./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/transpose-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_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/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_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/transpose-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/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_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/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 44b06771d393671cf9550617b8bf478abc837489f84f20705c70efc1808f7508 --- 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 01:56:27,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:56:27,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:56:27,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:56:27,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:56:27,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:56:27,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:56:27,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:56:27,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:56:27,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:56:27,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:56:27,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:56:27,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:56:27,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:56:27,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:56:27,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:56:27,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:56:27,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:56:27,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:56:27,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:56:27,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:56:27,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:56:27,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:56:27,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:56:27,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:56:27,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:56:27,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:56:27,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:56:27,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:56:27,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:56:27,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:56:27,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:56:27,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:56:27,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:56:27,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:56:27,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:56:27,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:56:27,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:56:27,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:56:27,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:56:27,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:56:27,499 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:56:27,552 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:56:27,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:56:27,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:56:27,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:56:27,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:56:27,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:56:27,555 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:56:27,555 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:56:27,555 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:56:27,555 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:56:27,556 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:56:27,557 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:56:27,557 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:56:27,557 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:56:27,557 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:56:27,558 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:56:27,558 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:56:27,558 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:56:27,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:56:27,559 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:56:27,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:56:27,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:56:27,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:56:27,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:56:27,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:56:27,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:56:27,560 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:56:27,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:56:27,561 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:56:27,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:56:27,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:56:27,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:56:27,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:56:27,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:56:27,562 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:56:27,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:56:27,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:56:27,563 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:56:27,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:56:27,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:56:27,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:56:27,564 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_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44b06771d393671cf9550617b8bf478abc837489f84f20705c70efc1808f7508 [2022-11-22 01:56:27,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:56:27,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:56:27,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:56:27,910 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:56:27,911 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:56:27,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-multidimensional/transpose-u.c [2022-11-22 01:56:31,149 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:56:31,367 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:56:31,368 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/sv-benchmarks/c/array-multidimensional/transpose-u.c [2022-11-22 01:56:31,375 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/data/3f21444ac/a9367b871ea84e3483d81a5e6d056f62/FLAGabea2958a [2022-11-22 01:56:31,390 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/data/3f21444ac/a9367b871ea84e3483d81a5e6d056f62 [2022-11-22 01:56:31,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:56:31,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:56:31,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:56:31,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:56:31,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:56:31,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:56:31" (1/1) ... [2022-11-22 01:56:31,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dc5f19a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31, skipping insertion in model container [2022-11-22 01:56:31,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:56:31" (1/1) ... [2022-11-22 01:56:31,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:56:31,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:56:31,572 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_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/sv-benchmarks/c/array-multidimensional/transpose-u.c[315,328] [2022-11-22 01:56:31,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:56:31,601 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:56:31,613 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_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/sv-benchmarks/c/array-multidimensional/transpose-u.c[315,328] [2022-11-22 01:56:31,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:56:31,636 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:56:31,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31 WrapperNode [2022-11-22 01:56:31,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:56:31,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:56:31,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:56:31,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:56:31,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31" (1/1) ... [2022-11-22 01:56:31,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31" (1/1) ... [2022-11-22 01:56:31,673 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-11-22 01:56:31,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:56:31,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:56:31,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:56:31,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:56:31,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31" (1/1) ... [2022-11-22 01:56:31,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31" (1/1) ... [2022-11-22 01:56:31,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31" (1/1) ... [2022-11-22 01:56:31,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31" (1/1) ... [2022-11-22 01:56:31,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31" (1/1) ... [2022-11-22 01:56:31,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31" (1/1) ... [2022-11-22 01:56:31,698 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31" (1/1) ... [2022-11-22 01:56:31,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31" (1/1) ... [2022-11-22 01:56:31,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:56:31,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:56:31,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:56:31,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:56:31,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31" (1/1) ... [2022-11-22 01:56:31,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:56:31,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:56:31,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:56:31,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:56:31,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:56:31,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:56:31,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:56:31,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:56:31,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:56:31,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:56:31,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:56:31,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:56:31,858 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:56:31,861 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:56:32,050 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:56:32,095 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:56:32,095 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-22 01:56:32,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:56:32 BoogieIcfgContainer [2022-11-22 01:56:32,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:56:32,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:56:32,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:56:32,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:56:32,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:56:31" (1/3) ... [2022-11-22 01:56:32,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd62ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:56:32, skipping insertion in model container [2022-11-22 01:56:32,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:56:31" (2/3) ... [2022-11-22 01:56:32,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd62ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:56:32, skipping insertion in model container [2022-11-22 01:56:32,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:56:32" (3/3) ... [2022-11-22 01:56:32,109 INFO L112 eAbstractionObserver]: Analyzing ICFG transpose-u.c [2022-11-22 01:56:32,130 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:56:32,131 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:56:32,180 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:56:32,186 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;@23828a94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:56:32,187 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:56:32,191 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 01:56:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:56:32,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:32,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:32,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:56:32,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:32,204 INFO L85 PathProgramCache]: Analyzing trace with hash 772701100, now seen corresponding path program 1 times [2022-11-22 01:56:32,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:56:32,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658983081] [2022-11-22 01:56:32,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:32,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:56:32,381 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:56:32,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195718357] [2022-11-22 01:56:32,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:32,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:32,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:56:32,390 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:56:32,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:56:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:56:32,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:56:32,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:32,626 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 01:56:32,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:56:32,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:56:32,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658983081] [2022-11-22 01:56:32,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:56:32,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195718357] [2022-11-22 01:56:32,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195718357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:56:32,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:56:32,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:56:32,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185774420] [2022-11-22 01:56:32,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:56:32,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:56:32,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:56:32,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:56:32,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:56:32,685 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 01:56:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:56:32,762 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-11-22 01:56:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:56:32,766 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 01:56:32,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:56:32,780 INFO L225 Difference]: With dead ends: 23 [2022-11-22 01:56:32,780 INFO L226 Difference]: Without dead ends: 13 [2022-11-22 01:56:32,783 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 01:56:32,791 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:56:32,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:56:32,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-22 01:56:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-22 01:56:32,827 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 01:56:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-22 01:56:32,830 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2022-11-22 01:56:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:56:32,830 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-22 01:56:32,830 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 01:56:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-22 01:56:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:56:32,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:32,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:32,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:33,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 01:56:33,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:56:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1780268602, now seen corresponding path program 1 times [2022-11-22 01:56:33,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:56:33,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105114633] [2022-11-22 01:56:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:56:33,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:56:33,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678714890] [2022-11-22 01:56:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:33,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:33,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:56:33,054 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:56:33,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:56:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:56:33,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:56:33,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:33,174 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 01:56:33,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:56:33,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:56:33,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105114633] [2022-11-22 01:56:33,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:56:33,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678714890] [2022-11-22 01:56:33,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678714890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:56:33,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:56:33,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:56:33,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218039037] [2022-11-22 01:56:33,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:56:33,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:56:33,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:56:33,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:56:33,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:56:33,183 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 01:56:33,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:56:33,260 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-11-22 01:56:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:56:33,261 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 01:56:33,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:56:33,262 INFO L225 Difference]: With dead ends: 31 [2022-11-22 01:56:33,263 INFO L226 Difference]: Without dead ends: 21 [2022-11-22 01:56:33,263 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 01:56:33,265 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:56:33,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 6 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:56:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-22 01:56:33,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2022-11-22 01:56:33,278 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 01:56:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-11-22 01:56:33,279 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2022-11-22 01:56:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:56:33,279 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-11-22 01:56:33,280 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 01:56:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-11-22 01:56:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:56:33,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:33,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:33,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:33,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:33,488 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:56:33,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:33,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1219869114, now seen corresponding path program 1 times [2022-11-22 01:56:33,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:56:33,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704367646] [2022-11-22 01:56:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:33,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:56:33,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:56:33,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533537089] [2022-11-22 01:56:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:33,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:33,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:56:33,506 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:56:33,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:56:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:56:33,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:56:33,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:33,677 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 01:56:33,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:33,721 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 01:56:33,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:56:33,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704367646] [2022-11-22 01:56:33,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:56:33,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533537089] [2022-11-22 01:56:33,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533537089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:33,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [631585940] [2022-11-22 01:56:33,747 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 01:56:33,747 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:56:33,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:56:33,757 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:56:33,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:56:33,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:33,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:33,962 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:56:33,963 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 01:56:33,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:33,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:33,991 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 01:56:34,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:34,074 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 01:56:34,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:34,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:34,394 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-22 01:56:34,395 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 351 treesize of output 334 [2022-11-22 01:56:34,544 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 01:56:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:34,711 INFO L321 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-22 01:56:34,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 183 [2022-11-22 01:56:34,804 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 01:56:34,853 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 17 treesize of output 13 [2022-11-22 01:56:34,958 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:56:34,961 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 101 treesize of output 96 [2022-11-22 01:56:35,066 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 01:56:35,112 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 17 treesize of output 13 [2022-11-22 01:56:35,189 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:56:35,190 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 101 treesize of output 96 [2022-11-22 01:56:35,268 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 01:56:35,274 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:56:35,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [631585940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:56:35,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:56:35,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2022-11-22 01:56:35,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253363666] [2022-11-22 01:56:35,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:56:35,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:56:35,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:56:35,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:56:35,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:56:35,369 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 01:56:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:56:35,432 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2022-11-22 01:56:35,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:56:35,433 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 01:56:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:56:35,434 INFO L225 Difference]: With dead ends: 24 [2022-11-22 01:56:35,434 INFO L226 Difference]: Without dead ends: 17 [2022-11-22 01:56:35,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:56:35,435 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:56:35,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:56:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-22 01:56:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-11-22 01:56:35,444 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 01:56:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-22 01:56:35,445 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2022-11-22 01:56:35,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:56:35,445 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-22 01:56:35,445 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 01:56:35,446 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-22 01:56:35,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:56:35,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:35,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:35,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:35,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:35,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:56:35,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:35,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2079016109, now seen corresponding path program 1 times [2022-11-22 01:56:35,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:56:35,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313939528] [2022-11-22 01:56:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:35,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:56:35,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:56:35,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25094743] [2022-11-22 01:56:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:35,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:35,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:56:35,667 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:56:35,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:56:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:56:35,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:56:35,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:35,774 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 01:56:35,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:35,798 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 01:56:35,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:56:35,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313939528] [2022-11-22 01:56:35,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:56:35,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25094743] [2022-11-22 01:56:35,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25094743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:35,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1889156724] [2022-11-22 01:56:35,801 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:56:35,801 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:56:35,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:56:35,802 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:56:35,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:56:35,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:35,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:35,898 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:56:35,899 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 01:56:35,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:35,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:35,920 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 01:56:35,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:35,991 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 01:56:36,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:36,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:36,144 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-22 01:56:36,145 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 351 treesize of output 334 [2022-11-22 01:56:36,232 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 01:56:36,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:36,328 INFO L321 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-22 01:56:36,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 183 [2022-11-22 01:56:36,382 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 01:56:36,411 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 17 treesize of output 13 [2022-11-22 01:56:36,463 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:56:36,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 96 [2022-11-22 01:56:36,533 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 01:56:36,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:36,572 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 01:56:36,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 01:56:36,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:36,720 INFO L321 Elim1Store]: treesize reduction 184, result has 29.8 percent of original size [2022-11-22 01:56:36,721 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 115 treesize of output 156 [2022-11-22 01:56:36,907 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 01:56:36,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-11-22 01:56:37,001 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 01:56:37,001 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 36 treesize of output 36 [2022-11-22 01:56:37,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-22 01:56:37,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 94 [2022-11-22 01:56:37,147 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 01:56:37,152 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:56:37,601 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '403#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (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~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= |ULTIMATE.start_main_~m~0#1| 1800) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:56:37,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:56:37,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:56:37,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-22 01:56:37,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900460145] [2022-11-22 01:56:37,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:56:37,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:56:37,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:56:37,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:56:37,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:56:37,603 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 01:56:37,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:56:37,722 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2022-11-22 01:56:37,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:56:37,723 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 01:56:37,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:56:37,725 INFO L225 Difference]: With dead ends: 51 [2022-11-22 01:56:37,725 INFO L226 Difference]: Without dead ends: 37 [2022-11-22 01:56:37,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:56:37,729 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:56:37,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 12 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:56:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-22 01:56:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-11-22 01:56:37,744 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 01:56:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-22 01:56:37,747 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 13 [2022-11-22 01:56:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:56:37,747 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-22 01:56:37,748 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 01:56:37,748 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-22 01:56:37,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:56:37,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:37,749 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:37,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:37,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:37,955 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:56:37,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:37,955 INFO L85 PathProgramCache]: Analyzing trace with hash 362786941, now seen corresponding path program 2 times [2022-11-22 01:56:37,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:56:37,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763577747] [2022-11-22 01:56:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:37,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:56:37,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:56:37,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114141005] [2022-11-22 01:56:37,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:56:37,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:37,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:56:37,972 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:56:37,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:56:38,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:56:38,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:56:38,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:56:38,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:38,085 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 01:56:38,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:38,109 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 01:56:38,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:56:38,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763577747] [2022-11-22 01:56:38,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:56:38,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114141005] [2022-11-22 01:56:38,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114141005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:38,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1197537372] [2022-11-22 01:56:38,119 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:56:38,119 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:56:38,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:56:38,120 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:56:38,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:56:38,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,204 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-11-22 01:56:38,204 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 01:56:38,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,326 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:56:38,327 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 01:56:38,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,375 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 01:56:38,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,481 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-22 01:56:38,481 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 351 treesize of output 334 [2022-11-22 01:56:38,554 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 01:56:38,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,645 INFO L321 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-22 01:56:38,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 183 [2022-11-22 01:56:38,701 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 01:56:38,756 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 01:56:38,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 94 [2022-11-22 01:56:38,841 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 01:56:38,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:38,893 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:56:38,894 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 36 treesize of output 36 [2022-11-22 01:56:38,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:38,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:39,011 INFO L321 Elim1Store]: treesize reduction 113, result has 13.1 percent of original size [2022-11-22 01:56:39,011 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 126 treesize of output 131 [2022-11-22 01:56:39,076 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 01:56:39,076 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 36 treesize of output 36 [2022-11-22 01:56:39,129 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 01:56:39,130 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 36 treesize of output 36 [2022-11-22 01:56:39,216 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 01:56:39,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 94 [2022-11-22 01:56:39,283 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 01:56:39,289 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:56:39,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '660#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (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~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= |ULTIMATE.start_main_~m~0#1| 1800) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:56:39,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:56:39,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:56:39,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-22 01:56:39,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612900176] [2022-11-22 01:56:39,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:56:39,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:56:39,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:56:39,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:56:39,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:56:39,894 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 01:56:39,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:56:39,963 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2022-11-22 01:56:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:56:39,963 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 01:56:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:56:39,965 INFO L225 Difference]: With dead ends: 72 [2022-11-22 01:56:39,965 INFO L226 Difference]: Without dead ends: 49 [2022-11-22 01:56:39,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:56:39,967 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:56:39,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 11 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:56:39,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-22 01:56:39,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-22 01:56:39,981 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 01:56:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-11-22 01:56:39,983 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19 [2022-11-22 01:56:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:56:39,983 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-11-22 01:56:39,983 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 01:56:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-11-22 01:56:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:56:39,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:39,984 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:39,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:40,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:40,195 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:56:40,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:40,195 INFO L85 PathProgramCache]: Analyzing trace with hash 959660619, now seen corresponding path program 3 times [2022-11-22 01:56:40,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:56:40,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297661181] [2022-11-22 01:56:40,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:40,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:56:40,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:56:40,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261581723] [2022-11-22 01:56:40,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:56:40,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:40,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:56:40,214 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:56:40,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:56:40,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:56:40,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:56:40,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:56:40,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:40,385 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 01:56:40,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:40,460 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 01:56:40,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:56:40,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297661181] [2022-11-22 01:56:40,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:56:40,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261581723] [2022-11-22 01:56:40,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261581723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:40,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1506249187] [2022-11-22 01:56:40,463 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:56:40,463 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:56:40,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:56:40,464 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:56:40,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:56:40,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:40,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:40,538 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-11-22 01:56:40,539 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 01:56:40,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:40,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:40,626 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:56:40,626 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 01:56:40,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:40,670 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 01:56:40,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:40,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:40,789 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-22 01:56:40,790 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 343 treesize of output 336 [2022-11-22 01:56:40,979 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 01:56:41,031 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 17 treesize of output 13 [2022-11-22 01:56:41,053 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 01:56:41,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:41,105 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:56:41,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-11-22 01:56:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:41,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:41,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:41,196 INFO L321 Elim1Store]: treesize reduction 113, result has 13.1 percent of original size [2022-11-22 01:56:41,197 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 126 treesize of output 131 [2022-11-22 01:56:41,257 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 01:56:41,258 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 36 treesize of output 36 [2022-11-22 01:56:41,306 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 01:56:41,307 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 36 treesize of output 36 [2022-11-22 01:56:41,416 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 17 treesize of output 13 [2022-11-22 01:56:41,442 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 01:56:41,447 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:56:42,116 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1110#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (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~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= |ULTIMATE.start_main_~m~0#1| 1800) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:56:42,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:56:42,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:56:42,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-22 01:56:42,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137218697] [2022-11-22 01:56:42,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:56:42,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 01:56:42,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:56:42,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 01:56:42,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2022-11-22 01:56:42,118 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 01:56:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:56:42,610 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2022-11-22 01:56:42,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 01:56:42,611 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 01:56:42,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:56:42,612 INFO L225 Difference]: With dead ends: 148 [2022-11-22 01:56:42,612 INFO L226 Difference]: Without dead ends: 132 [2022-11-22 01:56:42,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 01:56:42,614 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 147 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:56:42,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 78 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:56:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-22 01:56:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 67. [2022-11-22 01:56:42,633 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 01:56:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2022-11-22 01:56:42,634 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 37 [2022-11-22 01:56:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:56:42,635 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2022-11-22 01:56:42,635 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 01:56:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2022-11-22 01:56:42,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-22 01:56:42,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:42,636 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:42,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:42,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 01:56:42,842 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:56:42,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:42,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1149059184, now seen corresponding path program 4 times [2022-11-22 01:56:42,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:56:42,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965456606] [2022-11-22 01:56:42,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:42,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:56:42,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:56:42,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921007004] [2022-11-22 01:56:42,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:56:42,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:42,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:56:42,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:56:42,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:56:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:56:43,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:56:43,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:43,087 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 01:56:43,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:43,181 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 01:56:43,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:56:43,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965456606] [2022-11-22 01:56:43,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:56:43,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921007004] [2022-11-22 01:56:43,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921007004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:43,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639036663] [2022-11-22 01:56:43,185 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:56:43,185 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:56:43,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:56:43,186 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:56:43,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:56:43,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:43,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:43,261 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-11-22 01:56:43,261 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 01:56:43,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:43,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:43,356 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:56:43,356 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 01:56:43,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:43,410 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 01:56:43,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:43,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:43,529 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-22 01:56:43,529 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 351 treesize of output 334 [2022-11-22 01:56:43,596 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 01:56:43,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:43,678 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-22 01:56:43,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 187 [2022-11-22 01:56:43,738 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 01:56:43,757 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 01:56:43,782 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 01:56:43,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 94 [2022-11-22 01:56:43,840 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 01:56:43,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:56:43,877 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 01:56:43,877 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 36 treesize of output 36 [2022-11-22 01:56:43,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:43,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:43,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:43,992 INFO L321 Elim1Store]: treesize reduction 113, result has 13.1 percent of original size [2022-11-22 01:56:43,993 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 126 treesize of output 131 [2022-11-22 01:56:44,061 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 01:56:44,062 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 36 treesize of output 36 [2022-11-22 01:56:44,108 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 01:56:44,108 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 36 treesize of output 36 [2022-11-22 01:56:44,189 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 17 treesize of output 13 [2022-11-22 01:56:44,231 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 01:56:44,231 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 101 treesize of output 96 [2022-11-22 01:56:44,288 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 01:56:44,292 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:56:44,856 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1851#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (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~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= |ULTIMATE.start_main_~m~0#1| 1800) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:56:44,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:56:44,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:56:44,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-22 01:56:44,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948172508] [2022-11-22 01:56:44,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:56:44,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:56:44,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:56:44,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:56:44,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:56:44,858 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 01:56:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:56:45,112 INFO L93 Difference]: Finished difference Result 211 states and 289 transitions. [2022-11-22 01:56:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:56:45,113 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 01:56:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:56:45,114 INFO L225 Difference]: With dead ends: 211 [2022-11-22 01:56:45,114 INFO L226 Difference]: Without dead ends: 151 [2022-11-22 01:56:45,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=251, Invalid=451, Unknown=0, NotChecked=0, Total=702 [2022-11-22 01:56:45,116 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 143 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:56:45,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 30 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:56:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-22 01:56:45,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2022-11-22 01:56:45,196 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 01:56:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2022-11-22 01:56:45,203 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 55 [2022-11-22 01:56:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:56:45,203 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2022-11-22 01:56:45,204 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 01:56:45,204 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2022-11-22 01:56:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-22 01:56:45,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:45,213 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:45,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:45,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 01:56:45,420 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:56:45,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:45,420 INFO L85 PathProgramCache]: Analyzing trace with hash -970721808, now seen corresponding path program 5 times [2022-11-22 01:56:45,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:56:45,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493025716] [2022-11-22 01:56:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:45,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:56:45,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:56:45,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142721102] [2022-11-22 01:56:45,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:56:45,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:45,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:56:45,463 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:56:45,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:00:34,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-22 02:00:34,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:00:34,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:00:34,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:34,833 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 02:00:34,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:35,152 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 02:00:35,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:00:35,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493025716] [2022-11-22 02:00:35,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:00:35,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142721102] [2022-11-22 02:00:35,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142721102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:35,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045304373] [2022-11-22 02:00:35,155 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 02:00:35,155 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:00:35,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:00:35,155 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:00:35,156 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:00:35,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:35,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:35,240 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:00:35,240 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 02:00:35,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:35,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:35,260 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 02:00:35,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:35,295 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 02:00:35,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:35,402 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-22 02:00:35,402 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 351 treesize of output 334 [2022-11-22 02:00:35,473 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 02:00:35,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:35,577 INFO L321 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2022-11-22 02:00:35,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 187 [2022-11-22 02:00:35,634 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 02:00:35,657 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 02:00:35,685 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 17 treesize of output 13 [2022-11-22 02:00:35,725 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 02:00:35,726 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 101 treesize of output 96 [2022-11-22 02:00:35,768 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 02:00:35,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:00:35,803 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 02:00:35,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:00:35,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:00:35,936 INFO L321 Elim1Store]: treesize reduction 184, result has 29.8 percent of original size [2022-11-22 02:00:35,936 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 115 treesize of output 156 [2022-11-22 02:00:36,080 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 02:00:36,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-11-22 02:00:36,165 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 02:00:36,166 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 36 treesize of output 36 [2022-11-22 02:00:36,237 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 02:00:36,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 94 [2022-11-22 02:00:36,295 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 02:00:36,299 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:00:37,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3121#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (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~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= |ULTIMATE.start_main_~m~0#1| 1800) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 02:00:37,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:00:37,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:00:37,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-22 02:00:37,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119458758] [2022-11-22 02:00:37,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:00:37,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 02:00:37,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:00:37,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 02:00:37,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=638, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 02:00:37,748 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:00:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:00:38,284 INFO L93 Difference]: Finished difference Result 427 states and 565 transitions. [2022-11-22 02:00:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 02:00:38,285 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-11-22 02:00:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:00:38,286 INFO L225 Difference]: With dead ends: 427 [2022-11-22 02:00:38,286 INFO L226 Difference]: Without dead ends: 307 [2022-11-22 02:00:38,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 232 SyntacticMatches, 44 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2122 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=737, Invalid=1155, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 02:00:38,288 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 367 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:00:38,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 66 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:00:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-22 02:00:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 265. [2022-11-22 02:00:38,332 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 02:00:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 297 transitions. [2022-11-22 02:00:38,333 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 297 transitions. Word has length 103 [2022-11-22 02:00:38,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:00:38,334 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 297 transitions. [2022-11-22 02:00:38,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:00:38,334 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 297 transitions. [2022-11-22 02:00:38,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-22 02:00:38,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:00:38,337 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:00:38,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:00:38,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:00:38,538 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:00:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:00:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash 538116336, now seen corresponding path program 6 times [2022-11-22 02:00:38,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:00:38,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26652747] [2022-11-22 02:00:38,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:38,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:00:38,620 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:00:38,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637039486] [2022-11-22 02:00:38,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:00:38,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:00:38,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:00:38,622 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:00:38,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:00:38,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:00:38,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:00:38,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 02:00:38,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:39,742 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 02:00:39,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:40,421 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 02:00:40,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:00:40,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26652747] [2022-11-22 02:00:40,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:00:40,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637039486] [2022-11-22 02:00:40,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637039486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:40,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [366236822] [2022-11-22 02:00:40,424 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 02:00:40,425 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:00:40,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:00:40,425 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:00:40,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:00:40,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:40,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:40,508 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:00:40,508 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 02:00:40,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:40,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:40,524 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 02:00:40,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:40,561 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 02:00:40,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:40,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:00:40,694 INFO L321 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-22 02:00:40,694 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 343 treesize of output 336 [2022-11-22 02:00:40,833 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 02:00:40,881 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 02:00:40,912 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 02:00:40,935 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 02:00:40,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:00:40,982 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-22 02:00:40,983 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 36 treesize of output 36 [2022-11-22 02:00:41,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:41,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:41,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:41,071 INFO L321 Elim1Store]: treesize reduction 113, result has 13.1 percent of original size [2022-11-22 02:00:41,071 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 126 treesize of output 131 [2022-11-22 02:00:41,124 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 02:00:41,124 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 36 treesize of output 36 [2022-11-22 02:00:41,161 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 02:00:41,162 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 36 treesize of output 36 [2022-11-22 02:00:41,270 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 17 treesize of output 13 [2022-11-22 02:00:41,296 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 02:00:41,300 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:00:42,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5622#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (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~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= |ULTIMATE.start_main_~m~0#1| 1800) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 02:00:42,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:00:42,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:00:42,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-11-22 02:00:42,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042453591] [2022-11-22 02:00:42,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:00:42,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-22 02:00:42,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:00:42,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-22 02:00:42,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=2957, Unknown=0, NotChecked=0, Total=4290 [2022-11-22 02:00:42,188 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 02:00:45,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:00:45,949 INFO L93 Difference]: Finished difference Result 1487 states and 1700 transitions. [2022-11-22 02:00:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-11-22 02:00:45,949 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 02:00:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:00:45,955 INFO L225 Difference]: With dead ends: 1487 [2022-11-22 02:00:45,955 INFO L226 Difference]: Without dead ends: 1320 [2022-11-22 02:00:45,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11225 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8720, Invalid=20010, Unknown=0, NotChecked=0, Total=28730 [2022-11-22 02:00:45,966 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 576 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:00:45,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 705 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 02:00:45,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-11-22 02:00:46,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 553. [2022-11-22 02:00:46,080 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 02:00:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 597 transitions. [2022-11-22 02:00:46,082 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 597 transitions. Word has length 199 [2022-11-22 02:00:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:00:46,082 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 597 transitions. [2022-11-22 02:00:46,083 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 02:00:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 597 transitions. [2022-11-22 02:00:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-11-22 02:00:46,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:00:46,093 INFO L195 NwaCegarLoop]: trace histogram [220, 220, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:00:46,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:00:46,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:00:46,300 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:00:46,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:00:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1043523286, now seen corresponding path program 7 times [2022-11-22 02:00:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:00:46,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841916475] [2022-11-22 02:00:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:00:46,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:00:46,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804365068] [2022-11-22 02:00:46,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:00:46,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:00:46,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:00:46,484 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:00:46,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:00:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:47,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 3718 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:00:47,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:47,990 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 02:00:47,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:48,657 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 02:00:48,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:00:48,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841916475] [2022-11-22 02:00:48,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 02:00:48,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804365068] [2022-11-22 02:00:48,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804365068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:48,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [43258661] [2022-11-22 02:00:48,660 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 02:00:48,660 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:00:48,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:00:48,661 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:00:48,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:00:48,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:48,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:48,740 INFO L321 Elim1Store]: treesize reduction 90, result has 28.6 percent of original size [2022-11-22 02:00:48,741 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 02:00:48,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:48,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:48,827 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 02:00:48,827 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 02:00:48,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:48,866 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 36 treesize of output 38 [2022-11-22 02:00:48,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:48,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:48,964 INFO L321 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2022-11-22 02:00:48,965 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 351 treesize of output 334 [2022-11-22 02:00:49,031 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 02:00:49,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:00:49,108 INFO L321 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-22 02:00:49,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 183 [2022-11-22 02:00:49,196 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 02:00:49,220 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 02:00:49,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 94 [2022-11-22 02:00:49,274 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 02:00:49,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:00:49,305 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 02:00:49,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-22 02:00:49,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:00:49,409 INFO L321 Elim1Store]: treesize reduction 184, result has 29.8 percent of original size [2022-11-22 02:00:49,410 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 115 treesize of output 156 [2022-11-22 02:00:49,544 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 02:00:49,544 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 36 treesize of output 36 [2022-11-22 02:00:49,608 INFO L321 Elim1Store]: treesize reduction 79, result has 17.7 percent of original size [2022-11-22 02:00:49,608 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 36 treesize of output 36 [2022-11-22 02:00:49,671 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 17 treesize of output 13 [2022-11-22 02:00:49,710 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 02:00:49,711 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 101 treesize of output 96 [2022-11-22 02:00:49,778 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 02:00:49,782 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:00:58,460 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12251#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (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~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= |ULTIMATE.start_main_~m~0#1| 1800) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 02:00:58,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:00:58,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:00:58,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2022-11-22 02:00:58,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125344443] [2022-11-22 02:00:58,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:00:58,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-22 02:00:58,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:00:58,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-22 02:00:58,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1366, Invalid=1826, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 02:00:58,464 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 02:01:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:00,247 INFO L93 Difference]: Finished difference Result 1723 states and 2293 transitions. [2022-11-22 02:01:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-22 02:01:00,248 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 02:01:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:00,252 INFO L225 Difference]: With dead ends: 1723 [2022-11-22 02:01:00,252 INFO L226 Difference]: Without dead ends: 1195 [2022-11-22 02:01:00,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1482 GetRequests, 1174 SyntacticMatches, 230 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17950 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=2585, Invalid=3735, Unknown=0, NotChecked=0, Total=6320 [2022-11-22 02:01:00,256 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 958 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:00,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 138 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:01:00,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-11-22 02:01:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1105. [2022-11-22 02:01:00,471 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 02:01:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1173 transitions. [2022-11-22 02:01:00,475 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1173 transitions. Word has length 487 [2022-11-22 02:01:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:00,475 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1173 transitions. [2022-11-22 02:01:00,475 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 02:01:00,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1173 transitions. [2022-11-22 02:01:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2022-11-22 02:01:00,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:00,511 INFO L195 NwaCegarLoop]: trace histogram [460, 460, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:00,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:00,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:01:00,725 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:01:00,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:00,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1757510614, now seen corresponding path program 8 times [2022-11-22 02:01:00,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:01:00,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713477482] [2022-11-22 02:01:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:00,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:01:01,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 02:01:01,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93924093] [2022-11-22 02:01:01,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:01:01,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:01,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:01,108 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:01:01,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5134df-1d5c-46f7-a9c7-5888d6f3983a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process