./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5d98532a5d518c1ba99a39e0965faf5a69d8ad5bf82f7713684141895d3e8815 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:00:16,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:00:16,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:00:16,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:00:16,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:00:16,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:00:16,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:00:16,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:00:16,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:00:16,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:00:16,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:00:16,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:00:16,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:00:16,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:00:16,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:00:16,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:00:16,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:00:16,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:00:16,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:00:16,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:00:16,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:00:16,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:00:16,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:00:16,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:00:16,734 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:00:16,734 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:00:16,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:00:16,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:00:16,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:00:16,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:00:16,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:00:16,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:00:16,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:00:16,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:00:16,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:00:16,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:00:16,746 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:00:16,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:00:16,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:00:16,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:00:16,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:00:16,754 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:00:16,776 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:00:16,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:00:16,777 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:00:16,777 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:00:16,777 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:00:16,778 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:00:16,778 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:00:16,778 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:00:16,778 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:00:16,779 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:00:16,779 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:00:16,779 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:00:16,779 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:00:16,780 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:00:16,780 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:00:16,780 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:00:16,781 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:00:16,781 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:00:16,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:00:16,782 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:00:16,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:00:16,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:00:16,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:00:16,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:00:16,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:00:16,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:00:16,784 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:00:16,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:00:16,784 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:00:16,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:00:16,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:00:16,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:00:16,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:00:16,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:00:16,786 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:00:16,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:00:16,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:00:16,786 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:00:16,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:00:16,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:00:16,787 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:00:16,787 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_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d98532a5d518c1ba99a39e0965faf5a69d8ad5bf82f7713684141895d3e8815 [2022-11-19 08:00:17,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:00:17,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:00:17,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:00:17,157 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:00:17,158 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:00:17,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-programs/partial_mod_count_2.c [2022-11-19 08:00:17,243 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/data/3f2a10cac/05b5123dcc4c45d19d9826972f36a4b2/FLAGbf2df6606 [2022-11-19 08:00:17,871 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:00:17,872 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/sv-benchmarks/c/array-programs/partial_mod_count_2.c [2022-11-19 08:00:17,879 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/data/3f2a10cac/05b5123dcc4c45d19d9826972f36a4b2/FLAGbf2df6606 [2022-11-19 08:00:18,215 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/data/3f2a10cac/05b5123dcc4c45d19d9826972f36a4b2 [2022-11-19 08:00:18,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:00:18,224 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:00:18,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:00:18,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:00:18,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:00:18,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:18" (1/1) ... [2022-11-19 08:00:18,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@db06659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18, skipping insertion in model container [2022-11-19 08:00:18,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:18" (1/1) ... [2022-11-19 08:00:18,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:00:18,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:00:18,454 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/sv-benchmarks/c/array-programs/partial_mod_count_2.c[323,336] [2022-11-19 08:00:18,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:00:18,492 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:00:18,506 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/sv-benchmarks/c/array-programs/partial_mod_count_2.c[323,336] [2022-11-19 08:00:18,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:00:18,533 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:00:18,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18 WrapperNode [2022-11-19 08:00:18,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:00:18,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:00:18,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:00:18,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:00:18,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18" (1/1) ... [2022-11-19 08:00:18,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18" (1/1) ... [2022-11-19 08:00:18,568 INFO L138 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-11-19 08:00:18,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:00:18,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:00:18,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:00:18,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:00:18,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18" (1/1) ... [2022-11-19 08:00:18,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18" (1/1) ... [2022-11-19 08:00:18,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18" (1/1) ... [2022-11-19 08:00:18,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18" (1/1) ... [2022-11-19 08:00:18,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18" (1/1) ... [2022-11-19 08:00:18,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18" (1/1) ... [2022-11-19 08:00:18,593 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18" (1/1) ... [2022-11-19 08:00:18,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18" (1/1) ... [2022-11-19 08:00:18,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:00:18,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:00:18,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:00:18,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:00:18,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18" (1/1) ... [2022-11-19 08:00:18,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:00:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:18,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:00:18,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:00:18,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:00:18,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:00:18,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:00:18,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:00:18,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:00:18,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:00:18,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:00:18,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:00:18,785 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:00:18,787 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:00:18,948 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:00:19,046 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:00:19,063 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 08:00:19,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:19 BoogieIcfgContainer [2022-11-19 08:00:19,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:00:19,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:00:19,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:00:19,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:00:19,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:18" (1/3) ... [2022-11-19 08:00:19,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f01aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:19, skipping insertion in model container [2022-11-19 08:00:19,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:18" (2/3) ... [2022-11-19 08:00:19,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f01aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:19, skipping insertion in model container [2022-11-19 08:00:19,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:19" (3/3) ... [2022-11-19 08:00:19,084 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_2.c [2022-11-19 08:00:19,108 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:00:19,108 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:00:19,156 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:00:19,163 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;@7e97327a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:00:19,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:00:19,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:00:19,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:19,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:00:19,177 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:19,183 INFO L85 PathProgramCache]: Analyzing trace with hash 83386259, now seen corresponding path program 1 times [2022-11-19 08:00:19,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:19,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267764709] [2022-11-19 08:00:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:19,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:19,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:19,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267764709] [2022-11-19 08:00:19,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267764709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:19,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:19,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:00:19,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700585524] [2022-11-19 08:00:19,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:19,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:00:19,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:19,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:00:19,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:00:19,586 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-19 08:00:19,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:19,668 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2022-11-19 08:00:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:00:19,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-11-19 08:00:19,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:19,678 INFO L225 Difference]: With dead ends: 15 [2022-11-19 08:00:19,678 INFO L226 Difference]: Without dead ends: 8 [2022-11-19 08:00:19,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:00:19,695 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:19,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:00:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-19 08:00:19,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-19 08:00:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-19 08:00:19,735 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-11-19 08:00:19,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:19,736 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-19 08:00:19,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-11-19 08:00:19,737 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-19 08:00:19,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:00:19,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:19,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:00:19,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:00:19,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:19,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:19,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1713456732, now seen corresponding path program 1 times [2022-11-19 08:00:19,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:19,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925631144] [2022-11-19 08:00:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:19,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:19,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:00:19,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290571420] [2022-11-19 08:00:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:19,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:19,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:19,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:19,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:00:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:19,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:00:19,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:19,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:19,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:20,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925631144] [2022-11-19 08:00:20,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:00:20,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290571420] [2022-11-19 08:00:20,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290571420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:20,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492690550] [2022-11-19 08:00:20,035 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-19 08:00:20,037 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:20,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:20,047 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:20,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:20,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:20,170 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:00:20,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:00:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:20,242 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:00:20,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:00:20,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:20,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:20,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-19 08:00:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:20,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:20,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2022-11-19 08:00:20,419 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 28 [2022-11-19 08:00:20,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:00:20,633 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-19 08:00:20,742 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:20,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1492690550] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:20,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:00:20,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2022-11-19 08:00:20,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773304626] [2022-11-19 08:00:20,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:20,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:00:20,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:20,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:00:20,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:00:20,965 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-19 08:00:21,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:21,008 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-11-19 08:00:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:00:21,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-11-19 08:00:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:21,010 INFO L225 Difference]: With dead ends: 13 [2022-11-19 08:00:21,010 INFO L226 Difference]: Without dead ends: 11 [2022-11-19 08:00:21,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:00:21,012 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:21,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:00:21,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-19 08:00:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2022-11-19 08:00:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2022-11-19 08:00:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-19 08:00:21,017 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-11-19 08:00:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:21,017 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-19 08:00:21,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-11-19 08:00:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-19 08:00:21,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:00:21,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:21,018 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:21,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:00:21,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:21,224 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:21,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:21,225 INFO L85 PathProgramCache]: Analyzing trace with hash 101935250, now seen corresponding path program 1 times [2022-11-19 08:00:21,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:21,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803993712] [2022-11-19 08:00:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:21,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:21,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:00:21,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990984940] [2022-11-19 08:00:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:21,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:21,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:21,239 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:21,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:00:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:21,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:00:21,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:00:21,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:00:21,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:21,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803993712] [2022-11-19 08:00:21,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:00:21,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990984940] [2022-11-19 08:00:21,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990984940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:21,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [853078134] [2022-11-19 08:00:21,364 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:00:21,364 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:21,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:21,365 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:21,365 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:21,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:21,411 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:00:21,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:00:21,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:21,458 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:00:21,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:00:21,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:21,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:21,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-19 08:00:21,546 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:21,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:21,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:21,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:21,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:00:21,798 INFO L321 Elim1Store]: treesize reduction 204, result has 18.7 percent of original size [2022-11-19 08:00:21,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 523 treesize of output 583 [2022-11-19 08:00:21,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:00:21,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 316 treesize of output 306 [2022-11-19 08:00:22,331 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:22,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:22,407 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-19 08:00:22,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 408 treesize of output 397 [2022-11-19 08:00:22,468 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 08:00:22,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 375 treesize of output 367 [2022-11-19 08:00:27,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:00:27,757 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-19 08:00:27,905 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:28,380 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= |ULTIMATE.start_main_~R~0#1| 2) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2 |ULTIMATE.start_main_~R~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 08:00:28,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:00:28,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:00:28,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-19 08:00:28,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177186410] [2022-11-19 08:00:28,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:28,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:00:28,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:28,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:00:28,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:00:28,383 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-19 08:00:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:28,422 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-11-19 08:00:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:00:28,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 [2022-11-19 08:00:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:28,424 INFO L225 Difference]: With dead ends: 20 [2022-11-19 08:00:28,424 INFO L226 Difference]: Without dead ends: 13 [2022-11-19 08:00:28,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:00:28,426 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:28,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:00:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-19 08:00:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-19 08:00:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-11-19 08:00:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-19 08:00:28,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2022-11-19 08:00:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:28,433 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-19 08:00:28,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-19 08:00:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-19 08:00:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:00:28,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:28,435 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:28,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:28,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:28,643 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:28,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:28,644 INFO L85 PathProgramCache]: Analyzing trace with hash 766862339, now seen corresponding path program 2 times [2022-11-19 08:00:28,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:28,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684723633] [2022-11-19 08:00:28,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:28,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:28,659 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:00:28,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876877834] [2022-11-19 08:00:28,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:00:28,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:28,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:28,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:28,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:00:28,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:00:28,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:00:28,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:00:28,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:29,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:00:29,018 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 45 [2022-11-19 08:00:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:00:29,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:29,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:00:29,395 INFO L350 Elim1Store]: Elim1 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 100 treesize of output 88 [2022-11-19 08:00:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:00:29,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:29,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684723633] [2022-11-19 08:00:29,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:00:29,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876877834] [2022-11-19 08:00:29,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876877834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:29,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880029604] [2022-11-19 08:00:29,728 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:00:29,728 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:29,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:29,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:29,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:29,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:29,770 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:00:29,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:00:29,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:29,821 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:00:29,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:00:29,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:29,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:29,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-19 08:00:29,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:29,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 81 [2022-11-19 08:00:29,893 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 40 [2022-11-19 08:00:29,930 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-19 08:00:29,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:00:30,089 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:30,572 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '298#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= |ULTIMATE.start_main_~R~0#1| 2) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2 |ULTIMATE.start_main_~R~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 08:00:30,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:00:30,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:00:30,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-19 08:00:30,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816510916] [2022-11-19 08:00:30,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:30,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:00:30,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:30,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:00:30,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:00:30,574 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:30,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:30,718 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-11-19 08:00:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:00:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:00:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:30,720 INFO L225 Difference]: With dead ends: 21 [2022-11-19 08:00:30,720 INFO L226 Difference]: Without dead ends: 19 [2022-11-19 08:00:30,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:00:30,721 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:30,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 7 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-11-19 08:00:30,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-19 08:00:30,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-19 08:00:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 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) [2022-11-19 08:00:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-19 08:00:30,732 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2022-11-19 08:00:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:30,733 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-19 08:00:30,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:30,733 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-19 08:00:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:00:30,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:30,734 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2022-11-19 08:00:30,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 08:00:30,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-19 08:00:30,940 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:30,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:30,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1828934147, now seen corresponding path program 3 times [2022-11-19 08:00:30,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:30,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931313464] [2022-11-19 08:00:30,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:30,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:30,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:00:30,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583933727] [2022-11-19 08:00:30,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:00:30,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:30,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:30,962 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:30,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:00:31,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:00:31,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:00:31,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:00:31,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:00:31,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:00:31,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:31,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931313464] [2022-11-19 08:00:31,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:00:31,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583933727] [2022-11-19 08:00:31,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583933727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:31,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1920486287] [2022-11-19 08:00:31,178 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:00:31,178 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:31,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:31,179 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:31,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:31,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:31,220 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:00:31,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:00:31,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:31,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:00:31,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:31,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-19 08:00:31,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:31,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:31,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 50 [2022-11-19 08:00:31,310 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 28 [2022-11-19 08:00:31,358 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-19 08:00:31,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:00:31,466 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:31,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '477#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= 2 |ULTIMATE.start_main_~R~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:00:31,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:00:31,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:00:31,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-19 08:00:31,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920301450] [2022-11-19 08:00:31,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:31,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:00:31,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:31,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:00:31,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:00:31,821 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:31,884 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-11-19 08:00:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:00:31,887 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 08:00:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:31,888 INFO L225 Difference]: With dead ends: 38 [2022-11-19 08:00:31,888 INFO L226 Difference]: Without dead ends: 25 [2022-11-19 08:00:31,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:00:31,889 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:31,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:00:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-19 08:00:31,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-19 08:00:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 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) [2022-11-19 08:00:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-19 08:00:31,902 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2022-11-19 08:00:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:31,902 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-19 08:00:31,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-19 08:00:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:00:31,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:31,904 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1] [2022-11-19 08:00:31,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:32,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:32,110 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:32,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1641152605, now seen corresponding path program 4 times [2022-11-19 08:00:32,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:32,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861037222] [2022-11-19 08:00:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:32,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:32,136 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:00:32,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580603483] [2022-11-19 08:00:32,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:00:32,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:32,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:32,146 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:32,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:00:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:32,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:00:32,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:00:32,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:00:32,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:32,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861037222] [2022-11-19 08:00:32,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:00:32,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580603483] [2022-11-19 08:00:32,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580603483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:32,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2009816212] [2022-11-19 08:00:32,690 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:00:32,691 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:32,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:32,691 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:32,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:32,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:32,729 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:00:32,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:00:32,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:32,775 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:00:32,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:00:32,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:32,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:32,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-19 08:00:32,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:32,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:32,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2022-11-19 08:00:32,867 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 28 [2022-11-19 08:00:32,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:00:32,909 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-19 08:00:33,053 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:33,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '741#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= |ULTIMATE.start_main_~R~0#1| 2) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2 |ULTIMATE.start_main_~R~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 08:00:33,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:00:33,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:00:33,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-19 08:00:33,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281306431] [2022-11-19 08:00:33,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:33,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 08:00:33,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 08:00:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2022-11-19 08:00:33,521 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 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) [2022-11-19 08:00:33,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:33,607 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-11-19 08:00:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 08:00:33,610 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 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) Word has length 24 [2022-11-19 08:00:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:33,611 INFO L225 Difference]: With dead ends: 50 [2022-11-19 08:00:33,611 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 08:00:33,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2022-11-19 08:00:33,613 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:33,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:00:33,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 08:00:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-19 08:00:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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) [2022-11-19 08:00:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-19 08:00:33,623 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 24 [2022-11-19 08:00:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:33,623 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-19 08:00:33,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 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) [2022-11-19 08:00:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-19 08:00:33,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:00:33,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:33,624 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 3, 3, 1, 1, 1, 1] [2022-11-19 08:00:33,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 08:00:33,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:33,830 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:33,830 INFO L85 PathProgramCache]: Analyzing trace with hash -851758365, now seen corresponding path program 5 times [2022-11-19 08:00:33,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:33,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623663399] [2022-11-19 08:00:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:33,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:33,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:00:33,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734349669] [2022-11-19 08:00:33,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:00:33,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:33,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:33,857 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:33,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:00:34,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:00:34,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:00:34,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:00:34,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:34,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:00:34,571 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 45 [2022-11-19 08:00:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 08:00:34,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:36,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:00:36,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 179 treesize of output 251 [2022-11-19 08:00:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 08:00:37,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:37,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623663399] [2022-11-19 08:00:37,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:00:37,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734349669] [2022-11-19 08:00:37,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734349669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:37,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1732692955] [2022-11-19 08:00:37,798 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:00:37,798 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:37,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:37,799 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:37,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:37,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:37,834 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:00:37,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:00:37,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:37,890 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:00:37,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:00:37,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:37,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:37,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-19 08:00:37,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:37,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2022-11-19 08:00:37,955 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 28 [2022-11-19 08:00:38,005 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-19 08:00:38,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:00:38,116 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:38,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1115#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= 2 |ULTIMATE.start_main_~R~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:00:38,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:00:38,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:00:38,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-19 08:00:38,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627244687] [2022-11-19 08:00:38,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:38,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:00:38,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:00:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:00:38,469 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-11-19 08:00:39,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:39,194 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-11-19 08:00:39,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 08:00:39,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) Word has length 36 [2022-11-19 08:00:39,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:39,196 INFO L225 Difference]: With dead ends: 51 [2022-11-19 08:00:39,196 INFO L226 Difference]: Without dead ends: 49 [2022-11-19 08:00:39,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:00:39,197 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:39,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-11-19 08:00:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-19 08:00:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-19 08:00:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 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) [2022-11-19 08:00:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-19 08:00:39,217 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 36 [2022-11-19 08:00:39,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:39,218 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-19 08:00:39,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 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) [2022-11-19 08:00:39,220 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-19 08:00:39,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 08:00:39,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:39,221 INFO L195 NwaCegarLoop]: trace histogram [22, 8, 7, 7, 1, 1, 1, 1] [2022-11-19 08:00:39,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:39,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:39,422 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:39,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:39,423 INFO L85 PathProgramCache]: Analyzing trace with hash -343064861, now seen corresponding path program 6 times [2022-11-19 08:00:39,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:39,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529372043] [2022-11-19 08:00:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:39,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:39,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:00:39,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265194346] [2022-11-19 08:00:39,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:00:39,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:39,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:39,452 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:39,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:00:39,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:00:39,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:00:39,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:00:39,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-19 08:00:40,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-19 08:00:41,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:41,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529372043] [2022-11-19 08:00:41,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:00:41,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265194346] [2022-11-19 08:00:41,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265194346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:41,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1828276770] [2022-11-19 08:00:41,032 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:00:41,033 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:41,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:41,033 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:41,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:41,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:41,081 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:00:41,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:00:41,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:41,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:00:41,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:41,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:41,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-19 08:00:41,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:41,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2022-11-19 08:00:41,177 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 40 [2022-11-19 08:00:41,211 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-19 08:00:41,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:00:41,343 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:41,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1626#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000000 ~N~0) (<= |ULTIMATE.start_main_~R~0#1| 2) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= ~N~0 1000000) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 2 |ULTIMATE.start_main_~R~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 08:00:41,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:00:41,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:00:41,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2022-11-19 08:00:41,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768702757] [2022-11-19 08:00:41,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:41,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-19 08:00:41,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-19 08:00:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1144, Invalid=1612, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 08:00:41,844 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:42,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:42,025 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2022-11-19 08:00:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-19 08:00:42,028 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-19 08:00:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:42,029 INFO L225 Difference]: With dead ends: 98 [2022-11-19 08:00:42,029 INFO L226 Difference]: Without dead ends: 73 [2022-11-19 08:00:42,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1144, Invalid=1612, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 08:00:42,030 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:42,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:00:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-19 08:00:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-11-19 08:00:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 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) [2022-11-19 08:00:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-11-19 08:00:42,054 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 48 [2022-11-19 08:00:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:42,056 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-11-19 08:00:42,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:42,056 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-11-19 08:00:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 08:00:42,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:42,059 INFO L195 NwaCegarLoop]: trace histogram [46, 8, 7, 7, 1, 1, 1, 1] [2022-11-19 08:00:42,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:42,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 08:00:42,265 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:42,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:42,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1957250403, now seen corresponding path program 7 times [2022-11-19 08:00:42,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:42,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140233960] [2022-11-19 08:00:42,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:42,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:42,319 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:00:42,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887192874] [2022-11-19 08:00:42,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:00:42,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:42,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:42,321 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:42,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:00:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:42,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-19 08:00:42,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-19 08:00:44,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-19 08:00:47,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:47,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140233960] [2022-11-19 08:00:47,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:00:47,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887192874] [2022-11-19 08:00:47,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887192874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:47,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1968029863] [2022-11-19 08:00:47,340 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:00:47,341 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:47,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:47,341 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:47,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:47,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:47,378 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:00:47,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:00:47,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:47,424 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:00:47,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:00:47,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:47,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:47,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-19 08:00:47,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:47,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:47,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 54 [2022-11-19 08:00:47,483 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 28 [2022-11-19 08:00:47,507 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-19 08:00:47,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:00:47,621 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:48,129 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2442#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= 2 |ULTIMATE.start_main_~R~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:00:48,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:00:48,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:00:48,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2022-11-19 08:00:48,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230814230] [2022-11-19 08:00:48,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:48,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-19 08:00:48,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:48,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-19 08:00:48,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4572, Invalid=5528, Unknown=0, NotChecked=0, Total=10100 [2022-11-19 08:00:48,137 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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) [2022-11-19 08:00:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:48,490 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2022-11-19 08:00:48,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-19 08:00:48,491 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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 72 [2022-11-19 08:00:48,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:48,492 INFO L225 Difference]: With dead ends: 146 [2022-11-19 08:00:48,492 INFO L226 Difference]: Without dead ends: 121 [2022-11-19 08:00:48,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4572, Invalid=5528, Unknown=0, NotChecked=0, Total=10100 [2022-11-19 08:00:48,496 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:48,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:00:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-19 08:00:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-19 08:00:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 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) [2022-11-19 08:00:48,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-11-19 08:00:48,519 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 72 [2022-11-19 08:00:48,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:48,520 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-11-19 08:00:48,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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) [2022-11-19 08:00:48,520 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-11-19 08:00:48,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-19 08:00:48,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:48,522 INFO L195 NwaCegarLoop]: trace histogram [94, 8, 7, 7, 1, 1, 1, 1] [2022-11-19 08:00:48,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:48,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:48,727 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:48,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:48,728 INFO L85 PathProgramCache]: Analyzing trace with hash 54448739, now seen corresponding path program 8 times [2022-11-19 08:00:48,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:48,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201532007] [2022-11-19 08:00:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:48,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:48,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:00:48,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030606085] [2022-11-19 08:00:48,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:00:48,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:48,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:48,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:48,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:00:50,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-19 08:00:50,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:00:50,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:00:50,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:51,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:00:51,862 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 45 [2022-11-19 08:00:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4542 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-19 08:00:51,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:56,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:00:56,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 256 treesize of output 328 [2022-11-19 08:01:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4542 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-11-19 08:01:04,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:04,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201532007] [2022-11-19 08:01:04,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:01:04,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030606085] [2022-11-19 08:01:04,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030606085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:04,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1688460050] [2022-11-19 08:01:04,617 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:01:04,618 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:01:04,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:01:04,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:01:04,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:01:04,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:04,655 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:01:04,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:01:04,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:04,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:01:04,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:04,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:04,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-19 08:01:04,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:04,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:04,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 50 [2022-11-19 08:01:04,720 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 28 [2022-11-19 08:01:04,760 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-19 08:01:04,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:01:04,846 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:01:05,267 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3664#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= 2 |ULTIMATE.start_main_~R~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:01:05,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:01:05,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:01:05,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-19 08:01:05,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098116434] [2022-11-19 08:01:05,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:01:05,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 08:01:05,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:05,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 08:01:05,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-11-19 08:01:05,269 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:07,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:07,906 INFO L93 Difference]: Finished difference Result 147 states and 155 transitions. [2022-11-19 08:01:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-19 08:01:07,906 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-19 08:01:07,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:07,908 INFO L225 Difference]: With dead ends: 147 [2022-11-19 08:01:07,908 INFO L226 Difference]: Without dead ends: 145 [2022-11-19 08:01:07,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=623, Invalid=1447, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 08:01:07,909 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:07,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2022-11-19 08:01:07,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-19 08:01:07,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-11-19 08:01:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 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) [2022-11-19 08:01:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-11-19 08:01:07,935 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 120 [2022-11-19 08:01:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:07,936 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-11-19 08:01:07,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-11-19 08:01:07,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-19 08:01:07,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:07,940 INFO L195 NwaCegarLoop]: trace histogram [94, 16, 15, 15, 1, 1, 1, 1] [2022-11-19 08:01:07,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:08,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:01:08,141 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:08,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:08,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2016045667, now seen corresponding path program 9 times [2022-11-19 08:01:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:08,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890187872] [2022-11-19 08:01:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:08,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:08,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:01:08,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217942656] [2022-11-19 08:01:08,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:01:08,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:08,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:08,227 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:08,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:01:08,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:01:08,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:01:08,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-19 08:01:08,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-11-19 08:01:13,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-11-19 08:01:25,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:25,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890187872] [2022-11-19 08:01:25,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:01:25,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217942656] [2022-11-19 08:01:25,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217942656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:25,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460459474] [2022-11-19 08:01:25,990 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:01:25,990 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:01:25,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:01:25,990 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:01:25,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:01:26,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:26,025 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:01:26,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:01:26,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:26,065 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:01:26,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:01:26,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:26,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:26,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-19 08:01:26,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:26,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 64 [2022-11-19 08:01:26,122 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 28 [2022-11-19 08:01:26,167 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-19 08:01:26,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:01:26,263 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:01:27,003 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5271#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= 2 |ULTIMATE.start_main_~R~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:01:27,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:01:27,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:01:27,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 191 [2022-11-19 08:01:27,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452406808] [2022-11-19 08:01:27,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:01:27,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-11-19 08:01:27,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:27,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-11-19 08:01:27,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18348, Invalid=20264, Unknown=0, NotChecked=0, Total=38612 [2022-11-19 08:01:27,017 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 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) [2022-11-19 08:01:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:27,752 INFO L93 Difference]: Finished difference Result 290 states and 387 transitions. [2022-11-19 08:01:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-19 08:01:27,753 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 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 144 [2022-11-19 08:01:27,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:27,755 INFO L225 Difference]: With dead ends: 290 [2022-11-19 08:01:27,755 INFO L226 Difference]: Without dead ends: 241 [2022-11-19 08:01:27,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=18348, Invalid=20264, Unknown=0, NotChecked=0, Total=38612 [2022-11-19 08:01:27,759 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:27,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:01:27,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-19 08:01:27,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-11-19 08:01:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0083333333333333) internal successors, (242), 240 states have internal predecessors, (242), 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) [2022-11-19 08:01:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2022-11-19 08:01:27,812 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 144 [2022-11-19 08:01:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:27,812 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2022-11-19 08:01:27,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 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) [2022-11-19 08:01:27,813 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2022-11-19 08:01:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-19 08:01:27,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:27,816 INFO L195 NwaCegarLoop]: trace histogram [190, 16, 15, 15, 1, 1, 1, 1] [2022-11-19 08:01:27,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:28,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 08:01:28,032 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:28,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:28,033 INFO L85 PathProgramCache]: Analyzing trace with hash -2120383389, now seen corresponding path program 10 times [2022-11-19 08:01:28,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:28,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622367147] [2022-11-19 08:01:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:28,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:28,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:01:28,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797947475] [2022-11-19 08:01:28,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:01:28,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:28,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:28,168 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:28,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:01:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:29,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 2092 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-19 08:01:29,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18490 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-11-19 08:01:46,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18490 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-11-19 08:02:37,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:37,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622367147] [2022-11-19 08:02:37,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:02:37,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797947475] [2022-11-19 08:02:37,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797947475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:37,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1132245332] [2022-11-19 08:02:37,016 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:02:37,017 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:02:37,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:02:37,017 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:02:37,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:02:37,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:37,052 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:02:37,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:02:37,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:37,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:02:37,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:37,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:37,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-19 08:02:37,096 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:02:37,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:37,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:37,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:37,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:37,216 INFO L321 Elim1Store]: treesize reduction 149, result has 4.5 percent of original size [2022-11-19 08:02:37,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 572 treesize of output 624 [2022-11-19 08:02:37,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:37,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:02:37,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 387 treesize of output 378 [2022-11-19 08:02:37,913 INFO L321 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2022-11-19 08:02:37,914 INFO L350 Elim1Store]: Elim1 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 722 treesize of output 678 [2022-11-19 08:02:37,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:37,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:37,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 626 treesize of output 594 [2022-11-19 08:02:38,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 594 treesize of output 568 [2022-11-19 08:02:38,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 591 treesize of output 563 [2022-11-19 08:02:38,057 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:02:38,074 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:02:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:38,138 INFO L321 Elim1Store]: treesize reduction 50, result has 9.1 percent of original size [2022-11-19 08:02:38,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 413 treesize of output 385 [2022-11-19 08:02:38,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 28 [2022-11-19 08:02:38,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:02:38,276 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-19 08:02:38,339 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:02:39,392 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8055#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= 2 |ULTIMATE.start_main_~R~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:02:39,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:02:39,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:02:39,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192] total 383 [2022-11-19 08:02:39,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593360099] [2022-11-19 08:02:39,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:02:39,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2022-11-19 08:02:39,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:39,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2022-11-19 08:02:39,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73548, Invalid=77384, Unknown=0, NotChecked=0, Total=150932 [2022-11-19 08:02:39,422 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 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) [2022-11-19 08:02:41,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:41,627 INFO L93 Difference]: Finished difference Result 482 states and 675 transitions. [2022-11-19 08:02:41,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-19 08:02:41,629 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 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 240 [2022-11-19 08:02:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:41,631 INFO L225 Difference]: With dead ends: 482 [2022-11-19 08:02:41,631 INFO L226 Difference]: Without dead ends: 433 [2022-11-19 08:02:41,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2856 ImplicationChecksByTransitivity, 67.9s TimeCoverageRelationStatistics Valid=73548, Invalid=77384, Unknown=0, NotChecked=0, Total=150932 [2022-11-19 08:02:41,639 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:41,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 42 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:02:41,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-19 08:02:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2022-11-19 08:02:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.0046296296296295) internal successors, (434), 432 states have internal predecessors, (434), 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) [2022-11-19 08:02:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 434 transitions. [2022-11-19 08:02:41,726 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 434 transitions. Word has length 240 [2022-11-19 08:02:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:41,726 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 434 transitions. [2022-11-19 08:02:41,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 384 states have (on average 1.0130208333333333) internal successors, (389), 383 states have internal predecessors, (389), 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) [2022-11-19 08:02:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 434 transitions. [2022-11-19 08:02:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-11-19 08:02:41,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:41,734 INFO L195 NwaCegarLoop]: trace histogram [382, 16, 15, 15, 1, 1, 1, 1] [2022-11-19 08:02:41,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:41,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:41,949 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:41,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:41,949 INFO L85 PathProgramCache]: Analyzing trace with hash 442218595, now seen corresponding path program 11 times [2022-11-19 08:02:41,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:41,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931202466] [2022-11-19 08:02:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:41,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:42,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:02:42,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890777910] [2022-11-19 08:02:42,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:02:42,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:42,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:42,219 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:42,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:05:46,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-19 08:05:46,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:05:46,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-19 08:05:46,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:50,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:05:50,014 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 45 [2022-11-19 08:05:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 73498 backedges. 1 proven. 1866 refuted. 0 times theorem prover too weak. 71631 trivial. 0 not checked. [2022-11-19 08:05:50,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:02,901 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:06:02,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 381 treesize of output 453 [2022-11-19 08:07:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 73498 backedges. 0 proven. 1108 refuted. 0 times theorem prover too weak. 72390 trivial. 0 not checked. [2022-11-19 08:07:17,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:17,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931202466] [2022-11-19 08:07:17,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:07:17,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890777910] [2022-11-19 08:07:17,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890777910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:17,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2134016610] [2022-11-19 08:07:17,553 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:07:17,554 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:07:17,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:07:17,554 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:07:17,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:07:17,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:17,595 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:07:17,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:07:17,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:17,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:07:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:17,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:17,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 134 [2022-11-19 08:07:17,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:17,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 64 [2022-11-19 08:07:17,661 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 28 [2022-11-19 08:07:17,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:07:17,698 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-19 08:07:17,778 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:07:18,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12419#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= 2 |ULTIMATE.start_main_~R~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:07:18,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:07:18,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:07:18,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 43 [2022-11-19 08:07:18,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078734958] [2022-11-19 08:07:18,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:07:18,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-19 08:07:18,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:07:18,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-19 08:07:18,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=1608, Unknown=0, NotChecked=0, Total=2352 [2022-11-19 08:07:18,328 INFO L87 Difference]: Start difference. First operand 433 states and 434 transitions. Second operand has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 43 states have internal predecessors, (107), 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) [2022-11-19 08:07:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:30,857 INFO L93 Difference]: Finished difference Result 483 states and 499 transitions. [2022-11-19 08:07:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-19 08:07:30,858 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 43 states have internal predecessors, (107), 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 432 [2022-11-19 08:07:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:30,860 INFO L225 Difference]: With dead ends: 483 [2022-11-19 08:07:30,860 INFO L226 Difference]: Without dead ends: 481 [2022-11-19 08:07:30,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1338 GetRequests, 1247 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=2717, Invalid=5839, Unknown=0, NotChecked=0, Total=8556 [2022-11-19 08:07:30,862 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:30,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 58 Unchecked, 0.0s Time] [2022-11-19 08:07:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-11-19 08:07:30,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 481. [2022-11-19 08:07:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.0041666666666667) internal successors, (482), 480 states have internal predecessors, (482), 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) [2022-11-19 08:07:30,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 482 transitions. [2022-11-19 08:07:30,942 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 482 transitions. Word has length 432 [2022-11-19 08:07:30,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:30,943 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 482 transitions. [2022-11-19 08:07:30,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 43 states have internal predecessors, (107), 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) [2022-11-19 08:07:30,944 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 482 transitions. [2022-11-19 08:07:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2022-11-19 08:07:30,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:30,952 INFO L195 NwaCegarLoop]: trace histogram [382, 32, 31, 31, 1, 1, 1, 1] [2022-11-19 08:07:31,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:07:31,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:07:31,167 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:07:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash -649664413, now seen corresponding path program 12 times [2022-11-19 08:07:31,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:31,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143430427] [2022-11-19 08:07:31,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:31,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:31,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:07:31,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655378410] [2022-11-19 08:07:31,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:07:31,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:31,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:31,390 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:31,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:07:33,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:07:33,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:07:33,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 4156 conjuncts, 385 conjunts are in the unsatisfiable core [2022-11-19 08:07:33,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 74610 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2022-11-19 08:08:41,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 74610 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2022-11-19 08:12:06,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:06,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143430427] [2022-11-19 08:12:06,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:12:06,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655378410] [2022-11-19 08:12:06,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655378410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:06,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370808011] [2022-11-19 08:12:06,384 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:12:06,385 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:06,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:06,385 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:06,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:06,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:06,441 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:12:06,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:12:06,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:06,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:12:06,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:06,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:06,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 160 [2022-11-19 08:12:06,499 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:06,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:06,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:06,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:06,591 INFO L321 Elim1Store]: treesize reduction 149, result has 4.5 percent of original size [2022-11-19 08:12:06,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 572 treesize of output 624 [2022-11-19 08:12:06,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:06,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:12:06,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 387 treesize of output 378 [2022-11-19 08:12:07,484 INFO L321 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-11-19 08:12:07,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 2058 treesize of output 1965 [2022-11-19 08:12:07,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1895 treesize of output 1797 [2022-11-19 08:12:07,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:07,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:07,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1793 treesize of output 1773 [2022-11-19 08:12:07,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1773 treesize of output 1705 [2022-11-19 08:12:07,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:07,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:07,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1705 treesize of output 1687 [2022-11-19 08:12:07,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:07,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:07,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1687 treesize of output 1667 [2022-11-19 08:12:07,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:07,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:07,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1667 treesize of output 1647 [2022-11-19 08:12:07,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:07,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:07,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1647 treesize of output 1629 [2022-11-19 08:12:07,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:07,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:07,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 1629 treesize of output 1609 [2022-11-19 08:12:08,104 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:08,146 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:12:08,297 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 49 [2022-11-19 08:12:08,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:12:08,370 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:10,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17948#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= 2 |ULTIMATE.start_main_~R~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:10,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:10,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:12:10,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384] total 767 [2022-11-19 08:12:10,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387467856] [2022-11-19 08:12:10,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:10,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2022-11-19 08:12:10,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2022-11-19 08:12:10,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294540, Invalid=302216, Unknown=0, NotChecked=0, Total=596756 [2022-11-19 08:12:10,304 INFO L87 Difference]: Start difference. First operand 481 states and 482 transitions. Second operand has 768 states, 768 states have (on average 1.0065104166666667) internal successors, (773), 767 states have internal predecessors, (773), 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) [2022-11-19 08:12:21,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:21,921 INFO L93 Difference]: Finished difference Result 962 states and 1347 transitions. [2022-11-19 08:12:21,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-11-19 08:12:21,923 INFO L78 Accepts]: Start accepts. Automaton has has 768 states, 768 states have (on average 1.0065104166666667) internal successors, (773), 767 states have internal predecessors, (773), 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 480 [2022-11-19 08:12:21,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:21,926 INFO L225 Difference]: With dead ends: 962 [2022-11-19 08:12:21,927 INFO L226 Difference]: Without dead ends: 865 [2022-11-19 08:12:21,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1438 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 771 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5736 ImplicationChecksByTransitivity, 272.9s TimeCoverageRelationStatistics Valid=294540, Invalid=302216, Unknown=0, NotChecked=0, Total=596756 [2022-11-19 08:12:21,971 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:21,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 08:12:21,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-11-19 08:12:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 865. [2022-11-19 08:12:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 1.0023148148148149) internal successors, (866), 864 states have internal predecessors, (866), 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) [2022-11-19 08:12:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 866 transitions. [2022-11-19 08:12:22,098 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 866 transitions. Word has length 480 [2022-11-19 08:12:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:22,099 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 866 transitions. [2022-11-19 08:12:22,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 768 states, 768 states have (on average 1.0065104166666667) internal successors, (773), 767 states have internal predecessors, (773), 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) [2022-11-19 08:12:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 866 transitions. [2022-11-19 08:12:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 865 [2022-11-19 08:12:22,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:22,108 INFO L195 NwaCegarLoop]: trace histogram [766, 32, 31, 31, 1, 1, 1, 1] [2022-11-19 08:12:22,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:22,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:12:22,316 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:22,317 INFO L85 PathProgramCache]: Analyzing trace with hash -525119389, now seen corresponding path program 13 times [2022-11-19 08:12:22,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:22,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276806973] [2022-11-19 08:12:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:22,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:22,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:12:22,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392823979] [2022-11-19 08:12:22,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:12:22,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:22,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:22,773 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:22,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cbb8ed7-a603-4277-a091-cee4e79f27f8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:12:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:26,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 7996 conjuncts, 769 conjunts are in the unsatisfiable core [2022-11-19 08:12:26,977 INFO L286 TraceCheckSpWp]: Computing forward predicates...