./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy6_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy6_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh --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 f9e86f2555d2c0682f4edf4cb7d0ea92e4bc79b6db041eb754ceacfe5541e219 --- 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-2329fc7 [2022-12-14 15:34:34,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:34:34,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:34:34,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:34:34,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:34:34,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:34:34,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:34:34,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:34:34,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:34:34,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:34:34,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:34:34,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:34:34,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:34:34,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:34:34,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:34:34,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:34:34,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:34:34,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:34:34,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:34:34,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:34:34,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:34:34,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:34:34,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:34:34,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:34:34,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:34:34,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:34:34,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:34:34,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:34:34,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:34:34,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:34:34,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:34:34,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:34:34,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:34:34,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:34:34,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:34:34,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:34:34,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:34:34,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:34:34,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:34:34,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:34:34,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:34:34,457 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:34:34,478 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:34:34,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:34:34,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:34:34,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:34:34,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:34:34,480 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:34:34,480 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:34:34,480 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:34:34,480 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:34:34,481 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:34:34,481 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:34:34,481 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:34:34,481 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:34:34,481 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:34:34,482 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:34:34,482 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:34:34,482 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:34:34,482 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:34:34,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:34:34,483 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:34:34,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:34:34,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:34:34,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:34:34,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:34:34,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:34:34,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:34:34,484 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:34:34,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:34:34,485 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:34:34,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:34:34,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:34:34,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:34:34,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:34:34,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:34:34,486 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:34:34,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:34:34,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:34:34,486 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:34:34,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:34:34,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:34:34,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:34:34,487 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_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9e86f2555d2c0682f4edf4cb7d0ea92e4bc79b6db041eb754ceacfe5541e219 [2022-12-14 15:34:34,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:34:34,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:34:34,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:34:34,695 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:34:34,695 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:34:34,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_copy6_ground-2.i [2022-12-14 15:34:37,284 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:34:37,417 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:34:37,418 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i [2022-12-14 15:34:37,424 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/data/747957de6/0d3841f2940a41dfbcb68357be1b915a/FLAG8a016bf22 [2022-12-14 15:34:37,437 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/data/747957de6/0d3841f2940a41dfbcb68357be1b915a [2022-12-14 15:34:37,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:34:37,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:34:37,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:34:37,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:34:37,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:34:37,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:34:37" (1/1) ... [2022-12-14 15:34:37,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12481ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37, skipping insertion in model container [2022-12-14 15:34:37,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:34:37" (1/1) ... [2022-12-14 15:34:37,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:34:37,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:34:37,586 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_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i[816,829] [2022-12-14 15:34:37,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:34:37,613 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:34:37,623 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_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i[816,829] [2022-12-14 15:34:37,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:34:37,648 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:34:37,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37 WrapperNode [2022-12-14 15:34:37,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:34:37,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:34:37,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:34:37,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:34:37,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37" (1/1) ... [2022-12-14 15:34:37,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37" (1/1) ... [2022-12-14 15:34:37,685 INFO L138 Inliner]: procedures = 16, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 144 [2022-12-14 15:34:37,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:34:37,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:34:37,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:34:37,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:34:37,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37" (1/1) ... [2022-12-14 15:34:37,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37" (1/1) ... [2022-12-14 15:34:37,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37" (1/1) ... [2022-12-14 15:34:37,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37" (1/1) ... [2022-12-14 15:34:37,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37" (1/1) ... [2022-12-14 15:34:37,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37" (1/1) ... [2022-12-14 15:34:37,711 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37" (1/1) ... [2022-12-14 15:34:37,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37" (1/1) ... [2022-12-14 15:34:37,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:34:37,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:34:37,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:34:37,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:34:37,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37" (1/1) ... [2022-12-14 15:34:37,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:34:37,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:34:37,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:34:37,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:34:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:34:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:34:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 15:34:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 15:34:37,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:34:37,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:34:37,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 15:34:37,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 15:34:37,849 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:34:37,851 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:34:38,028 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:34:38,085 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:34:38,086 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-12-14 15:34:38,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:34:38 BoogieIcfgContainer [2022-12-14 15:34:38,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:34:38,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:34:38,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:34:38,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:34:38,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:34:37" (1/3) ... [2022-12-14 15:34:38,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e41e618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:34:38, skipping insertion in model container [2022-12-14 15:34:38,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:34:37" (2/3) ... [2022-12-14 15:34:38,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e41e618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:34:38, skipping insertion in model container [2022-12-14 15:34:38,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:34:38" (3/3) ... [2022-12-14 15:34:38,097 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2022-12-14 15:34:38,119 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:34:38,120 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:34:38,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:34:38,174 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;@4d2f2eca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:34:38,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:34:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 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) [2022-12-14 15:34:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 15:34:38,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:34:38,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:34:38,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:34:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:34:38,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1131738135, now seen corresponding path program 1 times [2022-12-14 15:34:38,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:34:38,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337904788] [2022-12-14 15:34:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:38,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:34:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:34:38,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:34:38,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337904788] [2022-12-14 15:34:38,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337904788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:34:38,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:34:38,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 15:34:38,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670319859] [2022-12-14 15:34:38,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:34:38,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:34:38,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:34:38,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:34:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:34:38,513 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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) [2022-12-14 15:34:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:34:38,565 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2022-12-14 15:34:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:34:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 [2022-12-14 15:34:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:34:38,573 INFO L225 Difference]: With dead ends: 27 [2022-12-14 15:34:38,573 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 15:34:38,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:34:38,578 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:34:38,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:34:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 15:34:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 15:34:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:34:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2022-12-14 15:34:38,603 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 11 [2022-12-14 15:34:38,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:34:38,603 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2022-12-14 15:34:38,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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) [2022-12-14 15:34:38,604 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2022-12-14 15:34:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 15:34:38,604 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:34:38,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:34:38,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:34:38,605 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:34:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:34:38,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1018560725, now seen corresponding path program 1 times [2022-12-14 15:34:38,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:34:38,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690180275] [2022-12-14 15:34:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:38,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:34:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:34:38,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:34:38,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690180275] [2022-12-14 15:34:38,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690180275] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:34:38,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867215535] [2022-12-14 15:34:38,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:38,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:38,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:34:38,685 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:34:38,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:34:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:38,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:34:38,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:34:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:34:38,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:34:38,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867215535] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:34:38,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:34:38,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 15:34:38,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050050463] [2022-12-14 15:34:38,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:34:38,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:34:38,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:34:38,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:34:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:34:38,785 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:34:38,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:34:38,824 INFO L93 Difference]: Finished difference Result 30 states and 48 transitions. [2022-12-14 15:34:38,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:34:38,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 15:34:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:34:38,825 INFO L225 Difference]: With dead ends: 30 [2022-12-14 15:34:38,825 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 15:34:38,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:34:38,827 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:34:38,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:34:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 15:34:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 15:34:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:34:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2022-12-14 15:34:38,830 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 12 [2022-12-14 15:34:38,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:34:38,830 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2022-12-14 15:34:38,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:34:38,831 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2022-12-14 15:34:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 15:34:38,831 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:34:38,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:34:38,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:34:39,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:39,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:34:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:34:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash 325366236, now seen corresponding path program 1 times [2022-12-14 15:34:39,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:34:39,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132644558] [2022-12-14 15:34:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:39,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:34:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:34:39,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:34:39,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132644558] [2022-12-14 15:34:39,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132644558] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:34:39,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727476700] [2022-12-14 15:34:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:39,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:39,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:34:39,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:34:39,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:34:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:39,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:34:39,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:34:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:34:39,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:34:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:34:39,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727476700] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:34:39,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2140972858] [2022-12-14 15:34:39,368 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:34:39,368 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:34:39,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:34:39,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:34:39,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:34:39,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,831 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:34:39,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:34:39,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:39,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2022-12-14 15:34:40,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:40,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 15:34:40,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:40,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:40,422 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 15:34:40,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 642 treesize of output 641 [2022-12-14 15:34:40,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 15:34:40,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:40,776 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:40,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:40,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:40,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:40,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:40,822 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:40,823 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 110 treesize of output 115 [2022-12-14 15:34:40,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:40,881 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:40,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:40,920 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:40,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:40,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:40,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,002 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:34:41,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:34:41,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,107 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:41,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:41,134 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:41,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:41,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,202 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:34:41,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:34:41,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,270 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:41,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:41,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,297 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:41,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:41,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:41,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,343 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:41,344 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 110 treesize of output 115 [2022-12-14 15:34:41,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,401 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:41,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:41,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,443 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:41,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:41,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,487 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:41,487 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 110 treesize of output 115 [2022-12-14 15:34:41,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,535 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:41,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:41,560 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:41,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:41,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,636 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:34:41,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:34:41,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:41,696 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:41,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:41,710 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:34:41,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:34:41,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:34:41,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:34:41,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 15:34:41,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803768558] [2022-12-14 15:34:41,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:34:41,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:34:41,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:34:41,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:34:41,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:34:41,941 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-12-14 15:34:41,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:34:41,969 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-12-14 15:34:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:34:41,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 15:34:41,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:34:41,970 INFO L225 Difference]: With dead ends: 40 [2022-12-14 15:34:41,970 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 15:34:41,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:34:41,971 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:34:41,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:34:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 15:34:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 15:34:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:34:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-12-14 15:34:41,974 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 18 [2022-12-14 15:34:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:34:41,974 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-12-14 15:34:41,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-12-14 15:34:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-12-14 15:34:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 15:34:41,974 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:34:41,974 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:34:41,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:34:42,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:42,176 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:34:42,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:34:42,178 INFO L85 PathProgramCache]: Analyzing trace with hash -221533496, now seen corresponding path program 2 times [2022-12-14 15:34:42,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:34:42,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106903499] [2022-12-14 15:34:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:42,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:34:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:34:42,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:34:42,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106903499] [2022-12-14 15:34:42,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106903499] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:34:42,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299495052] [2022-12-14 15:34:42,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:34:42,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:42,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:34:42,360 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:34:42,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:34:42,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:34:42,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:34:42,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:34:42,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:34:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:34:42,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:34:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:34:42,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299495052] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:34:42,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [201839681] [2022-12-14 15:34:42,463 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:34:42,463 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:34:42,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:34:42,464 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:34:42,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:34:42,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,760 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:34:42,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:34:42,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2022-12-14 15:34:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:42,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 15:34:43,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:43,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:43,061 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 15:34:43,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 652 treesize of output 640 [2022-12-14 15:34:43,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 15:34:43,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,238 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:43,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:43,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:43,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,274 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:43,274 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 110 treesize of output 115 [2022-12-14 15:34:43,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,326 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:43,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:43,357 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:43,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:43,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,428 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:34:43,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:34:43,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,496 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:43,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:43,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,519 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:43,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:43,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:43,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,562 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:43,562 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 110 treesize of output 115 [2022-12-14 15:34:43,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,600 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:43,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:43,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,628 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:43,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:43,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:43,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,670 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:43,670 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 110 treesize of output 115 [2022-12-14 15:34:43,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,718 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:43,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:43,758 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:43,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:43,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,831 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:34:43,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:34:43,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,893 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:43,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:43,915 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:43,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:43,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:43,975 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:34:43,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:34:44,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:44,024 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:44,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:44,038 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:34:44,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '563#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:34:44,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:34:44,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:34:44,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 15:34:44,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456711044] [2022-12-14 15:34:44,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:34:44,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:34:44,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:34:44,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:34:44,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:34:44,361 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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) [2022-12-14 15:34:44,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:34:44,431 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2022-12-14 15:34:44,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:34:44,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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) Word has length 21 [2022-12-14 15:34:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:34:44,432 INFO L225 Difference]: With dead ends: 56 [2022-12-14 15:34:44,432 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 15:34:44,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:34:44,433 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:34:44,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:34:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 15:34:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-12-14 15:34:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 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) [2022-12-14 15:34:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-12-14 15:34:44,439 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2022-12-14 15:34:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:34:44,439 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-12-14 15:34:44,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 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) [2022-12-14 15:34:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-12-14 15:34:44,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 15:34:44,439 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:34:44,439 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:34:44,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:34:44,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:44,641 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:34:44,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:34:44,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1604918441, now seen corresponding path program 3 times [2022-12-14 15:34:44,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:34:44,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981646052] [2022-12-14 15:34:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:44,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:34:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:34:44,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:34:44,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981646052] [2022-12-14 15:34:44,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981646052] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:34:44,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956941224] [2022-12-14 15:34:44,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:34:44,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:34:44,816 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:34:44,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:34:44,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:34:44,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:34:44,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:34:44,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:34:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:34:44,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:34:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:34:44,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956941224] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:34:44,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1242737489] [2022-12-14 15:34:44,975 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:34:44,975 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:34:44,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:34:44,976 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:34:44,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:34:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,181 INFO L321 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-12-14 15:34:45,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-12-14 15:34:45,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,485 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:34:45,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:34:45,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 15:34:45,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:45,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:45,734 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 15:34:45,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 642 treesize of output 641 [2022-12-14 15:34:45,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 15:34:46,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,016 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:46,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:46,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:46,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,056 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:46,056 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 110 treesize of output 115 [2022-12-14 15:34:46,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,104 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:46,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:46,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,142 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:46,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:46,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,184 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:46,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2022-12-14 15:34:46,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,232 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:46,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:46,270 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:46,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:46,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,339 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:34:46,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:34:46,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,390 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:46,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:46,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,415 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:46,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:46,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:46,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,456 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:46,456 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 110 treesize of output 115 [2022-12-14 15:34:46,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,506 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:46,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:46,547 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:46,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:46,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,627 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:34:46,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:34:46,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,697 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:46,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:46,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,721 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:46,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:46,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:46,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,763 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:46,763 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 110 treesize of output 115 [2022-12-14 15:34:46,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:46,801 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:46,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:46,816 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:34:47,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '989#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:34:47,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:34:47,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:34:47,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 15:34:47,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268883974] [2022-12-14 15:34:47,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:34:47,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 15:34:47,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:34:47,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 15:34:47,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:34:47,025 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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) [2022-12-14 15:34:47,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:34:47,065 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2022-12-14 15:34:47,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:34:47,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 39 [2022-12-14 15:34:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:34:47,066 INFO L225 Difference]: With dead ends: 82 [2022-12-14 15:34:47,066 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 15:34:47,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 15:34:47,067 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:34:47,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:34:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 15:34:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-12-14 15:34:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:34:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-12-14 15:34:47,072 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 39 [2022-12-14 15:34:47,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:34:47,072 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-12-14 15:34:47,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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) [2022-12-14 15:34:47,072 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-12-14 15:34:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 15:34:47,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:34:47,073 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:34:47,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:34:47,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:47,274 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:34:47,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:34:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1095297751, now seen corresponding path program 4 times [2022-12-14 15:34:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:34:47,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461501309] [2022-12-14 15:34:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:47,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:34:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:34:47,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:34:47,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461501309] [2022-12-14 15:34:47,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461501309] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:34:47,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152586531] [2022-12-14 15:34:47,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:34:47,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:47,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:34:47,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:34:47,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:34:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:47,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:34:47,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:34:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:34:47,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:34:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:34:47,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152586531] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:34:47,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154007945] [2022-12-14 15:34:47,775 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:34:47,775 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:34:47,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:34:47,775 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:34:47,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:34:47,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:47,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:47,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:47,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:47,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:47,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:47,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:48,025 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:34:48,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:34:48,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:48,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:48,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:48,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:48,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:48,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2022-12-14 15:34:48,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:48,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 15:34:48,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:48,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:48,275 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 15:34:48,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 642 treesize of output 641 [2022-12-14 15:34:48,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 15:34:48,583 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:48,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:48,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:48,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:48,633 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:34:48,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:34:48,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:48,694 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:48,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:48,713 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:48,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:48,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:48,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:48,761 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:34:48,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:34:48,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:48,818 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:48,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:48,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:48,843 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:48,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:48,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:48,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:48,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:48,883 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:48,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2022-12-14 15:34:48,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:48,921 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:48,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:48,943 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:48,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:48,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:48,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:49,006 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:34:49,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:34:49,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:49,059 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:49,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:49,082 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:49,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:49,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:49,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:49,143 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:34:49,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:34:49,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:49,201 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:49,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:49,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:49,225 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:49,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:49,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:49,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:49,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:49,263 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:49,263 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 110 treesize of output 115 [2022-12-14 15:34:49,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:49,300 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:49,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:49,314 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:34:49,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1527#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:34:49,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:34:49,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:34:49,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 15:34:49,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714796506] [2022-12-14 15:34:49,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:34:49,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 15:34:49,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:34:49,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 15:34:49,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 15:34:49,515 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 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) [2022-12-14 15:34:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:34:49,564 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2022-12-14 15:34:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 15:34:49,565 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 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 45 [2022-12-14 15:34:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:34:49,565 INFO L225 Difference]: With dead ends: 94 [2022-12-14 15:34:49,566 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 15:34:49,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 15:34:49,567 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:34:49,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:34:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 15:34:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-12-14 15:34:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:34:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-12-14 15:34:49,572 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 45 [2022-12-14 15:34:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:34:49,572 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-12-14 15:34:49,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 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) [2022-12-14 15:34:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-12-14 15:34:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 15:34:49,574 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:34:49,574 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:34:49,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 15:34:49,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:49,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:34:49,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:34:49,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1075452375, now seen corresponding path program 5 times [2022-12-14 15:34:49,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:34:49,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809372189] [2022-12-14 15:34:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:49,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:34:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 15:34:50,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:34:50,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809372189] [2022-12-14 15:34:50,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809372189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:34:50,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887230352] [2022-12-14 15:34:50,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:34:50,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:50,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:34:50,317 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:34:50,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:34:50,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:34:50,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:34:50,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 15:34:50,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:34:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-12-14 15:34:50,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:34:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-12-14 15:34:50,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887230352] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:34:50,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [498127592] [2022-12-14 15:34:50,711 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:34:50,711 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:34:50,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:34:50,712 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:34:50,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:34:50,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:50,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:50,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:50,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:50,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:50,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:50,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:50,923 INFO L321 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-12-14 15:34:50,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-12-14 15:34:50,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:50,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:50,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:50,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:50,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:50,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:50,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:51,200 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:34:51,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:34:51,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:51,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 15:34:51,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:51,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:51,463 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 15:34:51,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 642 treesize of output 641 [2022-12-14 15:34:51,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 15:34:51,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:51,760 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:51,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:51,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:51,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:51,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:51,793 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:51,794 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 110 treesize of output 115 [2022-12-14 15:34:51,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:51,836 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:51,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:51,868 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:51,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:51,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:51,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:51,924 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:34:51,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:34:51,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:51,970 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:51,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:51,989 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:51,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:52,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:52,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:52,056 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:34:52,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:34:52,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:52,128 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:52,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:52,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:52,148 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:52,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:52,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:52,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:52,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:52,182 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:52,183 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 110 treesize of output 115 [2022-12-14 15:34:52,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:52,223 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:52,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:52,265 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:52,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:52,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:52,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:52,344 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:34:52,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:34:52,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:52,410 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:52,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:52,431 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:52,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:52,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:52,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:52,496 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:34:52,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:34:52,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:52,558 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:52,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:52,577 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:34:52,916 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2195#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:34:52,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:34:52,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:34:52,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-12-14 15:34:52,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975257177] [2022-12-14 15:34:52,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:34:52,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 15:34:52,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:34:52,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 15:34:52,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 15:34:52,918 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:34:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:34:53,066 INFO L93 Difference]: Finished difference Result 131 states and 181 transitions. [2022-12-14 15:34:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 15:34:53,067 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 15:34:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:34:53,068 INFO L225 Difference]: With dead ends: 131 [2022-12-14 15:34:53,068 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 15:34:53,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 15:34:53,070 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:34:53,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:34:53,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 15:34:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-12-14 15:34:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 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) [2022-12-14 15:34:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2022-12-14 15:34:53,075 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 57 [2022-12-14 15:34:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:34:53,075 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2022-12-14 15:34:53,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:34:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2022-12-14 15:34:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 15:34:53,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:34:53,077 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:34:53,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 15:34:53,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:53,278 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:34:53,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:34:53,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1309480117, now seen corresponding path program 6 times [2022-12-14 15:34:53,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:34:53,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747720361] [2022-12-14 15:34:53,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:53,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:34:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:34:53,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:34:53,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747720361] [2022-12-14 15:34:53,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747720361] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:34:53,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852254221] [2022-12-14 15:34:53,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:34:53,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:53,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:34:53,881 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:34:53,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:34:54,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:34:54,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:34:54,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 15:34:54,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:34:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:34:54,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:34:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:34:54,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852254221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:34:54,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2020909419] [2022-12-14 15:34:54,588 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:34:54,588 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:34:54,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:34:54,589 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:34:54,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:34:54,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:54,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:54,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:54,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:54,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:54,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:54,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:54,821 INFO L321 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-12-14 15:34:54,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-12-14 15:34:54,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:54,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:54,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:54,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:54,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:54,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:54,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:55,096 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:34:55,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:34:55,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:55,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 15:34:55,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:55,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:55,353 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 15:34:55,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 652 treesize of output 640 [2022-12-14 15:34:55,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 15:34:55,525 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:55,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:55,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:55,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:55,580 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:34:55,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:34:55,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:55,628 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:55,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:55,647 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:55,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:55,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:55,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:55,707 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:34:55,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:34:55,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:55,757 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:55,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:55,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:55,776 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:55,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:55,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:55,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:55,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:55,812 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:55,812 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 110 treesize of output 115 [2022-12-14 15:34:55,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:55,857 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:55,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:55,881 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:55,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:55,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:55,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:55,938 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:34:55,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:34:55,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:56,000 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:56,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:56,022 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:34:56,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:34:56,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:56,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:56,082 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:34:56,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:34:56,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:56,131 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:56,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:56,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:56,156 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:56,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:56,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:34:56,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:56,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:56,199 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:34:56,200 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 110 treesize of output 115 [2022-12-14 15:34:56,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:34:56,236 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:34:56,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:34:56,247 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:34:56,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3249#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:34:56,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:34:56,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:34:56,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-12-14 15:34:56,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679259604] [2022-12-14 15:34:56,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:34:56,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 15:34:56,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:34:56,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 15:34:56,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 15:34:56,616 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 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) [2022-12-14 15:34:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:34:56,699 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2022-12-14 15:34:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 15:34:56,700 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 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 94 [2022-12-14 15:34:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:34:56,701 INFO L225 Difference]: With dead ends: 192 [2022-12-14 15:34:56,701 INFO L226 Difference]: Without dead ends: 121 [2022-12-14 15:34:56,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 15:34:56,703 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:34:56,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:34:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-14 15:34:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-12-14 15:34:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 120 states have internal predecessors, (128), 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) [2022-12-14 15:34:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2022-12-14 15:34:56,713 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 94 [2022-12-14 15:34:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:34:56,713 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2022-12-14 15:34:56,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 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) [2022-12-14 15:34:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2022-12-14 15:34:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-14 15:34:56,715 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:34:56,715 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:34:56,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:34:56,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 15:34:56,917 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:34:56,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:34:56,918 INFO L85 PathProgramCache]: Analyzing trace with hash 341818807, now seen corresponding path program 7 times [2022-12-14 15:34:56,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:34:56,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935374908] [2022-12-14 15:34:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:34:56,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:34:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:34:58,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:34:58,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935374908] [2022-12-14 15:34:58,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935374908] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:34:58,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201413641] [2022-12-14 15:34:58,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:34:58,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:34:58,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:34:58,724 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:34:58,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:34:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:34:58,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 15:34:58,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:34:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:34:59,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:35:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:35:01,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201413641] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:35:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1397194836] [2022-12-14 15:35:01,006 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:35:01,006 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:35:01,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:35:01,007 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:35:01,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:35:01,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,191 INFO L321 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-12-14 15:35:01,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-12-14 15:35:01,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,463 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:35:01,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:35:01,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 15:35:01,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:01,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:01,755 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 15:35:01,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 642 treesize of output 641 [2022-12-14 15:35:02,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 15:35:02,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,068 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:02,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:02,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,105 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:35:02,105 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 110 treesize of output 115 [2022-12-14 15:35:02,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,150 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:02,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:02,188 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:35:02,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:35:02,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,263 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:35:02,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:35:02,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,330 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:02,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:02,351 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:35:02,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:35:02,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,417 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:35:02,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:35:02,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,463 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:02,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:02,480 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:35:02,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:35:02,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,547 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:35:02,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:35:02,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,617 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:02,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:02,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,642 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:02,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:02,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,679 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:35:02,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2022-12-14 15:35:02,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,719 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:02,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:02,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,745 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:02,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:02,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:02,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,782 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:35:02,783 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 110 treesize of output 115 [2022-12-14 15:35:02,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:02,820 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:02,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:02,847 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:35:03,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4675#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:35:03,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:35:03,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:35:03,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-12-14 15:35:03,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294796611] [2022-12-14 15:35:03,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:35:03,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-14 15:35:03,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:35:03,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-14 15:35:03,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 15:35:03,264 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 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) [2022-12-14 15:35:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:35:03,389 INFO L93 Difference]: Finished difference Result 242 states and 305 transitions. [2022-12-14 15:35:03,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 15:35:03,389 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 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 119 [2022-12-14 15:35:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:35:03,391 INFO L225 Difference]: With dead ends: 242 [2022-12-14 15:35:03,391 INFO L226 Difference]: Without dead ends: 171 [2022-12-14 15:35:03,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 15:35:03,395 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:35:03,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:35:03,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-12-14 15:35:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-12-14 15:35:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0470588235294118) internal successors, (178), 170 states have internal predecessors, (178), 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) [2022-12-14 15:35:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 178 transitions. [2022-12-14 15:35:03,402 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 178 transitions. Word has length 119 [2022-12-14 15:35:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:35:03,402 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 178 transitions. [2022-12-14 15:35:03,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 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) [2022-12-14 15:35:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 178 transitions. [2022-12-14 15:35:03,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 15:35:03,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:35:03,404 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:35:03,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:35:03,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 15:35:03,606 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:35:03,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:35:03,607 INFO L85 PathProgramCache]: Analyzing trace with hash 500636727, now seen corresponding path program 8 times [2022-12-14 15:35:03,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:35:03,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746199472] [2022-12-14 15:35:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:03,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:35:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-12-14 15:35:08,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:35:08,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746199472] [2022-12-14 15:35:08,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746199472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:35:08,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506256039] [2022-12-14 15:35:08,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:35:08,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:35:08,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:35:08,616 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:35:08,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:35:13,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 15:35:13,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:35:13,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 15:35:13,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:35:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5126 trivial. 0 not checked. [2022-12-14 15:35:14,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:35:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5126 trivial. 0 not checked. [2022-12-14 15:35:14,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506256039] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:35:14,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [32326554] [2022-12-14 15:35:14,674 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:35:14,674 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:35:14,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:35:14,674 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:35:14,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:35:14,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,930 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:35:14,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:35:14,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:14,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2022-12-14 15:35:15,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:15,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 15:35:15,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:15,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:15,209 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 15:35:15,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 652 treesize of output 640 [2022-12-14 15:35:15,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 15:35:15,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,395 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:15,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:15,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:15,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,428 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:35:15,428 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 110 treesize of output 115 [2022-12-14 15:35:15,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,476 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:15,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:15,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,509 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:15,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:15,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,545 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:35:15,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2022-12-14 15:35:15,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,581 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:15,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:15,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,626 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:15,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:15,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:15,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,657 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:35:15,657 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 110 treesize of output 115 [2022-12-14 15:35:15,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,695 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:15,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:15,714 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:35:15,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:35:15,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,761 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:35:15,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:35:15,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,808 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:15,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:15,828 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:35:15,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:35:15,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,878 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:35:15,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:35:15,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,935 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:15,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:15,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,966 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:15,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:15,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:15,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:15,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:16,000 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:35:16,000 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 110 treesize of output 115 [2022-12-14 15:35:16,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:16,032 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:16,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:16,044 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:35:16,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6623#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:35:16,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:35:16,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:35:16,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-12-14 15:35:16,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204847140] [2022-12-14 15:35:16,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:35:16,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-12-14 15:35:16,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:35:16,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-12-14 15:35:16,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 15:35:16,743 INFO L87 Difference]: Start difference. First operand 171 states and 178 transitions. Second operand has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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) [2022-12-14 15:35:17,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:35:17,093 INFO L93 Difference]: Finished difference Result 315 states and 401 transitions. [2022-12-14 15:35:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-12-14 15:35:17,094 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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 169 [2022-12-14 15:35:17,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:35:17,095 INFO L225 Difference]: With dead ends: 315 [2022-12-14 15:35:17,095 INFO L226 Difference]: Without dead ends: 244 [2022-12-14 15:35:17,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 15:35:17,098 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:35:17,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:35:17,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-14 15:35:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-12-14 15:35:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.0329218106995885) internal successors, (251), 243 states have internal predecessors, (251), 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) [2022-12-14 15:35:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 251 transitions. [2022-12-14 15:35:17,106 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 251 transitions. Word has length 169 [2022-12-14 15:35:17,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:35:17,106 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 251 transitions. [2022-12-14 15:35:17,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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) [2022-12-14 15:35:17,107 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 251 transitions. [2022-12-14 15:35:17,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-12-14 15:35:17,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:35:17,108 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:35:17,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:35:17,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:35:17,309 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:35:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:35:17,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1285138187, now seen corresponding path program 9 times [2022-12-14 15:35:17,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:35:17,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243838343] [2022-12-14 15:35:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:17,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:35:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:35:22,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:35:22,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243838343] [2022-12-14 15:35:22,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243838343] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:35:22,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597047554] [2022-12-14 15:35:22,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:35:22,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:35:22,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:35:22,441 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:35:22,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:35:22,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:35:22,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:35:22,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1985 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-14 15:35:22,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:35:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:35:22,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:35:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:35:30,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597047554] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:35:30,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [161157217] [2022-12-14 15:35:30,618 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:35:30,618 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:35:30,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:35:30,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:35:30,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:35:30,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:30,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:30,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:30,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:30,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:30,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:30,787 INFO L321 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-12-14 15:35:30,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-12-14 15:35:30,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:30,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:30,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:30,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:30,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:30,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:30,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:31,035 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:35:31,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:35:31,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:31,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 15:35:31,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:31,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:31,261 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 15:35:31,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 652 treesize of output 640 [2022-12-14 15:35:31,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 15:35:31,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,442 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:31,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:31,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:31,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,471 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:35:31,471 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 110 treesize of output 115 [2022-12-14 15:35:31,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,517 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:31,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:31,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,554 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:31,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:31,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:31,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,601 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:35:31,601 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 110 treesize of output 115 [2022-12-14 15:35:31,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,645 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:31,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:31,677 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:35:31,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:35:31,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,730 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:35:31,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:35:31,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,783 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:31,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:31,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,802 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:31,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:31,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:31,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,834 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:35:31,834 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 110 treesize of output 115 [2022-12-14 15:35:31,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,882 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:31,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:31,913 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:35:31,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:35:31,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:31,964 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:35:31,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:35:32,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:32,017 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:32,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:32,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:32,037 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:32,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:32,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:35:32,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:32,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:32,071 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:35:32,071 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 110 treesize of output 115 [2022-12-14 15:35:32,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:35:32,105 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:35:32,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:35:32,117 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:35:32,692 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9381#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:35:32,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:35:32,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:35:32,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-12-14 15:35:32,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849627179] [2022-12-14 15:35:32,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:35:32,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-12-14 15:35:32,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:35:32,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-12-14 15:35:32,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 15:35:32,701 INFO L87 Difference]: Start difference. First operand 244 states and 251 transitions. Second operand has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 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) [2022-12-14 15:35:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:35:33,025 INFO L93 Difference]: Finished difference Result 488 states and 602 transitions. [2022-12-14 15:35:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-12-14 15:35:33,026 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 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 242 [2022-12-14 15:35:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:35:33,027 INFO L225 Difference]: With dead ends: 488 [2022-12-14 15:35:33,027 INFO L226 Difference]: Without dead ends: 345 [2022-12-14 15:35:33,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 619 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 15:35:33,029 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:35:33,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:35:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-12-14 15:35:33,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-12-14 15:35:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.0232558139534884) internal successors, (352), 344 states have internal predecessors, (352), 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) [2022-12-14 15:35:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 352 transitions. [2022-12-14 15:35:33,039 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 352 transitions. Word has length 242 [2022-12-14 15:35:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:35:33,039 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 352 transitions. [2022-12-14 15:35:33,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 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) [2022-12-14 15:35:33,039 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 352 transitions. [2022-12-14 15:35:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-12-14 15:35:33,042 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:35:33,042 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:35:33,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 15:35:33,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 15:35:33,243 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:35:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:35:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash 839486071, now seen corresponding path program 10 times [2022-12-14 15:35:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:35:33,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567866987] [2022-12-14 15:35:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:33,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:35:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:35:52,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:35:52,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567866987] [2022-12-14 15:35:52,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567866987] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:35:52,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426226440] [2022-12-14 15:35:52,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 15:35:52,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:35:52,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:35:52,240 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:35:52,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:35:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:52,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 202 conjunts are in the unsatisfiable core [2022-12-14 15:35:52,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:35:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:35:52,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:36:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:36:24,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426226440] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:36:24,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [384199511] [2022-12-14 15:36:24,105 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:36:24,105 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:36:24,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:36:24,105 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:36:24,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:36:24,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,344 INFO L321 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-12-14 15:36:24,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-12-14 15:36:24,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,633 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:36:24,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:36:24,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 15:36:24,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:24,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:24,891 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 15:36:24,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 642 treesize of output 641 [2022-12-14 15:36:25,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 15:36:25,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,208 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:36:25,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:36:25,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:25,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,261 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:36:25,261 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 110 treesize of output 115 [2022-12-14 15:36:25,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,310 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:36:25,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:36:25,337 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:36:25,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:36:25,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,387 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:36:25,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:36:25,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,443 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:36:25,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:36:25,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,461 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:36:25,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:36:25,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:25,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,489 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:36:25,489 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 110 treesize of output 115 [2022-12-14 15:36:25,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,517 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:36:25,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:36:25,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,532 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:36:25,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:36:25,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:36:25,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,568 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:36:25,568 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 110 treesize of output 115 [2022-12-14 15:36:25,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,603 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:36:25,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:36:25,630 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:36:25,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:36:25,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,678 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:36:25,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:36:25,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,727 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:36:25,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:36:25,745 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:36:25,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:36:25,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,791 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:36:25,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:36:25,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:36:25,861 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:36:25,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:36:25,872 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:36:26,717 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13495#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:36:26,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:36:26,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:36:26,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-12-14 15:36:26,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321270124] [2022-12-14 15:36:26,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:36:26,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-12-14 15:36:26,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:36:26,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-12-14 15:36:26,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 15:36:26,741 INFO L87 Difference]: Start difference. First operand 345 states and 352 transitions. Second operand has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 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) [2022-12-14 15:36:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:36:28,897 INFO L93 Difference]: Finished difference Result 690 states and 905 transitions. [2022-12-14 15:36:28,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-12-14 15:36:28,898 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 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 343 [2022-12-14 15:36:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:36:28,900 INFO L225 Difference]: With dead ends: 690 [2022-12-14 15:36:28,900 INFO L226 Difference]: Without dead ends: 547 [2022-12-14 15:36:28,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1229 GetRequests, 821 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 15:36:28,909 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:36:28,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:36:28,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-12-14 15:36:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2022-12-14 15:36:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.0146520146520146) internal successors, (554), 546 states have internal predecessors, (554), 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) [2022-12-14 15:36:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 554 transitions. [2022-12-14 15:36:28,930 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 554 transitions. Word has length 343 [2022-12-14 15:36:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:36:28,930 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 554 transitions. [2022-12-14 15:36:28,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 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) [2022-12-14 15:36:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 554 transitions. [2022-12-14 15:36:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-12-14 15:36:28,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:36:28,934 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:36:28,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 15:36:29,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:36:29,136 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:36:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:36:29,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2113247497, now seen corresponding path program 11 times [2022-12-14 15:36:29,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:36:29,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855434602] [2022-12-14 15:36:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:36:29,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:36:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 82521 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-12-14 15:37:46,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:37:46,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855434602] [2022-12-14 15:37:46,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855434602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:37:46,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365369016] [2022-12-14 15:37:46,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:37:46,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:37:46,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:37:46,011 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:37:46,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:43:05,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 15:43:05,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:43:05,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 104 conjunts are in the unsatisfiable core [2022-12-14 15:43:05,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:43:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 82521 backedges. 446 proven. 253 refuted. 0 times theorem prover too weak. 81822 trivial. 0 not checked. [2022-12-14 15:43:08,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:43:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 82521 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 82069 trivial. 0 not checked. [2022-12-14 15:43:11,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365369016] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:43:11,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [326396453] [2022-12-14 15:43:11,414 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:43:11,414 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:43:11,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:43:11,415 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:43:11,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:43:11,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,623 INFO L321 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2022-12-14 15:43:11,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2022-12-14 15:43:11,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,841 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:43:11,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:43:11,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:11,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 15:43:12,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:12,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,077 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 15:43:12,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 642 treesize of output 641 [2022-12-14 15:43:12,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 15:43:12,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,385 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:43:12,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:43:12,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:12,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,417 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:43:12,417 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 110 treesize of output 115 [2022-12-14 15:43:12,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,456 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:43:12,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:43:12,487 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:43:12,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:43:12,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,554 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:43:12,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:43:12,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,602 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:43:12,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:43:12,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,622 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:43:12,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:43:12,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:12,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,653 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:43:12,654 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 110 treesize of output 115 [2022-12-14 15:43:12,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,683 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:43:12,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:43:12,701 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:43:12,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:43:12,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,753 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 15:43:12,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2022-12-14 15:43:12,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,812 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:43:12,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:43:12,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,828 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:43:12,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:43:12,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:43:12,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,860 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:43:12,860 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 110 treesize of output 115 [2022-12-14 15:43:12,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,892 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:43:12,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:43:12,916 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:43:12,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:43:12,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:12,974 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:43:12,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:43:13,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:43:13,028 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:43:13,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:43:13,040 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:43:14,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19677#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:43:14,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:43:14,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:43:14,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 27, 25] total 453 [2022-12-14 15:43:14,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47880133] [2022-12-14 15:43:14,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:43:14,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 453 states [2022-12-14 15:43:14,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:43:14,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 453 interpolants. [2022-12-14 15:43:14,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83398, Invalid=125908, Unknown=0, NotChecked=0, Total=209306 [2022-12-14 15:43:14,691 INFO L87 Difference]: Start difference. First operand 547 states and 554 transitions. Second operand has 453 states, 453 states have (on average 1.086092715231788) internal successors, (492), 453 states have internal predecessors, (492), 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) [2022-12-14 15:43:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:43:24,601 INFO L93 Difference]: Finished difference Result 835 states and 993 transitions. [2022-12-14 15:43:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 454 states. [2022-12-14 15:43:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 453 states, 453 states have (on average 1.086092715231788) internal successors, (492), 453 states have internal predecessors, (492), 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 545 [2022-12-14 15:43:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:43:24,604 INFO L225 Difference]: With dead ends: 835 [2022-12-14 15:43:24,604 INFO L226 Difference]: Without dead ends: 692 [2022-12-14 15:43:24,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2132 GetRequests, 1628 SyntacticMatches, 0 SemanticMatches, 504 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23043 ImplicationChecksByTransitivity, 53.1s TimeCoverageRelationStatistics Valid=85793, Invalid=169737, Unknown=0, NotChecked=0, Total=255530 [2022-12-14 15:43:24,614 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 330 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 1131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1131 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:43:24,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 48 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1131 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 15:43:24,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-12-14 15:43:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 692. [2022-12-14 15:43:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.0115774240231548) internal successors, (699), 691 states have internal predecessors, (699), 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) [2022-12-14 15:43:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 699 transitions. [2022-12-14 15:43:24,633 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 699 transitions. Word has length 545 [2022-12-14 15:43:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:43:24,634 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 699 transitions. [2022-12-14 15:43:24,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 453 states, 453 states have (on average 1.086092715231788) internal successors, (492), 453 states have internal predecessors, (492), 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) [2022-12-14 15:43:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 699 transitions. [2022-12-14 15:43:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2022-12-14 15:43:24,637 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:43:24,637 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:43:24,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 15:43:24,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 15:43:24,838 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:43:24,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:43:24,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1734738059, now seen corresponding path program 12 times [2022-12-14 15:43:24,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:43:24,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306313344] [2022-12-14 15:43:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:43:24,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:43:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:44:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 87892 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 6486 trivial. 0 not checked. [2022-12-14 15:44:54,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:44:54,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306313344] [2022-12-14 15:44:54,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306313344] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:44:54,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931176016] [2022-12-14 15:44:54,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 15:44:54,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:44:54,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:44:54,941 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:44:54,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:44:56,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 15:44:56,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:44:56,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 5729 conjuncts, 405 conjunts are in the unsatisfiable core [2022-12-14 15:44:56,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:44:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 87892 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 6486 trivial. 0 not checked. [2022-12-14 15:44:56,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:47:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 87892 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 6486 trivial. 0 not checked. [2022-12-14 15:47:01,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931176016] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:47:01,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425129894] [2022-12-14 15:47:01,682 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 15:47:01,682 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:47:01,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:47:01,682 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:47:01,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:47:01,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:01,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:01,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:01,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:01,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:01,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:01,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:01,977 INFO L321 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2022-12-14 15:47:01,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2022-12-14 15:47:02,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:02,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:02,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:02,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:02,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:02,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:02,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:02,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2022-12-14 15:47:02,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:02,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 15:47:02,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:02,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:02,235 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 15:47:02,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 652 treesize of output 640 [2022-12-14 15:47:02,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 15:47:02,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,412 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:02,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:02,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:02,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,444 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:47:02,445 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 110 treesize of output 115 [2022-12-14 15:47:02,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,484 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:02,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:02,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,520 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:02,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:02,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 15:47:02,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,557 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 15:47:02,557 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 110 treesize of output 115 [2022-12-14 15:47:02,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,600 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:02,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:02,634 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:47:02,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:47:02,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,689 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:47:02,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:47:02,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,737 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:02,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:02,758 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:47:02,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:47:02,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,819 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:47:02,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:47:02,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,908 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:02,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:02,931 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:47:02,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:47:02,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:02,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:03,022 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:47:03,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:47:03,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:03,080 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:03,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:03,100 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 15:47:03,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 15:47:03,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:03,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:03,162 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 15:47:03,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2022-12-14 15:47:03,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 15:47:03,220 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 15:47:03,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 15:47:03,234 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:47:05,068 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27810#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:47:05,068 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:47:05,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:47:05,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-12-14 15:47:05,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800258539] [2022-12-14 15:47:05,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:47:05,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-12-14 15:47:05,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:47:05,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-12-14 15:47:05,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-12-14 15:47:05,148 INFO L87 Difference]: Start difference. First operand 692 states and 699 transitions. Second operand has 811 states, 811 states have (on average 1.0197287299630087) internal successors, (827), 810 states have internal predecessors, (827), 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) [2022-12-14 15:47:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:47:15,564 INFO L93 Difference]: Finished difference Result 1384 states and 1802 transitions. [2022-12-14 15:47:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-12-14 15:47:15,566 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0197287299630087) internal successors, (827), 810 states have internal predecessors, (827), 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 690 [2022-12-14 15:47:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:47:15,568 INFO L225 Difference]: With dead ends: 1384 [2022-12-14 15:47:15,568 INFO L226 Difference]: Without dead ends: 1097 [2022-12-14 15:47:15,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2473 GetRequests, 1659 SyntacticMatches, 0 SemanticMatches, 814 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7672 ImplicationChecksByTransitivity, 168.4s TimeCoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-12-14 15:47:15,594 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:47:15,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 15:47:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-12-14 15:47:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1097. [2022-12-14 15:47:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1096 states have (on average 1.0072992700729928) internal successors, (1104), 1096 states have internal predecessors, (1104), 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) [2022-12-14 15:47:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1104 transitions. [2022-12-14 15:47:15,624 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1104 transitions. Word has length 690 [2022-12-14 15:47:15,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:47:15,624 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1104 transitions. [2022-12-14 15:47:15,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0197287299630087) internal successors, (827), 810 states have internal predecessors, (827), 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) [2022-12-14 15:47:15,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1104 transitions. [2022-12-14 15:47:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2022-12-14 15:47:15,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:47:15,631 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:47:15,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:47:15,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbd2b41b-3ef6-4738-bb8a-098fe3cab860/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 15:47:15,832 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:47:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:47:15,834 INFO L85 PathProgramCache]: Analyzing trace with hash 989347831, now seen corresponding path program 13 times [2022-12-14 15:47:15,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:47:15,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115799361] [2022-12-14 15:47:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:47:15,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:47:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat