./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:40:57,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:40:57,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:40:57,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:40:57,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:40:57,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:40:57,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:40:57,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:40:57,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:40:57,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:40:57,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:40:57,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:40:57,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:40:57,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:40:57,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:40:57,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:40:57,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:40:57,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:40:57,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:40:57,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:40:57,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:40:57,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:40:57,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:40:57,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:40:57,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:40:57,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:40:57,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:40:57,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:40:57,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:40:57,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:40:57,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:40:57,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:40:57,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:40:57,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:40:57,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:40:57,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:40:57,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:40:57,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:40:57,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:40:57,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:40:57,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:40:57,772 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:40:57,799 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:40:57,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:40:57,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:40:57,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:40:57,801 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:40:57,801 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:40:57,802 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:40:57,802 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:40:57,802 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:40:57,802 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:40:57,803 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:40:57,803 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:40:57,803 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:40:57,804 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:40:57,804 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:40:57,804 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:40:57,805 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:40:57,805 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:40:57,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:40:57,806 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:40:57,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:40:57,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:40:57,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:40:57,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:40:57,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:40:57,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:40:57,808 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:40:57,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:40:57,808 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:40:57,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:40:57,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:40:57,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:40:57,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:40:57,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:40:57,810 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:40:57,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:40:57,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:40:57,811 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:40:57,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:40:57,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:40:57,812 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:40:57,812 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_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 [2022-11-03 02:40:58,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:40:58,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:40:58,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:40:58,233 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:40:58,234 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:40:58,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2022-11-03 02:40:58,318 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/data/2e3bce6cd/fba42226d83241bb9ae3e548925df98d/FLAG01474889e [2022-11-03 02:40:59,196 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:40:59,197 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2022-11-03 02:40:59,226 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/data/2e3bce6cd/fba42226d83241bb9ae3e548925df98d/FLAG01474889e [2022-11-03 02:40:59,300 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/data/2e3bce6cd/fba42226d83241bb9ae3e548925df98d [2022-11-03 02:40:59,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:40:59,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:40:59,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:40:59,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:40:59,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:40:59,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:40:59" (1/1) ... [2022-11-03 02:40:59,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f1f6f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:59, skipping insertion in model container [2022-11-03 02:40:59,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:40:59" (1/1) ... [2022-11-03 02:40:59,326 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:40:59,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:40:59,987 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2022-11-03 02:41:00,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:00,345 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:41:00,405 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2022-11-03 02:41:00,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:41:00,689 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:41:00,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:00 WrapperNode [2022-11-03 02:41:00,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:41:00,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:00,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:41:00,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:41:00,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:00" (1/1) ... [2022-11-03 02:41:00,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:00" (1/1) ... [2022-11-03 02:41:01,120 INFO L138 Inliner]: procedures = 177, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2467 [2022-11-03 02:41:01,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:41:01,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:41:01,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:41:01,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:41:01,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:00" (1/1) ... [2022-11-03 02:41:01,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:00" (1/1) ... [2022-11-03 02:41:01,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:00" (1/1) ... [2022-11-03 02:41:01,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:00" (1/1) ... [2022-11-03 02:41:01,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:00" (1/1) ... [2022-11-03 02:41:01,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:00" (1/1) ... [2022-11-03 02:41:01,343 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:00" (1/1) ... [2022-11-03 02:41:01,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:00" (1/1) ... [2022-11-03 02:41:01,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:41:01,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:41:01,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:41:01,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:41:01,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:00" (1/1) ... [2022-11-03 02:41:01,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:41:01,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:01,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:41:01,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:41:01,505 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-11-03 02:41:01,505 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-11-03 02:41:01,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:41:01,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:41:01,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:41:01,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:41:01,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:41:01,507 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:41:01,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:41:01,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:41:01,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:41:01,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:41:01,508 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 02:41:01,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:41:01,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:41:01,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:41:01,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:41:01,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:41:01,948 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:41:01,951 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:41:06,000 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:41:07,192 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:41:07,192 INFO L300 CfgBuilder]: Removed 168 assume(true) statements. [2022-11-03 02:41:07,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:07 BoogieIcfgContainer [2022-11-03 02:41:07,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:41:07,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:41:07,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:41:07,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:41:07,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:40:59" (1/3) ... [2022-11-03 02:41:07,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e124625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:07, skipping insertion in model container [2022-11-03 02:41:07,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:41:00" (2/3) ... [2022-11-03 02:41:07,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e124625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:41:07, skipping insertion in model container [2022-11-03 02:41:07,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:41:07" (3/3) ... [2022-11-03 02:41:07,210 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test10-3.i [2022-11-03 02:41:07,239 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:41:07,240 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:41:07,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:41:07,365 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;@209c1b0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:41:07,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:41:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 258 states have (on average 1.8255813953488371) internal successors, (471), 263 states have internal predecessors, (471), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-03 02:41:07,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:41:07,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:07,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:07,393 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:07,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:07,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1192354420, now seen corresponding path program 1 times [2022-11-03 02:41:07,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:07,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495364360] [2022-11-03 02:41:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:07,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:07,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:07,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495364360] [2022-11-03 02:41:07,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495364360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:07,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:07,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:41:07,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418661590] [2022-11-03 02:41:07,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:07,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:41:07,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:07,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:41:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:41:07,799 INFO L87 Difference]: Start difference. First operand has 277 states, 258 states have (on average 1.8255813953488371) internal successors, (471), 263 states have internal predecessors, (471), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:08,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:08,768 INFO L93 Difference]: Finished difference Result 553 states and 1005 transitions. [2022-11-03 02:41:08,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:41:08,780 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 02:41:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:08,794 INFO L225 Difference]: With dead ends: 553 [2022-11-03 02:41:08,800 INFO L226 Difference]: Without dead ends: 249 [2022-11-03 02:41:08,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:41:08,810 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:08,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 298 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:41:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-03 02:41:08,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-11-03 02:41:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 231 states have (on average 1.199134199134199) internal successors, (277), 236 states have internal predecessors, (277), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-03 02:41:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 304 transitions. [2022-11-03 02:41:08,927 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 304 transitions. Word has length 12 [2022-11-03 02:41:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:08,928 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 304 transitions. [2022-11-03 02:41:08,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 304 transitions. [2022-11-03 02:41:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:41:08,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:08,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:08,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:41:08,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:08,936 INFO L85 PathProgramCache]: Analyzing trace with hash 989100517, now seen corresponding path program 1 times [2022-11-03 02:41:08,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:08,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99753552] [2022-11-03 02:41:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:08,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:09,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:09,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99753552] [2022-11-03 02:41:09,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99753552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:09,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:09,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:41:09,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133443584] [2022-11-03 02:41:09,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:09,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:09,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:09,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:09,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:09,587 INFO L87 Difference]: Start difference. First operand 249 states and 304 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:13,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:41:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:13,999 INFO L93 Difference]: Finished difference Result 425 states and 521 transitions. [2022-11-03 02:41:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:41:14,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-03 02:41:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:14,002 INFO L225 Difference]: With dead ends: 425 [2022-11-03 02:41:14,002 INFO L226 Difference]: Without dead ends: 276 [2022-11-03 02:41:14,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:14,005 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 27 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:14,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 762 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 02:41:14,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-03 02:41:14,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 251. [2022-11-03 02:41:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 233 states have (on average 1.1974248927038627) internal successors, (279), 238 states have internal predecessors, (279), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-03 02:41:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 306 transitions. [2022-11-03 02:41:14,025 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 306 transitions. Word has length 24 [2022-11-03 02:41:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:14,026 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 306 transitions. [2022-11-03 02:41:14,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 306 transitions. [2022-11-03 02:41:14,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:41:14,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:14,029 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:41:14,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:41:14,030 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:14,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:14,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1975886730, now seen corresponding path program 1 times [2022-11-03 02:41:14,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:14,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034008812] [2022-11-03 02:41:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:14,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:14,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:41:14,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862814821] [2022-11-03 02:41:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:14,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:14,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:14,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:14,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:41:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:15,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:41:15,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:41:15,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:15,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:15,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034008812] [2022-11-03 02:41:15,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:41:15,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862814821] [2022-11-03 02:41:15,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862814821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:15,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:15,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:41:15,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994178448] [2022-11-03 02:41:15,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:15,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:15,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:15,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:15,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:15,617 INFO L87 Difference]: Start difference. First operand 251 states and 306 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:17,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:41:19,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:41:19,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:19,772 INFO L93 Difference]: Finished difference Result 614 states and 746 transitions. [2022-11-03 02:41:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-03 02:41:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:19,775 INFO L225 Difference]: With dead ends: 614 [2022-11-03 02:41:19,776 INFO L226 Difference]: Without dead ends: 366 [2022-11-03 02:41:19,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:19,779 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 119 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:19,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 543 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-03 02:41:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-11-03 02:41:19,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 362. [2022-11-03 02:41:19,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 339 states have (on average 1.1799410029498525) internal successors, (400), 344 states have internal predecessors, (400), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-03 02:41:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 437 transitions. [2022-11-03 02:41:19,804 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 437 transitions. Word has length 49 [2022-11-03 02:41:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:19,805 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 437 transitions. [2022-11-03 02:41:19,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:41:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 437 transitions. [2022-11-03 02:41:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 02:41:19,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:19,808 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:41:19,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:41:20,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:20,023 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:20,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:20,024 INFO L85 PathProgramCache]: Analyzing trace with hash 879389578, now seen corresponding path program 1 times [2022-11-03 02:41:20,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:20,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495673848] [2022-11-03 02:41:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:20,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:20,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:41:20,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882435909] [2022-11-03 02:41:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:20,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:20,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:20,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:20,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:41:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:21,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:41:21,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:21,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:41:21,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:41:21,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:41:21,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 02:41:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:41:21,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:21,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:21,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495673848] [2022-11-03 02:41:21,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:41:21,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882435909] [2022-11-03 02:41:21,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882435909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:21,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:21,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:41:21,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562941966] [2022-11-03 02:41:21,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:21,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:21,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:21,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:21,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:21,380 INFO L87 Difference]: Start difference. First operand 362 states and 437 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:41:27,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:41:27,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:27,180 INFO L93 Difference]: Finished difference Result 674 states and 815 transitions. [2022-11-03 02:41:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:41:27,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 62 [2022-11-03 02:41:27,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:27,183 INFO L225 Difference]: With dead ends: 674 [2022-11-03 02:41:27,183 INFO L226 Difference]: Without dead ends: 362 [2022-11-03 02:41:27,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:27,186 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 12 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:27,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 762 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-03 02:41:27,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-03 02:41:27,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2022-11-03 02:41:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 339 states have (on average 1.176991150442478) internal successors, (399), 344 states have internal predecessors, (399), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-03 02:41:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 436 transitions. [2022-11-03 02:41:27,208 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 436 transitions. Word has length 62 [2022-11-03 02:41:27,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:27,208 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 436 transitions. [2022-11-03 02:41:27,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:41:27,209 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 436 transitions. [2022-11-03 02:41:27,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:41:27,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:27,212 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:27,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:27,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:27,427 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:27,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:27,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1466373685, now seen corresponding path program 1 times [2022-11-03 02:41:27,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:27,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074353451] [2022-11-03 02:41:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:27,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:27,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:41:27,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212695956] [2022-11-03 02:41:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:27,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:27,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:27,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:27,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:41:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:29,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 2300 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:41:29,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:41:29,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:29,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:29,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074353451] [2022-11-03 02:41:29,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:41:29,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212695956] [2022-11-03 02:41:29,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212695956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:29,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:29,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:41:29,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964370189] [2022-11-03 02:41:29,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:29,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:41:29,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:29,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:41:29,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:29,369 INFO L87 Difference]: Start difference. First operand 362 states and 436 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:41:32,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:41:33,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:41:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:34,498 INFO L93 Difference]: Finished difference Result 820 states and 988 transitions. [2022-11-03 02:41:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:41:34,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2022-11-03 02:41:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:34,502 INFO L225 Difference]: With dead ends: 820 [2022-11-03 02:41:34,502 INFO L226 Difference]: Without dead ends: 484 [2022-11-03 02:41:34,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:41:34,504 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 110 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:34,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 527 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-03 02:41:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-03 02:41:34,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 429. [2022-11-03 02:41:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 403 states have (on average 1.1687344913151365) internal successors, (471), 408 states have internal predecessors, (471), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-03 02:41:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 514 transitions. [2022-11-03 02:41:34,533 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 514 transitions. Word has length 83 [2022-11-03 02:41:34,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:34,534 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 514 transitions. [2022-11-03 02:41:34,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:41:34,534 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 514 transitions. [2022-11-03 02:41:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-03 02:41:34,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:34,538 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:34,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:34,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:34,751 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:34,751 INFO L85 PathProgramCache]: Analyzing trace with hash 2009173670, now seen corresponding path program 1 times [2022-11-03 02:41:34,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:34,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085499422] [2022-11-03 02:41:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:34,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:34,898 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:41:34,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648680373] [2022-11-03 02:41:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:34,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:34,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:34,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:34,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:41:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:41:36,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:41:36,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:41:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:41:36,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:41:36,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:36,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085499422] [2022-11-03 02:41:36,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:41:36,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648680373] [2022-11-03 02:41:36,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648680373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:41:36,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:41:36,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:41:36,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854070472] [2022-11-03 02:41:36,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:41:36,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:41:36,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:41:36,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:41:36,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:41:36,412 INFO L87 Difference]: Start difference. First operand 429 states and 514 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:41:38,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:41:38,256 INFO L93 Difference]: Finished difference Result 719 states and 867 transitions. [2022-11-03 02:41:38,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:41:38,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 96 [2022-11-03 02:41:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:41:38,259 INFO L225 Difference]: With dead ends: 719 [2022-11-03 02:41:38,260 INFO L226 Difference]: Without dead ends: 351 [2022-11-03 02:41:38,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:41:38,261 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 438 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:41:38,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 329 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:41:38,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-03 02:41:38,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2022-11-03 02:41:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 330 states have (on average 1.1666666666666667) internal successors, (385), 335 states have internal predecessors, (385), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-03 02:41:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 418 transitions. [2022-11-03 02:41:38,287 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 418 transitions. Word has length 96 [2022-11-03 02:41:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:41:38,288 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 418 transitions. [2022-11-03 02:41:38,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:41:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 418 transitions. [2022-11-03 02:41:38,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-03 02:41:38,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:41:38,291 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:41:38,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:41:38,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:38,508 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:41:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:41:38,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1698726905, now seen corresponding path program 1 times [2022-11-03 02:41:38,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:41:38,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845630367] [2022-11-03 02:41:38,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:38,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:41:38,643 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:41:38,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391286821] [2022-11-03 02:41:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:41:38,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:41:38,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:41:38,646 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:41:38,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:50:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:02,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 1463 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:50:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:50:02,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:02,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:02,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845630367] [2022-11-03 02:50:02,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:50:02,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391286821] [2022-11-03 02:50:02,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391286821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:02,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:02,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:50:02,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508240297] [2022-11-03 02:50:02,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:02,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:50:02,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:02,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:50:02,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:50:02,597 INFO L87 Difference]: Start difference. First operand 351 states and 418 transitions. Second operand has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:50:06,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:06,933 INFO L93 Difference]: Finished difference Result 684 states and 823 transitions. [2022-11-03 02:50:06,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:50:06,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 103 [2022-11-03 02:50:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:06,936 INFO L225 Difference]: With dead ends: 684 [2022-11-03 02:50:06,937 INFO L226 Difference]: Without dead ends: 353 [2022-11-03 02:50:06,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:50:06,939 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 1 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:06,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 806 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-03 02:50:06,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-03 02:50:06,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-11-03 02:50:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 331 states have (on average 1.1691842900302114) internal successors, (387), 337 states have internal predecessors, (387), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-03 02:50:06,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 423 transitions. [2022-11-03 02:50:06,965 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 423 transitions. Word has length 103 [2022-11-03 02:50:06,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:06,966 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 423 transitions. [2022-11-03 02:50:06,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-03 02:50:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 423 transitions. [2022-11-03 02:50:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 02:50:06,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:06,971 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:07,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 02:50:07,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:07,187 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:07,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:07,187 INFO L85 PathProgramCache]: Analyzing trace with hash -636857137, now seen corresponding path program 1 times [2022-11-03 02:50:07,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:07,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723319414] [2022-11-03 02:50:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:07,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:07,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:50:07,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488124607] [2022-11-03 02:50:07,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:07,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:07,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:07,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:07,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17d22d19-5b25-44f3-8729-14a2201f557d/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process