path program 1 times [2022-11-16 19:34:55,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:55,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476042047] [2022-11-16 19:34:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:55,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-16 19:34:55,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:55,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476042047] [2022-11-16 19:34:55,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476042047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:55,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701914874] [2022-11-16 19:34:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:55,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:55,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:55,946 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:55,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:34:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:57,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 4609 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 19:34:57,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-11-16 19:34:57,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:57,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701914874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:57,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:34:57,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-16 19:34:57,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258447991] [2022-11-16 19:34:57,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:57,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:34:57,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:57,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:34:57,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-16 19:34:57,629 INFO L87 Difference]: Start difference. First operand 12381 states and 18724 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 19:34:59,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:35:07,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:35:09,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:35:12,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:35:14,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:35:16,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:35:17,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:35:21,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:21,246 INFO L93 Difference]: Finished difference Result 25825 states and 39027 transitions. [2022-11-16 19:35:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:35:21,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 193 [2022-11-16 19:35:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:21,323 INFO L225 Difference]: With dead ends: 25825 [2022-11-16 19:35:21,323 INFO L226 Difference]: Without dead ends: 15116 [2022-11-16 19:35:21,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:35:21,365 INFO L413 NwaCegarLoop]: 2657 mSDtfsCounter, 1519 mSDsluCounter, 11960 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 14617 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:21,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 14617 Invalid, 2229 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 2225 Invalid, 3 Unknown, 0 Unchecked, 22.9s Time] [2022-11-16 19:35:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15116 states. [2022-11-16 19:35:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15116 to 12382. [2022-11-16 19:35:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12382 states, 6936 states have (on average 1.3181949250288352) internal successors, (9143), 7222 states have internal predecessors, (9143), 4754 states have call successors, (4754), 679 states have call predecessors, (4754), 691 states have return successors, (4828), 4604 states have call predecessors, (4828), 4753 states have call successors, (4828) [2022-11-16 19:35:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12382 states to 12382 states and 18725 transitions. [2022-11-16 19:35:22,531 INFO L78 Accepts]: Start accepts. Automaton has 12382 states and 18725 transitions. Word has length 193 [2022-11-16 19:35:22,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:22,535 INFO L495 AbstractCegarLoop]: Abstraction has 12382 states and 18725 transitions. [2022-11-16 19:35:22,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-16 19:35:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 12382 states and 18725 transitions. [2022-11-16 19:35:22,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-16 19:35:22,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:22,582 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-11-16 19:35:22,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:22,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:22,795 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:22,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:22,796 INFO L85 PathProgramCache]: Analyzing trace with hash 39633551, now seen corresponding path program 1 times [2022-11-16 19:35:22,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:35:22,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360059731] [2022-11-16 19:35:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:22,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:35:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 19:35:23,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:35:23,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360059731] [2022-11-16 19:35:23,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360059731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:35:23,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:35:23,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:35:23,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973865200] [2022-11-16 19:35:23,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:35:23,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:35:23,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:35:23,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:35:23,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:35:23,139 INFO L87 Difference]: Start difference. First operand 12382 states and 18725 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-16 19:35:24,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:35:30,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:35:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:30,673 INFO L93 Difference]: Finished difference Result 32762 states and 49432 transitions. [2022-11-16 19:35:30,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:35:30,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 205 [2022-11-16 19:35:30,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:30,798 INFO L225 Difference]: With dead ends: 32762 [2022-11-16 19:35:30,798 INFO L226 Difference]: Without dead ends: 20399 [2022-11-16 19:35:30,855 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 [2022-11-16 19:35:30,856 INFO L413 NwaCegarLoop]: 1714 mSDtfsCounter, 1429 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 3026 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:30,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1429 Valid, 3026 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 414 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2022-11-16 19:35:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20399 states. [2022-11-16 19:35:32,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20399 to 20336. [2022-11-16 19:35:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20336 states, 11372 states have (on average 1.3119064368624693) internal successors, (14919), 11866 states have internal predecessors, (14919), 7812 states have call successors, (7812), 1128 states have call predecessors, (7812), 1151 states have return successors, (7926), 7555 states have call predecessors, (7926), 7811 states have call successors, (7926) [2022-11-16 19:35:32,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20336 states to 20336 states and 30657 transitions. [2022-11-16 19:35:32,742 INFO L78 Accepts]: Start accepts. Automaton has 20336 states and 30657 transitions. Word has length 205 [2022-11-16 19:35:32,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:32,743 INFO L495 AbstractCegarLoop]: Abstraction has 20336 states and 30657 transitions. [2022-11-16 19:35:32,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-16 19:35:32,744 INFO L276 IsEmpty]: Start isEmpty. Operand 20336 states and 30657 transitions. [2022-11-16 19:35:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-16 19:35:32,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:32,773 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-11-16 19:35:32,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 19:35:32,773 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:32,774 INFO L85 PathProgramCache]: Analyzing trace with hash 29247077, now seen corresponding path program 1 times [2022-11-16 19:35:32,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:35:32,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854053301] [2022-11-16 19:35:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:32,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:35:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 19:35:33,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:35:33,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854053301] [2022-11-16 19:35:33,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854053301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:35:33,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:35:33,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:35:33,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124605560] [2022-11-16 19:35:33,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:35:33,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:35:33,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:35:33,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:35:33,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:35:33,104 INFO L87 Difference]: Start difference. First operand 20336 states and 30657 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-16 19:35:34,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:35:37,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:35:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:40,118 INFO L93 Difference]: Finished difference Result 53920 states and 81067 transitions. [2022-11-16 19:35:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:35:40,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 205 [2022-11-16 19:35:40,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:40,309 INFO L225 Difference]: With dead ends: 53920 [2022-11-16 19:35:40,309 INFO L226 Difference]: Without dead ends: 33603 [2022-11-16 19:35:40,406 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 [2022-11-16 19:35:40,407 INFO L413 NwaCegarLoop]: 1791 mSDtfsCounter, 1326 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 3103 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:40,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1326 Valid, 3103 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 430 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-16 19:35:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33603 states. [2022-11-16 19:35:42,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33603 to 33590. [2022-11-16 19:35:42,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33590 states, 18868 states have (on average 1.3070807716769133) internal successors, (24662), 19624 states have internal predecessors, (24662), 12774 states have call successors, (12774), 1902 states have call predecessors, (12774), 1947 states have return successors, (12965), 12398 states have call predecessors, (12965), 12773 states have call successors, (12965) [2022-11-16 19:35:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33590 states to 33590 states and 50401 transitions. [2022-11-16 19:35:42,660 INFO L78 Accepts]: Start accepts. Automaton has 33590 states and 50401 transitions. Word has length 205 [2022-11-16 19:35:42,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:42,660 INFO L495 AbstractCegarLoop]: Abstraction has 33590 states and 50401 transitions. [2022-11-16 19:35:42,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-16 19:35:42,661 INFO L276 IsEmpty]: Start isEmpty. Operand 33590 states and 50401 transitions. [2022-11-16 19:35:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-16 19:35:42,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:42,673 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 19:35:42,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 19:35:42,673 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:35:42,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:42,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1693173289, now seen corresponding path program 1 times [2022-11-16 19:35:42,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:35:42,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645543262] [2022-11-16 19:35:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:42,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:35:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-16 19:35:43,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:35:43,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645543262] [2022-11-16 19:35:43,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645543262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:35:43,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896304962] [2022-11-16 19:35:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:43,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:43,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:35:43,811 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:35:43,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91f58695-76e8-496f-8d5e-489c1c2f83bf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:35:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:45,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 4676 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 19:35:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-16 19:35:45,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-16 19:35:46,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896304962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:46,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [56919137] [2022-11-16 19:35:46,385 INFO L159 IcfgInterpreter]: Started Sifa with 118 locations of interest [2022-11-16 19:35:46,386 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:35:46,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:35:46,397 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:35:46,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:35:55,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:55,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:55,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:56,860 INFO L217 Elim1Store]: Index analysis took 2867 ms