./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur --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 cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 --- 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-38b53e6 [2022-11-25 23:27:16,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:27:16,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:27:16,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:27:16,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:27:16,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:27:16,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:27:16,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:27:16,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:27:16,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:27:16,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:27:16,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:27:16,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:27:16,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:27:16,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:27:16,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:27:16,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:27:16,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:27:16,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:27:16,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:27:16,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:27:16,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:27:16,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:27:16,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:27:16,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:27:16,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:27:16,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:27:16,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:27:16,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:27:16,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:27:16,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:27:16,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:27:16,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:27:16,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:27:16,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:27:16,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:27:16,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:27:16,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:27:16,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:27:16,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:27:16,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:27:16,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:27:16,520 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:27:16,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:27:16,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:27:16,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:27:16,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:27:16,527 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:27:16,527 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:27:16,527 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:27:16,528 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:27:16,528 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:27:16,529 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:27:16,529 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:27:16,530 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:27:16,530 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:27:16,530 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:27:16,530 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:27:16,531 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:27:16,531 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:27:16,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:27:16,532 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:27:16,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:27:16,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:27:16,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:27:16,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:27:16,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:27:16,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:27:16,534 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:27:16,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:27:16,535 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:27:16,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:27:16,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:27:16,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:27:16,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:27:16,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:27:16,536 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:27:16,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:27:16,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:27:16,537 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:27:16,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:27:16,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:27:16,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:27:16,539 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_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 [2022-11-25 23:27:16,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:27:16,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:27:16,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:27:16,841 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:27:16,842 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:27:16,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2022-11-25 23:27:19,935 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:27:20,203 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:27:20,203 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2022-11-25 23:27:20,209 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/data/48feb7fd7/0e6a628bfa314ce88f457b53f264ebe0/FLAG940d962c3 [2022-11-25 23:27:20,224 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/data/48feb7fd7/0e6a628bfa314ce88f457b53f264ebe0 [2022-11-25 23:27:20,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:27:20,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:27:20,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:27:20,231 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:27:20,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:27:20,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:27:20" (1/1) ... [2022-11-25 23:27:20,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4867a4ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20, skipping insertion in model container [2022-11-25 23:27:20,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:27:20" (1/1) ... [2022-11-25 23:27:20,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:27:20,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:27:20,435 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_0509ebde-fd6d-4766-a64a-acfee9def9ae/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] [2022-11-25 23:27:20,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:27:20,470 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:27:20,481 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_0509ebde-fd6d-4766-a64a-acfee9def9ae/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] [2022-11-25 23:27:20,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:27:20,506 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:27:20,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20 WrapperNode [2022-11-25 23:27:20,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:27:20,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:27:20,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:27:20,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:27:20,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20" (1/1) ... [2022-11-25 23:27:20,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20" (1/1) ... [2022-11-25 23:27:20,543 INFO L138 Inliner]: procedures = 14, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2022-11-25 23:27:20,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:27:20,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:27:20,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:27:20,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:27:20,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20" (1/1) ... [2022-11-25 23:27:20,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20" (1/1) ... [2022-11-25 23:27:20,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20" (1/1) ... [2022-11-25 23:27:20,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20" (1/1) ... [2022-11-25 23:27:20,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20" (1/1) ... [2022-11-25 23:27:20,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20" (1/1) ... [2022-11-25 23:27:20,576 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20" (1/1) ... [2022-11-25 23:27:20,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20" (1/1) ... [2022-11-25 23:27:20,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:27:20,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:27:20,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:27:20,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:27:20,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20" (1/1) ... [2022-11-25 23:27:20,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:27:20,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:27:20,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:27:20,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:27:20,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:27:20,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:27:20,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:27:20,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:27:20,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:27:20,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:27:20,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:27:20,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:27:20,750 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:27:20,755 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:27:20,980 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:27:21,045 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:27:21,045 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-25 23:27:21,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:27:21 BoogieIcfgContainer [2022-11-25 23:27:21,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:27:21,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:27:21,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:27:21,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:27:21,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:27:20" (1/3) ... [2022-11-25 23:27:21,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d994663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:27:21, skipping insertion in model container [2022-11-25 23:27:21,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:27:20" (2/3) ... [2022-11-25 23:27:21,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d994663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:27:21, skipping insertion in model container [2022-11-25 23:27:21,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:27:21" (3/3) ... [2022-11-25 23:27:21,060 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2022-11-25 23:27:21,083 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:27:21,084 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:27:21,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:27:21,147 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;@1ee0be6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:27:21,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:27:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:27:21,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:27:21,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:27:21,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:27:21,187 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:27:21,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:27:21,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1309612569, now seen corresponding path program 1 times [2022-11-25 23:27:21,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:27:21,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476061391] [2022-11-25 23:27:21,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:27:21,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:27:21,330 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:27:21,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783177085] [2022-11-25 23:27:21,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:27:21,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:27:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:27:21,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:27:21,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:27:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:27:21,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:27:21,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:27:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:27:21,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:27:21,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:27:21,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476061391] [2022-11-25 23:27:21,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:27:21,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783177085] [2022-11-25 23:27:21,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783177085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:27:21,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:27:21,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:27:21,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533358047] [2022-11-25 23:27:21,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:27:21,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:27:21,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:27:21,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:27:21,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:27:21,669 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:27:21,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:27:21,770 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2022-11-25 23:27:21,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:27:21,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:27:21,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:27:21,786 INFO L225 Difference]: With dead ends: 27 [2022-11-25 23:27:21,786 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 23:27:21,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:27:21,797 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:27:21,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:27:21,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 23:27:21,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-11-25 23:27:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:27:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2022-11-25 23:27:21,839 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 8 [2022-11-25 23:27:21,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:27:21,840 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2022-11-25 23:27:21,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:27:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2022-11-25 23:27:21,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:27:21,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:27:21,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:27:21,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:27:22,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 23:27:22,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:27:22,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:27:22,050 INFO L85 PathProgramCache]: Analyzing trace with hash -215038707, now seen corresponding path program 1 times [2022-11-25 23:27:22,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:27:22,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241342265] [2022-11-25 23:27:22,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:27:22,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:27:22,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:27:22,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811436804] [2022-11-25 23:27:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:27:22,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:27:22,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:27:22,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:27:22,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:27:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:27:22,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:27:22,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:27:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:27:22,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:27:22,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:27:22,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241342265] [2022-11-25 23:27:22,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:27:22,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811436804] [2022-11-25 23:27:22,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811436804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:27:22,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:27:22,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:27:22,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654089274] [2022-11-25 23:27:22,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:27:22,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:27:22,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:27:22,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:27:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:27:22,233 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-11-25 23:27:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:27:22,335 INFO L93 Difference]: Finished difference Result 37 states and 57 transitions. [2022-11-25 23:27:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:27:22,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2022-11-25 23:27:22,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:27:22,339 INFO L225 Difference]: With dead ends: 37 [2022-11-25 23:27:22,339 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 23:27:22,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:27:22,345 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:27:22,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 10 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:27:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 23:27:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2022-11-25 23:27:22,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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) [2022-11-25 23:27:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2022-11-25 23:27:22,363 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 10 [2022-11-25 23:27:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:27:22,364 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2022-11-25 23:27:22,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-11-25 23:27:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2022-11-25 23:27:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:27:22,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:27:22,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:27:22,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 23:27:22,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:27:22,574 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:27:22,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:27:22,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1517764035, now seen corresponding path program 1 times [2022-11-25 23:27:22,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:27:22,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131498120] [2022-11-25 23:27:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:27:22,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:27:22,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:27:22,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926339153] [2022-11-25 23:27:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:27:22,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:27:22,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:27:22,591 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:27:22,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:27:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:27:22,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:27:22,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:27:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:27:22,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:27:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:27:22,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:27:22,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131498120] [2022-11-25 23:27:22,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:27:22,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926339153] [2022-11-25 23:27:22,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926339153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:27:22,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2083382014] [2022-11-25 23:27:22,833 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:27:22,834 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:27:22,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:27:22,849 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:27:22,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:27:22,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:22,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:23,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:23,147 INFO L321 Elim1Store]: treesize reduction 176, result has 23.1 percent of original size [2022-11-25 23:27:23,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 78 [2022-11-25 23:27:23,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:23,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:23,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:23,415 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 23:27:23,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 23:27:23,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:23,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:23,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-25 23:27:24,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:24,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:24,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:24,344 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-25 23:27:24,344 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 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-25 23:27:24,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:24,601 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:24,602 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:24,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:24,677 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:24,678 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:24,918 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:27:25,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2083382014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:27:25,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:27:25,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2022-11-25 23:27:25,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848958840] [2022-11-25 23:27:25,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:27:25,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:27:25,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:27:25,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:27:25,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:27:25,703 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:27:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:27:27,693 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-11-25 23:27:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:27:27,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 23:27:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:27:27,695 INFO L225 Difference]: With dead ends: 39 [2022-11-25 23:27:27,695 INFO L226 Difference]: Without dead ends: 29 [2022-11-25 23:27:27,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:27:27,696 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:27:27,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:27:27,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-25 23:27:27,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-11-25 23:27:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:27:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2022-11-25 23:27:27,718 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 11 [2022-11-25 23:27:27,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:27:27,719 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2022-11-25 23:27:27,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:27:27,719 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2022-11-25 23:27:27,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 23:27:27,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:27:27,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:27:27,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:27:27,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:27:27,926 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:27:27,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:27:27,927 INFO L85 PathProgramCache]: Analyzing trace with hash 862012475, now seen corresponding path program 1 times [2022-11-25 23:27:27,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:27:27,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667399829] [2022-11-25 23:27:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:27:27,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:27:27,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:27:27,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909561785] [2022-11-25 23:27:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:27:27,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:27:27,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:27:27,947 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:27:27,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:27:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:27:28,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:27:28,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:27:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:27:28,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:27:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:27:28,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:27:28,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667399829] [2022-11-25 23:27:28,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:27:28,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909561785] [2022-11-25 23:27:28,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909561785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:27:28,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1968422173] [2022-11-25 23:27:28,111 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 23:27:28,111 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:27:28,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:27:28,112 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:27:28,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:27:28,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:28,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:28,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:28,309 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 23:27:28,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 23:27:28,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:28,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:28,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:28,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-11-25 23:27:28,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:28,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:28,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-25 23:27:28,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:28,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:28,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:28,880 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-25 23:27:28,881 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 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-25 23:27:29,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,049 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:29,050 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:29,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,113 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:29,114 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:29,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,328 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:27:29,328 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-25 23:27:29,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,379 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:29,380 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:29,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,434 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:29,435 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:29,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,520 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:27:29,520 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-25 23:27:29,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,567 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:29,568 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:29,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,617 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:27:29,618 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-25 23:27:29,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,679 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:29,684 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:29,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,730 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:29,731 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:29,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,816 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:27:29,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:27:29,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:29,982 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:27:29,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:27:30,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:30,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:30,148 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:27:30,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:27:30,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:30,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:30,280 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:27:30,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:27:30,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:30,426 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:30,427 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:30,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:30,470 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:30,471 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:30,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:30,534 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:30,535 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:30,540 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:27:33,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '518#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |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___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 23:27:33,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:27:33,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:27:33,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-25 23:27:33,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353491444] [2022-11-25 23:27:33,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:27:33,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:27:33,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:27:33,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:27:33,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:27:33,903 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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) [2022-11-25 23:27:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:27:34,111 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2022-11-25 23:27:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:27:34,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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) Word has length 17 [2022-11-25 23:27:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:27:34,113 INFO L225 Difference]: With dead ends: 63 [2022-11-25 23:27:34,114 INFO L226 Difference]: Without dead ends: 45 [2022-11-25 23:27:34,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:27:34,116 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 56 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:27:34,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 16 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:27:34,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-25 23:27:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-11-25 23:27:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:27:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-11-25 23:27:34,148 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 17 [2022-11-25 23:27:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:27:34,148 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-11-25 23:27:34,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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) [2022-11-25 23:27:34,149 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-11-25 23:27:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 23:27:34,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:27:34,149 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:27:34,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:27:34,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:27:34,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:27:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:27:34,357 INFO L85 PathProgramCache]: Analyzing trace with hash 883853987, now seen corresponding path program 2 times [2022-11-25 23:27:34,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:27:34,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332482455] [2022-11-25 23:27:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:27:34,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:27:34,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:27:34,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175264264] [2022-11-25 23:27:34,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:27:34,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:27:34,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:27:34,379 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:27:34,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:27:34,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:27:34,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:27:34,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:27:34,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:27:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:27:34,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:27:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:27:34,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:27:34,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332482455] [2022-11-25 23:27:34,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:27:34,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175264264] [2022-11-25 23:27:34,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175264264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:27:34,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [213544825] [2022-11-25 23:27:34,593 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 23:27:34,594 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:27:34,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:27:34,594 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:27:34,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:27:34,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:34,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:34,741 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 23:27:34,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 23:27:34,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:34,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:34,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:34,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-11-25 23:27:34,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:34,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:34,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-25 23:27:35,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:35,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:27:35,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:35,202 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-25 23:27:35,202 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 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-25 23:27:35,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:35,381 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:35,382 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:35,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:35,458 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:35,459 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:35,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:35,663 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:27:35,664 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-25 23:27:35,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:35,709 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:35,709 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:35,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:35,763 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:35,763 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:35,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:35,841 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:35,841 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:35,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:35,899 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:35,899 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:35,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:35,947 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:35,948 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:35,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:35,991 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:35,992 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:36,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:36,062 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:36,062 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:36,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:36,111 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:36,111 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:36,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:36,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:36,193 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-25 23:27:36,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 58 [2022-11-25 23:27:36,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:36,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:36,328 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:27:36,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:27:36,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:36,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:36,454 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:27:36,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:27:36,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:36,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:36,582 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:27:36,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:27:36,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:36,727 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:27:36,727 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-25 23:27:36,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:36,768 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:36,769 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:36,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:27:36,814 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:27:36,814 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:27:36,819 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:27:37,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '865#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |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___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 23:27:37,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:27:37,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:27:37,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-25 23:27:37,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137094237] [2022-11-25 23:27:37,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:27:37,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:27:37,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:27:37,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:27:37,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:27:37,978 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:27:38,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:27:38,242 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2022-11-25 23:27:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:27:38,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-25 23:27:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:27:38,245 INFO L225 Difference]: With dead ends: 171 [2022-11-25 23:27:38,245 INFO L226 Difference]: Without dead ends: 141 [2022-11-25 23:27:38,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:27:38,246 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 114 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:27:38,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 16 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:27:38,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-25 23:27:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 92. [2022-11-25 23:27:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 91 states have internal predecessors, (111), 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) [2022-11-25 23:27:38,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2022-11-25 23:27:38,293 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 26 [2022-11-25 23:27:38,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:27:38,294 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2022-11-25 23:27:38,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:27:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2022-11-25 23:27:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 23:27:38,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:27:38,296 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:27:38,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:27:38,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:27:38,502 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:27:38,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:27:38,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1008971561, now seen corresponding path program 3 times [2022-11-25 23:27:38,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:27:38,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922376343] [2022-11-25 23:27:38,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:27:38,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:27:38,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:27:38,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708360742] [2022-11-25 23:27:38,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:27:38,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:27:38,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:27:38,547 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:27:38,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:35:18,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:35:18,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:35:18,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:35:18,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2022-11-25 23:35:18,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 79 proven. 10 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2022-11-25 23:35:18,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:18,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922376343] [2022-11-25 23:35:18,655 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:35:18,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708360742] [2022-11-25 23:35:18,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708360742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:18,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887871186] [2022-11-25 23:35:18,658 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 23:35:18,659 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:18,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:18,659 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:18,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:18,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:18,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:18,835 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 23:35:18,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 23:35:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:18,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:18,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:18,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-11-25 23:35:18,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:18,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:18,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 55 [2022-11-25 23:35:19,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:19,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:19,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:19,406 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-25 23:35:19,406 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 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-25 23:35:19,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:19,576 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:19,577 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:19,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:19,637 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:19,637 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:19,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:19,842 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:35:19,843 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-25 23:35:19,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:19,887 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:19,887 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:19,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:19,936 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:19,936 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:20,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,018 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:35:20,018 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-25 23:35:20,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,054 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:20,054 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:20,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,115 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:20,115 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:20,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,168 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:20,168 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:20,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,233 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:20,234 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:20,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,331 INFO L321 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-25 23:35:20,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 58 [2022-11-25 23:35:20,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,478 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:35:20,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:35:20,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,652 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:35:20,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:35:20,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,795 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:35:20,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:35:20,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:20,939 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:20,940 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:20,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:21,000 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:21,000 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:21,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:21,052 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:21,052 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:21,065 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:24,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1851#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |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___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:24,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:24,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:35:24,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-25 23:35:24,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809942644] [2022-11-25 23:35:24,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:24,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:35:24,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:24,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:35:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:35:24,907 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:25,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:25,303 INFO L93 Difference]: Finished difference Result 286 states and 398 transitions. [2022-11-25 23:35:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:35:25,304 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-25 23:35:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:25,306 INFO L225 Difference]: With dead ends: 286 [2022-11-25 23:35:25,306 INFO L226 Difference]: Without dead ends: 201 [2022-11-25 23:35:25,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 194 SyntacticMatches, 26 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:35:25,307 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 180 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:25,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 34 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:35:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-25 23:35:25,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 182. [2022-11-25 23:35:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.143646408839779) internal successors, (207), 181 states have internal predecessors, (207), 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) [2022-11-25 23:35:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 207 transitions. [2022-11-25 23:35:25,380 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 207 transitions. Word has length 80 [2022-11-25 23:35:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:25,381 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 207 transitions. [2022-11-25 23:35:25,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:25,381 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 207 transitions. [2022-11-25 23:35:25,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-25 23:35:25,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:25,384 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:25,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:35:25,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 23:35:25,596 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:25,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:25,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1816079575, now seen corresponding path program 4 times [2022-11-25 23:35:25,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:25,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480029831] [2022-11-25 23:35:25,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:25,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:25,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:35:25,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114783130] [2022-11-25 23:35:25,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:35:25,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:25,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:25,729 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:25,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:35:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:26,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:35:26,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2868 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2022-11-25 23:35:26,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2868 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2022-11-25 23:35:26,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:26,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480029831] [2022-11-25 23:35:26,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 23:35:26,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114783130] [2022-11-25 23:35:26,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114783130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:26,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [578952887] [2022-11-25 23:35:26,772 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-25 23:35:26,772 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:26,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:26,772 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:26,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:26,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:26,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:26,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:26,952 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-25 23:35:26,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-25 23:35:26,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:26,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:26,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:26,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2022-11-25 23:35:27,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:27,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:27,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-25 23:35:27,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:27,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:27,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:27,414 INFO L321 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-25 23:35:27,414 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 2 case distinctions, treesize of input 435 treesize of output 410 [2022-11-25 23:35:27,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:27,572 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:27,573 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:27,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:27,625 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:27,625 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:27,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:27,823 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:35:27,823 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-25 23:35:27,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:27,867 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:27,868 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:27,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:27,932 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:27,932 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:27,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,015 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:35:28,015 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-25 23:35:28,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,058 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:28,059 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:28,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,110 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:35:28,110 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-25 23:35:28,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,163 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:28,164 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:28,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,224 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:28,225 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:28,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,311 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:35:28,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:35:28,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,461 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:35:28,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:35:28,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,639 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:35:28,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:35:28,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,785 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-25 23:35:28,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-25 23:35:28,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,911 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 23:35:28,911 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-25 23:35:28,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:28,960 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:28,961 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:28,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:29,014 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-25 23:35:29,015 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-25 23:35:29,021 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:35,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3685#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |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___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:35,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:35,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:35:35,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-25 23:35:35,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094698377] [2022-11-25 23:35:35,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:35,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 23:35:35,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:35,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 23:35:35,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=588, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:35:35,819 INFO L87 Difference]: Start difference. First operand 182 states and 207 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 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) [2022-11-25 23:35:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:36,732 INFO L93 Difference]: Finished difference Result 574 states and 770 transitions. [2022-11-25 23:35:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 23:35:36,733 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 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 152 [2022-11-25 23:35:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:36,736 INFO L225 Difference]: With dead ends: 574 [2022-11-25 23:35:36,736 INFO L226 Difference]: Without dead ends: 405 [2022-11-25 23:35:36,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 374 SyntacticMatches, 50 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=723, Invalid=1083, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 23:35:36,739 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 400 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:36,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 70 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:35:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-11-25 23:35:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 362. [2022-11-25 23:35:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.105263157894737) internal successors, (399), 361 states have internal predecessors, (399), 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) [2022-11-25 23:35:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 399 transitions. [2022-11-25 23:35:36,855 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 399 transitions. Word has length 152 [2022-11-25 23:35:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:36,856 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 399 transitions. [2022-11-25 23:35:36,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 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) [2022-11-25 23:35:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 399 transitions. [2022-11-25 23:35:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-11-25 23:35:36,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:36,862 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:36,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:35:37,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 23:35:37,077 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:37,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:37,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1993710377, now seen corresponding path program 5 times [2022-11-25 23:35:37,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:37,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820335892] [2022-11-25 23:35:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:37,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:37,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 23:35:37,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157157027] [2022-11-25 23:35:37,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:35:37,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:37,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:37,299 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:37,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0509ebde-fd6d-4766-a64a-acfee9def9ae/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process