./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/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_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/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_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/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 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 --- 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 01:59:36,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:59:36,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:59:36,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:59:36,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:59:36,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:59:36,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:59:36,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:59:36,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:59:36,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:59:36,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:59:36,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:59:36,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:59:36,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:59:36,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:59:36,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:59:36,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:59:36,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:59:36,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:59:36,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:59:36,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:59:36,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:59:36,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:59:36,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:59:36,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:59:36,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:59:36,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:59:36,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:59:36,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:59:36,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:59:36,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:59:36,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:59:36,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:59:36,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:59:36,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:59:36,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:59:36,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:59:36,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:59:36,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:59:36,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:59:36,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:59:36,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:59:36,828 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:59:36,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:59:36,829 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:59:36,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:59:36,831 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:59:36,831 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:59:36,831 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:59:36,831 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:59:36,832 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:59:36,832 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:59:36,832 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:59:36,833 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:59:36,833 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:59:36,833 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:59:36,833 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:59:36,834 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:59:36,834 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:59:36,834 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:59:36,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:59:36,835 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:59:36,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:59:36,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:59:36,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:59:36,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:59:36,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:59:36,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:59:36,837 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:59:36,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:59:36,838 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:59:36,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:59:36,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:59:36,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:59:36,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:59:36,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:59:36,839 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:59:36,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:59:36,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:59:36,840 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:59:36,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:59:36,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:59:36,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:59:36,841 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_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 [2022-11-03 01:59:37,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:59:37,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:59:37,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:59:37,277 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:59:37,278 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:59:37,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2022-11-03 01:59:37,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/data/f9efb1848/650e2433a82b4996bea37e04bd8c0fb1/FLAG1a11ff2e5 [2022-11-03 01:59:37,920 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:59:37,921 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2022-11-03 01:59:37,930 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/data/f9efb1848/650e2433a82b4996bea37e04bd8c0fb1/FLAG1a11ff2e5 [2022-11-03 01:59:38,237 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/data/f9efb1848/650e2433a82b4996bea37e04bd8c0fb1 [2022-11-03 01:59:38,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:59:38,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:59:38,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:59:38,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:59:38,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:59:38,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:59:38" (1/1) ... [2022-11-03 01:59:38,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77aa74fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38, skipping insertion in model container [2022-11-03 01:59:38,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:59:38" (1/1) ... [2022-11-03 01:59:38,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:59:38,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:59:38,505 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_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c[324,337] [2022-11-03 01:59:38,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:59:38,545 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:59:38,563 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_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c[324,337] [2022-11-03 01:59:38,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:59:38,594 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:59:38,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38 WrapperNode [2022-11-03 01:59:38,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:59:38,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:59:38,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:59:38,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:59:38,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38" (1/1) ... [2022-11-03 01:59:38,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38" (1/1) ... [2022-11-03 01:59:38,655 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2022-11-03 01:59:38,655 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:59:38,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:59:38,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:59:38,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:59:38,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38" (1/1) ... [2022-11-03 01:59:38,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38" (1/1) ... [2022-11-03 01:59:38,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38" (1/1) ... [2022-11-03 01:59:38,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38" (1/1) ... [2022-11-03 01:59:38,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38" (1/1) ... [2022-11-03 01:59:38,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38" (1/1) ... [2022-11-03 01:59:38,707 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38" (1/1) ... [2022-11-03 01:59:38,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38" (1/1) ... [2022-11-03 01:59:38,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:59:38,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:59:38,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:59:38,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:59:38,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38" (1/1) ... [2022-11-03 01:59:38,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:59:38,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:38,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:59:38,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:59:38,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:59:38,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:59:38,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:59:38,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:59:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:59:38,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:59:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:59:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:59:38,928 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:59:38,931 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:59:39,109 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:59:39,185 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:59:39,186 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 01:59:39,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:59:39 BoogieIcfgContainer [2022-11-03 01:59:39,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:59:39,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:59:39,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:59:39,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:59:39,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:59:38" (1/3) ... [2022-11-03 01:59:39,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd6e9c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:59:39, skipping insertion in model container [2022-11-03 01:59:39,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:59:38" (2/3) ... [2022-11-03 01:59:39,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd6e9c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:59:39, skipping insertion in model container [2022-11-03 01:59:39,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:59:39" (3/3) ... [2022-11-03 01:59:39,212 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2022-11-03 01:59:39,235 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:59:39,235 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:59:39,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:59:39,307 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;@58b6a00e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:59:39,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:59:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:39,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:59:39,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:39,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:39,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:39,333 INFO L85 PathProgramCache]: Analyzing trace with hash -877487072, now seen corresponding path program 1 times [2022-11-03 01:59:39,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:39,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770945172] [2022-11-03 01:59:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:39,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:39,759 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 01:59:39,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:39,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770945172] [2022-11-03 01:59:39,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770945172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:39,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:39,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:59:39,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947851759] [2022-11-03 01:59:39,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:39,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:59:39,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:39,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:59:39,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:39,858 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:39,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:39,960 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2022-11-03 01:59:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:59:39,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 01:59:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:39,978 INFO L225 Difference]: With dead ends: 25 [2022-11-03 01:59:39,979 INFO L226 Difference]: Without dead ends: 12 [2022-11-03 01:59:39,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 01:59:40,016 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:40,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:59:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-03 01:59:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-03 01:59:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-03 01:59:40,060 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2022-11-03 01:59:40,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:40,060 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-03 01:59:40,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-03 01:59:40,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:59:40,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:40,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:40,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:59:40,065 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:40,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:40,067 INFO L85 PathProgramCache]: Analyzing trace with hash -406856743, now seen corresponding path program 1 times [2022-11-03 01:59:40,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:40,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075844197] [2022-11-03 01:59:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:40,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:59:40,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:40,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075844197] [2022-11-03 01:59:40,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075844197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:40,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:40,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:59:40,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806315560] [2022-11-03 01:59:40,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:40,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:59:40,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:40,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:59:40,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:59:40,260 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:40,302 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2022-11-03 01:59:40,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:59:40,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 01:59:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:40,303 INFO L225 Difference]: With dead ends: 21 [2022-11-03 01:59:40,303 INFO L226 Difference]: Without dead ends: 13 [2022-11-03 01:59:40,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:59:40,306 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:40,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 15 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:59:40,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-03 01:59:40,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-03 01:59:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2022-11-03 01:59:40,313 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 9 [2022-11-03 01:59:40,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:40,313 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2022-11-03 01:59:40,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,314 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2022-11-03 01:59:40,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 01:59:40,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:40,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:40,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:59:40,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:40,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:40,316 INFO L85 PathProgramCache]: Analyzing trace with hash -132400547, now seen corresponding path program 1 times [2022-11-03 01:59:40,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:40,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551890131] [2022-11-03 01:59:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:40,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:59:40,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:40,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551890131] [2022-11-03 01:59:40,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551890131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:59:40,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:59:40,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:59:40,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074995586] [2022-11-03 01:59:40,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:59:40,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:59:40,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:40,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:59:40,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:40,373 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:40,402 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2022-11-03 01:59:40,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:59:40,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 01:59:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:40,403 INFO L225 Difference]: With dead ends: 19 [2022-11-03 01:59:40,404 INFO L226 Difference]: Without dead ends: 13 [2022-11-03 01:59:40,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:59:40,406 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:40,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:59:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-03 01:59:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-03 01:59:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-03 01:59:40,412 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2022-11-03 01:59:40,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:40,412 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-03 01:59:40,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-03 01:59:40,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:59:40,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:40,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:40,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:59:40,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:40,415 INFO L85 PathProgramCache]: Analyzing trace with hash -199416727, now seen corresponding path program 1 times [2022-11-03 01:59:40,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:40,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217788131] [2022-11-03 01:59:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:40,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:59:40,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:40,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217788131] [2022-11-03 01:59:40,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217788131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:40,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79260104] [2022-11-03 01:59:40,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:40,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:40,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:40,742 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:40,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:59:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:40,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:59:40,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:59:40,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:59:41,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79260104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:41,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1164479937] [2022-11-03 01:59:41,081 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:59:41,081 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:41,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:59:41,092 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:59:41,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:59:41,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:41,232 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 01:59:41,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 01:59:41,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:41,336 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:59:41,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:59:41,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:41,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:59:41,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:41,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:41,707 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:59:41,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 228 [2022-11-03 01:59:41,882 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 16 treesize of output 12 [2022-11-03 01:59:42,039 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:59:42,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '241#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~x~0#1| 4) |ULTIMATE.start_main_~#vectorx~0#1.offset|))) (not (= |ULTIMATE.start_main_~found~0#1| 0)) (= 100000 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~#vectorx~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (= (ite (not (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_~element~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~pos~0#1| |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= |ULTIMATE.start_main_~found~0#1| 1) (<= 0 |#StackHeapBarrier|) (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|)) (= |#NULL.base| 0))' at error location [2022-11-03 01:59:42,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:59:42,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:42,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-11-03 01:59:42,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151778344] [2022-11-03 01:59:42,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:42,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 01:59:42,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:42,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 01:59:42,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-03 01:59:42,695 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:43,035 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2022-11-03 01:59:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:59:43,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 01:59:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:43,037 INFO L225 Difference]: With dead ends: 49 [2022-11-03 01:59:43,037 INFO L226 Difference]: Without dead ends: 39 [2022-11-03 01:59:43,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:59:43,039 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:43,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 40 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:59:43,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-03 01:59:43,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 21. [2022-11-03 01:59:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-03 01:59:43,049 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2022-11-03 01:59:43,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:43,050 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-03 01:59:43,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:43,050 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-03 01:59:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:59:43,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:43,051 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:43,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:43,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:43,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:43,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1322625542, now seen corresponding path program 2 times [2022-11-03 01:59:43,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:43,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119600831] [2022-11-03 01:59:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:43,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 01:59:43,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:43,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119600831] [2022-11-03 01:59:43,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119600831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:43,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134049702] [2022-11-03 01:59:43,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:59:43,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:43,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:43,475 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:43,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:59:43,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:59:43,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:59:43,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:59:43,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:43,711 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 38 treesize of output 22 [2022-11-03 01:59:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:59:43,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:59:43,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134049702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:43,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101121730] [2022-11-03 01:59:43,914 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:59:43,914 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:43,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:59:43,915 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:59:43,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:59:43,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:43,997 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:59:43,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:59:44,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:44,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2022-11-03 01:59:44,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:44,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:59:44,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:44,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:44,205 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:59:44,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 229 [2022-11-03 01:59:44,355 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 16 treesize of output 12 [2022-11-03 01:59:44,470 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:59:45,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '468#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~x~0#1| 4) |ULTIMATE.start_main_~#vectorx~0#1.offset|))) (not (= |ULTIMATE.start_main_~found~0#1| 0)) (= 100000 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~#vectorx~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (= (ite (not (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_~element~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~pos~0#1| |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= 0 |#StackHeapBarrier|) (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|)) (= |#NULL.base| 0))' at error location [2022-11-03 01:59:45,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:59:45,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:45,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-11-03 01:59:45,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543171540] [2022-11-03 01:59:45,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:45,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:59:45,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:45,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:59:45,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2022-11-03 01:59:45,020 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:45,537 INFO L93 Difference]: Finished difference Result 72 states and 97 transitions. [2022-11-03 01:59:45,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:59:45,538 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 01:59:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:45,541 INFO L225 Difference]: With dead ends: 72 [2022-11-03 01:59:45,541 INFO L226 Difference]: Without dead ends: 57 [2022-11-03 01:59:45,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 01:59:45,543 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 86 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:45,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 18 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:59:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-03 01:59:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2022-11-03 01:59:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-03 01:59:45,556 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 15 [2022-11-03 01:59:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:45,556 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-03 01:59:45,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-03 01:59:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 01:59:45,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:45,558 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:45,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:45,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:45,774 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:45,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:45,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1505374954, now seen corresponding path program 1 times [2022-11-03 01:59:45,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:45,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956302981] [2022-11-03 01:59:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:45,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:59:45,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:45,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956302981] [2022-11-03 01:59:45,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956302981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:45,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199423699] [2022-11-03 01:59:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:45,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:45,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:45,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:46,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:59:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:46,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:59:46,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:59:46,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:59:46,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199423699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:46,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744261593] [2022-11-03 01:59:46,438 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:59:46,438 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:46,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:59:46,439 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:59:46,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:59:46,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:46,503 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:59:46,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:59:46,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:46,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2022-11-03 01:59:46,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:46,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:59:46,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:46,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:46,662 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:59:46,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 228 [2022-11-03 01:59:46,750 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 16 treesize of output 12 [2022-11-03 01:59:46,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 01:59:46,898 INFO L356 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-11-03 01:59:46,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 120 [2022-11-03 01:59:46,963 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 11 iterations. Over-approximation may be very coarse. [2022-11-03 01:59:46,965 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 11 iterations. Over-approximation may be very coarse. [2022-11-03 01:59:46,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 01:59:47,001 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:59:47,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '812#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~x~0#1| 4) |ULTIMATE.start_main_~#vectorx~0#1.offset|))) (not (= |ULTIMATE.start_main_~found~0#1| 0)) (= 100000 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~#vectorx~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (= (ite (not (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_~element~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~pos~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= |ULTIMATE.start_main_~found~0#1| 1) (<= 0 |#StackHeapBarrier|) (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|)) (= |#NULL.base| 0))' at error location [2022-11-03 01:59:47,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:59:47,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:47,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-11-03 01:59:47,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049769382] [2022-11-03 01:59:47,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:47,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 01:59:47,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:47,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 01:59:47,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=780, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 01:59:47,425 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:47,562 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2022-11-03 01:59:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:59:47,566 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 01:59:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:47,569 INFO L225 Difference]: With dead ends: 76 [2022-11-03 01:59:47,570 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 01:59:47,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=780, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 01:59:47,575 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:47,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:59:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 01:59:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-11-03 01:59:47,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-11-03 01:59:47,605 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 20 [2022-11-03 01:59:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:47,605 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-11-03 01:59:47,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-11-03 01:59:47,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 01:59:47,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:47,619 INFO L195 NwaCegarLoop]: trace histogram [16, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:47,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:47,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:47,826 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:47,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:47,826 INFO L85 PathProgramCache]: Analyzing trace with hash -511155505, now seen corresponding path program 2 times [2022-11-03 01:59:47,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:47,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546761680] [2022-11-03 01:59:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:47,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 01:59:48,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:48,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546761680] [2022-11-03 01:59:48,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546761680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:48,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371370709] [2022-11-03 01:59:48,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:59:48,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:48,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:48,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:48,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:59:48,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:59:48,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:59:48,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 01:59:48,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:48,615 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 38 treesize of output 22 [2022-11-03 01:59:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-03 01:59:48,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-03 01:59:48,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371370709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:48,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [62126276] [2022-11-03 01:59:48,942 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:59:48,943 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:48,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:59:48,943 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:59:48,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:59:48,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,025 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:59:49,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:59:49,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2022-11-03 01:59:49,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:59:49,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:49,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:49,223 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:59:49,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 229 [2022-11-03 01:59:49,350 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 16 treesize of output 12 [2022-11-03 01:59:49,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 01:59:49,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 84 [2022-11-03 01:59:49,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 01:59:49,564 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:59:50,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1226#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~x~0#1| 4) |ULTIMATE.start_main_~#vectorx~0#1.offset|))) (not (= |ULTIMATE.start_main_~found~0#1| 0)) (= 100000 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~#vectorx~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (= (ite (not (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_~element~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~pos~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= |ULTIMATE.start_main_~found~0#1| 1) (<= 0 |#StackHeapBarrier|) (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|)) (= |#NULL.base| 0))' at error location [2022-11-03 01:59:50,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:59:50,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:50,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 30 [2022-11-03 01:59:50,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020706520] [2022-11-03 01:59:50,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:50,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 01:59:50,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:50,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 01:59:50,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 01:59:50,109 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:52,230 INFO L93 Difference]: Finished difference Result 140 states and 199 transitions. [2022-11-03 01:59:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-03 01:59:52,231 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-03 01:59:52,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:52,232 INFO L225 Difference]: With dead ends: 140 [2022-11-03 01:59:52,232 INFO L226 Difference]: Without dead ends: 115 [2022-11-03 01:59:52,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1643, Invalid=4363, Unknown=0, NotChecked=0, Total=6006 [2022-11-03 01:59:52,236 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 108 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:52,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 30 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:59:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-03 01:59:52,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 74. [2022-11-03 01:59:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2022-11-03 01:59:52,261 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 29 [2022-11-03 01:59:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:52,261 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2022-11-03 01:59:52,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:59:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2022-11-03 01:59:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 01:59:52,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:52,263 INFO L195 NwaCegarLoop]: trace histogram [21, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:59:52,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:52,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 01:59:52,490 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:59:52,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:52,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1945885005, now seen corresponding path program 3 times [2022-11-03 01:59:52,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:52,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027099573] [2022-11-03 01:59:52,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:52,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:59:53,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:53,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027099573] [2022-11-03 01:59:53,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027099573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:53,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603444600] [2022-11-03 01:59:53,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:59:53,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:53,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:53,370 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:53,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:59:53,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:59:53,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:59:53,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 01:59:53,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:53,808 INFO L356 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-03 01:59:53,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 63 [2022-11-03 01:59:54,020 INFO L356 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-03 01:59:54,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 77 [2022-11-03 01:59:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-03 01:59:54,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:57,766 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 53 treesize of output 45 [2022-11-03 01:59:57,790 INFO L356 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2022-11-03 01:59:57,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 83 [2022-11-03 01:59:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-03 01:59:57,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603444600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:57,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [137650560] [2022-11-03 01:59:57,843 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:59:57,843 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:57,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:59:57,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:59:57,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:59:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:57,904 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:59:57,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 01:59:57,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:57,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2022-11-03 01:59:57,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:57,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:59:58,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:59:58,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:59:58,100 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:59:58,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 229 [2022-11-03 01:59:58,207 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 16 treesize of output 12 [2022-11-03 01:59:58,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 01:59:58,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 84 [2022-11-03 01:59:58,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 01:59:58,352 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:59:59,091 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1938#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~x~0#1| 4) |ULTIMATE.start_main_~#vectorx~0#1.offset|))) (not (= |ULTIMATE.start_main_~found~0#1| 0)) (= 100000 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~#vectorx~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (= (ite (not (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_~element~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~pos~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= |ULTIMATE.start_main_~found~0#1| 1) (<= 0 |#StackHeapBarrier|) (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|)) (= |#NULL.base| 0))' at error location [2022-11-03 01:59:59,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:59:59,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:59,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 42 [2022-11-03 01:59:59,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994681666] [2022-11-03 01:59:59,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:59,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 01:59:59,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:59,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 01:59:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2056, Unknown=4, NotChecked=0, Total=2450 [2022-11-03 01:59:59,095 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:02,057 INFO L93 Difference]: Finished difference Result 160 states and 210 transitions. [2022-11-03 02:00:02,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-03 02:00:02,058 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 02:00:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:02,065 INFO L225 Difference]: With dead ends: 160 [2022-11-03 02:00:02,065 INFO L226 Difference]: Without dead ends: 109 [2022-11-03 02:00:02,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=497, Invalid=3156, Unknown=7, NotChecked=0, Total=3660 [2022-11-03 02:00:02,069 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:02,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 79 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 224 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2022-11-03 02:00:02,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-03 02:00:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2022-11-03 02:00:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.3058823529411765) internal successors, (111), 85 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 111 transitions. [2022-11-03 02:00:02,098 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 111 transitions. Word has length 36 [2022-11-03 02:00:02,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:02,099 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 111 transitions. [2022-11-03 02:00:02,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:02,099 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 111 transitions. [2022-11-03 02:00:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:00:02,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:02,101 INFO L195 NwaCegarLoop]: trace histogram [22, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:02,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:02,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:02,310 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:02,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1434609359, now seen corresponding path program 4 times [2022-11-03 02:00:02,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:02,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795820675] [2022-11-03 02:00:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:02,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:00:03,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:03,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795820675] [2022-11-03 02:00:03,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795820675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:03,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913284199] [2022-11-03 02:00:03,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:00:03,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:03,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:03,114 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:03,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:00:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:03,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:00:03,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:00:03,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:00:04,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913284199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:04,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801485895] [2022-11-03 02:00:04,719 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 02:00:04,719 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:04,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:04,720 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:04,720 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:04,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:04,802 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:00:04,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:00:04,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:04,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2022-11-03 02:00:04,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:04,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:00:04,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:04,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:04,926 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:00:04,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 229 [2022-11-03 02:00:05,030 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 16 treesize of output 12 [2022-11-03 02:00:05,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:00:05,164 INFO L356 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-11-03 02:00:05,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 120 [2022-11-03 02:00:05,225 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 11 iterations. Over-approximation may be very coarse. [2022-11-03 02:00:05,226 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 11 iterations. Over-approximation may be very coarse. [2022-11-03 02:00:05,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:00:05,253 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:05,692 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2712#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~x~0#1| 4) |ULTIMATE.start_main_~#vectorx~0#1.offset|))) (not (= |ULTIMATE.start_main_~found~0#1| 0)) (= 100000 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~#vectorx~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (= (ite (not (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_~element~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~pos~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= 0 |#StackHeapBarrier|) (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|)) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:05,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:05,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:05,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2022-11-03 02:00:05,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22984240] [2022-11-03 02:00:05,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:05,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-03 02:00:05,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:05,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-03 02:00:05,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2292, Invalid=3870, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 02:00:05,697 INFO L87 Difference]: Start difference. First operand 86 states and 111 transitions. Second operand has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:05,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:05,878 INFO L93 Difference]: Finished difference Result 180 states and 254 transitions. [2022-11-03 02:00:05,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-03 02:00:05,879 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-03 02:00:05,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:05,880 INFO L225 Difference]: With dead ends: 180 [2022-11-03 02:00:05,880 INFO L226 Difference]: Without dead ends: 118 [2022-11-03 02:00:05,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2961 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2292, Invalid=3870, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 02:00:05,883 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:05,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:00:05,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-03 02:00:05,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 110. [2022-11-03 02:00:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.238532110091743) internal successors, (135), 109 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 135 transitions. [2022-11-03 02:00:05,915 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 135 transitions. Word has length 39 [2022-11-03 02:00:05,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:05,915 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 135 transitions. [2022-11-03 02:00:05,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 135 transitions. [2022-11-03 02:00:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:00:05,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:05,918 INFO L195 NwaCegarLoop]: trace histogram [46, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:05,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:06,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:06,134 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:06,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:06,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1010912945, now seen corresponding path program 5 times [2022-11-03 02:00:06,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:06,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732904872] [2022-11-03 02:00:06,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:06,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:00:08,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:08,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732904872] [2022-11-03 02:00:08,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732904872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:08,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369951765] [2022-11-03 02:00:08,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:00:08,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:08,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:08,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:08,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:00:08,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:00:08,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:08,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:00:08,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:09,419 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:00:09,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2022-11-03 02:00:09,534 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:00:09,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 33 [2022-11-03 02:00:09,647 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:00:09,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 36 [2022-11-03 02:00:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1087 trivial. 0 not checked. [2022-11-03 02:00:09,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:25,218 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_555 Int) (v_ArrVal_554 Int) (v_ArrVal_552 Int) (|v_ULTIMATE.start_main_~i~0#1_231| Int) (|v_ULTIMATE.start_main_~i~0#1_233| Int) (|v_ULTIMATE.start_main_~i~0#1_232| Int)) (or (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_231|) |c_ULTIMATE.start_main_~n~0#1|) (not (<= |v_ULTIMATE.start_main_~i~0#1_231| (+ |v_ULTIMATE.start_main_~i~0#1_232| 1))) (not (= |c_ULTIMATE.start_main_~element~0#1| (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_233| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_552) (+ (* |v_ULTIMATE.start_main_~i~0#1_232| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_554) (+ (* |v_ULTIMATE.start_main_~i~0#1_231| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_555) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_233| 1))) is different from false [2022-11-03 02:00:26,206 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 36 treesize of output 32 [2022-11-03 02:00:26,219 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:00:26,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 358 treesize of output 268 [2022-11-03 02:00:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1087 trivial. 8 not checked. [2022-11-03 02:00:26,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369951765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:26,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180606450] [2022-11-03 02:00:26,543 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 02:00:26,543 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:26,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:26,544 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:26,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:26,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:26,597 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:00:26,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:00:26,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:26,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2022-11-03 02:00:26,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:26,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:00:26,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:26,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:00:26,742 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:00:26,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 229 [2022-11-03 02:00:26,852 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 16 treesize of output 12 [2022-11-03 02:00:26,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:00:26,979 INFO L356 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-11-03 02:00:26,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 120 [2022-11-03 02:00:27,038 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 11 iterations. Over-approximation may be very coarse. [2022-11-03 02:00:27,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:00:27,067 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:27,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3699#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~x~0#1| 4) |ULTIMATE.start_main_~#vectorx~0#1.offset|))) (not (= |ULTIMATE.start_main_~found~0#1| 0)) (= 100000 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~#vectorx~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (= (ite (not (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_~element~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~pos~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= 0 |#StackHeapBarrier|) (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|)) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:27,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:27,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:27,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 12, 12] total 69 [2022-11-03 02:00:27,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181616505] [2022-11-03 02:00:27,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:27,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-03 02:00:27,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:27,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-03 02:00:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1486, Invalid=4364, Unknown=6, NotChecked=150, Total=6006 [2022-11-03 02:00:27,881 INFO L87 Difference]: Start difference. First operand 110 states and 135 transitions. Second operand has 70 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:31,465 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|))) (and (<= (+ 99998 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~n~0#1|) (not (= (select .cse0 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (<= 100000 |c_ULTIMATE.start_main_~n~0#1|) (= |c_ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (forall ((v_ArrVal_555 Int) (v_ArrVal_554 Int) (v_ArrVal_552 Int) (|v_ULTIMATE.start_main_~i~0#1_231| Int) (|v_ULTIMATE.start_main_~i~0#1_233| Int) (|v_ULTIMATE.start_main_~i~0#1_232| Int)) (or (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_231|) |c_ULTIMATE.start_main_~n~0#1|) (not (<= |v_ULTIMATE.start_main_~i~0#1_231| (+ |v_ULTIMATE.start_main_~i~0#1_232| 1))) (not (= |c_ULTIMATE.start_main_~element~0#1| (select (store (store (store .cse0 (+ (* |v_ULTIMATE.start_main_~i~0#1_233| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_552) (+ (* |v_ULTIMATE.start_main_~i~0#1_232| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_554) (+ (* |v_ULTIMATE.start_main_~i~0#1_231| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_555) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_233| 1))))) is different from false [2022-11-03 02:00:32,893 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|))) (and (not (= (select .cse0 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (<= 100000 |c_ULTIMATE.start_main_~n~0#1|) (= |c_ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (forall ((v_ArrVal_555 Int) (v_ArrVal_554 Int) (v_ArrVal_552 Int) (|v_ULTIMATE.start_main_~i~0#1_231| Int) (|v_ULTIMATE.start_main_~i~0#1_233| Int) (|v_ULTIMATE.start_main_~i~0#1_232| Int)) (or (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_231|) |c_ULTIMATE.start_main_~n~0#1|) (not (<= |v_ULTIMATE.start_main_~i~0#1_231| (+ |v_ULTIMATE.start_main_~i~0#1_232| 1))) (not (= |c_ULTIMATE.start_main_~element~0#1| (select (store (store (store .cse0 (+ (* |v_ULTIMATE.start_main_~i~0#1_233| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_552) (+ (* |v_ULTIMATE.start_main_~i~0#1_232| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_554) (+ (* |v_ULTIMATE.start_main_~i~0#1_231| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_555) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_233| 1))))) is different from false [2022-11-03 02:00:33,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:33,516 INFO L93 Difference]: Finished difference Result 209 states and 268 transitions. [2022-11-03 02:00:33,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-03 02:00:33,517 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-03 02:00:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:33,519 INFO L225 Difference]: With dead ends: 209 [2022-11-03 02:00:33,519 INFO L226 Difference]: Without dead ends: 147 [2022-11-03 02:00:33,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3628 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=4346, Invalid=13214, Unknown=8, NotChecked=792, Total=18360 [2022-11-03 02:00:33,524 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:33,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 80 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 203 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2022-11-03 02:00:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-03 02:00:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2022-11-03 02:00:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.2660550458715596) internal successors, (138), 109 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:33,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 138 transitions. [2022-11-03 02:00:33,569 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 138 transitions. Word has length 63 [2022-11-03 02:00:33,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:33,570 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 138 transitions. [2022-11-03 02:00:33,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:33,570 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 138 transitions. [2022-11-03 02:00:33,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:00:33,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:33,572 INFO L195 NwaCegarLoop]: trace histogram [47, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:33,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:33,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:33,782 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:33,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:33,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1766758361, now seen corresponding path program 1 times [2022-11-03 02:00:33,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:33,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330436762] [2022-11-03 02:00:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:33,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:00:36,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:36,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330436762] [2022-11-03 02:00:36,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330436762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:36,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153560791] [2022-11-03 02:00:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:36,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:36,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:36,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:36,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:00:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:36,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:00:36,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:00:38,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:00:42,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153560791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:42,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1383061234] [2022-11-03 02:00:42,348 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:00:42,348 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:42,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:42,349 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:42,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:42,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:42,401 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 02:00:42,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 02:00:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:42,448 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:00:42,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:00:42,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:42,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:00:42,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:42,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:42,587 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:00:42,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 228 [2022-11-03 02:00:42,646 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 16 treesize of output 12 [2022-11-03 02:00:42,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:00:42,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 84 [2022-11-03 02:00:42,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:00:42,940 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:43,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4941#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= 100000 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~#vectorx~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 99999 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:43,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:43,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:43,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 145 [2022-11-03 02:00:43,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606255370] [2022-11-03 02:00:43,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:43,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-11-03 02:00:43,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:43,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-11-03 02:00:43,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9546, Invalid=14324, Unknown=0, NotChecked=0, Total=23870 [2022-11-03 02:00:43,971 INFO L87 Difference]: Start difference. First operand 110 states and 138 transitions. Second operand has 146 states, 146 states have (on average 1.082191780821918) internal successors, (158), 145 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:44,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:44,332 INFO L93 Difference]: Finished difference Result 228 states and 332 transitions. [2022-11-03 02:00:44,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-03 02:00:44,333 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.082191780821918) internal successors, (158), 145 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-03 02:00:44,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:44,337 INFO L225 Difference]: With dead ends: 228 [2022-11-03 02:00:44,337 INFO L226 Difference]: Without dead ends: 167 [2022-11-03 02:00:44,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11230 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=9546, Invalid=14324, Unknown=0, NotChecked=0, Total=23870 [2022-11-03 02:00:44,347 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:44,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 26 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:00:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-03 02:00:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 159. [2022-11-03 02:00:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1835443037974684) internal successors, (187), 158 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 187 transitions. [2022-11-03 02:00:44,400 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 187 transitions. Word has length 65 [2022-11-03 02:00:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:44,401 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 187 transitions. [2022-11-03 02:00:44,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.082191780821918) internal successors, (158), 145 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:00:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 187 transitions. [2022-11-03 02:00:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:00:44,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:44,404 INFO L195 NwaCegarLoop]: trace histogram [96, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:00:44,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:44,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:44,608 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:00:44,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:44,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1097107854, now seen corresponding path program 2 times [2022-11-03 02:00:44,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:44,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482515376] [2022-11-03 02:00:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:44,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4671 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:00:53,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:53,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482515376] [2022-11-03 02:00:53,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482515376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:53,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760244043] [2022-11-03 02:00:53,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:00:53,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:53,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:53,431 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:53,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:00:53,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:00:53,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:53,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:00:53,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:53,905 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 38 treesize of output 22 [2022-11-03 02:00:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4671 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4658 trivial. 0 not checked. [2022-11-03 02:00:54,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4671 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4658 trivial. 0 not checked. [2022-11-03 02:00:55,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760244043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:55,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [884846133] [2022-11-03 02:00:55,059 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:00:55,059 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:55,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:00:55,060 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:00:55,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:00:55,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:55,110 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:00:55,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:00:55,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:55,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2022-11-03 02:00:55,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:55,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:00:55,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:55,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:00:55,239 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:00:55,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 228 [2022-11-03 02:00:55,296 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 16 treesize of output 12 [2022-11-03 02:00:55,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:00:55,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 84 [2022-11-03 02:00:55,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:00:55,559 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:57,301 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6479#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= 100000 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~#vectorx~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 99999 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= |ULTIMATE.start_main_~found~0#1| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:57,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:57,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:57,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 9, 9] total 114 [2022-11-03 02:00:57,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030537602] [2022-11-03 02:00:57,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:57,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-11-03 02:00:57,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:57,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-11-03 02:00:57,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6180, Invalid=9072, Unknown=0, NotChecked=0, Total=15252 [2022-11-03 02:00:57,307 INFO L87 Difference]: Start difference. First operand 159 states and 187 transitions. Second operand has 115 states, 115 states have (on average 1.1565217391304348) internal successors, (133), 114 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:22,713 INFO L93 Difference]: Finished difference Result 531 states and 780 transitions. [2022-11-03 02:01:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2022-11-03 02:01:22,714 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.1565217391304348) internal successors, (133), 114 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-11-03 02:01:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:22,717 INFO L225 Difference]: With dead ends: 531 [2022-11-03 02:01:22,717 INFO L226 Difference]: Without dead ends: 470 [2022-11-03 02:01:22,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25752 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=33285, Invalid=73317, Unknown=0, NotChecked=0, Total=106602 [2022-11-03 02:01:22,732 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 477 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 1714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 2227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1714 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:22,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 36 Invalid, 2227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1714 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:01:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-11-03 02:01:22,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 329. [2022-11-03 02:01:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.3353658536585367) internal successors, (438), 328 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 438 transitions. [2022-11-03 02:01:22,852 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 438 transitions. Word has length 114 [2022-11-03 02:01:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:22,853 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 438 transitions. [2022-11-03 02:01:22,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.1565217391304348) internal successors, (133), 114 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 438 transitions. [2022-11-03 02:01:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-03 02:01:22,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:22,855 INFO L195 NwaCegarLoop]: trace histogram [103, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:22,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:23,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:23,070 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:23,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:23,070 INFO L85 PathProgramCache]: Analyzing trace with hash 792147798, now seen corresponding path program 6 times [2022-11-03 02:01:23,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:23,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297053150] [2022-11-03 02:01:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:23,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5386 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:01:32,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:32,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297053150] [2022-11-03 02:01:32,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297053150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:32,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394276437] [2022-11-03 02:01:32,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:01:32,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:32,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:32,592 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:32,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:01:32,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:01:32,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:01:32,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:01:32,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:33,515 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:01:33,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2022-11-03 02:01:33,618 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-03 02:01:33,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:01:33,730 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-03 02:01:33,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:01:33,844 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-03 02:01:33,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:01:33,958 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-03 02:01:33,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:01:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5386 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 5356 trivial. 0 not checked. [2022-11-03 02:01:34,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:35,271 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1595 Int) (v_ArrVal_1598 Int) (|v_ULTIMATE.start_main_~i~0#1_539| Int)) (or (not (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_1595) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_539| 4)) v_ArrVal_1598) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_539|)))) is different from false [2022-11-03 02:05:32,817 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_542| Int) (v_ArrVal_1591 Int) (v_ArrVal_1593 Int) (|v_ULTIMATE.start_main_~i~0#1_541| Int) (|v_ULTIMATE.start_main_~i~0#1_540| Int) (v_ArrVal_1595 Int) (v_ArrVal_1598 Int) (|v_ULTIMATE.start_main_~i~0#1_539| Int) (v_ArrVal_1589 Int)) (or (not (= |c_ULTIMATE.start_main_~element~0#1| (select (store (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_1589) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_542| 4)) v_ArrVal_1591) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_541| 4)) v_ArrVal_1593) (+ (* |v_ULTIMATE.start_main_~i~0#1_540| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_1595) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_539| 4)) v_ArrVal_1598) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_541| 1) |v_ULTIMATE.start_main_~i~0#1_540|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_542| 1) |v_ULTIMATE.start_main_~i~0#1_541|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_542|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_540| 1) |v_ULTIMATE.start_main_~i~0#1_539|)))) is different from false [2022-11-03 02:05:44,788 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 105 treesize of output 97 [2022-11-03 02:05:44,821 INFO L356 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2022-11-03 02:05:44,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12548 treesize of output 9205 [2022-11-03 02:05:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5386 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 5356 trivial. 9 not checked. [2022-11-03 02:05:51,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394276437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:51,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290766213] [2022-11-03 02:05:51,920 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 02:05:51,920 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:05:51,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:05:51,920 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:05:51,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:05:51,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:05:51,972 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:05:51,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:05:51,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:05:51,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2022-11-03 02:05:52,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:05:52,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:05:52,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:05:52,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:05:52,105 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:05:52,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 229 [2022-11-03 02:05:52,191 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 16 treesize of output 12 [2022-11-03 02:05:52,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:05:52,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 84 [2022-11-03 02:05:52,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:05:52,303 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:05:53,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9327#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~x~0#1| 4) |ULTIMATE.start_main_~#vectorx~0#1.offset|))) (not (= |ULTIMATE.start_main_~found~0#1| 0)) (= 100000 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~#vectorx~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (= (ite (not (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_~element~0#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~pos~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= |ULTIMATE.start_main_~found~0#1| 1) (<= 0 |#StackHeapBarrier|) (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|)) (= |#NULL.base| 0))' at error location [2022-11-03 02:05:53,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:05:53,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:05:53,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 16, 16] total 131 [2022-11-03 02:05:53,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541623251] [2022-11-03 02:05:53,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:05:53,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-03 02:05:53,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:53,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-03 02:05:53,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5738, Invalid=12653, Unknown=249, NotChecked=542, Total=19182 [2022-11-03 02:05:53,587 INFO L87 Difference]: Start difference. First operand 329 states and 438 transitions. Second operand has 131 states, 131 states have (on average 1.1221374045801527) internal successors, (147), 131 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:03,332 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|))) (and (forall ((v_ArrVal_1595 Int) (v_ArrVal_1598 Int) (|v_ULTIMATE.start_main_~i~0#1_539| Int)) (or (not (= (select (store (store .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_1595) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_539| 4)) v_ArrVal_1598) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_539|)))) (not (= (select .cse0 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (<= 5 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2022-11-03 02:06:04,067 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|)) (.cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|)) (.cse2 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (forall ((v_ArrVal_1593 Int) (|v_ULTIMATE.start_main_~i~0#1_540| Int) (v_ArrVal_1595 Int) (v_ArrVal_1598 Int) (|v_ULTIMATE.start_main_~i~0#1_539| Int)) (or (not (= (select (store (store (store .cse0 .cse1 v_ArrVal_1593) (+ (* |v_ULTIMATE.start_main_~i~0#1_540| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_1595) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_539| 4)) v_ArrVal_1598) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (not (<= .cse2 |v_ULTIMATE.start_main_~i~0#1_540|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_540| 1) |v_ULTIMATE.start_main_~i~0#1_539|)))) (forall ((v_ArrVal_1595 Int) (v_ArrVal_1598 Int) (|v_ULTIMATE.start_main_~i~0#1_539| Int)) (or (not (= (select (store (store .cse0 .cse1 v_ArrVal_1595) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_539| 4)) v_ArrVal_1598) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (not (<= .cse2 |v_ULTIMATE.start_main_~i~0#1_539|)))))) is different from false [2022-11-03 02:06:04,560 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|))) (and (forall ((v_ArrVal_1595 Int) (v_ArrVal_1598 Int) (|v_ULTIMATE.start_main_~i~0#1_539| Int)) (or (not (= (select (store (store .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_1595) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_539| 4)) v_ArrVal_1598) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_539|)))) (<= 6 |c_ULTIMATE.start_main_~i~0#1|) (not (= (select .cse0 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)))) is different from false [2022-11-03 02:06:05,118 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|)) (.cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|))) (and (forall ((v_ArrVal_1595 Int) (v_ArrVal_1598 Int) (|v_ULTIMATE.start_main_~i~0#1_539| Int)) (or (not (= (select (store (store .cse0 .cse1 v_ArrVal_1595) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_539| 4)) v_ArrVal_1598) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_539|)))) (forall ((v_ArrVal_1598 Int)) (not (= |c_ULTIMATE.start_main_~element~0#1| (select (store .cse0 .cse1 v_ArrVal_1598) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|)))))) is different from false [2022-11-03 02:06:05,621 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|))) (and (forall ((v_ArrVal_1595 Int) (v_ArrVal_1598 Int) (|v_ULTIMATE.start_main_~i~0#1_539| Int)) (or (not (= (select (store (store .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_1595) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_539| 4)) v_ArrVal_1598) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_539|)))) (not (= (select .cse0 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (<= 7 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2022-11-03 02:06:06,126 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|))) (and (forall ((v_ArrVal_1595 Int) (v_ArrVal_1598 Int) (|v_ULTIMATE.start_main_~i~0#1_539| Int)) (or (not (= (select (store (store .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_1595) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_539| 4)) v_ArrVal_1598) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_539|)))) (not (= (select .cse0 |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (<= 8 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2022-11-03 02:06:07,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:07,113 INFO L93 Difference]: Finished difference Result 590 states and 816 transitions. [2022-11-03 02:06:07,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-11-03 02:06:07,114 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.1221374045801527) internal successors, (147), 131 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2022-11-03 02:06:07,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:07,116 INFO L225 Difference]: With dead ends: 590 [2022-11-03 02:06:07,116 INFO L226 Difference]: Without dead ends: 366 [2022-11-03 02:06:07,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 332 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 3805 ImplicationChecksByTransitivity, 271.6s TimeCoverageRelationStatistics Valid=5826, Invalid=14829, Unknown=257, NotChecked=2344, Total=23256 [2022-11-03 02:06:07,122 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 288 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:07,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 104 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 361 Invalid, 0 Unknown, 288 Unchecked, 0.2s Time] [2022-11-03 02:06:07,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-11-03 02:06:07,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 339. [2022-11-03 02:06:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.3284023668639053) internal successors, (449), 338 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 449 transitions. [2022-11-03 02:06:07,243 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 449 transitions. Word has length 122 [2022-11-03 02:06:07,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:07,244 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 449 transitions. [2022-11-03 02:06:07,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.1221374045801527) internal successors, (147), 131 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 449 transitions. [2022-11-03 02:06:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 02:06:07,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:07,246 INFO L195 NwaCegarLoop]: trace histogram [104, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:07,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:07,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:06:07,451 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:07,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1807282213, now seen corresponding path program 3 times [2022-11-03 02:06:07,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:07,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984815610] [2022-11-03 02:06:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:07,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5483 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:06:15,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:15,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984815610] [2022-11-03 02:06:15,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984815610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:15,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93491605] [2022-11-03 02:06:15,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:06:15,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:15,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:15,367 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:15,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:06:15,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:06:15,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:15,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 02:06:15,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:16,258 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:06:16,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 26 [2022-11-03 02:06:16,350 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-03 02:06:16,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-03 02:06:16,450 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-03 02:06:16,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-03 02:06:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5483 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2022-11-03 02:06:16,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:17,848 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2034 Int) (v_ArrVal_2035 Int) (|v_ULTIMATE.start_main_~i~0#1_568| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_568|)) (not (= |c_ULTIMATE.start_main_~element~0#1| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_2034) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_568| 4)) v_ArrVal_2035) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| 4)))))) is different from false [2022-11-03 02:09:25,715 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 81 treesize of output 73 [2022-11-03 02:09:25,745 INFO L356 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2022-11-03 02:09:25,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1604 treesize of output 1173 [2022-11-03 02:09:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5483 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 5460 trivial. 3 not checked. [2022-11-03 02:09:26,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93491605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:26,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1808581264] [2022-11-03 02:09:26,146 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:09:26,146 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:09:26,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:09:26,147 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:09:26,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:09:26,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:26,193 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:09:26,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:09:26,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:26,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2022-11-03 02:09:26,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:26,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:09:26,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:09:26,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:09:26,303 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:09:26,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 229 [2022-11-03 02:09:26,421 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 16 treesize of output 12 [2022-11-03 02:09:26,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:09:26,534 INFO L356 Elim1Store]: treesize reduction 79, result has 31.3 percent of original size [2022-11-03 02:09:26,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 112 [2022-11-03 02:09:26,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:09:26,732 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:09:28,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12046#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= 100000 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~#vectorx~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 99999 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= |ULTIMATE.start_main_~found~0#1| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:09:28,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:09:28,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:09:28,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 15, 15] total 129 [2022-11-03 02:09:28,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497229675] [2022-11-03 02:09:28,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:09:28,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-11-03 02:09:28,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:09:28,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-11-03 02:09:28,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5801, Invalid=12711, Unknown=124, NotChecked=270, Total=18906 [2022-11-03 02:09:28,483 INFO L87 Difference]: Start difference. First operand 339 states and 449 transitions. Second operand has 129 states, 129 states have (on average 1.1705426356589148) internal successors, (151), 129 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:33,742 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| 4))) (and (not (= |c_ULTIMATE.start_main_~element~0#1| (select .cse0 .cse1))) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (forall ((v_ArrVal_2034 Int) (v_ArrVal_2035 Int) (|v_ULTIMATE.start_main_~i~0#1_568| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_568|)) (not (= |c_ULTIMATE.start_main_~element~0#1| (select (store (store .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_2034) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_568| 4)) v_ArrVal_2035) .cse1))))))) is different from false [2022-11-03 02:09:34,295 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#vectorx~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| 4))) (and (<= 6 |c_ULTIMATE.start_main_~i~0#1|) (not (= |c_ULTIMATE.start_main_~element~0#1| (select .cse0 .cse1))) (forall ((v_ArrVal_2034 Int) (v_ArrVal_2035 Int) (|v_ULTIMATE.start_main_~i~0#1_568| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_568|)) (not (= |c_ULTIMATE.start_main_~element~0#1| (select (store (store .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#vectorx~0#1.offset|) v_ArrVal_2034) (+ |c_ULTIMATE.start_main_~#vectorx~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_568| 4)) v_ArrVal_2035) .cse1))))))) is different from false [2022-11-03 02:09:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:34,540 INFO L93 Difference]: Finished difference Result 596 states and 821 transitions. [2022-11-03 02:09:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-11-03 02:09:34,540 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.1705426356589148) internal successors, (151), 129 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-11-03 02:09:34,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:34,542 INFO L225 Difference]: With dead ends: 596 [2022-11-03 02:09:34,543 INFO L226 Difference]: Without dead ends: 363 [2022-11-03 02:09:34,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3650 ImplicationChecksByTransitivity, 202.2s TimeCoverageRelationStatistics Valid=5941, Invalid=13966, Unknown=127, NotChecked=846, Total=20880 [2022-11-03 02:09:34,546 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:34,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 97 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 410 Invalid, 0 Unknown, 226 Unchecked, 0.3s Time] [2022-11-03 02:09:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-03 02:09:34,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2022-11-03 02:09:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.3276353276353277) internal successors, (466), 351 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 466 transitions. [2022-11-03 02:09:34,661 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 466 transitions. Word has length 124 [2022-11-03 02:09:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:34,662 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 466 transitions. [2022-11-03 02:09:34,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.1705426356589148) internal successors, (151), 129 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:09:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 466 transitions. [2022-11-03 02:09:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 02:09:34,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:34,664 INFO L195 NwaCegarLoop]: trace histogram [105, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:09:34,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:09:34,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:09:34,873 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:34,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:34,874 INFO L85 PathProgramCache]: Analyzing trace with hash -401065625, now seen corresponding path program 4 times [2022-11-03 02:09:34,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:34,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755120290] [2022-11-03 02:09:34,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:34,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5598 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:09:42,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:42,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755120290] [2022-11-03 02:09:42,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755120290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:09:42,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290948354] [2022-11-03 02:09:42,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:09:42,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:42,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:42,971 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:42,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:09:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:43,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-03 02:09:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5598 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:09:49,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5598 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:10:06,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290948354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:06,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1615270510] [2022-11-03 02:10:06,019 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:10:06,019 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:10:06,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:10:06,019 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:10:06,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:10:06,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:06,065 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:10:06,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:10:06,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:06,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2022-11-03 02:10:06,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:06,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:10:06,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:06,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:10:06,197 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 02:10:06,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 229 [2022-11-03 02:10:06,290 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 16 treesize of output 12 [2022-11-03 02:10:06,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:10:06,410 INFO L356 Elim1Store]: treesize reduction 71, result has 38.3 percent of original size [2022-11-03 02:10:06,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 120 [2022-11-03 02:10:06,441 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 11 iterations. Over-approximation may be very coarse. [2022-11-03 02:10:06,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:10:06,564 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:10:08,007 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14990#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= 100000 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~#vectorx~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 99999 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= |ULTIMATE.start_main_~found~0#1| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:10:08,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:10:08,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:10:08,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 319 [2022-11-03 02:10:08,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567189219] [2022-11-03 02:10:08,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:10:08,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 320 states [2022-11-03 02:10:08,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:08,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 320 interpolants. [2022-11-03 02:10:08,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45619, Invalid=62293, Unknown=0, NotChecked=0, Total=107912 [2022-11-03 02:10:08,024 INFO L87 Difference]: Start difference. First operand 352 states and 466 transitions. Second operand has 320 states, 320 states have (on average 1.0375) internal successors, (332), 319 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:09,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:09,189 INFO L93 Difference]: Finished difference Result 712 states and 1046 transitions. [2022-11-03 02:10:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-11-03 02:10:09,190 INFO L78 Accepts]: Start accepts. Automaton has has 320 states, 320 states have (on average 1.0375) internal successors, (332), 319 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-11-03 02:10:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:09,192 INFO L225 Difference]: With dead ends: 712 [2022-11-03 02:10:09,192 INFO L226 Difference]: Without dead ends: 467 [2022-11-03 02:10:09,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49394 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=45619, Invalid=62293, Unknown=0, NotChecked=0, Total=107912 [2022-11-03 02:10:09,200 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:09,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 46 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:10:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-11-03 02:10:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 459. [2022-11-03 02:10:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.2510917030567685) internal successors, (573), 458 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 573 transitions. [2022-11-03 02:10:09,322 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 573 transitions. Word has length 127 [2022-11-03 02:10:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:09,322 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 573 transitions. [2022-11-03 02:10:09,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 320 states, 320 states have (on average 1.0375) internal successors, (332), 319 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:10:09,323 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 573 transitions. [2022-11-03 02:10:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-03 02:10:09,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:09,327 INFO L195 NwaCegarLoop]: trace histogram [212, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:10:09,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-03 02:10:09,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:09,543 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:09,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1760263982, now seen corresponding path program 5 times [2022-11-03 02:10:09,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:09,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019761158] [2022-11-03 02:10:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:09,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 22611 backedges. 0 proven. 22578 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:10:41,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:41,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019761158] [2022-11-03 02:10:41,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019761158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:10:41,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748630958] [2022-11-03 02:10:41,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:10:41,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:10:41,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:10:41,842 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:10:41,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8327ad6a-75d1-4a7e-88f4-645e36ecd2aa/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:10:42,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:10:42,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:10:42,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:10:42,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:10:42,723 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 38 treesize of output 22 [2022-11-03 02:10:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 22611 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 22580 trivial. 0 not checked. [2022-11-03 02:10:43,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 22611 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 22580 trivial. 0 not checked. [2022-11-03 02:10:46,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748630958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:46,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1209733802] [2022-11-03 02:10:46,938 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:10:46,938 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:10:46,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:10:46,939 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:10:46,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:10:46,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:46,988 INFO L356 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-03 02:10:46,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2022-11-03 02:10:47,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:47,034 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:10:47,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-03 02:10:47,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:47,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:10:47,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:47,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:10:47,141 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:10:47,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 228 [2022-11-03 02:10:47,196 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 16 treesize of output 12 [2022-11-03 02:10:47,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:10:47,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 84 [2022-11-03 02:10:47,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-03 02:10:47,426 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:10:49,861 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18925#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= 100000 |ULTIMATE.start_main_~n~0#1|) (<= 0 |ULTIMATE.start_main_~#vectorx~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 99999 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~found~0#1|) (<= |ULTIMATE.start_main_~found~0#1| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:10:49,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:10:49,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:10:49,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 15, 15] total 241 [2022-11-03 02:10:49,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785688383] [2022-11-03 02:10:49,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:10:49,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 242 states [2022-11-03 02:10:49,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:49,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 242 interpolants. [2022-11-03 02:10:49,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26948, Invalid=35802, Unknown=0, NotChecked=0, Total=62750 [2022-11-03 02:10:49,870 INFO L87 Difference]: Start difference. First operand 459 states and 573 transitions. Second operand has 242 states, 242 states have (on average 1.0661157024793388) internal successors, (258), 241 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)