./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba --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 61ee7f467544bc9f9ea1f0d9fd399b9972cb81a4a1640bca414247c42e8cc99d --- 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-b5237d8 [2022-11-22 02:21:40,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:21:40,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:21:40,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:21:40,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:21:40,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:21:40,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:21:40,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:21:40,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:21:40,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:21:40,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:21:40,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:21:40,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:21:40,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:21:40,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:21:40,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:21:40,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:21:40,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:21:40,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:21:40,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:21:40,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:21:40,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:21:40,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:21:40,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:21:40,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:21:40,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:21:40,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:21:40,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:21:40,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:21:40,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:21:40,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:21:40,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:21:40,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:21:40,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:21:40,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:21:40,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:21:40,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:21:40,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:21:40,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:21:40,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:21:40,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:21:40,381 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:21:40,412 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:21:40,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:21:40,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:21:40,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:21:40,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:21:40,414 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:21:40,414 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:21:40,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:21:40,415 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:21:40,419 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:21:40,420 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:21:40,421 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:21:40,421 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:21:40,421 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:21:40,421 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:21:40,422 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:21:40,422 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:21:40,422 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:21:40,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:21:40,423 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:21:40,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:21:40,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:21:40,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:21:40,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:21:40,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:21:40,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:21:40,426 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:21:40,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:21:40,426 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:21:40,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:21:40,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:21:40,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:21:40,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:21:40,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:21:40,428 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:21:40,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:21:40,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:21:40,428 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:21:40,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:21:40,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:21:40,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:21:40,429 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_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61ee7f467544bc9f9ea1f0d9fd399b9972cb81a4a1640bca414247c42e8cc99d [2022-11-22 02:21:40,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:21:40,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:21:40,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:21:40,802 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:21:40,803 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:21:40,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2022-11-22 02:21:44,138 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:21:44,422 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:21:44,423 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2022-11-22 02:21:44,429 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/data/22ef1a09a/a7d35fabf5114802a202e60ac40e961d/FLAG9bf66244b [2022-11-22 02:21:44,445 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/data/22ef1a09a/a7d35fabf5114802a202e60ac40e961d [2022-11-22 02:21:44,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:21:44,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:21:44,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:21:44,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:21:44,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:21:44,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:21:44" (1/1) ... [2022-11-22 02:21:44,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@410f2a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44, skipping insertion in model container [2022-11-22 02:21:44,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:21:44" (1/1) ... [2022-11-22 02:21:44,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:21:44,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:21:44,639 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c[415,428] [2022-11-22 02:21:44,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:21:44,667 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:21:44,680 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c[415,428] [2022-11-22 02:21:44,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:21:44,701 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:21:44,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44 WrapperNode [2022-11-22 02:21:44,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:21:44,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:21:44,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:21:44,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:21:44,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44" (1/1) ... [2022-11-22 02:21:44,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44" (1/1) ... [2022-11-22 02:21:44,749 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-11-22 02:21:44,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:21:44,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:21:44,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:21:44,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:21:44,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44" (1/1) ... [2022-11-22 02:21:44,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44" (1/1) ... [2022-11-22 02:21:44,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44" (1/1) ... [2022-11-22 02:21:44,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44" (1/1) ... [2022-11-22 02:21:44,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44" (1/1) ... [2022-11-22 02:21:44,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44" (1/1) ... [2022-11-22 02:21:44,798 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44" (1/1) ... [2022-11-22 02:21:44,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44" (1/1) ... [2022-11-22 02:21:44,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:21:44,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:21:44,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:21:44,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:21:44,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44" (1/1) ... [2022-11-22 02:21:44,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:21:44,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:44,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:21:44,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:21:44,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:21:44,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:21:44,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:21:44,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:21:44,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:21:44,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:21:44,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:21:44,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:21:45,015 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:21:45,019 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:21:45,222 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:21:45,275 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:21:45,275 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 02:21:45,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:21:45 BoogieIcfgContainer [2022-11-22 02:21:45,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:21:45,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:21:45,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:21:45,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:21:45,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:21:44" (1/3) ... [2022-11-22 02:21:45,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c160fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:21:45, skipping insertion in model container [2022-11-22 02:21:45,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:21:44" (2/3) ... [2022-11-22 02:21:45,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c160fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:21:45, skipping insertion in model container [2022-11-22 02:21:45,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:21:45" (3/3) ... [2022-11-22 02:21:45,294 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind2.c [2022-11-22 02:21:45,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:21:45,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:21:45,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:21:45,404 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;@178f6369, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:21:45,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:21:45,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:45,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:21:45,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:45,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:21:45,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:21:45,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:45,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1868223123, now seen corresponding path program 1 times [2022-11-22 02:21:45,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:45,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157155913] [2022-11-22 02:21:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:45,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:45,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:45,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157155913] [2022-11-22 02:21:45,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157155913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:45,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:45,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:21:45,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618983602] [2022-11-22 02:21:45,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:45,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:21:45,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:45,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:21:45,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:21:45,842 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:45,903 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-11-22 02:21:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:21:45,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 02:21:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:45,916 INFO L225 Difference]: With dead ends: 26 [2022-11-22 02:21:45,916 INFO L226 Difference]: Without dead ends: 17 [2022-11-22 02:21:45,919 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 [2022-11-22 02:21:45,923 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:45,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:21:45,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-22 02:21:45,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2022-11-22 02:21:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:45,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-22 02:21:45,976 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-22 02:21:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:45,976 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-22 02:21:45,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-22 02:21:45,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:21:45,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:45,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:45,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:21:45,979 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:21:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash 947313280, now seen corresponding path program 1 times [2022-11-22 02:21:45,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:45,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862531275] [2022-11-22 02:21:45,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:45,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:46,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:46,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862531275] [2022-11-22 02:21:46,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862531275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:21:46,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:21:46,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:21:46,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506672856] [2022-11-22 02:21:46,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:21:46,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:21:46,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:46,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:21:46,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:21:46,117 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:46,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:46,167 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2022-11-22 02:21:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:21:46,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 02:21:46,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:46,173 INFO L225 Difference]: With dead ends: 18 [2022-11-22 02:21:46,174 INFO L226 Difference]: Without dead ends: 11 [2022-11-22 02:21:46,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:21:46,176 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:46,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 15 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:21:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-22 02:21:46,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-22 02:21:46,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-22 02:21:46,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-11-22 02:21:46,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:46,191 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-22 02:21:46,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-22 02:21:46,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:21:46,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:46,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:46,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:21:46,193 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:21:46,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:46,194 INFO L85 PathProgramCache]: Analyzing trace with hash 362824998, now seen corresponding path program 1 times [2022-11-22 02:21:46,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:46,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952313247] [2022-11-22 02:21:46,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:46,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:46,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:46,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952313247] [2022-11-22 02:21:46,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952313247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:46,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594725483] [2022-11-22 02:21:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:46,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:46,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:46,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:46,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:21:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:46,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:21:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:46,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:46,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594725483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:46,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [214220179] [2022-11-22 02:21:46,714 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 02:21:46,714 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:46,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:46,725 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:46,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:46,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:46,845 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-22 02:21:46,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-22 02:21:46,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:46,902 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:21:46,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:21:46,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:46,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-22 02:21:47,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:47,155 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-22 02:21:47,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 263 treesize of output 259 [2022-11-22 02:21:47,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-22 02:21:47,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-22 02:21:47,533 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:21:48,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~l~0#1| 1) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~k~0#1| 0) (<= ~N~0 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 100000 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= (ite (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~l~0#1| 4)))) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-22 02:21:48,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:21:48,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:21:48,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-22 02:21:48,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417788397] [2022-11-22 02:21:48,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:21:48,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:21:48,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:48,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:21:48,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:21:48,164 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:48,272 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-11-22 02:21:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:21:48,273 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 02:21:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:48,274 INFO L225 Difference]: With dead ends: 36 [2022-11-22 02:21:48,274 INFO L226 Difference]: Without dead ends: 28 [2022-11-22 02:21:48,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:21:48,280 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:48,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 29 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:21:48,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-22 02:21:48,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2022-11-22 02:21:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2022-11-22 02:21:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-22 02:21:48,290 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2022-11-22 02:21:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:48,291 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-22 02:21:48,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-22 02:21:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 02:21:48,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:48,292 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:48,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 02:21:48,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:48,493 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:21:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:48,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1925995406, now seen corresponding path program 1 times [2022-11-22 02:21:48,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:48,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594496310] [2022-11-22 02:21:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:48,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:48,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:48,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594496310] [2022-11-22 02:21:48,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594496310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:48,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210306023] [2022-11-22 02:21:48,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:48,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:48,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:48,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:48,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:21:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:48,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:21:48,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:49,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:21:49,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:21:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:49,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:49,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-11-22 02:21:49,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-22 02:21:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:49,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210306023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:49,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [121453999] [2022-11-22 02:21:49,260 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 02:21:49,260 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:49,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:49,260 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:49,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:49,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:49,305 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-22 02:21:49,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-22 02:21:49,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:49,359 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:21:49,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:21:49,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:49,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 02:21:49,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:49,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:49,550 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-22 02:21:49,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 254 treesize of output 256 [2022-11-22 02:21:49,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-22 02:21:49,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-22 02:21:49,704 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:21:50,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '306#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~l~0#1| 1) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< |ULTIMATE.start_main_~l~0#1| |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_~x~0#1| 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (ite (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~l~0#1| 4)))) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-22 02:21:50,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:21:50,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:21:50,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-11-22 02:21:50,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855158729] [2022-11-22 02:21:50,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:21:50,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:21:50,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:50,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:21:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-11-22 02:21:50,374 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-11-22 02:21:50,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:50,578 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-11-22 02:21:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:21:50,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 02:21:50,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:50,579 INFO L225 Difference]: With dead ends: 29 [2022-11-22 02:21:50,579 INFO L226 Difference]: Without dead ends: 27 [2022-11-22 02:21:50,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:21:50,581 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:50,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 65 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:21:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-22 02:21:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-11-22 02:21:50,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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) [2022-11-22 02:21:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-22 02:21:50,586 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2022-11-22 02:21:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:50,587 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-22 02:21:50,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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) [2022-11-22 02:21:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-22 02:21:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:21:50,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:50,588 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:50,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 02:21:50,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:50,793 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:21:50,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:50,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1306013557, now seen corresponding path program 2 times [2022-11-22 02:21:50,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:50,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027756711] [2022-11-22 02:21:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:50,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:51,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:51,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027756711] [2022-11-22 02:21:51,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027756711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:51,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454136051] [2022-11-22 02:21:51,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:21:51,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:51,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:51,151 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:51,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:21:51,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:21:51,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:21:51,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 02:21:51,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:51,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:21:51,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:51,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-22 02:21:51,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:21:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:51,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:51,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-22 02:21:51,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2022-11-22 02:21:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:51,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454136051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:51,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458922524] [2022-11-22 02:21:51,742 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-22 02:21:51,743 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:51,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:51,743 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:51,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:51,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:51,781 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-22 02:21:51,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-22 02:21:51,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:51,827 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:21:51,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:21:51,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:51,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-22 02:21:51,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:51,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:51,974 INFO L321 Elim1Store]: treesize reduction 74, result has 30.8 percent of original size [2022-11-22 02:21:51,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 280 [2022-11-22 02:21:52,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-22 02:21:52,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-22 02:21:52,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:21:52,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '476#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~l~0#1| 1) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (< |ULTIMATE.start_main_~l~0#1| |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start_main_~k~0#1| 0) (not (= |ULTIMATE.start_main_~x~0#1| 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (ite (<= |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~l~0#1| 4)))) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-22 02:21:52,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:21:52,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:21:52,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-11-22 02:21:52,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616358336] [2022-11-22 02:21:52,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:21:52,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 02:21:52,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:52,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 02:21:52,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:21:52,875 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:53,456 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-11-22 02:21:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:21:53,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 02:21:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:53,457 INFO L225 Difference]: With dead ends: 32 [2022-11-22 02:21:53,457 INFO L226 Difference]: Without dead ends: 30 [2022-11-22 02:21:53,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:21:53,458 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 55 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:53,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 84 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:21:53,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-22 02:21:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2022-11-22 02:21:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2022-11-22 02:21:53,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-22 02:21:53,467 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2022-11-22 02:21:53,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:53,467 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-22 02:21:53,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:53,468 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-22 02:21:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:21:53,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:53,470 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:53,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:21:53,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:53,671 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:21:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash 866156038, now seen corresponding path program 1 times [2022-11-22 02:21:53,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:53,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645082019] [2022-11-22 02:21:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:53,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:53,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:53,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645082019] [2022-11-22 02:21:53,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645082019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:53,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885990433] [2022-11-22 02:21:53,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:53,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:53,782 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:53,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:21:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:21:53,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:53,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:53,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885990433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:53,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [619706077] [2022-11-22 02:21:53,964 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:21:53,964 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:53,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:53,965 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:53,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:53,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:54,008 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-22 02:21:54,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-22 02:21:54,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:54,061 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:21:54,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:21:54,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:54,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-22 02:21:54,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:54,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:54,181 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-22 02:21:54,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 269 treesize of output 265 [2022-11-22 02:21:54,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-22 02:21:54,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-22 02:21:54,446 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:21:55,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '663#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_main_~l~0#1|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-22 02:21:55,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:21:55,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:21:55,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-22 02:21:55,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777441520] [2022-11-22 02:21:55,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:21:55,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 02:21:55,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 02:21:55,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:21:55,248 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:55,287 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-11-22 02:21:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:21:55,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-22 02:21:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:55,289 INFO L225 Difference]: With dead ends: 28 [2022-11-22 02:21:55,289 INFO L226 Difference]: Without dead ends: 18 [2022-11-22 02:21:55,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:21:55,290 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:55,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:21:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-22 02:21:55,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-22 02:21:55,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-11-22 02:21:55,295 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2022-11-22 02:21:55,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:55,295 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-11-22 02:21:55,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:55,296 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-11-22 02:21:55,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 02:21:55,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:55,296 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:55,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-22 02:21:55,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 02:21:55,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:21:55,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:55,502 INFO L85 PathProgramCache]: Analyzing trace with hash -653734721, now seen corresponding path program 2 times [2022-11-22 02:21:55,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:55,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167706133] [2022-11-22 02:21:55,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:55,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:55,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:55,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167706133] [2022-11-22 02:21:55,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167706133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:55,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504682443] [2022-11-22 02:21:55,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:21:55,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:55,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:55,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:55,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:21:56,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:21:56,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:21:56,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-22 02:21:56,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:56,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:21:56,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:21:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:56,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:56,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-11-22 02:21:56,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-22 02:21:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:56,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504682443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:56,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [749701288] [2022-11-22 02:21:56,745 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:21:56,745 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:56,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:56,745 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:56,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:56,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:56,783 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-22 02:21:56,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-22 02:21:56,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:56,826 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:21:56,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:21:56,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:56,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-22 02:21:56,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:56,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:56,972 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-22 02:21:56,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 269 treesize of output 265 [2022-11-22 02:21:57,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-22 02:21:57,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-22 02:21:57,226 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:21:58,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '847#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start_main_~k~0#1| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_main_~l~0#1|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-22 02:21:58,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:21:58,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:21:58,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-11-22 02:21:58,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391383437] [2022-11-22 02:21:58,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:21:58,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:21:58,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:21:58,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:21:58,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:21:58,157 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:58,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:58,866 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-22 02:21:58,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:21:58,867 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-22 02:21:58,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:58,868 INFO L225 Difference]: With dead ends: 37 [2022-11-22 02:21:58,868 INFO L226 Difference]: Without dead ends: 35 [2022-11-22 02:21:58,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 02:21:58,870 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:58,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 79 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:21:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-22 02:21:58,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2022-11-22 02:21:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-22 02:21:58,878 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 16 [2022-11-22 02:21:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:58,879 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-22 02:21:58,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-22 02:21:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 02:21:58,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:58,880 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:58,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:21:59,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 02:21:59,083 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:21:59,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:59,084 INFO L85 PathProgramCache]: Analyzing trace with hash -802103325, now seen corresponding path program 1 times [2022-11-22 02:21:59,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:21:59,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856515694] [2022-11-22 02:21:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:59,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:21:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:21:59,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:21:59,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856515694] [2022-11-22 02:21:59,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856515694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:59,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739313989] [2022-11-22 02:21:59,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:59,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:59,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:59,171 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:59,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:21:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:59,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:21:59,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:21:59,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:21:59,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739313989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:59,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300064298] [2022-11-22 02:21:59,388 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 02:21:59,388 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:21:59,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:21:59,389 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:21:59,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:21:59,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:59,436 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 02:21:59,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 02:21:59,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:59,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:21:59,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:59,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-22 02:21:59,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:59,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:21:59,569 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-22 02:21:59,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 254 treesize of output 256 [2022-11-22 02:21:59,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-22 02:21:59,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-22 02:21:59,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:22:00,560 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1077#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 99999 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (+ 99999 |ULTIMATE.start_main_~k~0#1|) 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_main_~l~0#1|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-22 02:22:00,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:22:00,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:22:00,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-22 02:22:00,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824846570] [2022-11-22 02:22:00,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:22:00,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:22:00,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:22:00,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:22:00,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:22:00,562 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:22:00,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:22:00,676 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2022-11-22 02:22:00,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:22:00,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-22 02:22:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:22:00,684 INFO L225 Difference]: With dead ends: 100 [2022-11-22 02:22:00,684 INFO L226 Difference]: Without dead ends: 92 [2022-11-22 02:22:00,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:22:00,686 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 123 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:22:00,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 65 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:22:00,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-22 02:22:00,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 37. [2022-11-22 02:22:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:22:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-22 02:22:00,705 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 17 [2022-11-22 02:22:00,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:22:00,705 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-22 02:22:00,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:22:00,706 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-22 02:22:00,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 02:22:00,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:00,707 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:22:00,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-22 02:22:00,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 02:22:00,913 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:22:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:22:00,913 INFO L85 PathProgramCache]: Analyzing trace with hash -979873480, now seen corresponding path program 3 times [2022-11-22 02:22:00,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:22:00,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880251932] [2022-11-22 02:22:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:00,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:22:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:22:01,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:22:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880251932] [2022-11-22 02:22:01,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880251932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:22:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901495985] [2022-11-22 02:22:01,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:22:01,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:01,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:22:01,296 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:22:01,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b5be22-6b13-41db-9fcc-21253af3ee8c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:22:01,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:22:01,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:22:01,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-22 02:22:01,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:22:01,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:22:01,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-22 02:22:01,495 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-22 02:22:01,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-11-22 02:22:01,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:22:01,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2022-11-22 02:22:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:22:01,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:22:06,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2022-11-22 02:22:06,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:22:06,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70098 treesize of output 66002