./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur --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 675f35e66fa59545cd4a52408711c9386973ccbbb0528c29e7af26cf7aa65f50 --- 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-38b53e6 [2022-11-25 23:18:54,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:18:54,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:18:54,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:18:54,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:18:54,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:18:54,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:18:54,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:18:54,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:18:54,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:18:54,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:18:54,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:18:54,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:18:54,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:18:54,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:18:54,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:18:54,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:18:54,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:18:54,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:18:54,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:18:54,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:18:54,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:18:54,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:18:54,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:18:54,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:18:54,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:18:54,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:18:54,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:18:54,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:18:54,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:18:54,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:18:54,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:18:54,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:18:54,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:18:54,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:18:54,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:18:54,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:18:54,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:18:54,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:18:54,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:18:54,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:18:54,830 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:18:54,868 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:18:54,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:18:54,869 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:18:54,869 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:18:54,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:18:54,870 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:18:54,870 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:18:54,870 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:18:54,871 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:18:54,871 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:18:54,872 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:18:54,872 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:18:54,872 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:18:54,873 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:18:54,873 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:18:54,873 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:18:54,873 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:18:54,873 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:18:54,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:18:54,874 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:18:54,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:18:54,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:18:54,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:18:54,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:18:54,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:18:54,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:18:54,876 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:18:54,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:18:54,877 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:18:54,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:18:54,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:18:54,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:18:54,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:18:54,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:18:54,878 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:18:54,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:18:54,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:18:54,879 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:18:54,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:18:54,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:18:54,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:18:54,880 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_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675f35e66fa59545cd4a52408711c9386973ccbbb0528c29e7af26cf7aa65f50 [2022-11-25 23:18:55,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:18:55,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:18:55,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:18:55,228 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:18:55,230 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:18:55,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i [2022-11-25 23:18:58,815 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:18:59,069 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:18:59,070 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i [2022-11-25 23:18:59,078 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/data/fcfe21276/d53d2bb182c042f9a5ca237e57c287ff/FLAG056802902 [2022-11-25 23:18:59,095 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/data/fcfe21276/d53d2bb182c042f9a5ca237e57c287ff [2022-11-25 23:18:59,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:18:59,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:18:59,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:18:59,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:18:59,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:18:59,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:18:59" (1/1) ... [2022-11-25 23:18:59,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f7a5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59, skipping insertion in model container [2022-11-25 23:18:59,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:18:59" (1/1) ... [2022-11-25 23:18:59,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:18:59,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:18:59,320 WARN L237 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_b65d2440-f694-4f76-8c20-8bc3ca10d929/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i[816,829] [2022-11-25 23:18:59,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:18:59,363 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:18:59,375 WARN L237 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_b65d2440-f694-4f76-8c20-8bc3ca10d929/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i[816,829] [2022-11-25 23:18:59,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:18:59,409 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:18:59,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59 WrapperNode [2022-11-25 23:18:59,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:18:59,411 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:18:59,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:18:59,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:18:59,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59" (1/1) ... [2022-11-25 23:18:59,430 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59" (1/1) ... [2022-11-25 23:18:59,470 INFO L138 Inliner]: procedures = 16, calls = 54, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 179 [2022-11-25 23:18:59,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:18:59,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:18:59,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:18:59,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:18:59,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59" (1/1) ... [2022-11-25 23:18:59,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59" (1/1) ... [2022-11-25 23:18:59,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59" (1/1) ... [2022-11-25 23:18:59,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59" (1/1) ... [2022-11-25 23:18:59,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59" (1/1) ... [2022-11-25 23:18:59,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59" (1/1) ... [2022-11-25 23:18:59,503 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59" (1/1) ... [2022-11-25 23:18:59,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59" (1/1) ... [2022-11-25 23:18:59,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:18:59,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:18:59,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:18:59,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:18:59,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59" (1/1) ... [2022-11-25 23:18:59,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:18:59,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:18:59,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:18:59,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:18:59,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:18:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:18:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:18:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:18:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:18:59,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:18:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:18:59,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:18:59,776 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:18:59,786 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:19:00,215 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:19:00,292 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:19:00,293 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-25 23:19:00,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:19:00 BoogieIcfgContainer [2022-11-25 23:19:00,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:19:00,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:19:00,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:19:00,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:19:00,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:18:59" (1/3) ... [2022-11-25 23:19:00,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecbe667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:19:00, skipping insertion in model container [2022-11-25 23:19:00,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:18:59" (2/3) ... [2022-11-25 23:19:00,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecbe667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:19:00, skipping insertion in model container [2022-11-25 23:19:00,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:19:00" (3/3) ... [2022-11-25 23:19:00,323 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2022-11-25 23:19:00,369 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:19:00,369 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:19:00,454 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:19:00,464 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;@6ede7032, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:19:00,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:19:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 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) [2022-11-25 23:19:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:19:00,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:00,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:00,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1416400191, now seen corresponding path program 1 times [2022-11-25 23:19:00,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:00,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379831466] [2022-11-25 23:19:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:00,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:19:00,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:00,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379831466] [2022-11-25 23:19:00,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379831466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:19:00,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:19:00,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:19:00,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864594068] [2022-11-25 23:19:00,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:19:00,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:19:00,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:00,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:19:00,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:19:00,967 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 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) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:19:01,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:01,077 INFO L93 Difference]: Finished difference Result 31 states and 51 transitions. [2022-11-25 23:19:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:19:01,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:19:01,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:01,090 INFO L225 Difference]: With dead ends: 31 [2022-11-25 23:19:01,090 INFO L226 Difference]: Without dead ends: 16 [2022-11-25 23:19:01,093 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 [2022-11-25 23:19:01,097 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:01,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:19:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-25 23:19:01,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-25 23:19:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:19:01,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 25 transitions. [2022-11-25 23:19:01,137 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 25 transitions. Word has length 13 [2022-11-25 23:19:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:01,138 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 25 transitions. [2022-11-25 23:19:01,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:19:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 25 transitions. [2022-11-25 23:19:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:19:01,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:01,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:01,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:19:01,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1959779971, now seen corresponding path program 1 times [2022-11-25 23:19:01,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:01,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6633205] [2022-11-25 23:19:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:01,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:19:01,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:01,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6633205] [2022-11-25 23:19:01,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6633205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:19:01,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313120811] [2022-11-25 23:19:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:01,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:19:01,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:19:01,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:19:01,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:19:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 23:19:01,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:19:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:19:01,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:19:01,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313120811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:19:01,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:19:01,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 23:19:01,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857617897] [2022-11-25 23:19:01,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:19:01,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:19:01,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:01,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:19:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:19:01,672 INFO L87 Difference]: Start difference. First operand 16 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-11-25 23:19:01,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:01,765 INFO L93 Difference]: Finished difference Result 36 states and 60 transitions. [2022-11-25 23:19:01,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:19:01,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) Word has length 14 [2022-11-25 23:19:01,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:01,767 INFO L225 Difference]: With dead ends: 36 [2022-11-25 23:19:01,767 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 23:19:01,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:19:01,769 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:01,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:19:01,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 23:19:01,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-25 23:19:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 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) [2022-11-25 23:19:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2022-11-25 23:19:01,777 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 14 [2022-11-25 23:19:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:01,777 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2022-11-25 23:19:01,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-11-25 23:19:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2022-11-25 23:19:01,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 23:19:01,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:01,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:01,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:19:01,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-25 23:19:01,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:01,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:01,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1111026535, now seen corresponding path program 1 times [2022-11-25 23:19:01,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:01,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080155965] [2022-11-25 23:19:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:01,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:19:02,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:02,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080155965] [2022-11-25 23:19:02,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080155965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:19:02,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303269349] [2022-11-25 23:19:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:02,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:19:02,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:19:02,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:19:02,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:19:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:02,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:19:02,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:19:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:19:02,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:19:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:19:02,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303269349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:19:02,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2131755733] [2022-11-25 23:19:02,597 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:19:02,598 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:19:02,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:19:02,609 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:19:02,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:19:02,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:02,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:02,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:02,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:02,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:02,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:02,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:02,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:03,564 INFO L321 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-25 23:19:03,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-25 23:19:03,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:03,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:03,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:03,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:03,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:03,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:04,807 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-25 23:19:04,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-25 23:19:05,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:05,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:05,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:19:06,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:06,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:06,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:06,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:06,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:06,359 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:19:06,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-25 23:19:08,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:09,005 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:19:09,006 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:19:09,060 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:09,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:09,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:09,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:09,223 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:09,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:09,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:09,396 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:09,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:09,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:09,441 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:09,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:09,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:09,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:09,536 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:09,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:09,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:09,652 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:09,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:09,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:09,731 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:09,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:09,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:09,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:09,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:09,832 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:09,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:09,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:09,906 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:09,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:09,958 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:09,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:10,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:10,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:10,110 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:10,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:10,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:10,247 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:10,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:10,291 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:10,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:10,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:10,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:10,420 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:19:10,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:19:10,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:10,568 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:10,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:10,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:10,609 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:10,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:10,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:10,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:10,698 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:10,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:10,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:10,776 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:10,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:10,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:10,817 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:10,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:10,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:10,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:10,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:10,904 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:10,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:11,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:11,038 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:11,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:11,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:11,112 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:11,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:11,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:11,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:11,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:11,189 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:11,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:11,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:11,268 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:11,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:11,298 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:19:11,830 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '383#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:19:11,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:19:11,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:19:11,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 23:19:11,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722938736] [2022-11-25 23:19:11,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:19:11,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:19:11,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:11,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:19:11,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:19:11,834 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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) [2022-11-25 23:19:11,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:11,924 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-11-25 23:19:11,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:19:11,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 22 [2022-11-25 23:19:11,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:11,925 INFO L225 Difference]: With dead ends: 48 [2022-11-25 23:19:11,925 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 23:19:11,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:19:11,927 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:11,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:19:11,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 23:19:11,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-25 23:19:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:19:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2022-11-25 23:19:11,932 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 22 [2022-11-25 23:19:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:11,933 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2022-11-25 23:19:11,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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) [2022-11-25 23:19:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-11-25 23:19:11,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 23:19:11,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:11,934 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:11,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:19:12,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:19:12,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:12,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:12,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1068781347, now seen corresponding path program 2 times [2022-11-25 23:19:12,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:12,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758293155] [2022-11-25 23:19:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:12,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 23:19:12,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:12,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758293155] [2022-11-25 23:19:12,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758293155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:19:12,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114741078] [2022-11-25 23:19:12,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:19:12,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:19:12,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:19:12,293 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:19:12,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:19:12,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:19:12,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:19:12,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:19:12,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:19:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 23:19:12,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:19:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 23:19:12,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114741078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:19:12,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717686476] [2022-11-25 23:19:12,539 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:19:12,539 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:19:12,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:19:12,540 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:19:12,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:19:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:12,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:12,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:12,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:12,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:12,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:12,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:13,701 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-25 23:19:13,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-25 23:19:13,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:13,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:13,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:13,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:13,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:13,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:13,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:13,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:13,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:13,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-25 23:19:13,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:13,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:13,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 23:19:14,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:14,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:14,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:14,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:14,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:14,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:14,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:14,603 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 23:19:14,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 920 treesize of output 888 [2022-11-25 23:19:14,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:14,961 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:19:14,961 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:19:15,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,021 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:15,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:15,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:15,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,097 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:15,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:15,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,169 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:15,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:15,208 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:15,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:15,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,322 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:15,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:15,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,435 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:15,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:15,478 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:15,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:15,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,595 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:15,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:15,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,710 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:15,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:15,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,758 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:15,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:15,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:15,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,833 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:15,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:15,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,914 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:15,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:15,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:15,952 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:15,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:16,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,044 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:16,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:16,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,142 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:16,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:16,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,210 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:16,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:16,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:16,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,286 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:16,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:16,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,351 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:16,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:16,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,386 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:16,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:16,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,460 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:16,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:16,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,549 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:16,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:16,648 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:16,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:16,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,765 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:16,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:16,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:16,892 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:16,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:16,915 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:19:17,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '675#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:19:17,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:19:17,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:19:17,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 23:19:17,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601702477] [2022-11-25 23:19:17,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:19:17,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:19:17,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:17,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:19:17,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:19:17,408 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 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) [2022-11-25 23:19:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:17,589 INFO L93 Difference]: Finished difference Result 70 states and 110 transitions. [2022-11-25 23:19:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:19:17,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 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) Word has length 25 [2022-11-25 23:19:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:17,591 INFO L225 Difference]: With dead ends: 70 [2022-11-25 23:19:17,591 INFO L226 Difference]: Without dead ends: 51 [2022-11-25 23:19:17,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:19:17,593 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:17,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:19:17,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-25 23:19:17,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-25 23:19:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 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) [2022-11-25 23:19:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-11-25 23:19:17,601 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 25 [2022-11-25 23:19:17,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:17,601 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-11-25 23:19:17,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 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) [2022-11-25 23:19:17,602 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-11-25 23:19:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 23:19:17,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:17,603 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:17,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 23:19:17,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:19:17,810 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:17,810 INFO L85 PathProgramCache]: Analyzing trace with hash -683910209, now seen corresponding path program 3 times [2022-11-25 23:19:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:17,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975442819] [2022-11-25 23:19:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-25 23:19:18,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:18,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975442819] [2022-11-25 23:19:18,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975442819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:19:18,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790146688] [2022-11-25 23:19:18,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:19:18,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:19:18,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:19:18,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:19:18,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:19:18,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:19:18,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:19:18,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:19:18,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:19:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-25 23:19:18,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:19:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-25 23:19:18,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790146688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:19:18,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1129725304] [2022-11-25 23:19:18,528 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:19:18,528 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:19:18,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:19:18,529 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:19:18,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:19:18,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:18,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:18,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:18,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:18,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:18,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:18,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:18,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:18,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:19,137 INFO L321 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-25 23:19:19,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-25 23:19:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:19,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:19,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:19,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:19,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:19,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:19,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:19,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:19,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:20,093 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-25 23:19:20,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-25 23:19:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:20,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:20,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:19:20,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:20,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:20,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:20,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:20,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:20,821 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:19:20,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-25 23:19:22,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:22,737 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:19:22,737 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:19:22,781 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:22,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:22,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:22,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:22,886 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:22,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:22,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:22,999 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:23,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:23,035 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:23,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:23,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,132 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:23,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:23,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,233 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:23,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:23,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,272 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:23,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:23,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,338 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:23,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:23,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,413 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:23,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:23,462 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:23,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:23,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,579 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:23,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:23,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,669 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:23,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:23,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,707 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:23,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:23,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,775 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:23,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:23,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:23,894 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:23,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:23,971 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:23,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:24,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:24,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:24,077 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:24,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:24,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:24,158 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:24,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:24,199 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:24,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:24,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:24,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:24,322 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:24,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:24,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:24,430 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:24,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:24,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:24,468 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:24,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:24,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:24,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:24,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:24,537 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:24,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:24,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:24,615 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:24,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:24,642 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:19:25,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1209#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:19:25,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:19:25,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:19:25,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 23:19:25,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207591878] [2022-11-25 23:19:25,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:19:25,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:19:25,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:25,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:19:25,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:19:25,181 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 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) [2022-11-25 23:19:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:25,281 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2022-11-25 23:19:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:19:25,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 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 49 [2022-11-25 23:19:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:25,283 INFO L225 Difference]: With dead ends: 102 [2022-11-25 23:19:25,283 INFO L226 Difference]: Without dead ends: 57 [2022-11-25 23:19:25,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-25 23:19:25,285 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:25,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:19:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-25 23:19:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-25 23:19:25,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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) [2022-11-25 23:19:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-11-25 23:19:25,294 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 49 [2022-11-25 23:19:25,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:25,294 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-11-25 23:19:25,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 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) [2022-11-25 23:19:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-11-25 23:19:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 23:19:25,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:25,296 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:25,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 23:19:25,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:19:25,502 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:25,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:25,503 INFO L85 PathProgramCache]: Analyzing trace with hash -925125313, now seen corresponding path program 4 times [2022-11-25 23:19:25,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:25,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325812195] [2022-11-25 23:19:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:25,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-25 23:19:26,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:26,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325812195] [2022-11-25 23:19:26,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325812195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:19:26,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383040458] [2022-11-25 23:19:26,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:19:26,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:19:26,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:19:26,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:19:26,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:19:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:26,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:19:26,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:19:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-25 23:19:26,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:19:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-25 23:19:26,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383040458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:19:26,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1687045316] [2022-11-25 23:19:26,615 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:19:26,616 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:19:26,616 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:19:26,616 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:19:26,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:19:26,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:26,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:26,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:26,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:26,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:26,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:26,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:26,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:27,201 INFO L321 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-25 23:19:27,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-25 23:19:27,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:27,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:27,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:27,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:27,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:27,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:27,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:27,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:28,161 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-25 23:19:28,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-25 23:19:28,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:28,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:28,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:19:28,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:28,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:28,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:28,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:28,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:28,851 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:19:28,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-25 23:19:30,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:30,410 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:19:30,411 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:19:30,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:30,447 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:30,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:30,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:30,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:30,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:30,515 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:30,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:30,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:30,576 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:30,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:30,612 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:30,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:30,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:30,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:30,723 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:30,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:30,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:30,797 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:30,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:30,832 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:30,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:30,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:30,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:30,923 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:19:30,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:19:31,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,029 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:31,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:31,063 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:31,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:31,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,167 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:31,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:31,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,255 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:31,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:31,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,310 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:31,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:31,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,372 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:31,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:31,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,451 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:31,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:31,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,510 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:31,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:31,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:31,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,579 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:31,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:31,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,637 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:31,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:31,697 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:31,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:31,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,812 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:31,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:31,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,910 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:31,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:31,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,947 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:31,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:31,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:31,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:31,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:32,004 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:32,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:32,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:32,064 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:32,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:32,088 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:19:32,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1867#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:19:32,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:19:32,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:19:32,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-25 23:19:32,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107896708] [2022-11-25 23:19:32,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:19:32,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:19:32,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:32,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:19:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-25 23:19:32,670 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 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) [2022-11-25 23:19:32,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:32,779 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2022-11-25 23:19:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:19:32,780 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 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 55 [2022-11-25 23:19:32,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:32,784 INFO L225 Difference]: With dead ends: 114 [2022-11-25 23:19:32,784 INFO L226 Difference]: Without dead ends: 69 [2022-11-25 23:19:32,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-25 23:19:32,790 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:32,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:19:32,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-25 23:19:32,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-25 23:19:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 68 states have internal predecessors, (78), 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) [2022-11-25 23:19:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2022-11-25 23:19:32,816 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 55 [2022-11-25 23:19:32,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:32,817 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2022-11-25 23:19:32,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 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) [2022-11-25 23:19:32,817 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2022-11-25 23:19:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-25 23:19:32,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:32,823 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:32,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:19:33,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 23:19:33,030 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:33,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:33,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1898510273, now seen corresponding path program 5 times [2022-11-25 23:19:33,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:33,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691908953] [2022-11-25 23:19:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:33,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-25 23:19:34,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:34,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691908953] [2022-11-25 23:19:34,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691908953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:19:34,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117210408] [2022-11-25 23:19:34,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:19:34,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:19:34,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:19:34,161 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:19:34,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:19:34,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:19:34,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:19:34,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:19:34,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:19:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-25 23:19:35,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:19:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-25 23:19:35,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117210408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:19:35,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458854567] [2022-11-25 23:19:35,125 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:19:35,125 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:19:35,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:19:35,126 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:19:35,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:19:35,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:35,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:35,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:35,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:35,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:35,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:35,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:35,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:35,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,004 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-25 23:19:36,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-25 23:19:36,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-25 23:19:36,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:19:36,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:36,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:36,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:36,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:36,644 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:19:36,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-25 23:19:38,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,113 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:19:38,113 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:19:38,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,151 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:38,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:38,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:38,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,203 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:38,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:38,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,272 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:38,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:38,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,314 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:38,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:38,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:38,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,375 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:38,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:38,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,446 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:38,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:38,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,506 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:38,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:38,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:38,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,565 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:38,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:38,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,623 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:38,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:38,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,656 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:38,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:38,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:38,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,707 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:38,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:38,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,762 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:38,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:38,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,794 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:38,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:38,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,849 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:38,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:38,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:38,916 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:38,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:38,979 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:38,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:39,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,085 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:19:39,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:19:39,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,220 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:39,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:39,257 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:39,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:39,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,347 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:39,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:39,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,415 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:39,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:39,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,447 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:39,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:39,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:39,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,513 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:39,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:39,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:39,569 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:39,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:39,590 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:19:40,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2655#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:19:40,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:19:40,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:19:40,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-25 23:19:40,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843680034] [2022-11-25 23:19:40,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:19:40,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 23:19:40,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:40,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 23:19:40,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 23:19:40,643 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:19:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:40,974 INFO L93 Difference]: Finished difference Result 163 states and 229 transitions. [2022-11-25 23:19:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 23:19:40,975 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-25 23:19:40,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:40,977 INFO L225 Difference]: With dead ends: 163 [2022-11-25 23:19:40,977 INFO L226 Difference]: Without dead ends: 118 [2022-11-25 23:19:40,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 175 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 23:19:40,980 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:40,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:19:40,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-25 23:19:40,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-11-25 23:19:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 117 states have internal predecessors, (127), 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) [2022-11-25 23:19:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2022-11-25 23:19:41,003 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 67 [2022-11-25 23:19:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:41,005 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2022-11-25 23:19:41,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:19:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2022-11-25 23:19:41,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-25 23:19:41,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:41,010 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:41,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:19:41,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 23:19:41,211 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:41,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:41,211 INFO L85 PathProgramCache]: Analyzing trace with hash -888773949, now seen corresponding path program 6 times [2022-11-25 23:19:41,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:41,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189670582] [2022-11-25 23:19:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:41,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-25 23:19:42,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:42,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189670582] [2022-11-25 23:19:42,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189670582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:19:42,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194837325] [2022-11-25 23:19:42,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:19:42,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:19:42,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:19:42,639 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:19:42,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:19:43,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:19:43,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:19:43,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:19:43,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:19:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-25 23:19:43,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:19:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-25 23:19:44,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194837325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:19:44,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335775242] [2022-11-25 23:19:44,012 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:19:44,012 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:19:44,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:19:44,013 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:19:44,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:19:44,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,806 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-25 23:19:44,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-25 23:19:44,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:44,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-25 23:19:45,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:45,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:45,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 23:19:45,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:45,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:45,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:45,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:45,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:45,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:45,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:45,401 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 23:19:45,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 920 treesize of output 888 [2022-11-25 23:19:45,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:45,739 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:19:45,739 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:19:45,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:45,808 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:45,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:45,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:45,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:45,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:45,883 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:45,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:45,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:45,948 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:45,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:45,978 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:45,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:46,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,083 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:19:46,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:19:46,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,172 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:46,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:46,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,204 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:46,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:46,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,270 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:46,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:46,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,322 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:46,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:46,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,356 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:46,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:46,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:46,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,414 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:46,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:46,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,464 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:46,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:46,492 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:46,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:46,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,610 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:19:46,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:19:46,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,686 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:46,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:46,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,719 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:46,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:46,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:46,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,781 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:46,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:46,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,837 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:46,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:46,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,863 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:46,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:46,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,912 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:46,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:46,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:46,980 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:46,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:47,047 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:47,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:47,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:47,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:47,138 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:47,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:47,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:47,228 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:47,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:47,246 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:19:48,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3949#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:19:48,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:19:48,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:19:48,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-25 23:19:48,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352320431] [2022-11-25 23:19:48,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:19:48,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-25 23:19:48,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:19:48,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-25 23:19:48,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 23:19:48,278 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 states have internal predecessors, (71), 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) [2022-11-25 23:19:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:19:48,448 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2022-11-25 23:19:48,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-25 23:19:48,449 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 states have internal predecessors, (71), 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 116 [2022-11-25 23:19:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:19:48,450 INFO L225 Difference]: With dead ends: 236 [2022-11-25 23:19:48,450 INFO L226 Difference]: Without dead ends: 143 [2022-11-25 23:19:48,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 306 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 23:19:48,452 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:19:48,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:19:48,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-25 23:19:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-11-25 23:19:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0704225352112675) internal successors, (152), 142 states have internal predecessors, (152), 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) [2022-11-25 23:19:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2022-11-25 23:19:48,468 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 116 [2022-11-25 23:19:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:19:48,469 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2022-11-25 23:19:48,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 states have internal predecessors, (71), 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) [2022-11-25 23:19:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2022-11-25 23:19:48,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-25 23:19:48,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:19:48,477 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:19:48,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:19:48,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 23:19:48,688 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:19:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:19:48,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1186050815, now seen corresponding path program 7 times [2022-11-25 23:19:48,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:19:48,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759027033] [2022-11-25 23:19:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:19:48,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:19:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-25 23:19:52,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:19:52,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759027033] [2022-11-25 23:19:52,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759027033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:19:52,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598337716] [2022-11-25 23:19:52,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:19:52,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:19:52,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:19:52,234 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:19:52,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:19:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:19:52,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 23:19:52,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:19:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-25 23:19:52,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:19:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-25 23:19:55,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598337716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:19:55,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [751577897] [2022-11-25 23:19:55,940 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:19:55,940 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:19:55,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:19:55,940 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:19:55,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:19:55,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:55,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:55,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:55,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:55,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:55,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:55,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:55,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:55,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:56,438 INFO L321 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-25 23:19:56,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-25 23:19:56,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:56,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:56,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:56,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:56,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:56,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:56,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:56,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:56,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:57,377 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-25 23:19:57,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-25 23:19:57,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:57,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:57,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:19:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:19:57,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:57,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:57,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:57,955 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:19:57,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-25 23:19:59,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:59,362 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:19:59,363 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:19:59,398 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:59,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:59,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:59,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:59,489 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:59,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:59,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:59,556 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:59,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:59,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:59,587 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:59,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:59,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:59,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:59,639 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:19:59,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:19:59,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:59,694 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:59,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:59,754 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:59,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:19:59,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:59,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:59,835 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:19:59,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:19:59,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:19:59,933 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:19:59,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:19:59,968 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:19:59,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:20:00,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,051 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:20:00,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:20:00,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,130 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:00,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:00,160 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:20:00,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:20:00,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,252 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:20:00,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:20:00,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,316 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:00,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:00,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,345 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:00,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:00,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:00,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,425 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:20:00,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:20:00,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,475 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:00,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:00,518 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:20:00,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:20:00,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,600 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:20:00,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:20:00,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,715 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:00,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:00,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,749 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:00,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:00,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,803 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:20:00,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:20:00,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:00,858 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:00,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:00,876 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:20:02,427 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5639#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:20:02,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:20:02,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:20:02,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-25 23:20:02,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329774725] [2022-11-25 23:20:02,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:20:02,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-25 23:20:02,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:02,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-25 23:20:02,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-25 23:20:02,433 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 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) [2022-11-25 23:20:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:02,665 INFO L93 Difference]: Finished difference Result 286 states and 353 transitions. [2022-11-25 23:20:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-25 23:20:02,666 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 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 141 [2022-11-25 23:20:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:02,667 INFO L225 Difference]: With dead ends: 286 [2022-11-25 23:20:02,667 INFO L226 Difference]: Without dead ends: 193 [2022-11-25 23:20:02,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 356 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-25 23:20:02,671 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:20:02,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:20:02,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-25 23:20:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-11-25 23:20:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0520833333333333) internal successors, (202), 192 states have internal predecessors, (202), 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) [2022-11-25 23:20:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 202 transitions. [2022-11-25 23:20:02,686 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 202 transitions. Word has length 141 [2022-11-25 23:20:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:20:02,686 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 202 transitions. [2022-11-25 23:20:02,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 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) [2022-11-25 23:20:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 202 transitions. [2022-11-25 23:20:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-25 23:20:02,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:20:02,689 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:20:02,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:20:02,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:20:02,898 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:20:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:20:02,898 INFO L85 PathProgramCache]: Analyzing trace with hash -215865473, now seen corresponding path program 8 times [2022-11-25 23:20:02,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:20:02,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185868083] [2022-11-25 23:20:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:02,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:20:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-25 23:20:12,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:12,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185868083] [2022-11-25 23:20:12,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185868083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:20:12,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812623448] [2022-11-25 23:20:12,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:20:12,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:20:12,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:20:12,096 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:20:12,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:20:33,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 23:20:33,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:20:33,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:20:33,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:20:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 98 proven. 55 refuted. 0 times theorem prover too weak. 5138 trivial. 0 not checked. [2022-11-25 23:20:34,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:20:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 5226 trivial. 0 not checked. [2022-11-25 23:20:35,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812623448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:20:35,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032981354] [2022-11-25 23:20:35,138 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:20:35,138 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:20:35,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:20:35,139 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:20:35,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:20:35,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,626 INFO L321 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-25 23:20:35,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-25 23:20:35,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:35,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:36,450 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-25 23:20:36,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-25 23:20:36,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:36,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:36,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 23:20:36,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:36,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:36,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:36,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:36,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:36,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:36,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:36,995 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 23:20:36,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 920 treesize of output 888 [2022-11-25 23:20:37,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:37,273 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:20:37,273 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:20:37,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:37,318 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:37,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:37,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:37,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:37,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:37,366 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:20:37,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:20:37,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:37,420 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:37,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:37,455 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:20:37,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:20:37,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:37,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:37,556 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:20:37,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:20:37,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:37,650 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:37,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:37,679 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:20:37,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:20:37,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:37,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:37,772 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:20:37,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:20:37,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:37,835 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:37,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:37,861 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:20:37,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:20:37,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:37,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:37,944 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:20:37,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:20:38,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,024 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:38,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:38,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,057 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:38,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:38,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:38,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,118 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:20:38,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:20:38,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,187 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:38,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:38,237 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:20:38,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:20:38,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,317 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:20:38,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:20:38,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,400 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:38,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:38,428 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:20:38,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:20:38,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,525 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:20:38,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:20:38,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,625 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:38,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:38,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,659 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:38,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:38,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:20:38,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,716 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:20:38,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:20:38,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:20:38,803 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:20:38,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:20:38,821 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:20:41,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7852#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:20:41,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:20:41,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:20:41,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 14, 13] total 124 [2022-11-25 23:20:41,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240588762] [2022-11-25 23:20:41,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:20:41,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-25 23:20:41,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:20:41,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-25 23:20:41,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5446, Invalid=11066, Unknown=0, NotChecked=0, Total=16512 [2022-11-25 23:20:41,633 INFO L87 Difference]: Start difference. First operand 193 states and 202 transitions. Second operand has 124 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 124 states have internal predecessors, (148), 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) [2022-11-25 23:20:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:20:43,690 INFO L93 Difference]: Finished difference Result 383 states and 497 transitions. [2022-11-25 23:20:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-11-25 23:20:43,690 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 124 states have internal predecessors, (148), 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 191 [2022-11-25 23:20:43,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:20:43,692 INFO L225 Difference]: With dead ends: 383 [2022-11-25 23:20:43,692 INFO L226 Difference]: Without dead ends: 290 [2022-11-25 23:20:43,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 533 SyntacticMatches, 11 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4600 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=5996, Invalid=16654, Unknown=0, NotChecked=0, Total=22650 [2022-11-25 23:20:43,700 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 198 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:20:43,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 52 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:20:43,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-25 23:20:43,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-11-25 23:20:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0346020761245676) internal successors, (299), 289 states have internal predecessors, (299), 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) [2022-11-25 23:20:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 299 transitions. [2022-11-25 23:20:43,720 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 299 transitions. Word has length 191 [2022-11-25 23:20:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:20:43,721 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 299 transitions. [2022-11-25 23:20:43,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 124 states have internal predecessors, (148), 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) [2022-11-25 23:20:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 299 transitions. [2022-11-25 23:20:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-11-25 23:20:43,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:20:43,725 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:20:43,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:20:43,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:20:43,939 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:20:43,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:20:43,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2087274563, now seen corresponding path program 9 times [2022-11-25 23:20:43,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:20:43,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454849875] [2022-11-25 23:20:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:20:43,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:20:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:20:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-25 23:20:53,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:20:53,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454849875] [2022-11-25 23:20:53,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454849875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:20:53,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747421840] [2022-11-25 23:20:53,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:20:53,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:20:53,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:20:53,786 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:20:53,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:20:54,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:20:54,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:20:54,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 3141 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-25 23:20:54,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:20:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-25 23:20:54,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:21:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-25 23:21:06,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747421840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:21:06,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1797747979] [2022-11-25 23:21:06,945 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:21:06,945 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:21:06,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:21:06,945 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:21:06,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:21:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,789 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-25 23:21:07,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-25 23:21:07,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-25 23:21:07,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:07,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 23:21:08,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:08,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:08,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:08,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:08,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:08,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:08,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:08,324 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 23:21:08,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 920 treesize of output 888 [2022-11-25 23:21:08,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:08,595 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:21:08,596 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:21:08,627 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:21:08,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:21:08,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:08,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:08,709 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:21:08,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:21:08,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:08,831 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:21:08,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:21:08,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:08,866 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:21:08,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:21:08,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:08,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:08,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:08,929 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:21:08,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:21:08,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:08,997 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:21:08,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:21:09,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,049 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:21:09,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:21:09,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:09,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,099 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:21:09,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:21:09,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,154 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:21:09,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:21:09,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,186 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:21:09,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:21:09,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:09,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,237 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:21:09,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:21:09,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,287 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:21:09,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:21:09,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,329 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:21:09,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:21:09,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,386 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:21:09,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:21:09,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,473 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:21:09,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:21:09,534 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:21:09,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:21:09,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,633 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:21:09,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:21:09,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,766 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:21:09,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:21:09,817 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:21:09,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:21:09,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:09,978 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:21:09,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:21:10,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:10,072 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:21:10,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:21:10,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:10,112 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:21:10,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:21:10,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:21:10,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:10,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:10,173 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:21:10,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:21:10,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:21:10,223 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:21:10,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:21:10,244 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:21:18,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11158#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:21:18,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:21:18,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:21:18,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-25 23:21:18,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954322812] [2022-11-25 23:21:18,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:21:18,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-25 23:21:18,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:21:18,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-25 23:21:18,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-25 23:21:18,443 INFO L87 Difference]: Start difference. First operand 290 states and 299 transitions. Second operand has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 202 states have internal predecessors, (223), 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) [2022-11-25 23:21:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:21:19,147 INFO L93 Difference]: Finished difference Result 580 states and 698 transitions. [2022-11-25 23:21:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-25 23:21:19,148 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 202 states have internal predecessors, (223), 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 288 [2022-11-25 23:21:19,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:21:19,154 INFO L225 Difference]: With dead ends: 580 [2022-11-25 23:21:19,155 INFO L226 Difference]: Without dead ends: 391 [2022-11-25 23:21:19,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 711 SyntacticMatches, 46 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15696 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-25 23:21:19,160 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:21:19,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:21:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-25 23:21:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2022-11-25 23:21:19,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.0256410256410255) internal successors, (400), 390 states have internal predecessors, (400), 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) [2022-11-25 23:21:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 400 transitions. [2022-11-25 23:21:19,180 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 400 transitions. Word has length 288 [2022-11-25 23:21:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:21:19,180 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 400 transitions. [2022-11-25 23:21:19,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 202 states have internal predecessors, (223), 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) [2022-11-25 23:21:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 400 transitions. [2022-11-25 23:21:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-11-25 23:21:19,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:21:19,188 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:21:19,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 23:21:19,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:19,399 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:21:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:21:19,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1701572225, now seen corresponding path program 10 times [2022-11-25 23:21:19,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:21:19,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189029868] [2022-11-25 23:21:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:21:19,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:21:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-25 23:21:51,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:21:51,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189029868] [2022-11-25 23:21:51,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189029868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:21:51,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144999889] [2022-11-25 23:21:51,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:21:51,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:21:51,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:21:51,882 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:21:51,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:21:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:21:53,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 4858 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-25 23:21:53,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:21:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-25 23:21:53,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:22:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-25 23:22:41,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144999889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:22:41,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [414232368] [2022-11-25 23:22:41,870 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:22:41,870 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:22:41,870 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:22:41,871 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:22:41,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:22:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:41,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:41,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:41,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:41,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:41,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:41,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:41,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:42,651 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-25 23:22:42,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-25 23:22:42,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:42,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:42,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:42,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:42,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:42,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:42,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:42,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:42,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:42,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-25 23:22:42,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:42,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:42,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 23:22:43,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:43,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:43,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:43,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:43,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:43,181 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 23:22:43,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-25 23:22:44,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:44,551 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 23:22:44,551 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 23:22:44,585 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:22:44,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:22:44,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:44,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:44,679 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:22:44,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:22:44,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:44,754 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:22:44,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:22:44,787 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:22:44,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:22:44,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:44,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:44,860 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:22:44,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:22:44,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:44,946 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:22:44,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:22:44,974 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:22:44,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:22:45,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,052 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:22:45,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:22:45,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,154 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:22:45,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:22:45,185 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:22:45,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:22:45,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,287 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:22:45,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:22:45,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,412 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:22:45,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:22:45,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,440 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:22:45,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:22:45,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:45,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,493 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:22:45,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:22:45,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,563 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:22:45,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:22:45,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,611 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:22:45,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:22:45,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:22:45,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,667 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 23:22:45,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-25 23:22:45,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,720 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:22:45,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:22:45,748 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:22:45,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:22:45,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,844 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 23:22:45,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 141 [2022-11-25 23:22:45,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:45,968 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:22:45,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:22:46,003 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 23:22:46,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 23:22:46,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:46,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:46,102 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 23:22:46,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 131 [2022-11-25 23:22:46,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:22:46,170 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 23:22:46,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 23:22:46,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:22:54,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15824#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:22:54,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:22:54,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:22:54,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-25 23:22:54,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034997227] [2022-11-25 23:22:54,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:22:54,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-25 23:22:54,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:22:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-25 23:22:54,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-25 23:22:54,471 INFO L87 Difference]: Start difference. First operand 391 states and 400 transitions. Second operand has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 404 states have internal predecessors, (425), 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) [2022-11-25 23:22:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:22:57,149 INFO L93 Difference]: Finished difference Result 782 states and 1001 transitions. [2022-11-25 23:22:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-25 23:22:57,150 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 404 states have internal predecessors, (425), 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 389 [2022-11-25 23:22:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:22:57,152 INFO L225 Difference]: With dead ends: 782 [2022-11-25 23:22:57,152 INFO L226 Difference]: Without dead ends: 593 [2022-11-25 23:22:57,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 936 SyntacticMatches, 23 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17684 ImplicationChecksByTransitivity, 71.8s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-25 23:22:57,159 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:22:57,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:22:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-25 23:22:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2022-11-25 23:22:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 1.0168918918918919) internal successors, (602), 592 states have internal predecessors, (602), 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) [2022-11-25 23:22:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 602 transitions. [2022-11-25 23:22:57,187 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 602 transitions. Word has length 389 [2022-11-25 23:22:57,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:22:57,188 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 602 transitions. [2022-11-25 23:22:57,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 404 states have internal predecessors, (425), 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) [2022-11-25 23:22:57,189 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 602 transitions. [2022-11-25 23:22:57,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2022-11-25 23:22:57,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:22:57,193 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:22:57,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:22:57,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 23:22:57,398 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:22:57,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:22:57,398 INFO L85 PathProgramCache]: Analyzing trace with hash 392776703, now seen corresponding path program 11 times [2022-11-25 23:22:57,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:22:57,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645600178] [2022-11-25 23:22:57,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:22:57,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:22:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:25:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 83027 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-25 23:25:04,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:25:04,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645600178] [2022-11-25 23:25:04,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645600178] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:25:04,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272586082] [2022-11-25 23:25:04,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:25:04,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:25:04,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:25:04,767 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:25:04,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65d2440-f694-4f76-8c20-8bc3ca10d929/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process