./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/modn.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_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/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_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/modn.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/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_7e7691cf-d4a1-4ce2-918e-5e73c9573985/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 b1b107a3e17c36933ddc5a5cff6ab95f9f0d71df794eec32ec4a28d109efd829 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:45:39,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:45:39,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:45:39,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:45:39,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:45:39,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:45:39,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:45:39,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:45:39,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:45:39,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:45:39,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:45:39,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:45:39,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:45:39,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:45:39,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:45:39,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:45:39,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:45:39,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:45:39,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:45:39,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:45:39,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:45:39,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:45:39,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:45:39,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:45:39,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:45:39,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:45:39,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:45:39,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:45:39,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:45:39,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:45:39,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:45:39,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:45:39,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:45:39,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:45:39,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:45:39,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:45:39,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:45:39,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:45:39,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:45:39,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:45:39,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:45:39,815 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:45:39,856 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:45:39,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:45:39,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:45:39,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:45:39,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:45:39,858 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:45:39,858 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:45:39,858 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:45:39,862 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:45:39,863 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:45:39,863 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:45:39,864 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:45:39,864 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:45:39,864 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:45:39,864 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:45:39,864 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:45:39,865 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:45:39,865 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:45:39,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:45:39,866 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:45:39,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:45:39,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:45:39,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:45:39,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:45:39,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:45:39,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:45:39,867 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:45:39,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:45:39,868 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:45:39,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:45:39,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:45:39,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:45:39,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:45:39,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:45:39,869 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:45:39,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:45:39,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:45:39,870 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:45:39,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:45:39,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:45:39,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:45:39,870 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_7e7691cf-d4a1-4ce2-918e-5e73c9573985/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1b107a3e17c36933ddc5a5cff6ab95f9f0d71df794eec32ec4a28d109efd829 [2022-11-03 02:45:40,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:45:40,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:45:40,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:45:40,170 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:45:40,171 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:45:40,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/modn.c [2022-11-03 02:45:40,238 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/data/50fada547/6f2da3d888d2458180b8c624745ba620/FLAGddd4f9730 [2022-11-03 02:45:40,740 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:45:40,741 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/sv-benchmarks/c/array-fpi/modn.c [2022-11-03 02:45:40,748 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/data/50fada547/6f2da3d888d2458180b8c624745ba620/FLAGddd4f9730 [2022-11-03 02:45:41,104 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/data/50fada547/6f2da3d888d2458180b8c624745ba620 [2022-11-03 02:45:41,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:45:41,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:45:41,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:45:41,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:45:41,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:45:41,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:45:41" (1/1) ... [2022-11-03 02:45:41,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a92b549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41, skipping insertion in model container [2022-11-03 02:45:41,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:45:41" (1/1) ... [2022-11-03 02:45:41,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:45:41,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:45:41,325 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_7e7691cf-d4a1-4ce2-918e-5e73c9573985/sv-benchmarks/c/array-fpi/modn.c[587,600] [2022-11-03 02:45:41,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:45:41,350 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:45:41,363 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_7e7691cf-d4a1-4ce2-918e-5e73c9573985/sv-benchmarks/c/array-fpi/modn.c[587,600] [2022-11-03 02:45:41,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:45:41,384 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:45:41,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41 WrapperNode [2022-11-03 02:45:41,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:45:41,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:45:41,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:45:41,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:45:41,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41" (1/1) ... [2022-11-03 02:45:41,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41" (1/1) ... [2022-11-03 02:45:41,420 INFO L138 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-11-03 02:45:41,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:45:41,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:45:41,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:45:41,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:45:41,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41" (1/1) ... [2022-11-03 02:45:41,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41" (1/1) ... [2022-11-03 02:45:41,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41" (1/1) ... [2022-11-03 02:45:41,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41" (1/1) ... [2022-11-03 02:45:41,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41" (1/1) ... [2022-11-03 02:45:41,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41" (1/1) ... [2022-11-03 02:45:41,443 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41" (1/1) ... [2022-11-03 02:45:41,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41" (1/1) ... [2022-11-03 02:45:41,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:45:41,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:45:41,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:45:41,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:45:41,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41" (1/1) ... [2022-11-03 02:45:41,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:45:41,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:41,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:45:41,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:45:41,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:45:41,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:45:41,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:45:41,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:45:41,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:45:41,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:45:41,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:45:41,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:45:41,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:45:41,592 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:45:41,594 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:45:41,754 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:45:41,798 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:45:41,798 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:45:41,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:45:41 BoogieIcfgContainer [2022-11-03 02:45:41,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:45:41,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:45:41,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:45:41,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:45:41,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:45:41" (1/3) ... [2022-11-03 02:45:41,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121ba1b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:45:41, skipping insertion in model container [2022-11-03 02:45:41,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:41" (2/3) ... [2022-11-03 02:45:41,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@121ba1b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:45:41, skipping insertion in model container [2022-11-03 02:45:41,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:45:41" (3/3) ... [2022-11-03 02:45:41,810 INFO L112 eAbstractionObserver]: Analyzing ICFG modn.c [2022-11-03 02:45:41,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:45:41,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:45:41,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:45:41,885 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;@1cab3f0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:45:41,885 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:45:41,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 02:45:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:45:41,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:41,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:41,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:41,915 INFO L85 PathProgramCache]: Analyzing trace with hash 90967917, now seen corresponding path program 1 times [2022-11-03 02:45:41,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:41,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599324360] [2022-11-03 02:45:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:41,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:42,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:42,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599324360] [2022-11-03 02:45:42,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599324360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:42,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:42,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:42,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293869166] [2022-11-03 02:45:42,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:42,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:42,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:42,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:42,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:42,311 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 02:45:42,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:42,367 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2022-11-03 02:45:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:42,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-11-03 02:45:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:42,377 INFO L225 Difference]: With dead ends: 20 [2022-11-03 02:45:42,390 INFO L226 Difference]: Without dead ends: 10 [2022-11-03 02:45:42,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:42,397 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:42,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:45:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-03 02:45:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-03 02:45:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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 02:45:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-03 02:45:42,442 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-11-03 02:45:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:42,442 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-03 02:45:42,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 02:45:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-03 02:45:42,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:45:42,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:42,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:42,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:45:42,444 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:42,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:42,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1733550639, now seen corresponding path program 1 times [2022-11-03 02:45:42,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:42,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241271463] [2022-11-03 02:45:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:42,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:42,559 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 02:45:42,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:42,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241271463] [2022-11-03 02:45:42,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241271463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:42,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:42,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:45:42,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046673226] [2022-11-03 02:45:42,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:42,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:45:42,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:42,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:45:42,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:45:42,572 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 02:45:42,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:42,651 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-11-03 02:45:42,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:45:42,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 02:45:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:42,655 INFO L225 Difference]: With dead ends: 21 [2022-11-03 02:45:42,655 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 02:45:42,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 02:45:42,657 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:42,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:42,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 02:45:42,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2022-11-03 02:45:42,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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 02:45:42,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-03 02:45:42,662 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-11-03 02:45:42,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:42,662 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-03 02:45:42,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 02:45:42,663 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-03 02:45:42,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:45:42,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:42,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:42,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:45:42,664 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2086190460, now seen corresponding path program 1 times [2022-11-03 02:45:42,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:42,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298022471] [2022-11-03 02:45:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:42,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:42,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:45:42,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771850149] [2022-11-03 02:45:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:42,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:42,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:42,739 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:42,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:45:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:42,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:45:42,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:42,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:45:43,018 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 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-03 02:45:43,174 INFO L356 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2022-11-03 02:45:43,174 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 25 treesize of output 28 [2022-11-03 02:45:43,349 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 34 treesize of output 22 [2022-11-03 02:45:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:43,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:45,668 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse3 (< c_~N~0 0)) (.cse6 (mod .cse7 c_~N~0))) (let ((.cse0 (= .cse6 0)) (.cse1 (< .cse7 0)) (.cse5 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (not .cse3))) (and (or (and (not .cse0) .cse1) (let ((.cse2 (forall ((|ULTIMATE.start_main_~a~0#1.base| Int)) (= (select (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) .cse5 .cse6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) (and (or .cse2 .cse3) (or .cse4 .cse2)))) (or .cse0 (not .cse1) (and (or (forall ((|ULTIMATE.start_main_~a~0#1.base| Int)) (= (select (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) .cse5 (+ .cse6 (* (- 1) c_~N~0))) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) .cse3) (or (forall ((|ULTIMATE.start_main_~a~0#1.base| Int)) (= (select (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) .cse5 (+ c_~N~0 .cse6)) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) .cse4))))))) is different from false [2022-11-03 02:45:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-03 02:45:54,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:54,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298022471] [2022-11-03 02:45:54,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:45:54,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771850149] [2022-11-03 02:45:54,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771850149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:54,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [855482184] [2022-11-03 02:45:54,273 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:45:54,274 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:45:54,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:45:54,282 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:45:54,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:45:54,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:54,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:54,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:54,758 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:45:54,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:45:54,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:54,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:45:54,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:54,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:54,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 02:45:54,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:54,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2022-11-03 02:45:55,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:45:55,302 INFO L356 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-03 02:45:55,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 423 treesize of output 398 [2022-11-03 02:45:55,445 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 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:45:55,556 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:45:55,556 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 60 treesize of output 48 [2022-11-03 02:45:55,738 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:45:55,739 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 65 treesize of output 63 [2022-11-03 02:45:55,818 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:45:57,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (= |ULTIMATE.start_main_#t~mem11#1| 0) 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:45:57,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:45:57,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:45:57,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-03 02:45:57,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6341062] [2022-11-03 02:45:57,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:57,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:45:57,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:57,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:45:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=220, Unknown=2, NotChecked=30, Total=306 [2022-11-03 02:45:57,960 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 02:45:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:58,342 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-11-03 02:45:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:45:58,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 02:45:58,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:58,345 INFO L225 Difference]: With dead ends: 20 [2022-11-03 02:45:58,345 INFO L226 Difference]: Without dead ends: 18 [2022-11-03 02:45:58,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=59, Invalid=249, Unknown=2, NotChecked=32, Total=342 [2022-11-03 02:45:58,347 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:58,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-11-03 02:45:58,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-03 02:45:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-11-03 02:45:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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 02:45:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-03 02:45:58,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2022-11-03 02:45:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:58,352 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-03 02:45:58,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 02:45:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-03 02:45:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:45:58,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:58,353 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:58,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:58,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:58,554 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:58,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:58,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1070514912, now seen corresponding path program 2 times [2022-11-03 02:45:58,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:58,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286505918] [2022-11-03 02:45:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:58,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:58,581 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:45:58,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663744344] [2022-11-03 02:45:58,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:45:58,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:58,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:58,595 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:58,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:45:58,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:45:58,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:45:58,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:45:58,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:58,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:45:59,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:59,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286505918] [2022-11-03 02:45:59,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:45:59,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663744344] [2022-11-03 02:45:59,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663744344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:59,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127326922] [2022-11-03 02:45:59,101 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:45:59,101 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:45:59,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:45:59,101 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:45:59,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:45:59,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:59,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:59,433 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 02:45:59,434 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 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 02:45:59,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:59,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:59,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:59,838 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:45:59,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:45:59,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:59,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:45:59,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:45:59,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2022-11-03 02:46:00,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:46:00,186 INFO L356 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-03 02:46:00,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 423 treesize of output 398 [2022-11-03 02:46:00,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:46:00,385 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:46:00,385 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 60 treesize of output 48 [2022-11-03 02:46:00,584 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:46:00,584 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 65 treesize of output 63 [2022-11-03 02:46:00,673 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:46:02,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '294#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (= |ULTIMATE.start_main_#t~mem11#1| 0) 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:46:02,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:46:02,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:46:02,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-03 02:46:02,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750982534] [2022-11-03 02:46:02,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:02,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:46:02,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:02,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:46:02,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:46:02,362 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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 02:46:02,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:02,957 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-11-03 02:46:02,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:46:02,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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 02:46:02,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:02,959 INFO L225 Difference]: With dead ends: 34 [2022-11-03 02:46:02,959 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 02:46:02,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:46:02,961 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:02,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:46:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 02:46:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2022-11-03 02:46:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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 02:46:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-03 02:46:02,967 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-11-03 02:46:02,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:02,967 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-03 02:46:02,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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 02:46:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-03 02:46:02,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:46:02,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:02,968 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:02,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:03,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:03,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:03,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash 239080241, now seen corresponding path program 3 times [2022-11-03 02:46:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:03,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227673430] [2022-11-03 02:46:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:03,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:03,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:46:03,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912905358] [2022-11-03 02:46:03,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:46:03,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:03,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:03,212 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:03,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:46:03,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:46:03,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:46:03,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:46:03,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:03,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:03,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:03,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227673430] [2022-11-03 02:46:03,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:46:03,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912905358] [2022-11-03 02:46:03,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912905358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:03,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1992355254] [2022-11-03 02:46:03,602 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:46:03,602 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:46:03,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:46:03,602 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:46:03,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:46:03,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:03,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:03,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:03,985 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:46:03,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:46:04,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:04,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:04,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 02:46:04,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:04,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:46:04,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:04,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2022-11-03 02:46:04,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:46:04,357 INFO L356 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-03 02:46:04,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 423 treesize of output 398 [2022-11-03 02:46:04,455 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 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:46:04,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:46:04,553 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:46:04,554 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 65 treesize of output 53 [2022-11-03 02:46:04,716 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:46:04,717 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 65 treesize of output 63 [2022-11-03 02:46:04,789 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:46:06,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '446#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (= |ULTIMATE.start_main_#t~mem11#1| 0) 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:46:06,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:46:06,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:46:06,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-03 02:46:06,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125797981] [2022-11-03 02:46:06,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:06,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:46:06,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:06,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:46:06,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:46:06,422 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 02:46:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:06,696 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-11-03 02:46:06,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:46:06,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 02:46:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:06,698 INFO L225 Difference]: With dead ends: 35 [2022-11-03 02:46:06,698 INFO L226 Difference]: Without dead ends: 23 [2022-11-03 02:46:06,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:46:06,699 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:06,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 13 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:46:06,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-03 02:46:06,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2022-11-03 02:46:06,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 02:46:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-03 02:46:06,704 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-11-03 02:46:06,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:06,704 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-03 02:46:06,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 02:46:06,704 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-03 02:46:06,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:46:06,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:06,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:06,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:06,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:06,915 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:06,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1182090675, now seen corresponding path program 4 times [2022-11-03 02:46:06,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:06,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943961994] [2022-11-03 02:46:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:06,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:06,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:46:06,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874132795] [2022-11-03 02:46:06,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:46:06,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:06,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:06,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:06,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:46:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:07,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:46:07,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:07,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:46:07,191 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 02:46:07,338 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 02:46:07,770 INFO L356 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2022-11-03 02:46:07,770 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 25 treesize of output 28 [2022-11-03 02:46:07,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:07,989 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 25 treesize of output 24 [2022-11-03 02:46:08,251 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 34 treesize of output 22 [2022-11-03 02:46:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:08,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:11,027 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse8 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse6 (mod .cse8 c_~N~0)) (.cse4 (< c_~N~0 0))) (let ((.cse2 (not .cse4)) (.cse5 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse0 (= .cse6 0)) (.cse1 (< .cse8 0))) (and (or (and (not .cse0) .cse1) (let ((.cse3 (forall ((v_ArrVal_135 Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_95| Int)) (or (= (select (store (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) .cse5 .cse6) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_95| 4)) v_ArrVal_135) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (not (<= .cse7 |v_ULTIMATE.start_main_~i~0#1_95|)))))) (and (or .cse2 .cse3) (or .cse3 .cse4)))) (or (and (or .cse2 (forall ((v_ArrVal_135 Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_95| Int)) (or (= (select (store (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) .cse5 (+ c_~N~0 .cse6)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_95| 4)) v_ArrVal_135) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (not (<= .cse7 |v_ULTIMATE.start_main_~i~0#1_95|))))) (or (forall ((v_ArrVal_135 Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_95| Int)) (or (= (select (store (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) .cse5 (+ .cse6 (* (- 1) c_~N~0))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_95| 4)) v_ArrVal_135) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (not (<= .cse7 |v_ULTIMATE.start_main_~i~0#1_95|)))) .cse4)) .cse0 (not .cse1)))))) is different from false [2022-11-03 02:46:11,902 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:46:11,902 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2022-11-03 02:46:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 02:46:11,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:11,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943961994] [2022-11-03 02:46:11,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:46:11,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874132795] [2022-11-03 02:46:11,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874132795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:11,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1114606467] [2022-11-03 02:46:11,909 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:46:11,909 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:46:11,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:46:11,910 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:46:11,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:46:11,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:11,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:11,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:12,300 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:46:12,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:46:12,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:12,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:46:12,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:12,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:12,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 02:46:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:12,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2022-11-03 02:46:12,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:46:12,666 INFO L356 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-03 02:46:12,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 423 treesize of output 398 [2022-11-03 02:46:12,766 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 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:46:12,849 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:46:12,849 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 60 treesize of output 48 [2022-11-03 02:46:12,999 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:46:13,000 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 65 treesize of output 63 [2022-11-03 02:46:13,074 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:46:15,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '603#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (= |ULTIMATE.start_main_#t~mem11#1| 0) 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:46:15,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:46:15,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:46:15,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-03 02:46:15,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120013708] [2022-11-03 02:46:15,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:15,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:46:15,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:46:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=382, Unknown=1, NotChecked=40, Total=506 [2022-11-03 02:46:15,102 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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 02:46:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:15,554 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-11-03 02:46:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:46:15,554 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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 02:46:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:15,556 INFO L225 Difference]: With dead ends: 28 [2022-11-03 02:46:15,556 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 02:46:15,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=97, Invalid=458, Unknown=1, NotChecked=44, Total=600 [2022-11-03 02:46:15,559 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:15,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-11-03 02:46:15,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 02:46:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2022-11-03 02:46:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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 02:46:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-03 02:46:15,567 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2022-11-03 02:46:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:15,567 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-03 02:46:15,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 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 02:46:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-03 02:46:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:46:15,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:15,568 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:15,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:15,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:46:15,769 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:15,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2001580160, now seen corresponding path program 5 times [2022-11-03 02:46:15,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:15,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167738951] [2022-11-03 02:46:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:15,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:15,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:46:15,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257035673] [2022-11-03 02:46:15,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:46:15,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:15,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:15,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:15,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:46:15,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:46:15,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:46:15,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:46:15,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:16,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:16,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:16,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167738951] [2022-11-03 02:46:16,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:46:16,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257035673] [2022-11-03 02:46:16,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257035673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:16,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203756465] [2022-11-03 02:46:16,395 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:46:16,395 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:46:16,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:46:16,396 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:46:16,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:46:16,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:16,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:16,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:16,749 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:46:16,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:46:16,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:16,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:16,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 02:46:16,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:16,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:46:16,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:16,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2022-11-03 02:46:16,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:46:17,073 INFO L356 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-03 02:46:17,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 423 treesize of output 398 [2022-11-03 02:46:17,175 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 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:46:17,250 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:46:17,250 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 60 treesize of output 48 [2022-11-03 02:46:17,396 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:46:17,397 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 65 treesize of output 63 [2022-11-03 02:46:17,464 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:46:19,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '769#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (= |ULTIMATE.start_main_#t~mem11#1| 0) 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:46:19,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:46:19,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:46:19,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-03 02:46:19,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570111302] [2022-11-03 02:46:19,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:19,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:46:19,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:19,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:46:19,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:46:19,230 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 11 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 02:46:19,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:19,591 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-11-03 02:46:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:46:19,592 INFO L78 Accepts]: Start accepts. Automaton has has 11 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) Word has length 12 [2022-11-03 02:46:19,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:19,593 INFO L225 Difference]: With dead ends: 56 [2022-11-03 02:46:19,593 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 02:46:19,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:46:19,595 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:19,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 27 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:46:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 02:46:19,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2022-11-03 02:46:19,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 02:46:19,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-03 02:46:19,606 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 12 [2022-11-03 02:46:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:19,607 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-03 02:46:19,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 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 02:46:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-03 02:46:19,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:46:19,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:19,608 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:19,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:19,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:46:19,809 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:19,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2060601037, now seen corresponding path program 6 times [2022-11-03 02:46:19,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:19,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849537803] [2022-11-03 02:46:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:19,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:19,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:46:19,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301908066] [2022-11-03 02:46:19,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:46:19,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:19,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:19,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:19,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:46:19,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:46:19,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:46:19,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:46:19,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:20,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:20,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:20,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849537803] [2022-11-03 02:46:20,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:46:20,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301908066] [2022-11-03 02:46:20,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301908066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:20,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1155691680] [2022-11-03 02:46:20,542 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:46:20,543 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:46:20,543 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:46:20,543 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:46:20,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:46:20,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:20,656 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:46:20,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2022-11-03 02:46:20,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:20,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:20,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:21,025 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:46:21,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:46:21,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:21,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 02:46:21,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:21,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2022-11-03 02:46:21,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:46:21,367 INFO L356 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-03 02:46:21,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 423 treesize of output 398 [2022-11-03 02:46:21,473 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 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:46:21,587 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:46:21,588 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 60 treesize of output 48 [2022-11-03 02:46:21,733 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:46:21,734 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 65 treesize of output 63 [2022-11-03 02:46:21,783 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:46:23,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '996#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (= |ULTIMATE.start_main_#t~mem11#1| 0) 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:46:23,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:46:23,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:46:23,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-11-03 02:46:23,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632682502] [2022-11-03 02:46:23,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:46:23,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:46:23,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:23,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:46:23,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:46:23,396 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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 02:46:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:24,863 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-11-03 02:46:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:46:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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 13 [2022-11-03 02:46:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:24,864 INFO L225 Difference]: With dead ends: 75 [2022-11-03 02:46:24,864 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 02:46:24,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:46:24,866 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:24,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 111 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:46:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 02:46:24,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 25. [2022-11-03 02:46:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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 02:46:24,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-03 02:46:24,876 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 13 [2022-11-03 02:46:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:24,876 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-03 02:46:24,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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 02:46:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-03 02:46:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:46:24,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:24,877 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:24,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:25,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:25,078 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:25,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:25,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2055930012, now seen corresponding path program 7 times [2022-11-03 02:46:25,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:25,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606837460] [2022-11-03 02:46:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:25,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:25,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:46:25,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194132405] [2022-11-03 02:46:25,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:46:25,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:25,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:25,091 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:25,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:46:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:25,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:46:25,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:25,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:46:25,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-11-03 02:46:25,371 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 25 treesize of output 13 [2022-11-03 02:46:25,477 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 25 treesize of output 13 [2022-11-03 02:46:25,611 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 25 treesize of output 13 [2022-11-03 02:46:25,897 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 25 treesize of output 20 [2022-11-03 02:46:26,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:26,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-03 02:46:26,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:46:26,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-03 02:46:26,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2022-11-03 02:46:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:46:26,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:50,897 WARN L234 SmtUtils]: Spent 54.55s on a formula simplification. DAG size of input: 71 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:52,165 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:47:52,166 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2022-11-03 02:47:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:47:52,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:52,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606837460] [2022-11-03 02:47:52,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:47:52,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194132405] [2022-11-03 02:47:52,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194132405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:52,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [453289970] [2022-11-03 02:47:52,169 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:47:52,169 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:47:52,170 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:47:52,170 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:47:52,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:47:52,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,499 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 02:47:52,499 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 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 02:47:52,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,613 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:47:52,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2022-11-03 02:47:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,989 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:47:52,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:47:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2022-11-03 02:47:53,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:53,283 INFO L356 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-03 02:47:53,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 423 treesize of output 398 [2022-11-03 02:47:53,384 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 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:47:53,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:53,635 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:47:53,636 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 65 treesize of output 53 [2022-11-03 02:47:54,026 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:47:54,027 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 65 treesize of output 63 [2022-11-03 02:47:54,085 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:47:56,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1265#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (= |ULTIMATE.start_main_#t~mem11#1| 0) 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:47:56,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:47:56,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:47:56,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-11-03 02:47:56,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143117788] [2022-11-03 02:47:56,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:56,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:47:56,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:56,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:47:56,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=576, Unknown=14, NotChecked=0, Total=702 [2022-11-03 02:47:56,435 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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 02:47:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:59,286 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-11-03 02:47:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:47:59,287 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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 13 [2022-11-03 02:47:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:59,288 INFO L225 Difference]: With dead ends: 43 [2022-11-03 02:47:59,288 INFO L226 Difference]: Without dead ends: 41 [2022-11-03 02:47:59,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 89.9s TimeCoverageRelationStatistics Valid=135, Invalid=720, Unknown=15, NotChecked=0, Total=870 [2022-11-03 02:47:59,290 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:59,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-11-03 02:47:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-03 02:47:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-11-03 02:47:59,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 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 02:47:59,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-11-03 02:47:59,306 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 13 [2022-11-03 02:47:59,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:59,306 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-11-03 02:47:59,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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 02:47:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-11-03 02:47:59,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 02:47:59,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:59,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:59,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:59,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:59,523 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:59,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1221265221, now seen corresponding path program 1 times [2022-11-03 02:47:59,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:59,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930570005] [2022-11-03 02:47:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:59,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:59,535 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:47:59,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953247569] [2022-11-03 02:47:59,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:59,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:59,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:59,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:59,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:47:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:59,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 02:47:59,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:59,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:47:59,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-11-03 02:47:59,779 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 28 treesize of output 16 [2022-11-03 02:47:59,891 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 28 treesize of output 16 [2022-11-03 02:48:00,135 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 47 treesize of output 38 [2022-11-03 02:48:00,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:00,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 72 [2022-11-03 02:48:14,696 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:48:14,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 160 [2022-11-03 02:48:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:16,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:20,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:48:20,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930570005] [2022-11-03 02:48:20,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:48:20,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953247569] [2022-11-03 02:48:20,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953247569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:20,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1504924820] [2022-11-03 02:48:20,459 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:48:20,459 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:48:20,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:48:20,460 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:48:20,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:48:20,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:20,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:20,819 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 02:48:20,819 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 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 02:48:20,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:20,914 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:48:20,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2022-11-03 02:48:20,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:20,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:21,282 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:48:21,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:48:21,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:21,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2022-11-03 02:48:21,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:21,545 INFO L356 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-03 02:48:21,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 423 treesize of output 398 [2022-11-03 02:48:21,634 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 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:48:21,821 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:48:21,823 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 60 treesize of output 48 [2022-11-03 02:48:22,149 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:48:22,149 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 65 treesize of output 63 [2022-11-03 02:48:22,221 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:48:25,096 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1508#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (= |ULTIMATE.start_main_#t~mem11#1| 0) 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:48:25,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:48:25,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:48:25,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-11-03 02:48:25,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904798221] [2022-11-03 02:48:25,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:25,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:48:25,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:48:25,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:48:25,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:48:25,099 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 23 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 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 02:48:29,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:29,108 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2022-11-03 02:48:29,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:48:29,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 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) Word has length 14 [2022-11-03 02:48:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:29,109 INFO L225 Difference]: With dead ends: 49 [2022-11-03 02:48:29,109 INFO L226 Difference]: Without dead ends: 39 [2022-11-03 02:48:29,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:48:29,111 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:29,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 0 Unknown, 11 Unchecked, 0.6s Time] [2022-11-03 02:48:29,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-03 02:48:29,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-11-03 02:48:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 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 02:48:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-11-03 02:48:29,135 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 14 [2022-11-03 02:48:29,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:29,135 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-11-03 02:48:29,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 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 02:48:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-11-03 02:48:29,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:48:29,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:29,137 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:29,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:29,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:48:29,362 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:29,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2127742547, now seen corresponding path program 8 times [2022-11-03 02:48:29,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:48:29,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144964700] [2022-11-03 02:48:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:29,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:48:29,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:48:29,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477443652] [2022-11-03 02:48:29,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:48:29,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:29,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:29,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:29,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:48:29,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:48:29,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:29,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:48:29,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:30,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:30,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:48:30,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144964700] [2022-11-03 02:48:30,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:48:30,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477443652] [2022-11-03 02:48:30,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477443652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:30,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1978545213] [2022-11-03 02:48:30,843 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:48:30,843 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:48:30,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:48:30,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:48:30,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:48:30,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:30,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:30,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:31,293 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:48:31,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:48:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:31,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:31,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 02:48:31,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:31,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:48:31,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:31,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2022-11-03 02:48:31,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:31,614 INFO L356 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-03 02:48:31,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 423 treesize of output 398 [2022-11-03 02:48:31,692 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 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:48:31,852 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:48:31,852 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 60 treesize of output 48 [2022-11-03 02:48:32,196 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:48:32,196 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 65 treesize of output 63 [2022-11-03 02:48:32,245 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:48:34,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1782#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (= |ULTIMATE.start_main_#t~mem11#1| 0) 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:48:34,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:48:34,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:48:34,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2022-11-03 02:48:34,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125844367] [2022-11-03 02:48:34,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:34,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:48:34,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:48:34,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:48:34,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:48:34,244 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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 02:48:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:36,747 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2022-11-03 02:48:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:48:36,749 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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 17 [2022-11-03 02:48:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:36,749 INFO L225 Difference]: With dead ends: 118 [2022-11-03 02:48:36,750 INFO L226 Difference]: Without dead ends: 106 [2022-11-03 02:48:36,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=372, Invalid=1434, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:48:36,751 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 127 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:36,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 193 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:48:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-03 02:48:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 41. [2022-11-03 02:48:36,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 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 02:48:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-11-03 02:48:36,788 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 17 [2022-11-03 02:48:36,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:36,788 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-11-03 02:48:36,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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 02:48:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-11-03 02:48:36,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:48:36,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:36,792 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:36,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:37,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:48:37,019 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:37,019 INFO L85 PathProgramCache]: Analyzing trace with hash -313628308, now seen corresponding path program 2 times [2022-11-03 02:48:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:48:37,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365635956] [2022-11-03 02:48:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:37,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:48:37,048 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:48:37,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474849765] [2022-11-03 02:48:37,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:48:37,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:37,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:37,051 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:37,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:48:37,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:48:37,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:37,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:48:37,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:48:37,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:48:38,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:48:38,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365635956] [2022-11-03 02:48:38,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:48:38,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474849765] [2022-11-03 02:48:38,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474849765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:48:38,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073669473] [2022-11-03 02:48:38,293 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:48:38,293 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:48:38,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:48:38,293 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:48:38,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:48:38,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,687 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:48:38,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:48:38,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:48:38,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 02:48:38,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:38,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2022-11-03 02:48:38,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:39,068 INFO L356 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-03 02:48:39,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 423 treesize of output 398 [2022-11-03 02:48:39,173 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 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:48:39,287 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:48:39,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-11-03 02:48:39,609 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:48:39,609 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 65 treesize of output 63 [2022-11-03 02:48:39,724 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:48:42,229 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2184#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (= |ULTIMATE.start_main_#t~mem11#1| 0) 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:48:42,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:48:42,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:48:42,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-11-03 02:48:42,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384712280] [2022-11-03 02:48:42,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:42,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:48:42,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:48:42,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:48:42,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:48:42,234 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 02:48:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:48:43,245 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2022-11-03 02:48:43,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:48:43,246 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) Word has length 18 [2022-11-03 02:48:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:48:43,247 INFO L225 Difference]: With dead ends: 104 [2022-11-03 02:48:43,247 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 02:48:43,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:48:43,248 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 124 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:43,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 46 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:48:43,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 02:48:43,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 54. [2022-11-03 02:48:43,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 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 02:48:43,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-11-03 02:48:43,278 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 18 [2022-11-03 02:48:43,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:48:43,278 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-11-03 02:48:43,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 02:48:43,278 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-11-03 02:48:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:48:43,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:48:43,279 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:48:43,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-03 02:48:43,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:43,499 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:48:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:48:43,499 INFO L85 PathProgramCache]: Analyzing trace with hash -622221299, now seen corresponding path program 9 times [2022-11-03 02:48:43,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:48:43,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157854714] [2022-11-03 02:48:43,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:48:43,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:48:43,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:48:43,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216251382] [2022-11-03 02:48:43,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:48:43,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:43,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:43,517 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:43,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:48:43,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:48:43,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:48:43,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:48:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:43,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-11-03 02:48:43,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:48:43,875 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 25 treesize of output 13 [2022-11-03 02:48:44,008 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 25 treesize of output 13 [2022-11-03 02:48:44,118 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 25 treesize of output 13 [2022-11-03 02:48:44,270 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 25 treesize of output 13 [2022-11-03 02:48:44,417 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 25 treesize of output 13 [2022-11-03 02:48:44,546 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 25 treesize of output 13 [2022-11-03 02:48:44,881 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 25 treesize of output 20 [2022-11-03 02:48:45,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:45,118 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:48:45,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-03 02:48:45,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:45,381 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:48:45,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-03 02:48:45,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:45,628 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:48:45,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-03 02:48:45,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:45,885 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:48:45,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-03 02:48:46,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:46,134 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:48:46,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-03 02:48:46,574 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:48:46,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 41 treesize of output 29 [2022-11-03 02:48:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:46,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:19,742 WARN L234 SmtUtils]: Spent 19.26s on a formula simplification. DAG size of input: 103 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:49:29,351 WARN L234 SmtUtils]: Spent 8.97s on a formula simplification. DAG size of input: 72 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:49:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 32 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:34,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:34,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157854714] [2022-11-03 02:49:34,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:49:34,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216251382] [2022-11-03 02:49:34,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216251382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:49:34,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1408377018] [2022-11-03 02:49:34,812 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-03 02:49:34,812 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:49:34,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:49:34,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:49:34,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:49:34,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:34,914 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:49:34,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2022-11-03 02:49:34,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:34,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:35,234 INFO L356 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-03 02:49:35,234 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 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-03 02:49:35,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:35,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:35,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:35,620 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:49:35,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:49:35,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:35,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2022-11-03 02:49:35,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:35,874 INFO L356 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-03 02:49:35,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 423 treesize of output 398 [2022-11-03 02:49:35,967 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 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:49:36,074 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:49:36,075 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 60 treesize of output 48 [2022-11-03 02:49:36,426 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:49:36,426 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 65 treesize of output 63 [2022-11-03 02:49:36,493 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:49:40,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2593#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (= |ULTIMATE.start_main_#t~mem11#1| 0) 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:49:40,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:49:40,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:49:40,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2022-11-03 02:49:40,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224758842] [2022-11-03 02:49:40,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:49:40,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 02:49:40,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:40,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 02:49:40,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1169, Unknown=4, NotChecked=0, Total=1406 [2022-11-03 02:49:40,361 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 33 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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 02:50:16,857 WARN L234 SmtUtils]: Spent 19.92s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:45,234 WARN L234 SmtUtils]: Spent 18.45s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:50:59,569 WARN L234 SmtUtils]: Spent 9.37s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:51:12,817 WARN L234 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:51:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:13,803 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2022-11-03 02:51:13,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 02:51:13,804 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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 19 [2022-11-03 02:51:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:13,805 INFO L225 Difference]: With dead ends: 85 [2022-11-03 02:51:13,806 INFO L226 Difference]: Without dead ends: 83 [2022-11-03 02:51:13,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 143.3s TimeCoverageRelationStatistics Valid=377, Invalid=1872, Unknown=7, NotChecked=0, Total=2256 [2022-11-03 02:51:13,807 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:13,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 51 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 192 Invalid, 0 Unknown, 197 Unchecked, 0.8s Time] [2022-11-03 02:51:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-03 02:51:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2022-11-03 02:51:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 60 states have internal predecessors, (74), 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 02:51:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2022-11-03 02:51:13,851 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 19 [2022-11-03 02:51:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:13,852 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2022-11-03 02:51:13,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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 02:51:13,852 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2022-11-03 02:51:13,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:51:13,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:13,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:13,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:51:14,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:51:14,063 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:14,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1173097116, now seen corresponding path program 3 times [2022-11-03 02:51:14,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:14,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778673667] [2022-11-03 02:51:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:14,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:14,077 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:51:14,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757222310] [2022-11-03 02:51:14,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:51:14,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:14,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:14,079 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:14,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:51:14,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:51:14,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:51:14,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 02:51:14,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:14,221 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 6 treesize of output 5 [2022-11-03 02:51:14,424 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 02:51:14,424 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 160 treesize of output 125 [2022-11-03 02:51:16,038 INFO L356 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2022-11-03 02:51:16,039 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 2 case distinctions, treesize of input 208 treesize of output 152 [2022-11-03 02:51:20,077 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:51:20,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 60 treesize of output 30 [2022-11-03 02:51:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:51:20,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:52:14,050 WARN L234 SmtUtils]: Spent 15.26s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:52:14,107 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 477 treesize of output 429 [2022-11-03 02:52:14,219 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:52:14,219 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 1335 treesize of output 1251 [2022-11-03 02:52:16,791 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 453 treesize of output 405 [2022-11-03 02:52:16,903 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:52:16,904 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 1433 treesize of output 1349 [2022-11-03 02:52:18,503 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 408 treesize of output 364 [2022-11-03 02:52:18,593 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:52:18,593 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 1344 treesize of output 1256 [2022-11-03 02:52:21,492 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 401 treesize of output 357 [2022-11-03 02:52:21,821 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:52:21,822 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 1587 treesize of output 1479 [2022-11-03 02:52:34,173 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-11-03 02:52:34,200 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 401 treesize of output 357 [2022-11-03 02:52:34,320 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:52:34,321 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 1353 treesize of output 1267 [2022-11-03 02:52:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:52:37,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:37,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778673667] [2022-11-03 02:52:37,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:52:37,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757222310] [2022-11-03 02:52:37,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757222310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:52:37,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1362404596] [2022-11-03 02:52:37,616 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:52:37,616 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:52:37,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:52:37,617 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:52:37,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:52:37,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:37,760 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:52:37,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2022-11-03 02:52:37,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:37,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:37,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:38,182 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:52:38,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:52:38,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:38,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:38,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 02:52:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:38,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2022-11-03 02:52:38,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:52:38,499 INFO L356 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-03 02:52:38,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 423 treesize of output 398 [2022-11-03 02:52:38,580 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 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:52:38,761 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:52:38,761 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 60 treesize of output 48 [2022-11-03 02:52:39,086 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:52:39,087 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 65 treesize of output 63 [2022-11-03 02:52:39,204 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:52:55,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2998#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (= |ULTIMATE.start_main_#t~mem11#1| 0) 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:52:55,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:52:55,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:52:55,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-11-03 02:52:55,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504255560] [2022-11-03 02:52:55,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:52:55,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:52:55,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:55,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:52:55,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=496, Unknown=13, NotChecked=0, Total=600 [2022-11-03 02:52:55,101 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 02:52:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:55,448 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-11-03 02:52:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:52:55,448 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 19 [2022-11-03 02:52:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:55,449 INFO L225 Difference]: With dead ends: 70 [2022-11-03 02:52:55,449 INFO L226 Difference]: Without dead ends: 56 [2022-11-03 02:52:55,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 71.8s TimeCoverageRelationStatistics Valid=91, Invalid=496, Unknown=13, NotChecked=0, Total=600 [2022-11-03 02:52:55,450 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:55,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time] [2022-11-03 02:52:55,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-03 02:52:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-11-03 02:52:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 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 02:52:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-11-03 02:52:55,481 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 19 [2022-11-03 02:52:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:55,482 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-11-03 02:52:55,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 02:52:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-11-03 02:52:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:52:55,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:55,483 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:55,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-03 02:52:55,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:52:55,711 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:55,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:55,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1824011028, now seen corresponding path program 4 times [2022-11-03 02:52:55,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:55,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620022415] [2022-11-03 02:52:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:55,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:55,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:52:55,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429177702] [2022-11-03 02:52:55,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:52:55,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:52:55,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:52:55,742 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:52:55,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:52:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:55,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:52:55,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:52:55,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:52:55,955 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 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-03 02:52:56,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-03 02:52:56,165 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 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-03 02:52:56,253 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 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-03 02:52:56,369 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 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-03 02:52:56,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:56,620 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 25 treesize of output 20 [2022-11-03 02:52:56,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:56,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-11-03 02:52:57,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:57,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:57,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:57,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:57,232 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 0 case distinctions, treesize of input 51 treesize of output 48 [2022-11-03 02:52:57,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:57,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:57,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:57,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:57,508 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 0 case distinctions, treesize of input 51 treesize of output 48 [2022-11-03 02:52:57,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:57,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:57,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:57,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:57,817 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 0 case distinctions, treesize of input 51 treesize of output 48 [2022-11-03 02:52:59,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:52:59,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 33 [2022-11-03 02:52:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:52:59,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:41,173 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse13 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse6 (< c_~N~0 0)) (.cse5 (mod .cse13 c_~N~0))) (let ((.cse9 (= .cse5 0)) (.cse10 (< .cse13 0)) (.cse7 (not .cse6)) (.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (and (or (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int) (|v_ULTIMATE.start_main_~i~0#1_313| Int) (v_ArrVal_609 Int) (v_ArrVal_607 Int) (v_ArrVal_612 Int)) (let ((.cse1 (store (store (store (store .cse3 .cse4 (+ .cse5 (* (- 1) c_~N~0))) (+ (* |v_ULTIMATE.start_main_~i~0#1_313| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_607) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_609) (+ (* |v_ULTIMATE.start_main_~i~0#1_311| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_612))) (or (not (<= .cse0 |v_ULTIMATE.start_main_~i~0#1_313|)) (= (select .cse1 .cse2) 0) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_313| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|)) (not (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))) .cse6) (or .cse7 (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int) (|v_ULTIMATE.start_main_~i~0#1_313| Int) (v_ArrVal_609 Int) (v_ArrVal_607 Int) (v_ArrVal_612 Int)) (let ((.cse8 (store (store (store (store .cse3 .cse4 (+ c_~N~0 .cse5)) (+ (* |v_ULTIMATE.start_main_~i~0#1_313| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_607) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_609) (+ (* |v_ULTIMATE.start_main_~i~0#1_311| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_612))) (or (not (<= .cse0 |v_ULTIMATE.start_main_~i~0#1_313|)) (= (select .cse8 .cse2) 0) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_313| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|)) (not (= (select .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))))) .cse9 (not .cse10)) (or (and (not .cse9) .cse10) (let ((.cse11 (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int) (|v_ULTIMATE.start_main_~i~0#1_313| Int) (v_ArrVal_609 Int) (v_ArrVal_607 Int) (v_ArrVal_612 Int)) (let ((.cse12 (store (store (store (store .cse3 .cse4 .cse5) (+ (* |v_ULTIMATE.start_main_~i~0#1_313| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_607) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_609) (+ (* |v_ULTIMATE.start_main_~i~0#1_311| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_612))) (or (not (<= .cse0 |v_ULTIMATE.start_main_~i~0#1_313|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_313| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (= (select .cse12 .cse2) 0) (not (= (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|))))))) (and (or .cse7 .cse11) (or .cse11 .cse6)))))))) is different from false [2022-11-03 02:54:53,752 WARN L234 SmtUtils]: Spent 1.06m on a formula simplification that was a NOOP. DAG size: 149 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:55:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 14 refuted. 6 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-03 02:55:11,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:55:11,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620022415] [2022-11-03 02:55:11,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:55:11,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429177702] [2022-11-03 02:55:11,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429177702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:55:11,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1152244748] [2022-11-03 02:55:11,917 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:55:11,917 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:55:11,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:55:11,917 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:55:11,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:55:11,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:11,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:12,265 INFO L356 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-03 02:55:12,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-03 02:55:12,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:12,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-03 02:55:12,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:12,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:12,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-03 02:55:12,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:55:12,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 25 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2022-11-03 02:55:12,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:55:12,552 INFO L356 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2022-11-03 02:55:12,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 423 treesize of output 398 [2022-11-03 02:55:12,627 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 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-03 02:55:12,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:55:12,820 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:55:12,820 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 65 treesize of output 53 [2022-11-03 02:55:13,022 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 02:55:13,022 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 65 treesize of output 63 [2022-11-03 02:55:13,130 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:55:18,729 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3361#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (= |ULTIMATE.start_main_#t~mem11#1| 0) 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) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-03 02:55:18,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:55:18,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:55:18,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2022-11-03 02:55:18,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390094579] [2022-11-03 02:55:18,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:55:18,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 02:55:18,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:55:18,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 02:55:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1227, Unknown=22, NotChecked=74, Total=1560 [2022-11-03 02:55:18,732 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 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 02:55:31,782 WARN L234 SmtUtils]: Spent 11.09s on a formula simplification. DAG size of input: 155 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:55:33,832 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse13 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse6 (< c_~N~0 0)) (.cse5 (mod .cse13 c_~N~0))) (let ((.cse9 (= .cse5 0)) (.cse10 (< .cse13 0)) (.cse7 (not .cse6)) (.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (not (<= c_~N~0 0)) (or (and (or (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int) (|v_ULTIMATE.start_main_~i~0#1_313| Int) (v_ArrVal_609 Int) (v_ArrVal_607 Int) (v_ArrVal_612 Int)) (let ((.cse1 (store (store (store (store .cse3 .cse4 (+ .cse5 (* (- 1) c_~N~0))) (+ (* |v_ULTIMATE.start_main_~i~0#1_313| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_607) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_609) (+ (* |v_ULTIMATE.start_main_~i~0#1_311| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_612))) (or (not (<= .cse0 |v_ULTIMATE.start_main_~i~0#1_313|)) (= (select .cse1 .cse2) 0) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_313| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|)) (not (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))) .cse6) (or .cse7 (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int) (|v_ULTIMATE.start_main_~i~0#1_313| Int) (v_ArrVal_609 Int) (v_ArrVal_607 Int) (v_ArrVal_612 Int)) (let ((.cse8 (store (store (store (store .cse3 .cse4 (+ c_~N~0 .cse5)) (+ (* |v_ULTIMATE.start_main_~i~0#1_313| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_607) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_609) (+ (* |v_ULTIMATE.start_main_~i~0#1_311| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_612))) (or (not (<= .cse0 |v_ULTIMATE.start_main_~i~0#1_313|)) (= (select .cse8 .cse2) 0) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_313| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|)) (not (= (select .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))))) .cse9 (not .cse10)) (= .cse5 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|)) (<= (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.base|) (or (and (not .cse9) .cse10) (let ((.cse11 (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int) (|v_ULTIMATE.start_main_~i~0#1_313| Int) (v_ArrVal_609 Int) (v_ArrVal_607 Int) (v_ArrVal_612 Int)) (let ((.cse12 (store (store (store (store .cse3 .cse4 .cse5) (+ (* |v_ULTIMATE.start_main_~i~0#1_313| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_607) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_609) (+ (* |v_ULTIMATE.start_main_~i~0#1_311| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_612))) (or (not (<= .cse0 |v_ULTIMATE.start_main_~i~0#1_313|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_313| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (= (select .cse12 .cse2) 0) (not (= (select .cse12 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|))))))) (and (or .cse7 .cse11) (or .cse11 .cse6)))) (<= 5 .cse13) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2022-11-03 02:55:35,861 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse15 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse6 (< c_~N~0 0)) (.cse5 (mod .cse15 c_~N~0))) (let ((.cse9 (= .cse5 0)) (.cse10 (< .cse15 0)) (.cse7 (not .cse6)) (.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (and (or (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int) (|v_ULTIMATE.start_main_~i~0#1_313| Int) (v_ArrVal_609 Int) (v_ArrVal_607 Int) (v_ArrVal_612 Int)) (let ((.cse1 (store (store (store (store .cse3 .cse4 (+ .cse5 (* (- 1) c_~N~0))) (+ (* |v_ULTIMATE.start_main_~i~0#1_313| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_607) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_609) (+ (* |v_ULTIMATE.start_main_~i~0#1_311| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_612))) (or (not (<= .cse0 |v_ULTIMATE.start_main_~i~0#1_313|)) (= (select .cse1 .cse2) 0) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_313| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|)) (not (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))) .cse6) (or .cse7 (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int) (|v_ULTIMATE.start_main_~i~0#1_313| Int) (v_ArrVal_609 Int) (v_ArrVal_607 Int) (v_ArrVal_612 Int)) (let ((.cse8 (store (store (store (store .cse3 .cse4 (+ c_~N~0 .cse5)) (+ (* |v_ULTIMATE.start_main_~i~0#1_313| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_607) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_609) (+ (* |v_ULTIMATE.start_main_~i~0#1_311| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_612))) (or (not (<= .cse0 |v_ULTIMATE.start_main_~i~0#1_313|)) (= (select .cse8 .cse2) 0) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_313| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|)) (not (= (select .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))))) .cse9 (not .cse10)) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse11 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse12 (mod .cse11 ~N~0))) (and (<= 5 .cse11) (= .cse12 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (<= ~N~0 0)) (<= (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.base|) (= .cse12 (select .cse3 .cse2)))))) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (or (and (not .cse9) .cse10) (let ((.cse13 (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int) (|v_ULTIMATE.start_main_~i~0#1_313| Int) (v_ArrVal_609 Int) (v_ArrVal_607 Int) (v_ArrVal_612 Int)) (let ((.cse14 (store (store (store (store .cse3 .cse4 .cse5) (+ (* |v_ULTIMATE.start_main_~i~0#1_313| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_607) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_609) (+ (* |v_ULTIMATE.start_main_~i~0#1_311| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_612))) (or (not (<= .cse0 |v_ULTIMATE.start_main_~i~0#1_313|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_313| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (= (select .cse14 .cse2) 0) (not (= (select .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|))))))) (and (or .cse7 .cse13) (or .cse13 .cse6)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))))) is different from false [2022-11-03 02:55:37,884 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse15 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse6 (< c_~N~0 0)) (.cse5 (mod .cse15 c_~N~0))) (let ((.cse9 (= .cse5 0)) (.cse10 (< .cse15 0)) (.cse7 (not .cse6)) (.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (and (or (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int) (|v_ULTIMATE.start_main_~i~0#1_313| Int) (v_ArrVal_609 Int) (v_ArrVal_607 Int) (v_ArrVal_612 Int)) (let ((.cse1 (store (store (store (store .cse3 .cse4 (+ .cse5 (* (- 1) c_~N~0))) (+ (* |v_ULTIMATE.start_main_~i~0#1_313| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_607) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_609) (+ (* |v_ULTIMATE.start_main_~i~0#1_311| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_612))) (or (not (<= .cse0 |v_ULTIMATE.start_main_~i~0#1_313|)) (= (select .cse1 .cse2) 0) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_313| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|)) (not (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))) .cse6) (or .cse7 (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int) (|v_ULTIMATE.start_main_~i~0#1_313| Int) (v_ArrVal_609 Int) (v_ArrVal_607 Int) (v_ArrVal_612 Int)) (let ((.cse8 (store (store (store (store .cse3 .cse4 (+ c_~N~0 .cse5)) (+ (* |v_ULTIMATE.start_main_~i~0#1_313| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_607) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_609) (+ (* |v_ULTIMATE.start_main_~i~0#1_311| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_612))) (or (not (<= .cse0 |v_ULTIMATE.start_main_~i~0#1_313|)) (= (select .cse8 .cse2) 0) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_313| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|)) (not (= (select .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))))) .cse9 (not .cse10)) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse11 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse12 (mod .cse11 ~N~0))) (and (<= 5 .cse11) (= .cse12 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (<= ~N~0 0)) (<= (+ 2 |c_ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.base|) (= .cse12 (select .cse3 .cse2)))))) (or (and (not .cse9) .cse10) (let ((.cse13 (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int) (|v_ULTIMATE.start_main_~i~0#1_313| Int) (v_ArrVal_609 Int) (v_ArrVal_607 Int) (v_ArrVal_612 Int)) (let ((.cse14 (store (store (store (store .cse3 .cse4 .cse5) (+ (* |v_ULTIMATE.start_main_~i~0#1_313| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_607) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_609) (+ (* |v_ULTIMATE.start_main_~i~0#1_311| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_612))) (or (not (<= .cse0 |v_ULTIMATE.start_main_~i~0#1_313|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_313| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (= (select .cse14 .cse2) 0) (not (= (select .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|))))))) (and (or .cse7 .cse13) (or .cse13 .cse6)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 4 |c_ULTIMATE.start_main_~i~0#1|))))) is different from false [2022-11-03 02:55:38,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:55:38,098 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2022-11-03 02:55:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:55:38,099 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 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 02:55:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:55:38,100 INFO L225 Difference]: With dead ends: 68 [2022-11-03 02:55:38,100 INFO L226 Difference]: Without dead ends: 66 [2022-11-03 02:55:38,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 11 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 155.3s TimeCoverageRelationStatistics Valid=264, Invalid=1367, Unknown=25, NotChecked=324, Total=1980 [2022-11-03 02:55:38,101 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:55:38,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 27 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-11-03 02:55:38,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-03 02:55:38,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2022-11-03 02:55:38,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.25) internal successors, (70), 56 states have internal predecessors, (70), 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 02:55:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2022-11-03 02:55:38,147 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 20 [2022-11-03 02:55:38,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:55:38,147 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2022-11-03 02:55:38,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 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 02:55:38,148 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2022-11-03 02:55:38,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:55:38,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:55:38,149 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:55:38,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:55:38,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:38,375 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:55:38,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:55:38,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2028439149, now seen corresponding path program 5 times [2022-11-03 02:55:38,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:55:38,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484173356] [2022-11-03 02:55:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:55:38,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:55:38,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:55:38,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45322902] [2022-11-03 02:55:38,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:55:38,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:55:38,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:55:38,388 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:55:38,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e7691cf-d4a1-4ce2-918e-5e73c9573985/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:55:38,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:55:38,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:55:38,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:55:38,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:55:38,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-11-03 02:55:39,066 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 75 treesize of output 54 [2022-11-03 02:55:39,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 94 [2022-11-03 02:55:43,784 INFO L356 Elim1Store]: treesize reduction 92, result has 69.3 percent of original size [2022-11-03 02:55:43,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 160 treesize of output 287