./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/res2o.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/res2o.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:40:23,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:40:23,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:40:23,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:40:23,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:40:23,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:40:23,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:40:23,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:40:23,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:40:23,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:40:23,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:40:23,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:40:23,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:40:23,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:40:23,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:40:23,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:40:23,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:40:23,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:40:23,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:40:23,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:40:23,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:40:23,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:40:23,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:40:23,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:40:23,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:40:23,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:40:23,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:40:23,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:40:23,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:40:23,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:40:23,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:40:23,541 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:40:23,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:40:23,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:40:23,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:40:23,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:40:23,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:40:23,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:40:23,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:40:23,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:40:23,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:40:23,550 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:40:23,573 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:40:23,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:40:23,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:40:23,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:40:23,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:40:23,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:40:23,575 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:40:23,576 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:40:23,576 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:40:23,576 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:40:23,577 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:40:23,577 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:40:23,577 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:40:23,577 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:40:23,578 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:40:23,578 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:40:23,578 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:40:23,579 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:40:23,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:40:23,580 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:40:23,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:40:23,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:40:23,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:40:23,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:40:23,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:40:23,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:40:23,581 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:40:23,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:40:23,582 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:40:23,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:40:23,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:40:23,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:40:23,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:40:23,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:40:23,583 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:40:23,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:40:23,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:40:23,584 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:40:23,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:40:23,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:40:23,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:40:23,585 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_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d [2022-11-03 02:40:23,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:40:23,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:40:23,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:40:23,904 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:40:23,905 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:40:23,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/res2o.c [2022-11-03 02:40:23,978 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/data/8b068af8b/e7b79e817a7949ceace1256aedc4ef3e/FLAG28107557d [2022-11-03 02:40:24,504 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:40:24,507 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/sv-benchmarks/c/array-fpi/res2o.c [2022-11-03 02:40:24,514 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/data/8b068af8b/e7b79e817a7949ceace1256aedc4ef3e/FLAG28107557d [2022-11-03 02:40:24,873 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/data/8b068af8b/e7b79e817a7949ceace1256aedc4ef3e [2022-11-03 02:40:24,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:40:24,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:40:24,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:40:24,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:40:24,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:40:24,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:40:24" (1/1) ... [2022-11-03 02:40:24,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@537bbc41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:24, skipping insertion in model container [2022-11-03 02:40:24,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:40:24" (1/1) ... [2022-11-03 02:40:24,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:40:24,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:40:25,081 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2022-11-03 02:40:25,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:40:25,110 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:40:25,126 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2022-11-03 02:40:25,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:40:25,154 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:40:25,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:25 WrapperNode [2022-11-03 02:40:25,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:40:25,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:40:25,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:40:25,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:40:25,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:25" (1/1) ... [2022-11-03 02:40:25,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:25" (1/1) ... [2022-11-03 02:40:25,192 INFO L138 Inliner]: procedures = 17, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 113 [2022-11-03 02:40:25,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:40:25,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:40:25,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:40:25,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:40:25,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:25" (1/1) ... [2022-11-03 02:40:25,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:25" (1/1) ... [2022-11-03 02:40:25,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:25" (1/1) ... [2022-11-03 02:40:25,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:25" (1/1) ... [2022-11-03 02:40:25,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:25" (1/1) ... [2022-11-03 02:40:25,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:25" (1/1) ... [2022-11-03 02:40:25,217 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:25" (1/1) ... [2022-11-03 02:40:25,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:25" (1/1) ... [2022-11-03 02:40:25,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:40:25,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:40:25,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:40:25,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:40:25,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:25" (1/1) ... [2022-11-03 02:40:25,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:40:25,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:25,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:40:25,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:40:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:40:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:40:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:40:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:40:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:40:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:40:25,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:40:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:40:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:40:25,394 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:40:25,396 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:40:25,580 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:40:25,642 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:40:25,643 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-03 02:40:25,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:40:25 BoogieIcfgContainer [2022-11-03 02:40:25,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:40:25,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:40:25,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:40:25,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:40:25,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:40:24" (1/3) ... [2022-11-03 02:40:25,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9fe64b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:40:25, skipping insertion in model container [2022-11-03 02:40:25,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:40:25" (2/3) ... [2022-11-03 02:40:25,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d9fe64b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:40:25, skipping insertion in model container [2022-11-03 02:40:25,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:40:25" (3/3) ... [2022-11-03 02:40:25,661 INFO L112 eAbstractionObserver]: Analyzing ICFG res2o.c [2022-11-03 02:40:25,681 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:40:25,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:40:25,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:40:25,769 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;@217525a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:40:25,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:40:25,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:40:25,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:25,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:25,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:25,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:25,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1251409213, now seen corresponding path program 1 times [2022-11-03 02:40:25,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:25,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695997893] [2022-11-03 02:40:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:25,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:26,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:26,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695997893] [2022-11-03 02:40:26,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695997893] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:26,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:26,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:40:26,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28848545] [2022-11-03 02:40:26,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:26,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:40:26,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:26,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:40:26,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:40:26,276 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:26,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:26,339 INFO L93 Difference]: Finished difference Result 26 states and 39 transitions. [2022-11-03 02:40:26,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:40:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 02:40:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:26,350 INFO L225 Difference]: With dead ends: 26 [2022-11-03 02:40:26,359 INFO L226 Difference]: Without dead ends: 12 [2022-11-03 02:40:26,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:40:26,366 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:26,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:40:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-03 02:40:26,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-03 02:40:26,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-03 02:40:26,424 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 10 [2022-11-03 02:40:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:26,425 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-03 02:40:26,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-03 02:40:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:40:26,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:26,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:26,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:40:26,428 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:26,429 INFO L85 PathProgramCache]: Analyzing trace with hash -28237853, now seen corresponding path program 1 times [2022-11-03 02:40:26,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:26,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233032936] [2022-11-03 02:40:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:26,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:40:26,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:26,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233032936] [2022-11-03 02:40:26,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233032936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:26,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:26,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:40:26,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552399619] [2022-11-03 02:40:26,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:26,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:40:26,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:26,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:40:26,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:40:26,622 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:26,672 INFO L93 Difference]: Finished difference Result 24 states and 37 transitions. [2022-11-03 02:40:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:40:26,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 02:40:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:26,673 INFO L225 Difference]: With dead ends: 24 [2022-11-03 02:40:26,673 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 02:40:26,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:40:26,675 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:26,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:40:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 02:40:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-03 02:40:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-03 02:40:26,681 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 11 [2022-11-03 02:40:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:26,682 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-03 02:40:26,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-03 02:40:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:40:26,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:26,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:26,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:40:26,683 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:26,684 INFO L85 PathProgramCache]: Analyzing trace with hash -807325923, now seen corresponding path program 1 times [2022-11-03 02:40:26,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:26,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225841392] [2022-11-03 02:40:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:26,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:29,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:29,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225841392] [2022-11-03 02:40:29,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225841392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:29,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456190099] [2022-11-03 02:40:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:29,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:29,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:29,368 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:29,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:40:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:29,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 02:40:29,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:29,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:29,608 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:40:29,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2022-11-03 02:40:29,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:40:29,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:29,914 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:40:29,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:40:30,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:30,157 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:40:30,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:40:30,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:30,464 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:40:30,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 46 [2022-11-03 02:40:30,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:30,767 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:40:30,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 46 [2022-11-03 02:40:31,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:31,034 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:40:31,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 48 [2022-11-03 02:40:31,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:31,225 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:40:31,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 19 [2022-11-03 02:40:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:31,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:37,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456190099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:37,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2130269176] [2022-11-03 02:40:37,187 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:40:37,188 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:40:37,191 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:40:37,196 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:40:37,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:40:37,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:37,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:37,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:37,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:37,593 INFO L356 Elim1Store]: treesize reduction 250, result has 21.1 percent of original size [2022-11-03 02:40:37,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 90 [2022-11-03 02:40:37,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:37,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:40:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:37,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:37,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:37,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:37,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:37,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:37,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:38,006 INFO L356 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-11-03 02:40:38,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-11-03 02:40:38,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:38,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:38,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 02:40:38,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:38,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:38,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:38,383 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 02:40:38,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 504 treesize of output 500 [2022-11-03 02:40:38,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:40:38,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:38,634 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:40:38,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-03 02:40:38,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:40:38,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:38,772 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:40:38,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-03 02:40:38,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:40:38,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:38,880 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:40:38,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:40:38,989 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:40:38,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:40:39,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:39,083 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:40:39,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:40:39,198 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:40:39,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:40:39,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:39,289 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:40:39,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:40:39,377 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:40:39,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:40:39,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:40:40,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '281#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:40:40,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:40:40,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:40:40,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2022-11-03 02:40:40,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418123818] [2022-11-03 02:40:40,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:40,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 02:40:40,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:40,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 02:40:40,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1565, Unknown=1, NotChecked=0, Total=1806 [2022-11-03 02:40:40,458 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:42,048 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2022-11-03 02:40:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:40:42,050 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 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 16 [2022-11-03 02:40:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:42,051 INFO L225 Difference]: With dead ends: 25 [2022-11-03 02:40:42,051 INFO L226 Difference]: Without dead ends: 22 [2022-11-03 02:40:42,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=424, Invalid=2437, Unknown=1, NotChecked=0, Total=2862 [2022-11-03 02:40:42,054 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:42,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 45 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 100 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2022-11-03 02:40:42,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-03 02:40:42,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-11-03 02:40:42,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2022-11-03 02:40:42,062 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 16 [2022-11-03 02:40:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:42,062 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2022-11-03 02:40:42,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-11-03 02:40:42,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:40:42,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:42,064 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:42,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:42,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-03 02:40:42,286 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:42,287 INFO L85 PathProgramCache]: Analyzing trace with hash 185398045, now seen corresponding path program 2 times [2022-11-03 02:40:42,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:42,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033913073] [2022-11-03 02:40:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:42,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:40:42,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:42,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033913073] [2022-11-03 02:40:42,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033913073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:42,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783394205] [2022-11-03 02:40:42,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:40:42,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:42,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:42,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:42,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:40:42,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:40:42,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:40:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:40:42,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:40:42,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:40:42,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783394205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:42,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557498337] [2022-11-03 02:40:42,634 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:40:42,635 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:40:42,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:40:42,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:40:42,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:40:42,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:42,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:40:42,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:42,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:42,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:42,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:42,952 INFO L356 Elim1Store]: treesize reduction 250, result has 21.1 percent of original size [2022-11-03 02:40:42,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 90 [2022-11-03 02:40:42,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:42,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:42,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:43,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:43,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:43,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:43,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:43,287 INFO L356 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-11-03 02:40:43,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-11-03 02:40:43,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:43,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:43,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 02:40:43,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:43,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:43,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:43,653 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 02:40:43,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 504 treesize of output 500 [2022-11-03 02:40:43,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:40:43,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:43,875 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:40:43,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-03 02:40:43,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:40:43,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:43,995 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:40:43,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-03 02:40:44,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:40:44,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:44,099 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:40:44,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:40:44,185 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:40:44,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:40:44,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:44,293 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:40:44,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:40:44,408 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:40:44,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:40:44,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:44,495 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:40:44,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:40:44,605 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:40:44,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:40:44,649 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:40:45,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '496#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:40:45,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:40:45,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:40:45,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 02:40:45,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622070896] [2022-11-03 02:40:45,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:45,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:40:45,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:45,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:40:45,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:40:45,349 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:45,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:45,565 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-11-03 02:40:45,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:40:45,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 02:40:45,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:45,567 INFO L225 Difference]: With dead ends: 57 [2022-11-03 02:40:45,567 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 02:40:45,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:40:45,568 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:45,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 12 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:40:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 02:40:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-11-03 02:40:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:45,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-11-03 02:40:45,583 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 17 [2022-11-03 02:40:45,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:45,583 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-11-03 02:40:45,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:45,586 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-11-03 02:40:45,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:40:45,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:45,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:45,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:45,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:45,814 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:45,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:45,815 INFO L85 PathProgramCache]: Analyzing trace with hash 795195426, now seen corresponding path program 3 times [2022-11-03 02:40:45,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:45,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858952905] [2022-11-03 02:40:45,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:45,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:40:45,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:45,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858952905] [2022-11-03 02:40:45,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858952905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:45,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101669177] [2022-11-03 02:40:45,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:40:45,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:45,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:45,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:45,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:40:46,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:40:46,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:40:46,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:40:46,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:40:46,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:40:46,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101669177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:40:46,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1766221828] [2022-11-03 02:40:46,169 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:40:46,169 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:40:46,170 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:40:46,170 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:40:46,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:40:46,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:40:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,510 INFO L356 Elim1Store]: treesize reduction 250, result has 21.1 percent of original size [2022-11-03 02:40:46,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 90 [2022-11-03 02:40:46,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,870 INFO L356 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-11-03 02:40:46,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-11-03 02:40:46,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:46,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 02:40:47,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:47,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:47,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:47,194 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 02:40:47,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 504 treesize of output 500 [2022-11-03 02:40:47,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:40:47,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:47,413 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:40:47,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-03 02:40:47,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:40:47,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:47,525 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:40:47,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-03 02:40:47,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:40:47,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:47,626 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:40:47,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:40:47,738 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:40:47,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:40:47,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:47,844 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:40:47,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:40:47,942 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:40:47,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:40:48,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:48,035 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:40:48,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:40:48,133 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:40:48,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:40:48,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:40:48,730 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '772#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:40:48,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:40:48,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:40:48,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 02:40:48,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241582538] [2022-11-03 02:40:48,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:40:48,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:40:48,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:48,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:40:48,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:40:48,732 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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) [2022-11-03 02:40:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:48,909 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-11-03 02:40:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:40:48,911 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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 20 [2022-11-03 02:40:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:48,911 INFO L225 Difference]: With dead ends: 28 [2022-11-03 02:40:48,911 INFO L226 Difference]: Without dead ends: 23 [2022-11-03 02:40:48,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 11 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:40:48,912 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:48,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:40:48,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-03 02:40:48,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-03 02:40:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:40:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-03 02:40:48,919 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2022-11-03 02:40:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:48,920 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-03 02:40:48,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 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) [2022-11-03 02:40:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-03 02:40:48,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:40:48,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:48,924 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:40:48,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:49,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:49,138 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:49,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:49,139 INFO L85 PathProgramCache]: Analyzing trace with hash -418289731, now seen corresponding path program 4 times [2022-11-03 02:40:49,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:49,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536529828] [2022-11-03 02:40:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:49,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:53,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:53,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536529828] [2022-11-03 02:40:53,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536529828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:40:53,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598048715] [2022-11-03 02:40:53,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:40:53,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:53,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:53,098 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:53,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:40:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:53,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-03 02:40:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:53,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:53,231 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:40:53,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2022-11-03 02:40:53,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:40:53,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:40:53,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:53,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 02:40:53,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:53,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:53,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2022-11-03 02:40:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:53,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:53,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2022-11-03 02:40:54,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:54,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:54,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:54,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 67 [2022-11-03 02:40:54,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:54,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:54,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:54,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 74 [2022-11-03 02:40:54,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:40:54,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:54,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:54,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:54,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:54,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 87 [2022-11-03 02:40:54,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:54,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:54,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:55,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 80 [2022-11-03 02:40:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:55,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:55,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:55,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 82 [2022-11-03 02:40:55,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:55,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:55,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 81 [2022-11-03 02:40:56,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:56,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:56,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 81 [2022-11-03 02:40:56,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:56,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 80 [2022-11-03 02:40:56,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:40:56,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 30 [2022-11-03 02:40:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:56,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:41:16,381 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_345 Int) (v_ArrVal_343 Int) (v_ArrVal_341 Int) (v_ArrVal_340 Int) (v_ArrVal_350 Int) (v_ArrVal_338 Int) (v_ArrVal_348 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_338) (+ .cse2 |c_ULTIMATE.start_main_~c~0#1.offset| 4) v_ArrVal_340))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_348 (+ v_ArrVal_345 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_345)) |c_ULTIMATE.start_main_~b~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (not (<= v_ArrVal_343 (+ v_ArrVal_341 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_341)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (< (+ v_ArrVal_350 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_350)) |c_ULTIMATE.start_main_~c~0#1.base|) (+ |c_ULTIMATE.start_main_~c~0#1.offset| 4))) (+ (* c_~N~0 3) 1)) (not (<= v_ArrVal_340 1)) (not (<= v_ArrVal_345 (+ v_ArrVal_343 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_343)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (not (<= v_ArrVal_350 (+ v_ArrVal_348 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_348)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) (not (<= v_ArrVal_341 (+ (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= v_ArrVal_338 1)))))) is different from false [2022-11-03 02:43:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 4 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-03 02:43:16,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598048715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:43:16,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [143958759] [2022-11-03 02:43:16,845 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:43:16,845 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:43:16,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:43:16,846 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:43:16,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:43:16,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:16,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:16,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:16,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:16,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:16,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:16,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:17,213 INFO L356 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-11-03 02:43:17,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-11-03 02:43:17,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:17,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:17,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:17,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:17,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 25 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 57 [2022-11-03 02:43:17,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:17,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:43:17,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:17,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:17,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 02:43:17,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:17,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:17,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:43:17,591 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 02:43:17,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 504 treesize of output 500 [2022-11-03 02:43:17,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:43:17,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:43:17,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 73 [2022-11-03 02:43:17,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:43:17,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:43:17,890 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:43:17,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-03 02:43:17,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:43:17,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:17,981 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:43:17,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:43:18,117 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:43:18,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:43:18,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:18,219 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:43:18,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:43:18,334 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:43:18,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:43:18,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:43:18,425 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:43:18,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:43:18,565 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:43:18,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:43:18,613 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:43:22,885 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1055#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:43:22,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:43:22,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:43:22,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 57 [2022-11-03 02:43:22,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622240277] [2022-11-03 02:43:22,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:43:22,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-03 02:43:22,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:43:22,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-03 02:43:22,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3191, Unknown=44, NotChecked=116, Total=3660 [2022-11-03 02:43:22,890 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:45:23,719 WARN L234 SmtUtils]: Spent 34.68s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:45:26,299 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (+ (* c_~N~0 3) 1)) (.cse2 (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|)) (.cse4 (+ |c_ULTIMATE.start_main_~c~0#1.offset| 4))) (and (forall ((v_ArrVal_345 Int) (v_ArrVal_343 Int) (v_ArrVal_341 Int) (v_ArrVal_340 Int) (v_ArrVal_350 Int) (v_ArrVal_338 Int) (v_ArrVal_348 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| (let ((.cse7 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store .cse6 (+ .cse7 |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_338) (+ .cse7 |c_ULTIMATE.start_main_~c~0#1.offset| 4) v_ArrVal_340))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_348 (+ v_ArrVal_345 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_345)) |c_ULTIMATE.start_main_~b~0#1.base|) .cse2)))) (not (<= v_ArrVal_343 (+ v_ArrVal_341 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_341)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3)))) (< (+ v_ArrVal_350 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_350)) |c_ULTIMATE.start_main_~c~0#1.base|) .cse4)) .cse5) (not (<= v_ArrVal_340 1)) (not (<= v_ArrVal_345 (+ v_ArrVal_343 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_343)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (not (<= v_ArrVal_350 (+ v_ArrVal_348 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_348)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) (not (<= v_ArrVal_341 (+ (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= v_ArrVal_338 1)))))) (forall ((v_ArrVal_345 Int) (v_ArrVal_343 Int) (v_ArrVal_341 Int) (v_ArrVal_340 Int) (v_ArrVal_350 Int) (v_ArrVal_338 Int) (v_ArrVal_348 Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| (store (store .cse6 |c_ULTIMATE.start_main_~c~0#1.offset| v_ArrVal_338) .cse4 v_ArrVal_340)))) (let ((.cse9 (select .cse8 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_343 (+ v_ArrVal_341 (select (select (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_341)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3)))) (not (<= v_ArrVal_341 (+ (select (select .cse8 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (not (<= v_ArrVal_345 (+ v_ArrVal_343 (select (select (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_343)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (not (<= v_ArrVal_340 1)) (not (<= v_ArrVal_350 (+ v_ArrVal_348 (select (select (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_348)) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|)))) (< (+ v_ArrVal_350 (select (select (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_350)) |c_ULTIMATE.start_main_~c~0#1.base|) .cse4)) .cse5) (not (<= v_ArrVal_338 1)) (not (<= v_ArrVal_348 (+ v_ArrVal_345 (select (select (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_345)) |c_ULTIMATE.start_main_~b~0#1.base|) .cse2)))))))))) is different from false [2022-11-03 02:45:53,691 WARN L234 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 165 DAG size of output: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:47:47,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:47,473 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-11-03 02:47:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-03 02:47:47,475 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 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 22 [2022-11-03 02:47:47,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:47,477 INFO L225 Difference]: With dead ends: 72 [2022-11-03 02:47:47,477 INFO L226 Difference]: Without dead ends: 69 [2022-11-03 02:47:47,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 15 SyntacticMatches, 11 SemanticMatches, 86 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2549 ImplicationChecksByTransitivity, 409.0s TimeCoverageRelationStatistics Valid=749, Invalid=6483, Unknown=86, NotChecked=338, Total=7656 [2022-11-03 02:47:47,486 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:47,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 74 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 214 Invalid, 0 Unknown, 381 Unchecked, 0.5s Time] [2022-11-03 02:47:47,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-03 02:47:47,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2022-11-03 02:47:47,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2022-11-03 02:47:47,529 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 22 [2022-11-03 02:47:47,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:47,530 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2022-11-03 02:47:47,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2022-11-03 02:47:47,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 02:47:47,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:47,533 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:47,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:47,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:47,746 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:47,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:47,746 INFO L85 PathProgramCache]: Analyzing trace with hash -166007597, now seen corresponding path program 5 times [2022-11-03 02:47:47,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:47,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401271177] [2022-11-03 02:47:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:47,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:47:47,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:47,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401271177] [2022-11-03 02:47:47,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401271177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:47,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066284053] [2022-11-03 02:47:47,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:47:47,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:47,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:47,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:47,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:47:48,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:47:48,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:48,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:47:48,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:47:48,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:47:48,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066284053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:48,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [382697352] [2022-11-03 02:47:48,434 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:47:48,434 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:47:48,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:47:48,435 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:47:48,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:47:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,855 INFO L356 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-11-03 02:47:48,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-11-03 02:47:48,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 25 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 57 [2022-11-03 02:47:48,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:47:48,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:48,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 02:47:49,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:49,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:49,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:49,250 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 02:47:49,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 504 treesize of output 500 [2022-11-03 02:47:49,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:47:49,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:47:49,461 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:47:49,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-03 02:47:49,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:47:49,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:47:49,582 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:47:49,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-03 02:47:49,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:47:49,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:49,705 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:47:49,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:47:49,810 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:47:49,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:47:49,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:49,914 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:47:49,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:47:50,044 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:47:50,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:47:50,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:50,157 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:47:50,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:47:50,266 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:47:50,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:47:50,292 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:47:51,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1480#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:47:51,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:47:51,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:47:51,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-03 02:47:51,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845915669] [2022-11-03 02:47:51,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:51,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:47:51,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:51,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:47:51,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:47:51,041 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2022-11-03 02:47:51,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:51,377 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2022-11-03 02:47:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:47:51,377 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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 23 [2022-11-03 02:47:51,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:51,378 INFO L225 Difference]: With dead ends: 98 [2022-11-03 02:47:51,378 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 02:47:51,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:47:51,380 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:51,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 14 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:47:51,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 02:47:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2022-11-03 02:47:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-11-03 02:47:51,400 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 23 [2022-11-03 02:47:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:51,400 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-11-03 02:47:51,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2022-11-03 02:47:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-11-03 02:47:51,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:47:51,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:51,402 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:51,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:51,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:51,609 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:51,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:51,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2025626749, now seen corresponding path program 6 times [2022-11-03 02:47:51,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:51,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851260715] [2022-11-03 02:47:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:51,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:47:51,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:51,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851260715] [2022-11-03 02:47:51,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851260715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:51,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331537910] [2022-11-03 02:47:51,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:47:51,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:51,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:51,830 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:51,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:47:52,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:47:52,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:47:52,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:47:52,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:47:52,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:47:52,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331537910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:52,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61812339] [2022-11-03 02:47:52,365 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:47:52,365 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:47:52,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:47:52,366 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:47:52,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:47:52,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:47:52,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,717 INFO L356 Elim1Store]: treesize reduction 250, result has 21.1 percent of original size [2022-11-03 02:47:52,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 90 [2022-11-03 02:47:52,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:52,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,144 INFO L356 Elim1Store]: treesize reduction 303, result has 18.8 percent of original size [2022-11-03 02:47:53,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 121 [2022-11-03 02:47:53,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:47:53,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:47:53,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:53,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:53,449 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 02:47:53,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 499 treesize of output 501 [2022-11-03 02:47:53,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:47:53,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:47:53,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 73 [2022-11-03 02:47:53,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:47:53,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:47:53,870 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:47:53,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 77 [2022-11-03 02:47:53,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:47:53,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:53,997 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:47:53,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:47:54,110 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:47:54,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:47:54,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:54,205 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:47:54,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:47:54,321 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:47:54,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:47:54,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:47:54,407 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:47:54,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:47:54,519 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:47:54,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:47:54,573 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:47:55,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1910#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem20#1| (* 3 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:47:55,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:47:55,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:47:55,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-11-03 02:47:55,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147836545] [2022-11-03 02:47:55,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:55,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:47:55,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:55,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:47:55,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:47:55,529 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:56,189 INFO L93 Difference]: Finished difference Result 88 states and 118 transitions. [2022-11-03 02:47:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:47:56,190 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-03 02:47:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:56,192 INFO L225 Difference]: With dead ends: 88 [2022-11-03 02:47:56,192 INFO L226 Difference]: Without dead ends: 58 [2022-11-03 02:47:56,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 14 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:47:56,194 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:56,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:47:56,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-03 02:47:56,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-11-03 02:47:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-11-03 02:47:56,216 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2022-11-03 02:47:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:56,216 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-11-03 02:47:56,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:47:56,217 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-11-03 02:47:56,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:47:56,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:56,218 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:56,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:56,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:56,422 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:56,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash 596492701, now seen corresponding path program 7 times [2022-11-03 02:47:56,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:56,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048860213] [2022-11-03 02:47:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:56,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:04,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:48:04,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048860213] [2022-11-03 02:48:04,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048860213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:48:04,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892323322] [2022-11-03 02:48:04,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:48:04,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:48:04,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:48:04,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:48:04,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:48:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:48:04,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-03 02:48:04,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:48:04,827 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:48:04,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-11-03 02:48:04,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:48:04,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:48:05,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:05,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 02:48:05,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:05,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:05,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 02:48:05,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:05,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:05,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2022-11-03 02:48:05,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:06,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:06,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:06,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 67 [2022-11-03 02:48:06,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:06,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:06,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:06,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:06,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 76 [2022-11-03 02:48:06,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:06,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:06,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:06,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:06,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 91 [2022-11-03 02:48:07,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:07,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:07,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:07,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:07,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:07,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 98 [2022-11-03 02:48:07,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:07,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:07,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:07,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:07,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:07,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:07,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 110 [2022-11-03 02:48:08,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:08,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 123 [2022-11-03 02:48:08,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:48:08,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 126 [2022-11-03 02:48:08,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:08,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 116 [2022-11-03 02:48:09,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:09,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:09,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:09,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:09,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 117 [2022-11-03 02:48:10,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:10,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:10,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:10,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:10,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 118 [2022-11-03 02:48:10,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:10,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:10,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 12 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 115 [2022-11-03 02:48:11,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:11,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:11,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 12 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 116 [2022-11-03 02:48:11,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:11,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:48:11,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 12 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 117 [2022-11-03 02:48:12,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 9 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 114 [2022-11-03 02:48:12,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 9 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 43 [2022-11-03 02:48:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:48:12,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:48:56,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-11-03 02:48:56,617 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-03 02:48:56,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2022-11-03 02:48:56,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1469663321] [2022-11-03 02:48:56,621 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:48:56,621 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:48:56,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:48:56,621 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:48:56,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:48:56,627 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:274) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 44 more [2022-11-03 02:48:56,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:48:56,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-11-03 02:48:56,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268240385] [2022-11-03 02:48:56,632 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:56,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 02:48:56,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:48:56,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 02:48:56,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=3232, Unknown=1, NotChecked=0, Total=3540 [2022-11-03 02:48:56,634 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 27 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:48:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:48:56,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=307, Invalid=3232, Unknown=1, NotChecked=0, Total=3540 [2022-11-03 02:48:56,641 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:48:56,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:48:56,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:48:56,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 02:48:56,862 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@136b0bf9 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:460) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:104) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:48:56,867 INFO L158 Benchmark]: Toolchain (without parser) took 511990.02ms. Allocated memory was 96.5MB in the beginning and 299.9MB in the end (delta: 203.4MB). Free memory was 62.1MB in the beginning and 156.5MB in the end (delta: -94.3MB). Peak memory consumption was 107.9MB. Max. memory is 16.1GB. [2022-11-03 02:48:56,867 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 96.5MB. Free memory was 68.7MB in the beginning and 68.6MB in the end (delta: 21.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:48:56,868 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.73ms. Allocated memory is still 96.5MB. Free memory was 61.8MB in the beginning and 71.4MB in the end (delta: -9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:48:56,868 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.88ms. Allocated memory is still 96.5MB. Free memory was 71.4MB in the beginning and 69.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:48:56,869 INFO L158 Benchmark]: Boogie Preprocessor took 27.40ms. Allocated memory is still 96.5MB. Free memory was 69.9MB in the beginning and 68.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:48:56,869 INFO L158 Benchmark]: RCFGBuilder took 424.34ms. Allocated memory is still 96.5MB. Free memory was 68.3MB in the beginning and 51.5MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-03 02:48:56,869 INFO L158 Benchmark]: TraceAbstraction took 511218.46ms. Allocated memory was 96.5MB in the beginning and 299.9MB in the end (delta: 203.4MB). Free memory was 50.9MB in the beginning and 156.5MB in the end (delta: -105.5MB). Peak memory consumption was 100.0MB. Max. memory is 16.1GB. [2022-11-03 02:48:56,871 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 96.5MB. Free memory was 68.7MB in the beginning and 68.6MB in the end (delta: 21.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 276.73ms. Allocated memory is still 96.5MB. Free memory was 61.8MB in the beginning and 71.4MB in the end (delta: -9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.88ms. Allocated memory is still 96.5MB. Free memory was 71.4MB in the beginning and 69.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 27.40ms. Allocated memory is still 96.5MB. Free memory was 69.9MB in the beginning and 68.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 424.34ms. Allocated memory is still 96.5MB. Free memory was 68.3MB in the beginning and 51.5MB in the end (delta: 16.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 511218.46ms. Allocated memory was 96.5MB in the beginning and 299.9MB in the end (delta: 203.4MB). Free memory was 50.9MB in the beginning and 156.5MB in the end (delta: -105.5MB). Peak memory consumption was 100.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@136b0bf9 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@136b0bf9: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/res2o.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:48:59,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:48:59,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:48:59,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:48:59,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:48:59,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:48:59,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:48:59,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:48:59,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:48:59,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:48:59,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:48:59,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:48:59,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:48:59,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:48:59,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:48:59,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:48:59,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:48:59,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:48:59,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:48:59,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:48:59,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:48:59,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:48:59,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:48:59,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:48:59,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:48:59,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:48:59,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:48:59,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:48:59,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:48:59,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:48:59,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:48:59,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:48:59,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:48:59,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:48:59,575 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:48:59,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:48:59,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:48:59,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:48:59,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:48:59,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:48:59,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:48:59,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:48:59,611 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:48:59,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:48:59,612 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:48:59,612 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:48:59,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:48:59,613 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:48:59,614 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:48:59,614 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:48:59,615 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:48:59,615 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:48:59,615 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:48:59,616 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:48:59,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:48:59,617 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:48:59,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:48:59,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:48:59,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:48:59,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:48:59,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:48:59,619 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:48:59,620 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:48:59,620 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:48:59,620 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:48:59,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:48:59,621 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:48:59,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:48:59,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:48:59,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:48:59,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:48:59,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:48:59,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:48:59,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:48:59,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:48:59,624 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:48:59,624 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:48:59,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:48:59,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:48:59,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:48:59,625 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8f420e2027982da4f1bb18a6387f830c2a1e2f24637d0451d3246965ba37a6d [2022-11-03 02:49:00,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:49:00,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:49:00,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:49:00,185 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:49:00,190 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:49:00,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/res2o.c [2022-11-03 02:49:00,292 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/data/58ed25755/4a124a852d134c669c3c2ddadc82b6ec/FLAG8336ff994 [2022-11-03 02:49:00,978 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:49:00,983 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/sv-benchmarks/c/array-fpi/res2o.c [2022-11-03 02:49:00,992 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/data/58ed25755/4a124a852d134c669c3c2ddadc82b6ec/FLAG8336ff994 [2022-11-03 02:49:01,312 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/data/58ed25755/4a124a852d134c669c3c2ddadc82b6ec [2022-11-03 02:49:01,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:49:01,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:49:01,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:49:01,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:49:01,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:49:01,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1022088a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01, skipping insertion in model container [2022-11-03 02:49:01,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:49:01,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:49:01,523 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2022-11-03 02:49:01,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:49:01,568 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:49:01,644 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/sv-benchmarks/c/array-fpi/res2o.c[588,601] [2022-11-03 02:49:01,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:49:01,680 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:49:01,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01 WrapperNode [2022-11-03 02:49:01,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:49:01,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:49:01,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:49:01,683 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:49:01,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,759 INFO L138 Inliner]: procedures = 21, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 112 [2022-11-03 02:49:01,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:49:01,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:49:01,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:49:01,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:49:01,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,800 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:49:01,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:49:01,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:49:01,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:49:01,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (1/1) ... [2022-11-03 02:49:01,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:49:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:01,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:49:01,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:49:01,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:49:01,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:49:01,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:49:01,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-03 02:49:01,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:49:01,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:49:01,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:49:01,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:49:01,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-03 02:49:01,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:49:01,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:49:02,090 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:49:02,093 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:49:02,493 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:49:02,500 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:49:02,501 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-03 02:49:02,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:02 BoogieIcfgContainer [2022-11-03 02:49:02,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:49:02,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:49:02,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:49:02,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:49:02,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:49:01" (1/3) ... [2022-11-03 02:49:02,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1fc33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:49:02, skipping insertion in model container [2022-11-03 02:49:02,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:01" (2/3) ... [2022-11-03 02:49:02,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1fc33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:49:02, skipping insertion in model container [2022-11-03 02:49:02,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:49:02" (3/3) ... [2022-11-03 02:49:02,527 INFO L112 eAbstractionObserver]: Analyzing ICFG res2o.c [2022-11-03 02:49:02,570 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:49:02,586 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:49:02,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:49:02,685 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;@54e1ca99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:49:02,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:49:02,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:49:02,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:02,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:02,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:02,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1780399656, now seen corresponding path program 1 times [2022-11-03 02:49:02,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:02,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121917942] [2022-11-03 02:49:02,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:02,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:02,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:02,741 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:02,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:49:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:02,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:49:02,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:02,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:02,979 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:02,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121917942] [2022-11-03 02:49:02,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121917942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:02,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:02,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:49:02,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298550437] [2022-11-03 02:49:02,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:02,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:49:02,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:03,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:49:03,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:49:03,045 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:03,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:03,077 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2022-11-03 02:49:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:49:03,080 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:49:03,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:03,093 INFO L225 Difference]: With dead ends: 56 [2022-11-03 02:49:03,093 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 02:49:03,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:49:03,113 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:03,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:49:03,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 02:49:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-03 02:49:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-03 02:49:03,161 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 19 [2022-11-03 02:49:03,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:03,161 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-03 02:49:03,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-03 02:49:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:49:03,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:03,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:03,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:03,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:03,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:03,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1279549768, now seen corresponding path program 1 times [2022-11-03 02:49:03,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:03,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532206811] [2022-11-03 02:49:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:03,383 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:03,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:03,388 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:03,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:49:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:03,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:49:03,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:03,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:03,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:49:03,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532206811] [2022-11-03 02:49:03,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532206811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:03,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:49:03,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:49:03,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304580172] [2022-11-03 02:49:03,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:03,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:49:03,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:49:03,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:49:03,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:49:03,803 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:04,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:04,184 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-11-03 02:49:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:49:04,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 02:49:04,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:04,186 INFO L225 Difference]: With dead ends: 57 [2022-11-03 02:49:04,187 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 02:49:04,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:04,189 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:04,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 12 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:49:04,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 02:49:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-11-03 02:49:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-11-03 02:49:04,202 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 19 [2022-11-03 02:49:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:04,203 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-11-03 02:49:04,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:49:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-11-03 02:49:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:49:04,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:04,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:04,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:04,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:49:04,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1740145276, now seen corresponding path program 1 times [2022-11-03 02:49:04,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:49:04,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134788564] [2022-11-03 02:49:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:04,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:49:04,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:49:04,424 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:49:04,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:49:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:04,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 02:49:04,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:05,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:49:05,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:05,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:49:05,117 INFO L356 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-03 02:49:05,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-11-03 02:49:05,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:05,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-03 02:49:07,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:07,138 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-03 02:49:07,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 44 [2022-11-03 02:49:08,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:08,238 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-03 02:49:08,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 42 treesize of output 54 [2022-11-03 02:49:09,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:09,593 INFO L356 Elim1Store]: treesize reduction 78, result has 30.4 percent of original size [2022-11-03 02:49:09,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 94 treesize of output 77 [2022-11-03 02:49:10,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:10,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:10,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 77 [2022-11-03 02:49:11,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:11,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:11,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:11,652 INFO L356 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2022-11-03 02:49:11,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 101 [2022-11-03 02:49:12,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:12,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:49:12,337 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:49:12,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 170 treesize of output 130 [2022-11-03 02:49:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:49:12,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:50:43,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:43,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:43,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:43,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:43,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:43,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:50:47,655 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:50:47,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134788564] [2022-11-03 02:50:47,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134788564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:50:47,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1066952728] [2022-11-03 02:50:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:47,656 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:50:47,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:50:47,662 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:50:47,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-03 02:50:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:48,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 02:50:48,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:49,711 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-03 02:50:49,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 74 [2022-11-03 02:50:49,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:49,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:49,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:50:50,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:50,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:50:50,958 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:50:50,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2022-11-03 02:50:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:55,693 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-03 02:50:55,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 44 [2022-11-03 02:50:59,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:50:59,608 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-03 02:50:59,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 42 treesize of output 54 [2022-11-03 02:51:04,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:04,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:04,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:04,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:04,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 65 [2022-11-03 02:51:07,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:07,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:07,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:07,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 77 [2022-11-03 02:51:11,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:11,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:11,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:11,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:11,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 101 [2022-11-03 02:51:12,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:12,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:12,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:51:12,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 126 [2022-11-03 02:51:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:12,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:16,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:16,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:16,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:16,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:16,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:16,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:16,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1066952728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:16,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348163269] [2022-11-03 02:51:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:16,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:16,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:16,109 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:16,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:51:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:16,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:51:16,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:16,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:16,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:51:16,406 INFO L356 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-03 02:51:16,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-11-03 02:51:17,209 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:51:17,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-03 02:51:19,806 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:51:19,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 02:51:21,466 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:51:21,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 52 [2022-11-03 02:51:23,035 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:51:23,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 67 [2022-11-03 02:51:25,199 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:51:25,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 81 [2022-11-03 02:51:28,048 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:51:28,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 109 [2022-11-03 02:51:29,597 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:51:29,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 142 [2022-11-03 02:51:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:29,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:51:33,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:33,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:33,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:33,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:33,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:33,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:51:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:51:33,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348163269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:51:33,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:51:33,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18, 18, 19, 19] total 65 [2022-11-03 02:51:33,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659177502] [2022-11-03 02:51:33,194 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:51:33,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-03 02:51:33,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:51:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-03 02:51:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=3454, Unknown=5, NotChecked=0, Total=4160 [2022-11-03 02:51:33,202 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 65 states, 65 states have (on average 1.7384615384615385) internal successors, (113), 65 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:51:42,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:43,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:12,929 WARN L234 SmtUtils]: Spent 6.65s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:52:14,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:15,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:16,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:19,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:47,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:49,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:50,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:54,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:22,117 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-11-03 02:53:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 02:53:22,118 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.7384615384615385) internal successors, (113), 65 states have internal predecessors, (113), 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 31 [2022-11-03 02:53:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:22,123 INFO L225 Difference]: With dead ends: 82 [2022-11-03 02:53:22,123 INFO L226 Difference]: Without dead ends: 76 [2022-11-03 02:53:22,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 205.0s TimeCoverageRelationStatistics Valid=814, Invalid=4425, Unknown=17, NotChecked=0, Total=5256 [2022-11-03 02:53:22,127 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:22,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 227 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 2 Unknown, 192 Unchecked, 29.1s Time] [2022-11-03 02:53:22,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-03 02:53:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2022-11-03 02:53:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-11-03 02:53:22,151 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 31 [2022-11-03 02:53:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:22,151 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-11-03 02:53:22,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.7384615384615385) internal successors, (113), 65 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-11-03 02:53:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:53:22,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:22,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:22,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-11-03 02:53:22,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:22,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:22,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:22,758 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:22,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1839245574, now seen corresponding path program 2 times [2022-11-03 02:53:22,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:22,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680698005] [2022-11-03 02:53:22,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:53:22,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:22,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:22,761 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:22,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:53:22,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:22,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:22,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:53:22,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:53:23,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:53:23,550 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:23,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680698005] [2022-11-03 02:53:23,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680698005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [895617466] [2022-11-03 02:53:23,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:53:23,551 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:23,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:23,556 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:23,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 02:53:23,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:23,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:23,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:53:23,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:53:24,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:53:24,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [895617466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:24,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15842095] [2022-11-03 02:53:24,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:53:24,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:24,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:24,082 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:24,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:53:24,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:53:24,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:24,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:53:24,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:53:24,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:53:24,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15842095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:24,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:53:24,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 8, 7] total 17 [2022-11-03 02:53:24,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046723567] [2022-11-03 02:53:24,575 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:24,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:53:24,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:24,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:53:24,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:53:24,577 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:25,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:25,974 INFO L93 Difference]: Finished difference Result 138 states and 167 transitions. [2022-11-03 02:53:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:53:25,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 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 33 [2022-11-03 02:53:25,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:25,976 INFO L225 Difference]: With dead ends: 138 [2022-11-03 02:53:25,976 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 02:53:25,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:53:25,978 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 140 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:25,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 36 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:53:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 02:53:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2022-11-03 02:53:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 63 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2022-11-03 02:53:25,995 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 33 [2022-11-03 02:53:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:25,995 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2022-11-03 02:53:25,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2022-11-03 02:53:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 02:53:25,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:25,997 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:26,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:26,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:26,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:26,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:26,602 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:26,603 INFO L85 PathProgramCache]: Analyzing trace with hash 447877832, now seen corresponding path program 3 times [2022-11-03 02:53:26,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:26,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232091474] [2022-11-03 02:53:26,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:53:26,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:26,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:26,605 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:26,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:53:26,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:53:26,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:26,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:53:26,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:53:27,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:53:27,696 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:53:27,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232091474] [2022-11-03 02:53:27,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232091474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:27,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [487750732] [2022-11-03 02:53:27,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:53:27,697 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:53:27,698 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:53:27,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:53:27,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:53:27,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:27,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:53:27,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:53:28,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:53:28,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [487750732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:28,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666940504] [2022-11-03 02:53:28,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:53:28,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:28,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:28,426 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:28,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:53:28,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:53:28,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:28,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:53:28,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:53:29,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:53:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:53:29,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666940504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:53:29,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:53:29,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 7, 8, 7] total 27 [2022-11-03 02:53:29,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765118331] [2022-11-03 02:53:29,125 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:53:29,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 02:53:29,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:53:29,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 02:53:29,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:53:29,128 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:31,014 INFO L93 Difference]: Finished difference Result 140 states and 171 transitions. [2022-11-03 02:53:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:53:31,015 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 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 35 [2022-11-03 02:53:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:31,016 INFO L225 Difference]: With dead ends: 140 [2022-11-03 02:53:31,017 INFO L226 Difference]: Without dead ends: 96 [2022-11-03 02:53:31,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=410, Invalid=1072, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:53:31,018 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 431 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:31,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 27 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:53:31,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-03 02:53:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2022-11-03 02:53:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-11-03 02:53:31,061 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 35 [2022-11-03 02:53:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:31,061 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-11-03 02:53:31,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:53:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-11-03 02:53:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 02:53:31,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:31,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:31,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:31,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:31,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:31,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:53:31,679 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:31,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:31,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1410382416, now seen corresponding path program 4 times [2022-11-03 02:53:31,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:53:31,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044901845] [2022-11-03 02:53:31,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:53:31,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:53:31,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:53:31,682 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:53:31,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ede12a3-1970-463e-a98b-b8efa1a2b080/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:53:32,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:53:32,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:53:32,196 WARN L261 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-03 02:53:32,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:32,308 INFO L356 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-03 02:53:32,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-11-03 02:53:32,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:32,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:32,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:53:32,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:32,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-03 02:53:33,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:33,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:33,596 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 02:53:33,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-03 02:53:34,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:34,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:34,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:34,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:34,980 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-03 02:53:34,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 48 treesize of output 60 [2022-11-03 02:53:35,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:35,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:35,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:35,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:35,875 INFO L356 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-03 02:53:35,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 53 treesize of output 64 [2022-11-03 02:53:37,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:37,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:37,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:37,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:37,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:37,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:37,072 INFO L356 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2022-11-03 02:53:37,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 82 [2022-11-03 02:53:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:38,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:38,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:38,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:38,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:38,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:38,144 INFO L356 Elim1Store]: treesize reduction 59, result has 13.2 percent of original size [2022-11-03 02:53:38,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 69 treesize of output 86 [2022-11-03 02:53:39,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:39,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:39,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:39,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:39,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:39,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:39,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:39,595 INFO L356 Elim1Store]: treesize reduction 190, result has 21.8 percent of original size [2022-11-03 02:53:39,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 5 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 129 treesize of output 105 [2022-11-03 02:53:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:40,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:40,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:40,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:40,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:40,729 INFO L356 Elim1Store]: treesize reduction 184, result has 20.3 percent of original size [2022-11-03 02:53:40,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 131 treesize of output 111 [2022-11-03 02:53:41,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:41,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:41,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:41,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:41,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:41,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:41,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:42,036 INFO L356 Elim1Store]: treesize reduction 188, result has 21.3 percent of original size [2022-11-03 02:53:42,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 5 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 171 treesize of output 139 [2022-11-03 02:53:43,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:43,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:43,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:43,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:43,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:43,106 INFO L356 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2022-11-03 02:53:43,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 225 treesize of output 181 [2022-11-03 02:53:44,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:44,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:44,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:44,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:44,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:44,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:44,395 INFO L356 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2022-11-03 02:53:44,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 305 treesize of output 281 [2022-11-03 02:53:45,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:45,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:45,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:45,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:53:45,379 INFO L356 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2022-11-03 02:53:45,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 487 treesize of output 467 [2022-11-03 02:53:46,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:46,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:53:46,317 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-03 02:53:46,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 863 treesize of output 811 [2022-11-03 02:53:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:53:46,479 INFO L328 TraceCheckSpWp]: Computing backward predicates...