./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/pcompf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/pcompf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9 --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 f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 --- 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-6b4ec56 [2022-11-20 21:24:49,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:24:49,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:24:49,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:24:49,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:24:49,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:24:49,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:24:49,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:24:49,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:24:49,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:24:49,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:24:49,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:24:49,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:24:49,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:24:49,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:24:49,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:24:49,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:24:49,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:24:49,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:24:49,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:24:49,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:24:49,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:24:49,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:24:49,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:24:49,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:24:49,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:24:49,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:24:49,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:24:49,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:24:49,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:24:49,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:24:49,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:24:49,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:24:49,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:24:49,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:24:49,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:24:49,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:24:49,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:24:49,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:24:49,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:24:49,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:24:49,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:24:49,507 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:24:49,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:24:49,508 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:24:49,508 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:24:49,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:24:49,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:24:49,510 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:24:49,510 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:24:49,510 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:24:49,510 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:24:49,511 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:24:49,511 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:24:49,511 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:24:49,511 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:24:49,512 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:24:49,512 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:24:49,512 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:24:49,512 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:24:49,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:24:49,513 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:24:49,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:24:49,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:24:49,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:24:49,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:24:49,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:24:49,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:24:49,515 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:24:49,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:24:49,516 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:24:49,516 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:24:49,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:24:49,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:24:49,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:24:49,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:24:49,517 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:24:49,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:24:49,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:24:49,518 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:24:49,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:24:49,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:24:49,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:24:49,519 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_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f995d1a14a0e61f10b2f5817b1ff2bf8d1511dbe7297ad48450a11ed6f3a9160 [2022-11-20 21:24:49,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:24:49,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:24:49,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:24:49,801 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:24:49,802 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:24:49,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/array-fpi/pcompf.c [2022-11-20 21:24:52,854 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:24:53,084 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:24:53,085 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/sv-benchmarks/c/array-fpi/pcompf.c [2022-11-20 21:24:53,091 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/data/654b7e405/224b82abb64848c29f626e69a3ba4850/FLAGf8146c294 [2022-11-20 21:24:53,107 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/data/654b7e405/224b82abb64848c29f626e69a3ba4850 [2022-11-20 21:24:53,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:24:53,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:24:53,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:24:53,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:24:53,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:24:53,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:24:53" (1/1) ... [2022-11-20 21:24:53,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d55859d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53, skipping insertion in model container [2022-11-20 21:24:53,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:24:53" (1/1) ... [2022-11-20 21:24:53,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:24:53,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:24:53,275 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_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2022-11-20 21:24:53,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:24:53,308 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:24:53,320 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/sv-benchmarks/c/array-fpi/pcompf.c[589,602] [2022-11-20 21:24:53,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:24:53,344 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:24:53,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53 WrapperNode [2022-11-20 21:24:53,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:24:53,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:24:53,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:24:53,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:24:53,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53" (1/1) ... [2022-11-20 21:24:53,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53" (1/1) ... [2022-11-20 21:24:53,377 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2022-11-20 21:24:53,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:24:53,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:24:53,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:24:53,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:24:53,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53" (1/1) ... [2022-11-20 21:24:53,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53" (1/1) ... [2022-11-20 21:24:53,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53" (1/1) ... [2022-11-20 21:24:53,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53" (1/1) ... [2022-11-20 21:24:53,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53" (1/1) ... [2022-11-20 21:24:53,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53" (1/1) ... [2022-11-20 21:24:53,402 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53" (1/1) ... [2022-11-20 21:24:53,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53" (1/1) ... [2022-11-20 21:24:53,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:24:53,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:24:53,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:24:53,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:24:53,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53" (1/1) ... [2022-11-20 21:24:53,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:24:53,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:53,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:24:53,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:24:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:24:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:24:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 21:24:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 21:24:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:24:53,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:24:53,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 21:24:53,559 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:24:53,561 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:24:53,754 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:24:53,805 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:24:53,806 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 21:24:53,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:24:53 BoogieIcfgContainer [2022-11-20 21:24:53,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:24:53,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:24:53,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:24:53,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:24:53,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:24:53" (1/3) ... [2022-11-20 21:24:53,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21394356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:24:53, skipping insertion in model container [2022-11-20 21:24:53,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:24:53" (2/3) ... [2022-11-20 21:24:53,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21394356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:24:53, skipping insertion in model container [2022-11-20 21:24:53,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:24:53" (3/3) ... [2022-11-20 21:24:53,839 INFO L112 eAbstractionObserver]: Analyzing ICFG pcompf.c [2022-11-20 21:24:53,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:24:53,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:24:53,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:24:53,996 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;@5ef96852, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:24:54,004 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:24:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:24:54,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:54,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:54,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:54,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:54,036 INFO L85 PathProgramCache]: Analyzing trace with hash 697271499, now seen corresponding path program 1 times [2022-11-20 21:24:54,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:54,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147211362] [2022-11-20 21:24:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:54,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:54,187 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:24:54,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298046341] [2022-11-20 21:24:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:54,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:54,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:54,192 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:54,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:24:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:54,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:24:54,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:54,682 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-11-20 21:24:54,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2022-11-20 21:24:54,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-20 21:24:54,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-20 21:24:54,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-20 21:24:55,265 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 5 treesize of output 3 [2022-11-20 21:24:55,488 INFO L321 Elim1Store]: treesize reduction 86, result has 16.5 percent of original size [2022-11-20 21:24:55,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 102 treesize of output 105 [2022-11-20 21:24:55,507 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 5 treesize of output 3 [2022-11-20 21:24:55,559 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 5 treesize of output 3 [2022-11-20 21:24:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:55,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:24:55,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:55,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147211362] [2022-11-20 21:24:55,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:24:55,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298046341] [2022-11-20 21:24:55,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298046341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:24:55,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:24:55,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:24:55,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933648812] [2022-11-20 21:24:55,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:24:55,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:24:55,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:55,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:24:55,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:24:55,687 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:55,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:55,827 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-11-20 21:24:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:24:55,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:24:55,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:55,838 INFO L225 Difference]: With dead ends: 37 [2022-11-20 21:24:55,838 INFO L226 Difference]: Without dead ends: 22 [2022-11-20 21:24:55,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:24:55,853 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:55,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 19 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:24:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-20 21:24:55,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2022-11-20 21:24:55,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 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) [2022-11-20 21:24:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2022-11-20 21:24:55,911 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 8 [2022-11-20 21:24:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:55,912 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 21 transitions. [2022-11-20 21:24:55,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:55,912 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2022-11-20 21:24:55,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:24:55,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:55,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:55,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:56,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 21:24:56,119 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:56,121 INFO L85 PathProgramCache]: Analyzing trace with hash 131371694, now seen corresponding path program 1 times [2022-11-20 21:24:56,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:56,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145904873] [2022-11-20 21:24:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:56,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:56,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:24:56,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028817251] [2022-11-20 21:24:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:56,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:56,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:56,190 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:56,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:24:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:56,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:24:56,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:56,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:24:56,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:56,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145904873] [2022-11-20 21:24:56,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:24:56,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028817251] [2022-11-20 21:24:56,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028817251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:24:56,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:24:56,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:24:56,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369968459] [2022-11-20 21:24:56,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:24:56,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:24:56,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:56,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:24:56,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:24:56,303 INFO L87 Difference]: Start difference. First operand 15 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:56,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:56,372 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-11-20 21:24:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:24:56,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:24:56,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:56,374 INFO L225 Difference]: With dead ends: 36 [2022-11-20 21:24:56,374 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 21:24:56,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:24:56,376 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:56,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:24:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 21:24:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2022-11-20 21:24:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-20 21:24:56,390 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2022-11-20 21:24:56,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:56,390 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-20 21:24:56,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-20 21:24:56,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:24:56,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:56,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:56,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 21:24:56,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-20 21:24:56,598 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:56,599 INFO L85 PathProgramCache]: Analyzing trace with hash -197136011, now seen corresponding path program 1 times [2022-11-20 21:24:56,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:56,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113737862] [2022-11-20 21:24:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:56,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:56,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:24:56,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106914667] [2022-11-20 21:24:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:56,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:56,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:56,629 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:56,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:24:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:56,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:24:56,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:56,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:56,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:56,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113737862] [2022-11-20 21:24:56,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:24:56,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106914667] [2022-11-20 21:24:56,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106914667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:56,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [157648699] [2022-11-20 21:24:56,796 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:24:56,796 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:56,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:56,808 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:56,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:57,078 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-20 21:24:57,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-20 21:24:57,201 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:24:57,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-20 21:24:57,454 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-20 21:24:57,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-20 21:24:57,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:24:57,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:24:57,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-20 21:24:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:24:57,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:24:57,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:24:57,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:24:57,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:24:57,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:24:57,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:24:57,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:24:57,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:24:57,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:24:57,869 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-20 21:24:57,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-20 21:24:58,022 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 27 treesize of output 27 [2022-11-20 21:24:58,073 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:24:58,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '288#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= ~N~0 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:24:58,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:24:58,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:24:58,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-20 21:24:58,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296954754] [2022-11-20 21:24:58,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:24:58,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:24:58,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:58,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:24:58,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-20 21:24:58,469 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:58,572 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-11-20 21:24:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:24:58,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:24:58,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:58,573 INFO L225 Difference]: With dead ends: 33 [2022-11-20 21:24:58,574 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 21:24:58,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:24:58,575 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:58,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:24:58,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 21:24:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-11-20 21:24:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-20 21:24:58,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2022-11-20 21:24:58,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:58,593 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-20 21:24:58,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-20 21:24:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:24:58,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:58,596 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:58,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 21:24:58,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:58,802 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:58,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:58,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1958511373, now seen corresponding path program 1 times [2022-11-20 21:24:58,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:58,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672707984] [2022-11-20 21:24:58,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:58,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:58,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:24:58,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753232489] [2022-11-20 21:24:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:58,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:58,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:58,829 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:58,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 21:24:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:58,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:24:58,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:58,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:24:58,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:58,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672707984] [2022-11-20 21:24:58,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:24:58,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753232489] [2022-11-20 21:24:58,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753232489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:24:58,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:24:58,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 21:24:58,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417493312] [2022-11-20 21:24:58,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:24:58,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:24:58,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:24:58,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:24:58,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:24:58,953 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:59,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:24:59,025 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-20 21:24:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:24:59,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:24:59,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:24:59,026 INFO L225 Difference]: With dead ends: 29 [2022-11-20 21:24:59,026 INFO L226 Difference]: Without dead ends: 18 [2022-11-20 21:24:59,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:24:59,028 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:24:59,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:24:59,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-20 21:24:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2022-11-20 21:24:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-20 21:24:59,032 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 11 [2022-11-20 21:24:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:24:59,033 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-20 21:24:59,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:24:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-20 21:24:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:24:59,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:24:59,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:24:59,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:24:59,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:59,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:24:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:24:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1012980313, now seen corresponding path program 1 times [2022-11-20 21:24:59,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:24:59,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344272812] [2022-11-20 21:24:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:59,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:24:59,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:24:59,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914916260] [2022-11-20 21:24:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:24:59,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:24:59,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:24:59,268 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:24:59,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:24:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:24:59,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 21:24:59,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:24:59,377 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 14 treesize of output 12 [2022-11-20 21:24:59,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:24:59,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:24:59,399 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 21:24:59,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-20 21:24:59,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-20 21:24:59,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:24:59,456 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 14 treesize of output 16 [2022-11-20 21:24:59,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:24:59,493 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 21 treesize of output 20 [2022-11-20 21:24:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:24:59,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:24:59,623 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_267 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_267) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) is different from false [2022-11-20 21:24:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-20 21:24:59,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:24:59,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344272812] [2022-11-20 21:24:59,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:24:59,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914916260] [2022-11-20 21:24:59,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914916260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:24:59,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695177807] [2022-11-20 21:24:59,692 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:24:59,692 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:24:59,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:24:59,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:24:59,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:24:59,946 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-20 21:24:59,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-20 21:25:00,081 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:25:00,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-20 21:25:00,362 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-20 21:25:00,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-20 21:25:00,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:00,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-20 21:25:00,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:00,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:00,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:00,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,621 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-20 21:25:00,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-20 21:25:00,760 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 27 treesize of output 27 [2022-11-20 21:25:00,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,783 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:00,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-20 21:25:00,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:00,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:00,860 INFO L321 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-20 21:25:00,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 115 [2022-11-20 21:25:00,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:00,915 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:00,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:00,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,937 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:00,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-20 21:25:00,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:00,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:00,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:01,010 INFO L321 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-20 21:25:01,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 115 [2022-11-20 21:25:01,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:01,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:01,076 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:01,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:01,125 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:25:01,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:25:01,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:25:01,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:25:01,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-20 21:25:01,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21408708] [2022-11-20 21:25:01,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:01,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 21:25:01,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:25:01,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 21:25:01,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=251, Unknown=5, NotChecked=32, Total=342 [2022-11-20 21:25:01,621 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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) [2022-11-20 21:25:01,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:01,796 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-20 21:25:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:25:01,797 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:25:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:01,798 INFO L225 Difference]: With dead ends: 26 [2022-11-20 21:25:01,798 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 21:25:01,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=400, Unknown=6, NotChecked=42, Total=552 [2022-11-20 21:25:01,799 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:01,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 25 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-11-20 21:25:01,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 21:25:01,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2022-11-20 21:25:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-20 21:25:01,804 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2022-11-20 21:25:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:01,804 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-20 21:25:01,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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) [2022-11-20 21:25:01,805 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-20 21:25:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:25:01,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:01,806 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:01,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-20 21:25:02,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:02,014 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:25:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:02,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1328410336, now seen corresponding path program 2 times [2022-11-20 21:25:02,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:25:02,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86858594] [2022-11-20 21:25:02,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:02,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:25:02,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:25:02,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330433540] [2022-11-20 21:25:02,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:25:02,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:02,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:02,062 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:02,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:25:02,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:25:02,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:25:02,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:25:02,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:25:02,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:25:02,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:25:02,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86858594] [2022-11-20 21:25:02,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:25:02,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330433540] [2022-11-20 21:25:02,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330433540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:02,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [931682180] [2022-11-20 21:25:02,270 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:25:02,270 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:25:02,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:25:02,271 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:25:02,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:25:02,369 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:25:02,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-20 21:25:02,633 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-20 21:25:02,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-20 21:25:02,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-20 21:25:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:02,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2022-11-20 21:25:02,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:02,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:02,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:02,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:02,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:02,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:02,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:02,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:02,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:02,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:02,907 INFO L321 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2022-11-20 21:25:02,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 492 treesize of output 489 [2022-11-20 21:25:03,112 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 27 treesize of output 27 [2022-11-20 21:25:03,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:03,130 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:03,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-20 21:25:03,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:03,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:03,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:03,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:03,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:03,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:03,226 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-20 21:25:03,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-20 21:25:03,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:03,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:03,272 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:03,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:03,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:03,304 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:03,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-20 21:25:03,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:03,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:03,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:03,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:03,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:03,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:03,383 INFO L321 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-20 21:25:03,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 115 [2022-11-20 21:25:03,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:03,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:03,445 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:03,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:03,492 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:25:03,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '705#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:25:03,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:25:03,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:25:03,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-20 21:25:03,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547545758] [2022-11-20 21:25:03,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:03,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 21:25:03,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:25:03,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 21:25:03,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:25:03,951 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:04,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:04,065 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-11-20 21:25:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:25:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:25:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:04,067 INFO L225 Difference]: With dead ends: 48 [2022-11-20 21:25:04,067 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 21:25:04,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-20 21:25:04,068 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:04,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 18 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:25:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 21:25:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2022-11-20 21:25:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-11-20 21:25:04,074 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2022-11-20 21:25:04,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:04,074 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-11-20 21:25:04,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:04,075 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-11-20 21:25:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:25:04,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:04,075 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:04,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:04,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:04,282 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:25:04,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:04,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1261411007, now seen corresponding path program 1 times [2022-11-20 21:25:04,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:25:04,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812269419] [2022-11-20 21:25:04,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:04,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:25:04,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:25:04,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528742306] [2022-11-20 21:25:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:04,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:04,311 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:04,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 21:25:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:04,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 21:25:04,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:05,061 INFO L321 Elim1Store]: treesize reduction 252, result has 37.8 percent of original size [2022-11-20 21:25:05,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 226 treesize of output 790 [2022-11-20 21:25:05,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-20 21:25:05,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-20 21:25:05,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-20 21:25:05,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-20 21:25:05,564 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 5 treesize of output 3 [2022-11-20 21:25:10,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2806 treesize of output 2736 [2022-11-20 21:25:11,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:11,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 3 [2022-11-20 21:25:11,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:11,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 3 [2022-11-20 21:25:11,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:11,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 3 [2022-11-20 21:25:12,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:12,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:12,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:12,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:12,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 50 [2022-11-20 21:25:12,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:12,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 3 [2022-11-20 21:25:12,044 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 5 treesize of output 3 [2022-11-20 21:25:12,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:12,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:12,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:12,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 97 [2022-11-20 21:25:12,223 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 5 treesize of output 3 [2022-11-20 21:25:12,227 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 5 treesize of output 3 [2022-11-20 21:25:12,235 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 21:25:12,236 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 21:25:12,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:12,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:12,293 INFO L321 Elim1Store]: treesize reduction 24, result has 25.0 percent of original size [2022-11-20 21:25:12,294 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 592 treesize of output 493 [2022-11-20 21:25:12,374 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 5 treesize of output 3 [2022-11-20 21:25:12,393 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 5 treesize of output 3 [2022-11-20 21:25:12,444 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 21:25:12,529 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 5 treesize of output 3 [2022-11-20 21:25:12,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:12,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 19 treesize of output 3 [2022-11-20 21:25:12,580 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 5 treesize of output 3 [2022-11-20 21:25:12,602 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 5 treesize of output 3 [2022-11-20 21:25:12,747 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 5 treesize of output 3 [2022-11-20 21:25:12,766 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:12,766 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 23 treesize of output 19 [2022-11-20 21:25:13,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:13,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:13,124 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:13,125 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 1 case distinctions, treesize of input 418 treesize of output 369 [2022-11-20 21:25:13,175 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 5 treesize of output 3 [2022-11-20 21:25:13,181 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 5 treesize of output 3 [2022-11-20 21:25:13,186 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 5 treesize of output 3 [2022-11-20 21:25:13,243 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 5 treesize of output 3 [2022-11-20 21:25:13,249 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 5 treesize of output 3 [2022-11-20 21:25:13,253 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 5 treesize of output 3 [2022-11-20 21:25:13,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:13,319 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:13,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-20 21:25:13,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:13,346 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-20 21:25:13,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 39 [2022-11-20 21:25:13,493 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 21:25:13,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 32 [2022-11-20 21:25:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:25:13,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:25:13,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:25:13,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812269419] [2022-11-20 21:25:13,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:25:13,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528742306] [2022-11-20 21:25:13,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528742306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:13,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796736654] [2022-11-20 21:25:13,927 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:25:13,927 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:25:13,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:25:13,927 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:25:13,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:25:14,100 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-20 21:25:14,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-20 21:25:14,315 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-20 21:25:14,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-20 21:25:14,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-11-20 21:25:14,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2022-11-20 21:25:14,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:14,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:14,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:14,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,608 INFO L321 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2022-11-20 21:25:14,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 492 treesize of output 489 [2022-11-20 21:25:14,723 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 27 treesize of output 27 [2022-11-20 21:25:14,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:14,746 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:14,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:14,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:14,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:14,784 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:25:14,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-20 21:25:14,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:14,826 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:14,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:14,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:14,878 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:14,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-20 21:25:14,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:14,912 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:14,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:14,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:14,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:14,941 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:14,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:15,095 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:25:15,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '923#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2022-11-20 21:25:15,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:25:15,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:25:15,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2022-11-20 21:25:15,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369496551] [2022-11-20 21:25:15,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:15,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 21:25:15,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:25:15,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 21:25:15,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=468, Unknown=8, NotChecked=0, Total=552 [2022-11-20 21:25:15,782 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2022-11-20 21:25:16,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:16,172 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-11-20 21:25:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:25:16,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 [2022-11-20 21:25:16,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:16,173 INFO L225 Difference]: With dead ends: 31 [2022-11-20 21:25:16,173 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 21:25:16,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=103, Invalid=590, Unknown=9, NotChecked=0, Total=702 [2022-11-20 21:25:16,175 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:16,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-20 21:25:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 21:25:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-11-20 21:25:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-20 21:25:16,191 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 14 [2022-11-20 21:25:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:16,192 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-20 21:25:16,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2022-11-20 21:25:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-20 21:25:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:25:16,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:16,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:16,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:16,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 21:25:16,400 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:25:16,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:16,400 INFO L85 PathProgramCache]: Analyzing trace with hash 970754635, now seen corresponding path program 3 times [2022-11-20 21:25:16,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:25:16,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583255462] [2022-11-20 21:25:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:16,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:25:16,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:25:16,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651500674] [2022-11-20 21:25:16,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:25:16,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:16,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:16,432 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:16,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 21:25:16,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:25:16,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:25:16,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-20 21:25:16,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:16,587 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 10 treesize of output 8 [2022-11-20 21:25:16,794 INFO L321 Elim1Store]: treesize reduction 78, result has 41.4 percent of original size [2022-11-20 21:25:16,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 272 [2022-11-20 21:25:16,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-20 21:25:16,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-20 21:25:16,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-20 21:25:17,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:17,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:17,167 INFO L321 Elim1Store]: treesize reduction 24, result has 25.0 percent of original size [2022-11-20 21:25:17,168 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 154 [2022-11-20 21:25:17,201 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 5 treesize of output 3 [2022-11-20 21:25:17,262 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 5 treesize of output 3 [2022-11-20 21:25:17,287 WARN L859 $PredicateComparison]: unable to prove that (and (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (let ((.cse0 (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) (.cse1 (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|))) (or (and .cse0 .cse1 (exists ((v_DerPreprocessor_53 (Array Int Int)) (v_DerPreprocessor_54 (Array Int Int)) (v_DerPreprocessor_55 (Array Int Int)) (v_DerPreprocessor_44 (Array Int Int)) (v_DerPreprocessor_45 (Array Int Int)) (v_DerPreprocessor_46 (Array Int Int))) (let ((.cse3 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_53) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_54) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_55) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_53) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_54) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_55))) (let ((.cse2 (store (store (store (store (store (store .cse3 |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_44) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_45) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_46) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_44) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_45) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_46))) (let ((.cse4 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= v_DerPreprocessor_45 (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|)) (= (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|) .cse4) (= (select v_DerPreprocessor_46 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse4) (= (select v_DerPreprocessor_55 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|) v_DerPreprocessor_54))))))) (and (or (and .cse0 (exists ((v_DerPreprocessor_48 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int)) (v_DerPreprocessor_47 (Array Int Int))) (let ((.cse5 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_47) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_48) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_49) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_47) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_48) |c_ULTIMATE.start_main_~c~0#1.base| v_DerPreprocessor_49))) (and (= (select v_DerPreprocessor_49 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (select .cse5 |c_ULTIMATE.start_main_~b~0#1.base|)) (= (select .cse5 |c_ULTIMATE.start_main_~a~0#1.base|) v_DerPreprocessor_47))))) (and .cse0 (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)))) (not .cse1)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) is different from true [2022-11-20 21:25:17,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:17,346 INFO L321 Elim1Store]: treesize reduction 26, result has 40.9 percent of original size [2022-11-20 21:25:17,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 188 treesize of output 193 [2022-11-20 21:25:17,374 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 5 treesize of output 3 [2022-11-20 21:25:17,400 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 5 treesize of output 3 [2022-11-20 21:25:17,406 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 5 treesize of output 3 [2022-11-20 21:25:17,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 [2022-11-20 21:25:17,441 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 21:25:17,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 33 [2022-11-20 21:25:17,537 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 21:25:17,537 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 1 case distinctions, treesize of input 33 treesize of output 42 [2022-11-20 21:25:17,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:17,685 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 35 treesize of output 34 [2022-11-20 21:25:17,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:17,736 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 35 treesize of output 34 [2022-11-20 21:25:17,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:17,777 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 21 treesize of output 20 [2022-11-20 21:25:17,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:17,813 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 23 treesize of output 22 [2022-11-20 21:25:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-20 21:25:17,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:25:23,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:25:23,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583255462] [2022-11-20 21:25:23,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:25:23,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651500674] [2022-11-20 21:25:23,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651500674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:23,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1441158191] [2022-11-20 21:25:23,563 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:25:23,564 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:25:23,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:25:23,564 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:25:23,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:25:23,663 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:25:23,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-20 21:25:23,868 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-20 21:25:23,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-20 21:25:23,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-20 21:25:23,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:23,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:23,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-20 21:25:24,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:24,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:24,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:24,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,106 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-20 21:25:24,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-20 21:25:24,216 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 27 treesize of output 27 [2022-11-20 21:25:24,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:24,235 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:24,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:24,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:24,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:24,278 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:25:24,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-20 21:25:24,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:24,315 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:24,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:24,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:24,356 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:24,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:24,392 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:24,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:24,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:24,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:24,422 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:24,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:24,438 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:25:24,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1130#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:25:24,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:25:24,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:25:24,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-11-20 21:25:24,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340759925] [2022-11-20 21:25:24,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:24,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 21:25:24,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:25:24,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 21:25:24,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=4, NotChecked=48, Total=702 [2022-11-20 21:25:24,966 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2022-11-20 21:25:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:25,635 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-11-20 21:25:25,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 21:25:25,635 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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 [2022-11-20 21:25:25,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:25,636 INFO L225 Difference]: With dead ends: 63 [2022-11-20 21:25:25,636 INFO L226 Difference]: Without dead ends: 61 [2022-11-20 21:25:25,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=169, Invalid=953, Unknown=4, NotChecked=64, Total=1190 [2022-11-20 21:25:25,638 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:25,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 69 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 141 Unchecked, 0.1s Time] [2022-11-20 21:25:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-20 21:25:25,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2022-11-20 21:25:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-11-20 21:25:25,650 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 14 [2022-11-20 21:25:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:25,650 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-11-20 21:25:25,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2022-11-20 21:25:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-11-20 21:25:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 21:25:25,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:25,651 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:25,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:25,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 21:25:25,857 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:25:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:25,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1815978007, now seen corresponding path program 2 times [2022-11-20 21:25:25,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:25:25,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488168868] [2022-11-20 21:25:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:25,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:25:25,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:25:25,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38277041] [2022-11-20 21:25:25,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:25:25,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:25,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:25,899 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:25,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 21:25:26,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:25:26,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:25:26,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:25:26,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:25:26,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:25:26,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:25:26,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488168868] [2022-11-20 21:25:26,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:25:26,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38277041] [2022-11-20 21:25:26,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38277041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:26,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [357372396] [2022-11-20 21:25:26,078 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:25:26,078 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:25:26,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:25:26,079 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:25:26,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:25:26,283 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-20 21:25:26,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-20 21:25:26,396 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:25:26,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-20 21:25:26,627 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-20 21:25:26,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-20 21:25:26,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:26,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:26,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-20 21:25:26,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:26,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:26,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:26,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:26,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:26,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:26,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:26,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:26,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:26,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:26,817 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-20 21:25:26,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-20 21:25:26,913 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 27 treesize of output 27 [2022-11-20 21:25:26,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:26,931 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:26,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-20 21:25:26,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:26,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:26,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:26,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:26,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:26,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:26,996 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-20 21:25:26,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-20 21:25:27,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:27,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:27,034 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:27,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:27,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:27,050 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:27,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-20 21:25:27,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:27,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:27,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:27,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:27,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:27,115 INFO L321 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-20 21:25:27,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 115 [2022-11-20 21:25:27,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:27,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:27,161 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:27,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:27,308 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:25:27,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1408#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:25:27,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:25:27,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:25:27,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-20 21:25:27,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284430065] [2022-11-20 21:25:27,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:27,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 21:25:27,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:25:27,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 21:25:27,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-20 21:25:27,646 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:27,803 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2022-11-20 21:25:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:25:27,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 21:25:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:27,804 INFO L225 Difference]: With dead ends: 62 [2022-11-20 21:25:27,804 INFO L226 Difference]: Without dead ends: 53 [2022-11-20 21:25:27,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-20 21:25:27,805 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:27,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 31 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:25:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-20 21:25:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2022-11-20 21:25:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 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) [2022-11-20 21:25:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-11-20 21:25:27,816 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 15 [2022-11-20 21:25:27,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:27,817 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-11-20 21:25:27,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-11-20 21:25:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 21:25:27,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:27,818 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:27,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:28,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:28,024 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:25:28,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2106634379, now seen corresponding path program 4 times [2022-11-20 21:25:28,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:25:28,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397498150] [2022-11-20 21:25:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:28,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:25:28,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:25:28,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89538528] [2022-11-20 21:25:28,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:25:28,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:28,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:28,065 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:28,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 21:25:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:28,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:25:28,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:25:28,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:25:28,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:25:28,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397498150] [2022-11-20 21:25:28,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:25:28,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89538528] [2022-11-20 21:25:28,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89538528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:28,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1116982797] [2022-11-20 21:25:28,293 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:25:28,293 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:25:28,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:25:28,293 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:25:28,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:25:28,517 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-20 21:25:28,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-20 21:25:28,629 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:25:28,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-20 21:25:28,863 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-20 21:25:28,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-20 21:25:28,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:28,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:28,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-20 21:25:29,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:29,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:29,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:29,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,055 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-20 21:25:29,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-20 21:25:29,154 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 27 treesize of output 27 [2022-11-20 21:25:29,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:29,174 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:29,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:29,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:29,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:29,207 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:25:29,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-20 21:25:29,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:29,255 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:29,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:29,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:29,298 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:29,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:29,331 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:29,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:29,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:29,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:29,356 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:29,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:29,371 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:25:29,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1678#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:25:29,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:25:29,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:25:29,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-20 21:25:29,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152992389] [2022-11-20 21:25:29,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:29,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:25:29,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:25:29,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:25:29,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:25:29,721 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2022-11-20 21:25:30,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:30,000 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2022-11-20 21:25:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 21:25:30,000 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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 15 [2022-11-20 21:25:30,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:30,002 INFO L225 Difference]: With dead ends: 71 [2022-11-20 21:25:30,002 INFO L226 Difference]: Without dead ends: 61 [2022-11-20 21:25:30,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:25:30,003 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:30,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:25:30,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-20 21:25:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2022-11-20 21:25:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-11-20 21:25:30,015 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 15 [2022-11-20 21:25:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:30,015 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-11-20 21:25:30,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2022-11-20 21:25:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-11-20 21:25:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 21:25:30,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:30,017 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:30,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:30,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:30,226 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:25:30,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:30,227 INFO L85 PathProgramCache]: Analyzing trace with hash 592635563, now seen corresponding path program 5 times [2022-11-20 21:25:30,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:25:30,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794472385] [2022-11-20 21:25:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:30,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:25:30,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:25:30,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899706074] [2022-11-20 21:25:30,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:25:30,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:30,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:30,272 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:30,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 21:25:30,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 21:25:30,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:25:30,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:25:30,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:25:30,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:25:30,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:25:30,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794472385] [2022-11-20 21:25:30,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:25:30,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899706074] [2022-11-20 21:25:30,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899706074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:30,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516227636] [2022-11-20 21:25:30,556 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:25:30,557 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:25:30,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:25:30,557 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:25:30,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:25:30,647 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:25:30,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-20 21:25:30,851 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-20 21:25:30,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-20 21:25:30,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-20 21:25:30,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:30,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2022-11-20 21:25:31,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:31,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:31,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:31,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,059 INFO L321 Elim1Store]: treesize reduction 139, result has 9.7 percent of original size [2022-11-20 21:25:31,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 484 treesize of output 487 [2022-11-20 21:25:31,164 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 27 treesize of output 27 [2022-11-20 21:25:31,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:31,184 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:31,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:31,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:31,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:31,220 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:25:31,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-20 21:25:31,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:31,256 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:31,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:31,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:31,306 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:31,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:31,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:31,347 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:31,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:31,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:31,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:31,372 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:31,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:31,385 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:25:31,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1967#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:25:31,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:25:31,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:25:31,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-20 21:25:31,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352509433] [2022-11-20 21:25:31,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:31,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:25:31,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:25:31,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:25:31,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:25:31,751 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2022-11-20 21:25:32,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:32,026 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-11-20 21:25:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 21:25:32,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 21:25:32,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:32,027 INFO L225 Difference]: With dead ends: 73 [2022-11-20 21:25:32,027 INFO L226 Difference]: Without dead ends: 49 [2022-11-20 21:25:32,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-11-20 21:25:32,028 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:32,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 33 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:25:32,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-20 21:25:32,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 27. [2022-11-20 21:25:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-20 21:25:32,038 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2022-11-20 21:25:32,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:32,038 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-20 21:25:32,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2022-11-20 21:25:32,038 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-20 21:25:32,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 21:25:32,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:32,039 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:32,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:32,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 21:25:32,242 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:25:32,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:32,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1741655437, now seen corresponding path program 3 times [2022-11-20 21:25:32,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:25:32,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655616520] [2022-11-20 21:25:32,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:32,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:25:32,276 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:25:32,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481153635] [2022-11-20 21:25:32,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:25:32,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:32,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:32,278 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:32,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 21:25:32,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:25:32,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:25:32,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-20 21:25:32,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:33,128 INFO L321 Elim1Store]: treesize reduction 252, result has 37.8 percent of original size [2022-11-20 21:25:33,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 462 treesize of output 894 [2022-11-20 21:25:33,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-20 21:25:33,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-20 21:25:33,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-20 21:25:33,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 17 treesize of output 15 [2022-11-20 21:25:33,674 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 5 treesize of output 3 [2022-11-20 21:25:35,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:35,273 INFO L321 Elim1Store]: treesize reduction 117, result has 17.6 percent of original size [2022-11-20 21:25:35,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 15 case distinctions, treesize of input 833 treesize of output 873 [2022-11-20 21:25:43,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 6096 treesize of output 5714 [2022-11-20 21:25:45,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:45,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:45,849 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-20 21:25:45,850 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 3494 treesize of output 3359 [2022-11-20 21:25:46,525 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 5 treesize of output 3 [2022-11-20 21:25:46,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:46,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:46,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:46,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 122 [2022-11-20 21:25:46,784 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 5 treesize of output 3 [2022-11-20 21:25:46,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:46,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:46,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:46,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 168 [2022-11-20 21:25:46,979 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 150 treesize of output 148 [2022-11-20 21:25:46,993 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 148 treesize of output 146 [2022-11-20 21:25:47,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:47,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:47,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:47,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 49 [2022-11-20 21:25:47,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:47,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:47,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:47,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:47,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 46 [2022-11-20 21:25:47,155 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 5 treesize of output 3 [2022-11-20 21:25:47,160 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 5 treesize of output 3 [2022-11-20 21:25:47,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:47,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:47,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:47,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:47,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 29 [2022-11-20 21:25:47,365 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 5 treesize of output 3 [2022-11-20 21:25:47,370 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 5 treesize of output 3 [2022-11-20 21:25:47,375 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 5 treesize of output 3 [2022-11-20 21:25:47,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:47,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-20 21:25:47,431 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 9 treesize of output 7 [2022-11-20 21:25:47,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:47,847 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 9 treesize of output 7 [2022-11-20 21:25:48,354 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:48,354 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 23 treesize of output 19 [2022-11-20 21:25:49,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:49,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:49,295 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:49,296 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 1 case distinctions, treesize of input 1232 treesize of output 1085 [2022-11-20 21:25:49,349 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 5 treesize of output 3 [2022-11-20 21:25:49,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:49,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 62 [2022-11-20 21:25:49,364 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 9 treesize of output 7 [2022-11-20 21:25:49,380 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 5 treesize of output 3 [2022-11-20 21:25:49,396 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 5 treesize of output 3 [2022-11-20 21:25:49,412 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 5 treesize of output 3 [2022-11-20 21:25:49,480 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 5 treesize of output 3 [2022-11-20 21:25:49,487 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 5 treesize of output 3 [2022-11-20 21:25:49,513 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 5 treesize of output 3 [2022-11-20 21:25:49,524 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 5 treesize of output 3 [2022-11-20 21:25:49,548 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 21:25:49,561 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 21:25:49,628 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:49,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-11-20 21:25:49,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:49,710 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:49,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-20 21:25:49,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:49,764 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:49,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-20 21:25:49,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:49,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:49,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:49,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:49,799 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-11-20 21:25:49,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 58 [2022-11-20 21:25:49,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:49,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:49,854 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-20 21:25:49,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 51 [2022-11-20 21:25:50,087 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 21:25:50,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 32 [2022-11-20 21:25:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:25:50,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:51,006 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_256| Int) (v_ArrVal_796 Int) (v_ArrVal_794 Int) (v_ArrVal_793 (Array Int Int))) (or (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_793))) (let ((.cse1 (store (store (select .cse0 |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_794) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_256|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_796))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~b~0#1.base| .cse1) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) (select .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|)))) 1) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_256|)))) is different from false [2022-11-20 21:25:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-20 21:25:51,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:25:51,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655616520] [2022-11-20 21:25:51,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:25:51,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481153635] [2022-11-20 21:25:51,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481153635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:51,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709630944] [2022-11-20 21:25:51,045 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:25:51,045 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:25:51,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:25:51,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:25:51,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:25:51,219 INFO L321 Elim1Store]: treesize reduction 209, result has 23.4 percent of original size [2022-11-20 21:25:51,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 82 [2022-11-20 21:25:51,316 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 21:25:51,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-20 21:25:51,580 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-20 21:25:51,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-20 21:25:51,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:51,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 62 [2022-11-20 21:25:51,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:51,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:51,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:51,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:51,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:51,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:51,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:51,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:51,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:51,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:51,796 INFO L321 Elim1Store]: treesize reduction 144, result has 6.5 percent of original size [2022-11-20 21:25:51,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 490 treesize of output 484 [2022-11-20 21:25:51,974 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 27 treesize of output 27 [2022-11-20 21:25:51,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:51,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:51,994 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:51,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:52,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:52,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:52,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:52,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:52,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:52,030 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 21:25:52,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 107 [2022-11-20 21:25:52,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:52,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:52,071 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:52,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:52,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:52,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:52,112 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:52,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:52,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:52,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:52,148 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:52,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:52,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:52,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:52,174 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:52,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:52,327 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:25:53,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2275#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2022-11-20 21:25:53,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:25:53,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:25:53,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-11-20 21:25:53,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377615255] [2022-11-20 21:25:53,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:53,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 21:25:53,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:25:53,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 21:25:53,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=756, Unknown=2, NotChecked=56, Total=930 [2022-11-20 21:25:53,227 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:53,269 WARN L859 $PredicateComparison]: unable to prove that (and (let ((.cse8 (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|))) (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse25 (select .cse8 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse26 (select .cse8 |c_ULTIMATE.start_main_~c~0#1.offset|))) (let ((.cse9 (= .cse26 0)) (.cse16 (= .cse8 (store (store .cse2 |c_ULTIMATE.start_main_~b~0#1.offset| .cse25) |c_ULTIMATE.start_main_~c~0#1.offset| .cse26))) (.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse17 (= (select .cse2 |c_ULTIMATE.start_main_~c~0#1.offset|) 1))) (or (and (or (and (exists ((v_arrayElimCell_389 (Array Int Int)) (v_DerPreprocessor_60 (Array Int Int)) (v_DerPreprocessor_59 (Array Int Int)) (v_prenex_211 (Array Int Int)) (v_prenex_212 (Array Int Int)) (v_prenex_533 (Array Int Int)) (v_DerPreprocessor_68 (Array Int Int)) (v_prenex_534 (Array Int Int)) (v_DerPreprocessor_69 (Array Int Int)) (v_prenex_535 (Array Int Int))) (let ((.cse7 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_68) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_69) |c_ULTIMATE.start_main_~c~0#1.base| .cse8) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_68) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_69) |c_ULTIMATE.start_main_~c~0#1.base| .cse8))) (let ((.cse3 (store (store (store (store (store (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_59) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_60) |c_ULTIMATE.start_main_~c~0#1.base| v_arrayElimCell_389) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_59) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_60) |c_ULTIMATE.start_main_~c~0#1.base| v_arrayElimCell_389))) (let ((.cse1 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_533) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_534) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_535) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_533) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_534) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_535)) (.cse6 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_211) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_212) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_535) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_211) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_212) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_535)) (.cse0 (select .cse7 |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse5 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= 1 (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|)) (= (select .cse1 |c_ULTIMATE.start_main_~b~0#1.base|) .cse2) (= (select v_arrayElimCell_389 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select v_prenex_535 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= .cse2 (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|)) (= .cse4 .cse5) (= .cse5 (select .cse6 |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) (= (select .cse6 |c_ULTIMATE.start_main_~b~0#1.base|) .cse0) (= .cse5 (select .cse7 |c_ULTIMATE.start_main_~a~0#1.base|))))))) .cse9) (and .cse9 (exists ((v_prenex_525 (Array Int Int)) (v_prenex_516 (Array Int Int)) (v_prenex_517 (Array Int Int)) (v_prenex_518 (Array Int Int)) (v_prenex_519 (Array Int Int)) (v_prenex_520 (Array Int Int)) (v_prenex_521 (Array Int Int)) (v_prenex_522 (Array Int Int)) (v_prenex_523 (Array Int Int)) (v_prenex_524 (Array Int Int))) (let ((.cse13 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_524) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_525) |c_ULTIMATE.start_main_~c~0#1.base| .cse8) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_524) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_525) |c_ULTIMATE.start_main_~c~0#1.base| .cse8))) (let ((.cse12 (store (store (store (store (store (store .cse13 |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_519) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_518) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_517) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_519) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_518) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_517))) (let ((.cse11 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_520) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_521) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_523) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_520) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_521) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_523)) (.cse14 (select .cse13 |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse10 (select .cse12 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse15 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_516) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_522) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_523) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_516) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_522) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_523))) (and (= .cse10 (select .cse11 |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select v_prenex_517 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= .cse2 (select .cse12 |c_ULTIMATE.start_main_~b~0#1.base|)) (= (select v_prenex_523 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= .cse4 .cse10) (= .cse10 (select .cse13 |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse14 (select .cse11 |c_ULTIMATE.start_main_~b~0#1.base|)) (= (select .cse14 |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= .cse10 (select .cse15 |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse2 (select .cse15 |c_ULTIMATE.start_main_~b~0#1.base|))))))) .cse16)) .cse17) (and .cse9 (exists ((v_prenex_490 (Array Int Int)) (v_prenex_491 (Array Int Int)) (v_prenex_483 (Array Int Int)) (v_prenex_484 (Array Int Int)) (v_prenex_495 (Array Int Int)) (v_prenex_497 (Array Int Int)) (v_prenex_487 (Array Int Int)) (v_prenex_488 (Array Int Int)) (v_prenex_489 (Array Int Int))) (let ((.cse27 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_495) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_497) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_489) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_495) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_497) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_489))) (let ((.cse29 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_483) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_484) |c_ULTIMATE.start_main_~c~0#1.base| .cse8) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_483) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_484) |c_ULTIMATE.start_main_~c~0#1.base| .cse8)) (.cse19 (select .cse27 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse28 (store (store (store (store (store (store .cse29 |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_488) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_487) |c_ULTIMATE.start_main_~c~0#1.base| .cse19) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_488) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_487) |c_ULTIMATE.start_main_~c~0#1.base| .cse19)) (.cse24 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_490) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_491) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_489) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_490) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_491) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_489))) (let ((.cse23 (select .cse24 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse22 (select .cse29 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse21 (select .cse29 |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse20 (select .cse28 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse18 (select .cse28 |c_ULTIMATE.start_main_~b~0#1.base|))) (and (= (select .cse18 |c_ULTIMATE.start_main_~c~0#1.offset|) 1) (= .cse19 .cse20) (= (select .cse19 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select .cse21 |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= .cse22 v_prenex_483) (= .cse19 .cse23) (= .cse4 .cse19) (= v_prenex_490 .cse23) (= .cse19 v_prenex_495) (= .cse22 .cse19) (= .cse21 (select .cse24 |c_ULTIMATE.start_main_~b~0#1.base|)) (= .cse8 (store (store .cse18 |c_ULTIMATE.start_main_~b~0#1.offset| .cse25) |c_ULTIMATE.start_main_~c~0#1.offset| .cse26)) (= v_prenex_488 .cse20) (= (select v_prenex_489 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= .cse18 (select .cse27 |c_ULTIMATE.start_main_~b~0#1.base|)) (= .cse2 .cse18)))))))) (and .cse9 (exists ((v_DerPreprocessor_80 (Array Int Int)) (v_prenex_408 (Array Int Int)) (v_DerPreprocessor_81 (Array Int Int)) (v_prenex_409 (Array Int Int)) (v_prenex_254 (Array Int Int)) (v_DerPreprocessor_83 Int) (v_prenex_255 (Array Int Int)) (v_prenex_410 (Array Int Int)) (v_prenex_256 (Array Int Int)) (v_prenex_257 (Array Int Int))) (let ((.cse32 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_408) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_409) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_410) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_408) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_409) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_410))) (let ((.cse39 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_80) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_81) |c_ULTIMATE.start_main_~c~0#1.base| .cse8) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_80) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_81) |c_ULTIMATE.start_main_~c~0#1.base| .cse8)) (.cse33 (select .cse32 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse37 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_256) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_257) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_410) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_256) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_257) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_410)) (.cse38 (store (store (store (store (store (store .cse39 |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_255) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_254) |c_ULTIMATE.start_main_~c~0#1.base| .cse33) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_255) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_254) |c_ULTIMATE.start_main_~c~0#1.base| .cse33))) (let ((.cse34 (select .cse38 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse35 (select .cse37 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse31 (select .cse39 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse36 (select .cse39 |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse30 (select .cse38 |c_ULTIMATE.start_main_~b~0#1.base|))) (and (= .cse2 .cse30) (= .cse31 v_DerPreprocessor_80) (= .cse30 (select .cse32 |c_ULTIMATE.start_main_~b~0#1.base|)) (= .cse33 .cse34) (= .cse35 .cse33) (= (select .cse36 |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= v_prenex_255 .cse34) (= .cse4 .cse33) (= .cse35 v_prenex_256) (= .cse31 .cse33) (= (select .cse33 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select .cse30 |c_ULTIMATE.start_main_~c~0#1.offset|) 1) (= (select v_prenex_410 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= v_prenex_408 .cse33) (= .cse36 (select .cse37 |c_ULTIMATE.start_main_~b~0#1.base|)) (= v_DerPreprocessor_83 (select (store (store .cse30 |c_ULTIMATE.start_main_~b~0#1.offset| v_DerPreprocessor_83) |c_ULTIMATE.start_main_~c~0#1.offset| 0) |c_ULTIMATE.start_main_~b~0#1.offset|))))))))) (and (or (and .cse9 (exists ((v_prenex_504 (Array Int Int)) (v_prenex_505 (Array Int Int)) (v_prenex_506 (Array Int Int)) (v_prenex_507 (Array Int Int)) (v_prenex_508 (Array Int Int)) (v_prenex_509 (Array Int Int)) (v_prenex_510 (Array Int Int)) (v_prenex_511 (Array Int Int)) (v_prenex_512 (Array Int Int)) (v_prenex_513 (Array Int Int))) (let ((.cse44 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_504) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_505) |c_ULTIMATE.start_main_~c~0#1.base| .cse8) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_504) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_505) |c_ULTIMATE.start_main_~c~0#1.base| .cse8))) (let ((.cse40 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_507) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_509) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_511) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_507) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_509) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_511)) (.cse42 (store (store (store (store (store (store .cse44 |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_510) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_508) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_506) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_510) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_508) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_506)) (.cse43 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_512) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_513) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_511) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_512) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_513) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_511)) (.cse41 (select .cse44 |c_ULTIMATE.start_main_~b~0#1.base|))) (and (= .cse2 (select .cse40 |c_ULTIMATE.start_main_~b~0#1.base|)) (= (select v_prenex_511 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= .cse41 (select .cse40 |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select .cse42 |c_ULTIMATE.start_main_~b~0#1.base|) .cse2) (= .cse41 (select .cse43 |c_ULTIMATE.start_main_~b~0#1.base|)) (= .cse41 (select .cse42 |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select v_prenex_506 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= .cse41 (select .cse44 |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse41 (select .cse43 |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse4 .cse41) (= (select .cse41 |c_ULTIMATE.start_main_~b~0#1.offset|) 1)))))) (and .cse9 .cse16 (exists ((v_prenex_526 (Array Int Int)) (v_prenex_527 (Array Int Int)) (v_prenex_528 (Array Int Int)) (v_prenex_529 (Array Int Int)) (v_DerPreprocessor_71 (Array Int Int)) (v_DerPreprocessor_72 (Array Int Int)) (v_prenex_364 (Array Int Int)) (v_prenex_365 (Array Int Int)) (v_prenex_530 (Array Int Int)) (v_prenex_366 (Array Int Int))) (let ((.cse47 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_71) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_72) |c_ULTIMATE.start_main_~c~0#1.base| .cse8) |c_ULTIMATE.start_main_~a~0#1.base| v_DerPreprocessor_71) |c_ULTIMATE.start_main_~b~0#1.base| v_DerPreprocessor_72) |c_ULTIMATE.start_main_~c~0#1.base| .cse8))) (let ((.cse48 (store (store (store (store (store (store .cse47 |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_528) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_527) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_526) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_528) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_527) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_526)) (.cse46 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_529) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_530) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_366) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_529) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_530) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_366)) (.cse45 (select .cse47 |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse49 (store (store (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_364) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_365) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_366) |c_ULTIMATE.start_main_~a~0#1.base| v_prenex_364) |c_ULTIMATE.start_main_~b~0#1.base| v_prenex_365) |c_ULTIMATE.start_main_~c~0#1.base| v_prenex_366))) (and (= .cse45 (select .cse46 |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse45 (select .cse47 |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse2 (select .cse48 |c_ULTIMATE.start_main_~b~0#1.base|)) (= (select .cse45 |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= (select .cse49 |c_ULTIMATE.start_main_~b~0#1.base|) .cse2) (= (select v_prenex_366 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select v_prenex_526 |c_ULTIMATE.start_main_~c~0#1.offset|) 0) (= (select .cse48 |c_ULTIMATE.start_main_~a~0#1.base|) .cse45) (= .cse45 (select .cse46 |c_ULTIMATE.start_main_~b~0#1.base|)) (= .cse45 .cse4) (= .cse45 (select .cse49 |c_ULTIMATE.start_main_~a~0#1.base|)))))))) .cse17))))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (forall ((|v_ULTIMATE.start_main_~i~0#1_256| Int) (v_ArrVal_796 Int) (v_ArrVal_794 Int) (v_ArrVal_793 (Array Int Int))) (or (= (let ((.cse50 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_793))) (let ((.cse51 (store (store (select .cse50 |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_794) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_256|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_796))) (+ (select (select (store .cse50 |c_ULTIMATE.start_main_~b~0#1.base| .cse51) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) (select .cse51 |c_ULTIMATE.start_main_~b~0#1.offset|)))) 1) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_256|)))) (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~c~0#1.base|)) (= |c_ULTIMATE.start_main_~c~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|))) is different from true [2022-11-20 21:25:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:53,876 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-20 21:25:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 21:25:53,876 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 21:25:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:53,877 INFO L225 Difference]: With dead ends: 32 [2022-11-20 21:25:53,877 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 21:25:53,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=167, Invalid=1020, Unknown=11, NotChecked=134, Total=1332 [2022-11-20 21:25:53,878 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:53,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-11-20 21:25:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 21:25:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-20 21:25:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-20 21:25:53,891 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 17 [2022-11-20 21:25:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:53,892 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-20 21:25:53,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-20 21:25:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 21:25:53,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:53,893 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:53,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:54,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 21:25:54,100 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:25:54,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash 553715545, now seen corresponding path program 6 times [2022-11-20 21:25:54,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:25:54,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351404483] [2022-11-20 21:25:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:54,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:25:54,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:25:54,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466351923] [2022-11-20 21:25:54,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:25:54,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:54,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:54,121 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:54,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 21:25:54,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:25:54,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:25:54,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 21:25:54,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:54,431 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2022-11-20 21:25:54,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2022-11-20 21:25:54,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-20 21:25:54,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-20 21:25:54,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-11-20 21:25:54,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:54,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:54,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:54,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 74 [2022-11-20 21:25:54,545 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 5 treesize of output 3 [2022-11-20 21:25:54,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:54,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:54,618 INFO L321 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-11-20 21:25:54,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 95 [2022-11-20 21:25:54,649 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 5 treesize of output 3 [2022-11-20 21:25:54,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:54,771 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-20 21:25:54,772 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 52 treesize of output 23 [2022-11-20 21:25:54,784 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 5 treesize of output 3 [2022-11-20 21:25:54,847 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 14 treesize of output 12 [2022-11-20 21:25:54,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:54,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:54,945 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-20 21:25:54,946 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 2 case distinctions, treesize of input 86 treesize of output 87 [2022-11-20 21:25:54,950 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 5 treesize of output 3 [2022-11-20 21:25:54,956 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 5 treesize of output 3 [2022-11-20 21:25:54,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:25:55,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:25:55,043 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 14 treesize of output 16 [2022-11-20 21:25:55,053 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 14 treesize of output 16 [2022-11-20 21:25:55,068 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 14 treesize of output 16 [2022-11-20 21:25:55,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:55,112 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 21 treesize of output 20 [2022-11-20 21:25:55,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:55,139 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 23 treesize of output 22 [2022-11-20 21:25:55,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:55,167 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 23 treesize of output 22 [2022-11-20 21:25:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:25:55,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:57,352 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_282| Int) (|v_ULTIMATE.start_main_~i~0#1_281| Int) (v_ArrVal_903 Int) (v_ArrVal_901 Int) (v_ArrVal_900 Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_282|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_282| 1) |v_ULTIMATE.start_main_~i~0#1_281|)) (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_900) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_282|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_901) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_281|) |c_ULTIMATE.start_main_~c~0#1.offset|) v_ArrVal_903) |c_ULTIMATE.start_main_~c~0#1.offset|) 0))) is different from false [2022-11-20 21:25:57,415 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_898 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_898) |c_ULTIMATE.start_main_~c~0#1.base|) |c_ULTIMATE.start_main_~c~0#1.offset|) 0)) is different from false [2022-11-20 21:25:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 9 not checked. [2022-11-20 21:25:57,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:25:57,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351404483] [2022-11-20 21:25:57,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:25:57,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466351923] [2022-11-20 21:25:57,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466351923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:57,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [182484570] [2022-11-20 21:25:57,485 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-20 21:25:57,485 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:25:57,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:25:57,486 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:25:57,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:25:57,672 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-20 21:25:57,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2022-11-20 21:25:57,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 18 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-11-20 21:25:57,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-20 21:25:57,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:57,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:57,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 70 [2022-11-20 21:25:57,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:57,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:57,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:57,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:57,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:57,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:57,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:57,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:57,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:57,869 INFO L321 Elim1Store]: treesize reduction 172, result has 0.6 percent of original size [2022-11-20 21:25:57,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 503 treesize of output 486 [2022-11-20 21:25:57,954 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 27 treesize of output 27 [2022-11-20 21:25:57,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:57,971 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:57,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-20 21:25:57,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:57,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:58,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:58,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:58,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:58,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:58,039 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-20 21:25:58,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-20 21:25:58,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:58,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:58,080 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:58,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:58,105 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:58,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-20 21:25:58,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:58,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:58,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:58,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:58,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:58,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:58,172 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-20 21:25:58,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 98 treesize of output 110 [2022-11-20 21:25:58,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:58,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:58,222 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 21:25:58,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-20 21:25:58,266 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:25:58,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2513#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-20 21:25:58,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:25:58,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:25:58,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2022-11-20 21:25:58,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29781410] [2022-11-20 21:25:58,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:58,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 21:25:58,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:25:58,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 21:25:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=375, Unknown=15, NotChecked=82, Total=552 [2022-11-20 21:25:58,831 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2022-11-20 21:26:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:26:03,275 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-11-20 21:26:03,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 21:26:03,276 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 21:26:03,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:26:03,276 INFO L225 Difference]: With dead ends: 45 [2022-11-20 21:26:03,276 INFO L226 Difference]: Without dead ends: 43 [2022-11-20 21:26:03,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=146, Invalid=651, Unknown=23, NotChecked=110, Total=930 [2022-11-20 21:26:03,277 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:26:03,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 54 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-11-20 21:26:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-20 21:26:03,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2022-11-20 21:26:03,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:26:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-20 21:26:03,290 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 17 [2022-11-20 21:26:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:26:03,290 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-20 21:26:03,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2022-11-20 21:26:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-20 21:26:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 21:26:03,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:26:03,291 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:26:03,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 21:26:03,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:26:03,498 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:26:03,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:26:03,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1837651189, now seen corresponding path program 4 times [2022-11-20 21:26:03,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:26:03,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062171136] [2022-11-20 21:26:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:26:03,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:26:03,532 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:26:03,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541021665] [2022-11-20 21:26:03,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:26:03,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:26:03,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:26:03,545 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:26:03,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 21:26:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 21:26:03,707 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 21:26:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 21:26:03,775 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 21:26:03,776 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 21:26:03,777 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 21:26:03,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 21:26:03,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 21:26:03,982 INFO L444 BasicCegarLoop]: Path program histogram: [6, 4, 1, 1, 1, 1] [2022-11-20 21:26:03,985 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 21:26:04,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 09:26:04 BoogieIcfgContainer [2022-11-20 21:26:04,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 21:26:04,024 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 21:26:04,024 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 21:26:04,024 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 21:26:04,025 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:24:53" (3/4) ... [2022-11-20 21:26:04,027 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 21:26:04,083 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46d45e64-ee9f-4fa4-b811-5f6073f7ddad/bin/utaipan-6cKwYrpEi9/witness.graphml [2022-11-20 21:26:04,083 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 21:26:04,084 INFO L158 Benchmark]: Toolchain (without parser) took 70972.82ms. Allocated memory was 178.3MB in the beginning and 373.3MB in the end (delta: 195.0MB). Free memory was 133.8MB in the beginning and 218.3MB in the end (delta: -84.5MB). Peak memory consumption was 112.8MB. Max. memory is 16.1GB. [2022-11-20 21:26:04,084 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 138.4MB. Free memory was 79.2MB in the beginning and 79.1MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:26:04,084 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.60ms. Allocated memory is still 178.3MB. Free memory was 133.2MB in the beginning and 122.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 21:26:04,084 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.54ms. Allocated memory is still 178.3MB. Free memory was 122.6MB in the beginning and 121.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:26:04,085 INFO L158 Benchmark]: Boogie Preprocessor took 26.98ms. Allocated memory is still 178.3MB. Free memory was 121.2MB in the beginning and 119.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:26:04,085 INFO L158 Benchmark]: RCFGBuilder took 411.66ms. Allocated memory is still 178.3MB. Free memory was 119.7MB in the beginning and 103.8MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-20 21:26:04,085 INFO L158 Benchmark]: TraceAbstraction took 70203.18ms. Allocated memory was 178.3MB in the beginning and 373.3MB in the end (delta: 195.0MB). Free memory was 103.6MB in the beginning and 220.4MB in the end (delta: -116.8MB). Peak memory consumption was 81.4MB. Max. memory is 16.1GB. [2022-11-20 21:26:04,085 INFO L158 Benchmark]: Witness Printer took 59.23ms. Allocated memory is still 373.3MB. Free memory was 220.4MB in the beginning and 218.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:26:04,087 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 138.4MB. Free memory was 79.2MB in the beginning and 79.1MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.60ms. Allocated memory is still 178.3MB. Free memory was 133.2MB in the beginning and 122.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.54ms. Allocated memory is still 178.3MB. Free memory was 122.6MB in the beginning and 121.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.98ms. Allocated memory is still 178.3MB. Free memory was 121.2MB in the beginning and 119.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 411.66ms. Allocated memory is still 178.3MB. Free memory was 119.7MB in the beginning and 103.8MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 70203.18ms. Allocated memory was 178.3MB in the beginning and 373.3MB in the end (delta: 195.0MB). Free memory was 103.6MB in the beginning and 220.4MB in the end (delta: -116.8MB). Peak memory consumption was 81.4MB. Max. memory is 16.1GB. * Witness Printer took 59.23ms. Allocated memory is still 373.3MB. Free memory was 220.4MB in the beginning and 218.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] a[0] = 6 [L33] b[0] = 1 [L34] c[0] = 0 [L36] i=1 VAL [a={-1:0}, b={-2:0}, c={-3:0}, i=1, N=3] [L36] COND TRUE i