./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-2-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-2-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d9e382438d8fbe8dfce0f613a239dc56836f436a035cb511dde070c4306eb1f9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:42:14,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:42:14,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:42:14,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:42:14,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:42:14,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:42:14,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:42:14,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:42:14,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:42:14,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:42:14,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:42:14,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:42:14,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:42:14,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:42:14,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:42:14,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:42:14,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:42:14,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:42:14,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:42:14,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:42:14,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:42:14,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:42:14,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:42:14,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:42:14,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:42:14,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:42:14,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:42:14,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:42:14,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:42:14,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:42:14,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:42:14,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:42:14,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:42:14,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:42:14,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:42:14,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:42:14,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:42:14,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:42:14,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:42:14,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:42:14,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:42:14,503 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:42:14,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:42:14,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:42:14,545 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:42:14,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:42:14,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:42:14,547 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:42:14,547 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:42:14,547 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:42:14,548 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:42:14,548 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:42:14,549 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:42:14,549 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:42:14,550 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:42:14,550 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:42:14,550 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:42:14,550 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:42:14,551 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:42:14,551 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:42:14,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:42:14,552 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:42:14,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:42:14,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:42:14,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:42:14,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:42:14,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:42:14,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:42:14,554 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:42:14,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:42:14,554 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:42:14,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:42:14,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:42:14,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:42:14,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:42:14,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:42:14,556 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:42:14,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:42:14,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:42:14,557 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:42:14,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:42:14,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:42:14,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:42:14,558 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_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9e382438d8fbe8dfce0f613a239dc56836f436a035cb511dde070c4306eb1f9 [2022-11-22 01:42:14,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:42:14,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:42:14,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:42:14,912 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:42:14,913 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:42:14,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-multidimensional/copy-2-u.c [2022-11-22 01:42:18,119 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:42:18,444 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:42:18,445 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/sv-benchmarks/c/array-multidimensional/copy-2-u.c [2022-11-22 01:42:18,453 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/data/0fadf68c8/c6aae977511640a7bc268b24e27e2437/FLAGf091eb23c [2022-11-22 01:42:18,476 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/data/0fadf68c8/c6aae977511640a7bc268b24e27e2437 [2022-11-22 01:42:18,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:42:18,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:42:18,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:42:18,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:42:18,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:42:18,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:42:18" (1/1) ... [2022-11-22 01:42:18,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16baab33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18, skipping insertion in model container [2022-11-22 01:42:18,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:42:18" (1/1) ... [2022-11-22 01:42:18,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:42:18,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:42:18,745 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_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/sv-benchmarks/c/array-multidimensional/copy-2-u.c[320,333] [2022-11-22 01:42:18,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:42:18,795 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:42:18,812 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_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/sv-benchmarks/c/array-multidimensional/copy-2-u.c[320,333] [2022-11-22 01:42:18,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:42:18,856 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:42:18,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18 WrapperNode [2022-11-22 01:42:18,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:42:18,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:42:18,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:42:18,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:42:18,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18" (1/1) ... [2022-11-22 01:42:18,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18" (1/1) ... [2022-11-22 01:42:18,915 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2022-11-22 01:42:18,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:42:18,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:42:18,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:42:18,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:42:18,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18" (1/1) ... [2022-11-22 01:42:18,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18" (1/1) ... [2022-11-22 01:42:18,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18" (1/1) ... [2022-11-22 01:42:18,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18" (1/1) ... [2022-11-22 01:42:18,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18" (1/1) ... [2022-11-22 01:42:18,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18" (1/1) ... [2022-11-22 01:42:18,967 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18" (1/1) ... [2022-11-22 01:42:18,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18" (1/1) ... [2022-11-22 01:42:18,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:42:18,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:42:18,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:42:18,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:42:18,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18" (1/1) ... [2022-11-22 01:42:18,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:42:18,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:19,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:42:19,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:42:19,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:42:19,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:42:19,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:42:19,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:42:19,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:42:19,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:42:19,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:42:19,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:42:19,152 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:42:19,154 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:42:19,400 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:42:19,476 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:42:19,476 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-22 01:42:19,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:42:19 BoogieIcfgContainer [2022-11-22 01:42:19,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:42:19,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:42:19,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:42:19,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:42:19,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:42:18" (1/3) ... [2022-11-22 01:42:19,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cdfa45d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:42:19, skipping insertion in model container [2022-11-22 01:42:19,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:42:18" (2/3) ... [2022-11-22 01:42:19,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cdfa45d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:42:19, skipping insertion in model container [2022-11-22 01:42:19,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:42:19" (3/3) ... [2022-11-22 01:42:19,508 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-2-u.c [2022-11-22 01:42:19,546 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:42:19,547 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:42:19,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:42:19,637 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;@383ce22, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:42:19,645 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:42:19,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:42:19,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:19,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:19,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:42:19,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:19,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1209143189, now seen corresponding path program 1 times [2022-11-22 01:42:19,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:19,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481825708] [2022-11-22 01:42:19,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:19,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:19,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:42:19,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303119821] [2022-11-22 01:42:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:19,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:19,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:19,846 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:42:19,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:42:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:19,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:42:19,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:42:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:42:20,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:42:20,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:20,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481825708] [2022-11-22 01:42:20,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:42:20,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303119821] [2022-11-22 01:42:20,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303119821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:42:20,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:42:20,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:42:20,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028013493] [2022-11-22 01:42:20,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:42:20,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:42:20,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:20,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:42:20,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:42:20,132 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:20,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:20,206 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-11-22 01:42:20,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:42:20,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 01:42:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:20,219 INFO L225 Difference]: With dead ends: 23 [2022-11-22 01:42:20,220 INFO L226 Difference]: Without dead ends: 13 [2022-11-22 01:42:20,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:42:20,230 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:20,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:42:20,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-22 01:42:20,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-22 01:42:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-22 01:42:20,275 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2022-11-22 01:42:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:20,276 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-22 01:42:20,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-22 01:42:20,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:42:20,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:20,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:20,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:42:20,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 01:42:20,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:42:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash 993204907, now seen corresponding path program 1 times [2022-11-22 01:42:20,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:20,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561555079] [2022-11-22 01:42:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:20,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:20,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:42:20,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719901424] [2022-11-22 01:42:20,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:20,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:20,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:20,501 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:42:20,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:42:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:20,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:42:20,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:42:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:42:20,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:42:20,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:20,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561555079] [2022-11-22 01:42:20,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:42:20,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719901424] [2022-11-22 01:42:20,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719901424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:42:20,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:42:20,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:42:20,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876659002] [2022-11-22 01:42:20,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:42:20,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:42:20,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:20,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:42:20,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:42:20,653 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:20,730 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-11-22 01:42:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:42:20,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:42:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:20,733 INFO L225 Difference]: With dead ends: 31 [2022-11-22 01:42:20,734 INFO L226 Difference]: Without dead ends: 21 [2022-11-22 01:42:20,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:42:20,737 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:20,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 6 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:42:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-22 01:42:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2022-11-22 01:42:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-11-22 01:42:20,745 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2022-11-22 01:42:20,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:20,745 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-11-22 01:42:20,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-11-22 01:42:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:42:20,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:20,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:20,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:42:20,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:20,953 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:42:20,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:20,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2088403375, now seen corresponding path program 1 times [2022-11-22 01:42:20,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:20,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457849611] [2022-11-22 01:42:20,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:20,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:20,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:42:20,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688725245] [2022-11-22 01:42:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:20,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:20,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:20,967 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:42:20,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:42:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:21,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:42:21,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:42:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:42:21,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:42:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:42:21,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:21,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457849611] [2022-11-22 01:42:21,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:42:21,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688725245] [2022-11-22 01:42:21,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688725245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:42:21,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [388164334] [2022-11-22 01:42:21,218 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 01:42:21,218 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:42:21,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:42:21,229 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:42:21,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:42:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:21,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:21,431 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-11-22 01:42:21,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 01:42:21,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:21,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:21,599 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:42:21,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:42:21,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:21,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-22 01:42:22,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:22,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:22,460 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-22 01:42:22,461 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 345 treesize of output 328 [2022-11-22 01:42:22,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:42:22,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:42:23,040 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:42:29,456 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 105 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:42:29,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [388164334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:42:29,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:42:29,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2022-11-22 01:42:29,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000824216] [2022-11-22 01:42:29,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:42:29,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:42:29,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:29,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:42:29,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:42:29,555 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:33,942 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-22 01:42:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:42:33,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 01:42:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:33,943 INFO L225 Difference]: With dead ends: 31 [2022-11-22 01:42:33,943 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 01:42:33,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:42:33,945 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:33,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:42:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 01:42:33,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2022-11-22 01:42:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-22 01:42:33,960 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2022-11-22 01:42:33,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:33,961 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-22 01:42:33,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-22 01:42:33,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:42:33,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:33,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:33,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:42:34,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:34,169 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:42:34,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:34,170 INFO L85 PathProgramCache]: Analyzing trace with hash 280877451, now seen corresponding path program 1 times [2022-11-22 01:42:34,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:34,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000401137] [2022-11-22 01:42:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:34,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:34,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:42:34,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576278702] [2022-11-22 01:42:34,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:34,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:34,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:34,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:42:34,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:42:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:42:34,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:42:34,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:42:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:42:34,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:42:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:42:34,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:34,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000401137] [2022-11-22 01:42:34,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:42:34,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576278702] [2022-11-22 01:42:34,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576278702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:42:34,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1025042651] [2022-11-22 01:42:34,347 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:42:34,348 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:42:34,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:42:34,348 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:42:34,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:42:34,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:34,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:34,470 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:42:34,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:42:34,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:34,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-11-22 01:42:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:34,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-22 01:42:34,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:34,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:34,912 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-22 01:42:34,913 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 337 treesize of output 330 [2022-11-22 01:42:35,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:42:35,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:42:35,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:35,337 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 01:42:35,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 01:42:35,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:35,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:35,474 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-11-22 01:42:35,475 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 110 treesize of output 129 [2022-11-22 01:42:35,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:35,624 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:42:35,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:42:35,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:35,713 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:42:35,713 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 35 treesize of output 35 [2022-11-22 01:42:35,782 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:42:43,932 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 105 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:42:44,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '426#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:42:44,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:42:44,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:42:44,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-22 01:42:44,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964843322] [2022-11-22 01:42:44,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:42:44,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:42:44,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:42:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:42:44,222 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:44,366 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-11-22 01:42:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:42:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 01:42:44,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:44,368 INFO L225 Difference]: With dead ends: 52 [2022-11-22 01:42:44,368 INFO L226 Difference]: Without dead ends: 38 [2022-11-22 01:42:44,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:42:44,370 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:44,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 12 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:42:44,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-22 01:42:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-11-22 01:42:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-22 01:42:44,389 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 13 [2022-11-22 01:42:44,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:44,389 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-22 01:42:44,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:44,390 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-22 01:42:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:42:44,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:44,391 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:44,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:42:44,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:44,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:42:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:44,599 INFO L85 PathProgramCache]: Analyzing trace with hash -406304509, now seen corresponding path program 2 times [2022-11-22 01:42:44,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:44,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120975663] [2022-11-22 01:42:44,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:44,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:44,612 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:42:44,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660437758] [2022-11-22 01:42:44,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:42:44,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:44,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:44,615 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:42:44,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:42:44,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:42:44,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:42:44,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:42:44,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:42:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 01:42:44,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:42:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 01:42:44,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:44,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120975663] [2022-11-22 01:42:44,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:42:44,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660437758] [2022-11-22 01:42:44,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660437758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:42:44,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043613096] [2022-11-22 01:42:44,831 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:42:44,831 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:42:44,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:42:44,832 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:42:44,832 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:42:44,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:44,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:44,971 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:42:44,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:42:44,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:44,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:44,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-11-22 01:42:45,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:45,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-22 01:42:45,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:45,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:45,353 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-22 01:42:45,354 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 345 treesize of output 328 [2022-11-22 01:42:45,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:42:45,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:42:45,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:45,691 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 01:42:45,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 01:42:45,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:45,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:45,861 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-11-22 01:42:45,862 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 110 treesize of output 129 [2022-11-22 01:42:46,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:46,016 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:42:46,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:42:46,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:46,090 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:42:46,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:42:46,159 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:42:54,960 WARN L233 SmtUtils]: Spent 8.68s on a formula simplification. DAG size of input: 105 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:42:55,281 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '692#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:42:55,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:42:55,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:42:55,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-22 01:42:55,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231302815] [2022-11-22 01:42:55,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:42:55,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:42:55,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:42:55,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:42:55,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:42:55,283 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:55,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:42:55,372 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-11-22 01:42:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:42:55,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-22 01:42:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:42:55,375 INFO L225 Difference]: With dead ends: 72 [2022-11-22 01:42:55,376 INFO L226 Difference]: Without dead ends: 49 [2022-11-22 01:42:55,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:42:55,377 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:42:55,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:42:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-22 01:42:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-22 01:42:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-11-22 01:42:55,419 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19 [2022-11-22 01:42:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:42:55,420 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-11-22 01:42:55,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:42:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-11-22 01:42:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:42:55,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:42:55,422 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:42:55,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:42:55,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:55,629 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:42:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:42:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2101584963, now seen corresponding path program 3 times [2022-11-22 01:42:55,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:42:55,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039996405] [2022-11-22 01:42:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:42:55,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:42:55,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:42:55,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054627768] [2022-11-22 01:42:55,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:42:55,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:42:55,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:42:55,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:42:55,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:42:55,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:42:55,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:42:55,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:42:55,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:42:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-22 01:42:55,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:42:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-22 01:42:55,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:42:55,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039996405] [2022-11-22 01:42:55,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:42:55,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054627768] [2022-11-22 01:42:55,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054627768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:42:55,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045874554] [2022-11-22 01:42:55,955 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:42:55,955 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:42:55,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:42:55,956 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:42:55,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:42:55,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:55,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:56,039 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-11-22 01:42:56,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 01:42:56,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:56,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:56,145 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:42:56,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:42:56,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:56,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-22 01:42:56,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:56,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:56,519 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-22 01:42:56,526 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 345 treesize of output 328 [2022-11-22 01:42:56,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:42:56,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:42:56,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:56,859 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:42:56,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:42:56,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:42:56,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:56,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:56,983 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-22 01:42:56,983 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 118 treesize of output 123 [2022-11-22 01:42:57,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:57,047 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:42:57,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:42:57,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:42:57,103 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:42:57,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:42:57,196 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:43:05,851 WARN L233 SmtUtils]: Spent 8.51s on a formula simplification. DAG size of input: 105 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:43:06,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1151#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:43:06,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:43:06,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:43:06,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-22 01:43:06,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727915201] [2022-11-22 01:43:06,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:43:06,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 01:43:06,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:43:06,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 01:43:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:43:06,268 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:06,934 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2022-11-22 01:43:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 01:43:06,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-22 01:43:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:06,938 INFO L225 Difference]: With dead ends: 148 [2022-11-22 01:43:06,938 INFO L226 Difference]: Without dead ends: 132 [2022-11-22 01:43:06,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 01:43:06,940 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:06,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 70 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:43:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-22 01:43:06,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 67. [2022-11-22 01:43:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 66 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:06,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2022-11-22 01:43:06,979 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 37 [2022-11-22 01:43:06,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:06,980 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2022-11-22 01:43:06,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2022-11-22 01:43:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-22 01:43:06,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:06,982 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:43:06,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:07,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 01:43:07,189 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:43:07,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:07,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1621711157, now seen corresponding path program 4 times [2022-11-22 01:43:07,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:43:07,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330271229] [2022-11-22 01:43:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:07,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:43:07,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:43:07,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099518500] [2022-11-22 01:43:07,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:43:07,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:43:07,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:43:07,214 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:43:07,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:43:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:43:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:43:07,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2022-11-22 01:43:07,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2022-11-22 01:43:07,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:43:07,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330271229] [2022-11-22 01:43:07,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:43:07,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099518500] [2022-11-22 01:43:07,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099518500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:07,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [630861460] [2022-11-22 01:43:07,579 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:43:07,579 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:43:07,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:43:07,580 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:43:07,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:43:07,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:07,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:07,672 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-11-22 01:43:07,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 01:43:07,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:07,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:07,799 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:43:07,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:43:07,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:07,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-22 01:43:08,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:08,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:08,131 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-22 01:43:08,132 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 337 treesize of output 330 [2022-11-22 01:43:08,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:43:08,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:43:08,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:08,479 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 01:43:08,480 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 27 treesize of output 27 [2022-11-22 01:43:08,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:08,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:08,603 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-11-22 01:43:08,604 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 110 treesize of output 129 [2022-11-22 01:43:08,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:08,788 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:43:08,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:43:08,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:08,856 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:43:08,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:43:08,924 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:43:19,674 WARN L233 SmtUtils]: Spent 10.63s on a formula simplification. DAG size of input: 105 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:43:20,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1914#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:43:20,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:43:20,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:43:20,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-22 01:43:20,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3250167] [2022-11-22 01:43:20,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:43:20,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:43:20,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:43:20,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:43:20,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2022-11-22 01:43:20,417 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:20,726 INFO L93 Difference]: Finished difference Result 212 states and 290 transitions. [2022-11-22 01:43:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:43:20,727 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-22 01:43:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:20,732 INFO L225 Difference]: With dead ends: 212 [2022-11-22 01:43:20,732 INFO L226 Difference]: Without dead ends: 152 [2022-11-22 01:43:20,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 26 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=223, Invalid=329, Unknown=0, NotChecked=0, Total=552 [2022-11-22 01:43:20,735 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 168 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:20,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 30 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:43:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-22 01:43:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2022-11-22 01:43:20,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.1590909090909092) internal successors, (153), 132 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2022-11-22 01:43:20,829 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 55 [2022-11-22 01:43:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:20,829 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2022-11-22 01:43:20,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2022-11-22 01:43:20,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-22 01:43:20,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:20,841 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:43:20,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:21,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:43:21,050 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:43:21,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:21,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1833412405, now seen corresponding path program 5 times [2022-11-22 01:43:21,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:43:21,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602956187] [2022-11-22 01:43:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:21,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:43:21,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:43:21,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056731871] [2022-11-22 01:43:21,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:43:21,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:43:21,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:43:21,133 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:43:21,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:43:42,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-22 01:43:42,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:43:42,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:43:42,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2022-11-22 01:43:42,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 4 proven. 418 refuted. 0 times theorem prover too weak. 1490 trivial. 0 not checked. [2022-11-22 01:43:43,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:43:43,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602956187] [2022-11-22 01:43:43,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:43:43,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056731871] [2022-11-22 01:43:43,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056731871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:43,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64396475] [2022-11-22 01:43:43,255 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:43:43,256 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:43:43,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:43:43,256 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:43:43,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:43:43,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:43,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:43,349 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:43:43,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:43:43,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:43,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:43,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-11-22 01:43:43,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:43,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-22 01:43:43,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:43,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:43,661 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-22 01:43:43,661 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 345 treesize of output 328 [2022-11-22 01:43:43,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:43:43,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:43:43,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:43,964 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 01:43:43,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 01:43:44,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:44,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:44,093 INFO L321 Elim1Store]: treesize reduction 106, result has 39.1 percent of original size [2022-11-22 01:43:44,094 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 110 treesize of output 139 [2022-11-22 01:43:44,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:44,229 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:43:44,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:43:44,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:44,279 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:43:44,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:43:44,356 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:43:50,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3207#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:43:50,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:43:50,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:43:50,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-22 01:43:50,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208932781] [2022-11-22 01:43:50,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:43:50,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 01:43:50,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:43:50,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 01:43:50,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=534, Unknown=0, NotChecked=0, Total=930 [2022-11-22 01:43:50,812 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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) [2022-11-22 01:43:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:43:51,522 INFO L93 Difference]: Finished difference Result 428 states and 566 transitions. [2022-11-22 01:43:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 01:43:51,523 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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 103 [2022-11-22 01:43:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:43:51,525 INFO L225 Difference]: With dead ends: 428 [2022-11-22 01:43:51,525 INFO L226 Difference]: Without dead ends: 308 [2022-11-22 01:43:51,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 228 SyntacticMatches, 50 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=715, Invalid=1007, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 01:43:51,533 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 376 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:43:51,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 66 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:43:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-22 01:43:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 265. [2022-11-22 01:43:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.125) internal successors, (297), 264 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:43:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2022-11-22 01:43:51,610 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 103 [2022-11-22 01:43:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:43:51,610 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2022-11-22 01:43:51,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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) [2022-11-22 01:43:51,611 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2022-11-22 01:43:51,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-22 01:43:51,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:43:51,614 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:43:51,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:43:51,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:43:51,839 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:43:51,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:43:51,839 INFO L85 PathProgramCache]: Analyzing trace with hash 841137355, now seen corresponding path program 6 times [2022-11-22 01:43:51,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:43:51,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979021013] [2022-11-22 01:43:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:43:51,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:43:51,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:43:51,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284544906] [2022-11-22 01:43:51,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:43:51,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:43:51,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:43:51,913 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:43:51,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:43:52,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:43:52,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:43:52,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 01:43:52,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:43:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 231 proven. 3206 refuted. 0 times theorem prover too weak. 4955 trivial. 0 not checked. [2022-11-22 01:43:53,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:43:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8392 backedges. 231 proven. 3206 refuted. 0 times theorem prover too weak. 4955 trivial. 0 not checked. [2022-11-22 01:43:53,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:43:53,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979021013] [2022-11-22 01:43:53,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:43:53,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284544906] [2022-11-22 01:43:53,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284544906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:43:53,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460876228] [2022-11-22 01:43:53,888 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:43:53,888 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:43:53,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:43:53,889 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:43:53,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:43:53,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:53,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:53,991 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:43:53,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:43:54,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:54,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:54,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-11-22 01:43:54,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:54,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-22 01:43:54,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:43:54,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:54,329 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-22 01:43:54,330 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 337 treesize of output 330 [2022-11-22 01:43:54,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:43:54,496 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 21 treesize of output 17 [2022-11-22 01:43:54,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:54,646 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 01:43:54,647 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 27 treesize of output 27 [2022-11-22 01:43:54,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:54,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:54,756 INFO L321 Elim1Store]: treesize reduction 116, result has 33.3 percent of original size [2022-11-22 01:43:54,757 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 110 treesize of output 129 [2022-11-22 01:43:54,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:54,859 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:43:54,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:43:54,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:43:54,928 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:43:54,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:43:54,988 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:44:01,772 WARN L233 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 105 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:44:08,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5762#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:44:08,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:44:08,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:44:08,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-11-22 01:44:08,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540568781] [2022-11-22 01:44:08,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:44:08,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-22 01:44:08,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:44:08,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-22 01:44:08,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1255, Invalid=2651, Unknown=0, NotChecked=0, Total=3906 [2022-11-22 01:44:08,457 INFO L87 Difference]: Start difference. First operand 265 states and 297 transitions. Second operand has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:44:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:44:12,461 INFO L93 Difference]: Finished difference Result 1487 states and 1700 transitions. [2022-11-22 01:44:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-22 01:44:12,461 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-11-22 01:44:12,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:44:12,467 INFO L225 Difference]: With dead ends: 1487 [2022-11-22 01:44:12,467 INFO L226 Difference]: Without dead ends: 1320 [2022-11-22 01:44:12,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 493 SyntacticMatches, 98 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16517 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=8538, Invalid=19184, Unknown=0, NotChecked=0, Total=27722 [2022-11-22 01:44:12,477 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 592 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:44:12,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 733 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:44:12,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-11-22 01:44:12,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 553. [2022-11-22 01:44:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.0815217391304348) internal successors, (597), 552 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:44:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 597 transitions. [2022-11-22 01:44:12,623 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 597 transitions. Word has length 199 [2022-11-22 01:44:12,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:44:12,623 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 597 transitions. [2022-11-22 01:44:12,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:44:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 597 transitions. [2022-11-22 01:44:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-11-22 01:44:12,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:44:12,634 INFO L195 NwaCegarLoop]: trace histogram [220, 220, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:44:12,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-22 01:44:12,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:44:12,841 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:44:12,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:44:12,842 INFO L85 PathProgramCache]: Analyzing trace with hash 633503579, now seen corresponding path program 7 times [2022-11-22 01:44:12,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:44:12,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648314594] [2022-11-22 01:44:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:44:12,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:44:13,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:44:13,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573705409] [2022-11-22 01:44:13,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:44:13,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:44:13,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:44:13,079 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:44:13,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:44:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:44:14,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 3720 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:44:14,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:44:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 52780 backedges. 4771 proven. 253 refuted. 0 times theorem prover too weak. 47756 trivial. 0 not checked. [2022-11-22 01:44:14,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:44:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 52780 backedges. 4771 proven. 253 refuted. 0 times theorem prover too weak. 47756 trivial. 0 not checked. [2022-11-22 01:44:15,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:44:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648314594] [2022-11-22 01:44:15,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:44:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573705409] [2022-11-22 01:44:15,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573705409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:44:15,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [429105221] [2022-11-22 01:44:15,584 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:44:15,584 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:44:15,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:44:15,585 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:44:15,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:44:15,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:15,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:15,688 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:44:15,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:44:15,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:15,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:15,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2022-11-22 01:44:15,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:15,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-22 01:44:15,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:44:15,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:44:15,995 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-22 01:44:15,995 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 337 treesize of output 330 [2022-11-22 01:44:16,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:44:16,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:44:16,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:44:16,320 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 01:44:16,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-22 01:44:16,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:44:16,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:44:16,429 INFO L321 Elim1Store]: treesize reduction 106, result has 39.1 percent of original size [2022-11-22 01:44:16,430 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 110 treesize of output 139 [2022-11-22 01:44:16,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:44:16,564 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:44:16,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:44:16,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:44:16,619 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:44:16,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2022-11-22 01:44:16,678 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:44:23,545 WARN L233 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 105 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:44:32,940 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12652#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:44:32,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:44:32,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:44:32,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2022-11-22 01:44:32,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580147507] [2022-11-22 01:44:32,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:44:32,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-22 01:44:32,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:44:32,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-22 01:44:32,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1344, Invalid=1626, Unknown=0, NotChecked=0, Total=2970 [2022-11-22 01:44:32,945 INFO L87 Difference]: Start difference. First operand 553 states and 597 transitions. Second operand has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:44:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:44:35,129 INFO L93 Difference]: Finished difference Result 1724 states and 2294 transitions. [2022-11-22 01:44:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-22 01:44:35,130 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 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 487 [2022-11-22 01:44:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:44:35,134 INFO L225 Difference]: With dead ends: 1724 [2022-11-22 01:44:35,135 INFO L226 Difference]: Without dead ends: 1196 [2022-11-22 01:44:35,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1482 GetRequests, 1164 SyntacticMatches, 242 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18600 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=2563, Invalid=3443, Unknown=0, NotChecked=0, Total=6006 [2022-11-22 01:44:35,138 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 824 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:44:35,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 138 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:44:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-11-22 01:44:35,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1105. [2022-11-22 01:44:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 1.0625) internal successors, (1173), 1104 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:44:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1173 transitions. [2022-11-22 01:44:35,527 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1173 transitions. Word has length 487 [2022-11-22 01:44:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:44:35,528 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1173 transitions. [2022-11-22 01:44:35,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:44:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1173 transitions. [2022-11-22 01:44:35,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2022-11-22 01:44:35,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:44:35,564 INFO L195 NwaCegarLoop]: trace histogram [460, 460, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:44:35,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:44:35,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 01:44:35,777 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:44:35,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:44:35,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1638071461, now seen corresponding path program 8 times [2022-11-22 01:44:35,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:44:35,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525941403] [2022-11-22 01:44:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:44:35,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:44:36,167 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:44:36,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962322901] [2022-11-22 01:44:36,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:44:36,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:44:36,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:44:36,171 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:44:36,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_962ebdb0-dac2-4b44-9a0d-37ffe9f97e16/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process