./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/xor4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/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_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/xor4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/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_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/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 90b7e6947bda838aad0c5e01877b9a712c46c1a2dc1a2af9f1fb1c6266593b6a --- 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 [2022-11-26 00:58:32,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:58:32,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:58:32,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:58:32,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:58:32,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:58:32,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:58:32,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:58:32,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:58:32,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:58:32,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:58:32,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:58:32,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:58:32,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:58:32,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:58:32,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:58:32,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:58:32,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:58:32,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:58:32,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:58:32,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:58:32,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:58:32,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:58:32,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:58:32,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:58:32,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:58:32,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:58:32,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:58:32,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:58:32,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:58:32,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:58:32,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:58:32,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:58:32,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:58:32,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:58:32,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:58:32,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:58:32,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:58:32,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:58:32,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:58:32,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:58:32,496 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:58:32,534 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:58:32,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:58:32,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:58:32,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:58:32,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:58:32,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:58:32,536 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:58:32,537 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:58:32,537 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:58:32,537 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:58:32,537 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:58:32,538 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:58:32,538 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:58:32,538 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:58:32,538 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:58:32,539 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:58:32,539 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:58:32,539 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:58:32,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:58:32,540 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:58:32,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:58:32,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:58:32,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:58:32,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:58:32,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:58:32,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:58:32,542 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:58:32,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:58:32,542 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:58:32,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:58:32,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:58:32,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:58:32,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:58:32,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:58:32,544 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:58:32,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:58:32,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:58:32,544 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:58:32,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:58:32,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:58:32,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:58:32,545 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_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90b7e6947bda838aad0c5e01877b9a712c46c1a2dc1a2af9f1fb1c6266593b6a [2022-11-26 00:58:32,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:58:32,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:58:32,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:58:32,854 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:58:32,855 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:58:32,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-crafted/xor4.i [2022-11-26 00:58:35,882 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:58:36,076 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:58:36,080 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/sv-benchmarks/c/array-crafted/xor4.i [2022-11-26 00:58:36,088 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/data/9fef36fd9/64a2c6c9a92a47c4b53dcd31b251025b/FLAG65a3c5687 [2022-11-26 00:58:36,107 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/data/9fef36fd9/64a2c6c9a92a47c4b53dcd31b251025b [2022-11-26 00:58:36,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:58:36,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:58:36,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:58:36,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:58:36,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:58:36,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:58:36" (1/1) ... [2022-11-26 00:58:36,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457d167e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36, skipping insertion in model container [2022-11-26 00:58:36,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:58:36" (1/1) ... [2022-11-26 00:58:36,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:58:36,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:58:36,353 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_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/sv-benchmarks/c/array-crafted/xor4.i[1303,1316] [2022-11-26 00:58:36,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:58:36,368 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:58:36,388 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_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/sv-benchmarks/c/array-crafted/xor4.i[1303,1316] [2022-11-26 00:58:36,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:58:36,403 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:58:36,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36 WrapperNode [2022-11-26 00:58:36,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:58:36,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:58:36,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:58:36,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:58:36,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36" (1/1) ... [2022-11-26 00:58:36,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36" (1/1) ... [2022-11-26 00:58:36,444 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2022-11-26 00:58:36,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:58:36,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:58:36,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:58:36,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:58:36,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36" (1/1) ... [2022-11-26 00:58:36,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36" (1/1) ... [2022-11-26 00:58:36,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36" (1/1) ... [2022-11-26 00:58:36,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36" (1/1) ... [2022-11-26 00:58:36,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36" (1/1) ... [2022-11-26 00:58:36,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36" (1/1) ... [2022-11-26 00:58:36,469 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36" (1/1) ... [2022-11-26 00:58:36,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36" (1/1) ... [2022-11-26 00:58:36,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:58:36,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:58:36,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:58:36,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:58:36,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36" (1/1) ... [2022-11-26 00:58:36,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:58:36,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:36,537 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:58:36,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:58:36,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:58:36,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:58:36,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:58:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:58:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:58:36,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:58:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:58:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2022-11-26 00:58:36,585 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2022-11-26 00:58:36,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:58:36,694 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:58:36,696 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:58:36,915 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:58:36,993 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:58:36,993 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-26 00:58:36,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:58:36 BoogieIcfgContainer [2022-11-26 00:58:36,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:58:36,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:58:36,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:58:37,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:58:37,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:58:36" (1/3) ... [2022-11-26 00:58:37,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503e7aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:58:37, skipping insertion in model container [2022-11-26 00:58:37,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:36" (2/3) ... [2022-11-26 00:58:37,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503e7aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:58:37, skipping insertion in model container [2022-11-26 00:58:37,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:58:36" (3/3) ... [2022-11-26 00:58:37,006 INFO L112 eAbstractionObserver]: Analyzing ICFG xor4.i [2022-11-26 00:58:37,039 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:58:37,040 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:58:37,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:58:37,095 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;@20478353, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:58:37,095 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:58:37,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:58:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:58:37,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:37,105 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:37,106 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:37,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:37,111 INFO L85 PathProgramCache]: Analyzing trace with hash -491286142, now seen corresponding path program 1 times [2022-11-26 00:58:37,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:37,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310882946] [2022-11-26 00:58:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:37,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:58:37,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:37,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310882946] [2022-11-26 00:58:37,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310882946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:37,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:58:37,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:58:37,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709942641] [2022-11-26 00:58:37,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:37,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:37,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:37,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:37,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:58:37,505 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:58:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:37,587 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-26 00:58:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:37,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-26 00:58:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:37,597 INFO L225 Difference]: With dead ends: 33 [2022-11-26 00:58:37,597 INFO L226 Difference]: Without dead ends: 16 [2022-11-26 00:58:37,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:58:37,604 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:37,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:58:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-26 00:58:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-26 00:58:37,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:58:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-26 00:58:37,637 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-11-26 00:58:37,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:37,637 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-26 00:58:37,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:58:37,638 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-26 00:58:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:58:37,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:37,640 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:37,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:58:37,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:37,641 INFO L85 PathProgramCache]: Analyzing trace with hash -292682821, now seen corresponding path program 1 times [2022-11-26 00:58:37,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:37,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328327643] [2022-11-26 00:58:37,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:37,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:58:37,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:37,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328327643] [2022-11-26 00:58:37,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328327643] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:37,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226359869] [2022-11-26 00:58:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:37,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:37,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:37,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:37,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:58:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:37,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:58:37,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:58:37,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:58:37,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226359869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:37,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:58:37,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-26 00:58:37,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256878712] [2022-11-26 00:58:37,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:37,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:37,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:37,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:58:37,922 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:58:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:37,943 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-26 00:58:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:37,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-26 00:58:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:37,945 INFO L225 Difference]: With dead ends: 29 [2022-11-26 00:58:37,945 INFO L226 Difference]: Without dead ends: 17 [2022-11-26 00:58:37,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:58:37,947 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:37,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:37,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-26 00:58:37,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-26 00:58:37,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:58:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-26 00:58:37,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-11-26 00:58:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:37,954 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-26 00:58:37,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:58:37,955 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-26 00:58:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:58:37,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:37,956 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:37,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:38,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:38,162 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:38,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:38,163 INFO L85 PathProgramCache]: Analyzing trace with hash -746001070, now seen corresponding path program 1 times [2022-11-26 00:58:38,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:38,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476631440] [2022-11-26 00:58:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:38,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:58:38,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:38,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476631440] [2022-11-26 00:58:38,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476631440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:38,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633684118] [2022-11-26 00:58:38,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:38,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:38,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:38,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:38,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:58:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:38,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:58:38,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:58:38,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:58:38,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633684118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:38,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:58:38,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-26 00:58:38,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510662559] [2022-11-26 00:58:38,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:38,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:58:38,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:38,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:58:38,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:58:38,544 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:58:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:38,578 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-26 00:58:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:58:38,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-26 00:58:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:38,580 INFO L225 Difference]: With dead ends: 27 [2022-11-26 00:58:38,580 INFO L226 Difference]: Without dead ends: 18 [2022-11-26 00:58:38,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:58:38,583 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:38,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:38,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-26 00:58:38,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-26 00:58:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:58:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-26 00:58:38,595 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-11-26 00:58:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:38,596 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-26 00:58:38,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:58:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-26 00:58:38,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:58:38,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:38,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:38,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:38,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-26 00:58:38,803 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:38,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:38,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1071769984, now seen corresponding path program 1 times [2022-11-26 00:58:38,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:38,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426648803] [2022-11-26 00:58:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:38,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:58:38,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:38,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426648803] [2022-11-26 00:58:38,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426648803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:38,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630748584] [2022-11-26 00:58:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:38,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:38,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:38,883 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:38,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:58:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:38,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:58:38,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:58:39,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:58:39,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630748584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:39,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1182388759] [2022-11-26 00:58:39,059 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:58:39,059 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:39,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:39,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:39,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:39,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:39,188 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:58:39,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:58:39,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:39,223 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:58:39,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:58:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:39,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:58:39,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:39,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:39,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:39,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:39,478 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 00:58:39,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-26 00:58:39,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:58:39,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:39,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:58:40,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:40,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 00:58:40,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:40,094 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-26 00:58:40,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-26 00:58:40,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:58:40,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:58:40,319 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-26 00:58:40,404 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:41,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (exists ((v_xor_~res~0_BEFORE_RETURN_6 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_6 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_6 4294967296) (+ (mod v_xor_~res~0_BEFORE_RETURN_6 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2022-11-26 00:58:41,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:41,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:41,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-26 00:58:41,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029790083] [2022-11-26 00:58:41,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:41,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:58:41,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:41,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:58:41,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:58:41,327 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:58:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:41,356 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-26 00:58:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:58:41,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-11-26 00:58:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:41,357 INFO L225 Difference]: With dead ends: 36 [2022-11-26 00:58:41,358 INFO L226 Difference]: Without dead ends: 21 [2022-11-26 00:58:41,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:58:41,359 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:41,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:41,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-26 00:58:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-26 00:58:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:58:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-26 00:58:41,363 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-11-26 00:58:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:41,364 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-26 00:58:41,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:58:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-26 00:58:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:58:41,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:41,365 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:41,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:41,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:41,576 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:41,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:41,576 INFO L85 PathProgramCache]: Analyzing trace with hash 856384007, now seen corresponding path program 2 times [2022-11-26 00:58:41,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:41,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55928698] [2022-11-26 00:58:41,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:41,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:58:41,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:41,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55928698] [2022-11-26 00:58:41,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55928698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:41,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787976054] [2022-11-26 00:58:41,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:58:41,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:41,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:41,671 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:41,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:58:41,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:58:41,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:58:41,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:58:41,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:58:41,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:58:41,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787976054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:41,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064527335] [2022-11-26 00:58:41,796 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:58:41,796 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:41,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:41,797 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:41,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:41,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:41,828 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:58:41,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:58:41,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:41,861 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:58:41,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:58:41,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:41,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-26 00:58:41,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:41,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:41,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:41,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:41,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:41,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:41,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:41,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:41,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:42,021 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-26 00:58:42,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-26 00:58:42,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:58:42,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:42,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:58:42,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:42,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:42,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 00:58:42,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:42,363 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:58:42,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 00:58:42,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:58:42,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:58:42,531 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-26 00:58:42,606 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:47,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_xor_~res~0_BEFORE_RETURN_12 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_12 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_12 4294967296) (+ (mod v_xor_~res~0_BEFORE_RETURN_12 4294967296) (- 4294967296))))) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2022-11-26 00:58:47,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:47,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:47,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-26 00:58:47,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245371644] [2022-11-26 00:58:47,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:47,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:58:47,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:47,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:58:47,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:58:47,734 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:58:47,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:47,775 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-26 00:58:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:58:47,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-11-26 00:58:47,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:47,780 INFO L225 Difference]: With dead ends: 38 [2022-11-26 00:58:47,780 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 00:58:47,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:58:47,781 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:47,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 00:58:47,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-26 00:58:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:58:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-26 00:58:47,785 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-11-26 00:58:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:47,785 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-26 00:58:47,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:58:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-26 00:58:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:58:47,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:47,790 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:47,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:47,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:47,997 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:47,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1091113086, now seen corresponding path program 3 times [2022-11-26 00:58:47,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:47,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72076818] [2022-11-26 00:58:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:47,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-26 00:58:48,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:48,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72076818] [2022-11-26 00:58:48,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72076818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:48,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308979073] [2022-11-26 00:58:48,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:58:48,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:48,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:48,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:48,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:58:48,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:58:48,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:58:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:58:48,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-26 00:58:48,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-26 00:58:48,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308979073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:48,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [846890126] [2022-11-26 00:58:48,395 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:58:48,395 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:48,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:48,396 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:48,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:48,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:48,434 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:58:48,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:58:48,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:48,466 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:58:48,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:58:48,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:48,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:58:48,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:48,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:48,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:48,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:48,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:48,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:48,624 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 00:58:48,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-26 00:58:48,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:58:48,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:48,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:58:48,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:48,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:48,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 00:58:48,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:49,010 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:58:49,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 00:58:49,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:58:49,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:58:49,164 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-26 00:58:49,252 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:54,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (exists ((v_xor_~res~0_BEFORE_RETURN_18 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_18 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_18 4294967296) (+ (- 4294967296) (mod v_xor_~res~0_BEFORE_RETURN_18 4294967296))))) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2022-11-26 00:58:54,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:54,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:54,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2022-11-26 00:58:54,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987603959] [2022-11-26 00:58:54,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:54,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:58:54,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:54,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:58:54,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:58:54,349 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 00:58:54,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:54,403 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-26 00:58:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:58:54,405 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2022-11-26 00:58:54,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:54,405 INFO L225 Difference]: With dead ends: 49 [2022-11-26 00:58:54,405 INFO L226 Difference]: Without dead ends: 31 [2022-11-26 00:58:54,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:58:54,407 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:54,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:58:54,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-26 00:58:54,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-26 00:58:54,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:58:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-26 00:58:54,413 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-11-26 00:58:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:54,413 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-26 00:58:54,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 00:58:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-26 00:58:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-26 00:58:54,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:54,415 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:54,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:54,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:54,621 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:54,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:54,622 INFO L85 PathProgramCache]: Analyzing trace with hash 947141090, now seen corresponding path program 4 times [2022-11-26 00:58:54,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:54,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982961202] [2022-11-26 00:58:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:54,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 00:58:54,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:54,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982961202] [2022-11-26 00:58:54,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982961202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:54,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407624374] [2022-11-26 00:58:54,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:58:54,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:54,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:54,928 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:54,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:58:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:55,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:58:55,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 00:58:55,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 00:58:55,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407624374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:55,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [653630456] [2022-11-26 00:58:55,350 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:58:55,350 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:55,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:55,350 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:55,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:55,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,386 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:58:55,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:58:55,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:58:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-26 00:58:55,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,540 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-26 00:58:55,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-26 00:58:55,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:58:55,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:58:55,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:55,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 00:58:55,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,818 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:58:55,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 00:58:55,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:58:55,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:58:55,961 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-26 00:58:56,031 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:59:03,162 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1574#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2022-11-26 00:59:03,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:59:03,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:03,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2022-11-26 00:59:03,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760167097] [2022-11-26 00:59:03,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:03,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:59:03,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:03,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:59:03,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1046, Unknown=1, NotChecked=0, Total=1406 [2022-11-26 00:59:03,166 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:59:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:03,228 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-11-26 00:59:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:59:03,229 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-11-26 00:59:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:03,230 INFO L225 Difference]: With dead ends: 62 [2022-11-26 00:59:03,230 INFO L226 Difference]: Without dead ends: 43 [2022-11-26 00:59:03,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=359, Invalid=1046, Unknown=1, NotChecked=0, Total=1406 [2022-11-26 00:59:03,231 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:03,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:59:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-26 00:59:03,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-26 00:59:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:59:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-26 00:59:03,237 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2022-11-26 00:59:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:03,238 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-26 00:59:03,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:59:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-26 00:59:03,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-26 00:59:03,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:03,240 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:03,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:03,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:59:03,446 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:59:03,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:03,447 INFO L85 PathProgramCache]: Analyzing trace with hash 961965218, now seen corresponding path program 5 times [2022-11-26 00:59:03,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:03,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355390052] [2022-11-26 00:59:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:03,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 00:59:04,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:04,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355390052] [2022-11-26 00:59:04,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355390052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:04,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967153761] [2022-11-26 00:59:04,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:59:04,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:04,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:04,321 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:04,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:59:04,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:59:04,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:59:04,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:59:04,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-26 00:59:04,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-26 00:59:04,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967153761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:04,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1272895545] [2022-11-26 00:59:04,689 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:59:04,689 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:04,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:59:04,690 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:59:04,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:59:04,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:04,729 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:59:04,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:59:04,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:04,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:59:04,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:04,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-26 00:59:04,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:04,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:04,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:04,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:04,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:04,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:04,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:04,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:04,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:04,876 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-26 00:59:04,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-26 00:59:04,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:59:05,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:05,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:59:05,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:05,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 00:59:05,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:05,173 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-26 00:59:05,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-26 00:59:05,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:59:05,225 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:59:05,330 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-26 00:59:05,413 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:59:06,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2139#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (exists ((v_xor_~res~0_BEFORE_RETURN_29 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_29 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_29 4294967296) (+ (mod v_xor_~res~0_BEFORE_RETURN_29 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2022-11-26 00:59:06,708 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:59:06,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:06,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2022-11-26 00:59:06,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305066591] [2022-11-26 00:59:06,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:06,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 00:59:06,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 00:59:06,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:59:06,711 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:59:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:06,812 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-11-26 00:59:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-26 00:59:06,812 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-11-26 00:59:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:06,813 INFO L225 Difference]: With dead ends: 69 [2022-11-26 00:59:06,813 INFO L226 Difference]: Without dead ends: 50 [2022-11-26 00:59:06,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:59:06,815 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:06,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:59:06,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-26 00:59:06,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-26 00:59:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:59:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-26 00:59:06,822 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2022-11-26 00:59:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:06,823 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-26 00:59:06,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:59:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-26 00:59:06,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-26 00:59:06,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:06,825 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:06,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-26 00:59:07,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:59:07,030 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:59:07,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:07,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2071215813, now seen corresponding path program 6 times [2022-11-26 00:59:07,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:07,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487669192] [2022-11-26 00:59:07,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:07,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:59:08,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:08,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487669192] [2022-11-26 00:59:08,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487669192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:08,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319745486] [2022-11-26 00:59:08,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:59:08,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:08,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:08,236 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:08,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:59:08,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:59:08,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:59:08,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:59:08,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:59:08,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:59:09,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319745486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [10004028] [2022-11-26 00:59:09,336 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:59:09,336 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:09,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:59:09,337 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:59:09,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:59:09,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,368 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:59:09,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:59:09,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:59:09,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-26 00:59:09,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,525 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-26 00:59:09,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-26 00:59:09,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:59:09,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:59:09,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 00:59:09,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:09,789 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-26 00:59:09,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-26 00:59:09,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:59:09,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:59:09,972 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-26 00:59:10,069 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:59:15,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2862#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2022-11-26 00:59:15,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:59:15,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:15,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2022-11-26 00:59:15,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684620607] [2022-11-26 00:59:15,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:15,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-26 00:59:15,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:15,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-26 00:59:15,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 00:59:15,276 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:59:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:15,385 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2022-11-26 00:59:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-26 00:59:15,386 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2022-11-26 00:59:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:15,388 INFO L225 Difference]: With dead ends: 100 [2022-11-26 00:59:15,388 INFO L226 Difference]: Without dead ends: 75 [2022-11-26 00:59:15,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 00:59:15,390 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:15,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:59:15,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-26 00:59:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-26 00:59:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:59:15,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-11-26 00:59:15,404 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2022-11-26 00:59:15,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:15,405 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-11-26 00:59:15,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:59:15,406 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-11-26 00:59:15,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-26 00:59:15,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:15,408 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:15,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:15,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:15,615 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:59:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1741539426, now seen corresponding path program 7 times [2022-11-26 00:59:15,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:15,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37834739] [2022-11-26 00:59:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:15,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:59:18,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:18,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37834739] [2022-11-26 00:59:18,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37834739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:18,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537237112] [2022-11-26 00:59:18,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:59:18,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:18,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:18,648 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:18,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:59:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:18,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-26 00:59:18,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:59:19,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:59:22,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537237112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:22,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1689248763] [2022-11-26 00:59:22,139 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:59:22,139 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:22,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:59:22,140 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:59:22,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:59:22,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:22,177 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:59:22,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:59:22,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:22,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:59:22,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:22,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:59:22,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:22,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:22,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:22,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:22,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:22,326 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 00:59:22,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-26 00:59:22,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:59:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:22,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:59:22,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:22,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:22,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 00:59:22,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:22,609 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:59:22,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 00:59:22,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:59:22,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:59:22,764 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-26 00:59:22,835 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:59:24,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3897#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (exists ((v_xor_~res~0_BEFORE_RETURN_41 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_41 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_41 4294967296) (+ (- 4294967296) (mod v_xor_~res~0_BEFORE_RETURN_41 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2022-11-26 00:59:24,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:59:24,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:24,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2022-11-26 00:59:24,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827510292] [2022-11-26 00:59:24,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:24,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-26 00:59:24,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:24,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-26 00:59:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-26 00:59:24,302 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:59:24,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:24,496 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2022-11-26 00:59:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-26 00:59:24,497 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2022-11-26 00:59:24,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:24,501 INFO L225 Difference]: With dead ends: 150 [2022-11-26 00:59:24,501 INFO L226 Difference]: Without dead ends: 125 [2022-11-26 00:59:24,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-11-26 00:59:24,509 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:24,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:59:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-26 00:59:24,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-26 00:59:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:59:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-11-26 00:59:24,536 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 100 [2022-11-26 00:59:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:24,537 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-11-26 00:59:24,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:59:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-11-26 00:59:24,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-26 00:59:24,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:24,549 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:24,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:24,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:59:24,750 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:59:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:24,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1928403586, now seen corresponding path program 8 times [2022-11-26 00:59:24,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:24,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25021448] [2022-11-26 00:59:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:24,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-11-26 00:59:32,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:32,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25021448] [2022-11-26 00:59:32,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25021448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:32,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72698128] [2022-11-26 00:59:32,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:59:32,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:32,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:32,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:32,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:59:33,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:59:33,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:59:33,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:59:33,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2022-11-26 00:59:33,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2022-11-26 00:59:33,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72698128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:33,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [78879587] [2022-11-26 00:59:33,480 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:59:33,480 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:33,481 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:59:33,481 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:59:33,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:59:33,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,507 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:59:33,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:59:33,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,533 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:59:33,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:59:33,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-26 00:59:33,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,673 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-26 00:59:33,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-26 00:59:33,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:59:33,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:59:33,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:33,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 00:59:33,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:33,944 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:59:33,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 00:59:33,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:59:33,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:59:34,091 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-26 00:59:34,156 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:59:38,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5438#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (exists ((v_xor_~res~0_BEFORE_RETURN_48 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_48 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_48 4294967296) (+ (mod v_xor_~res~0_BEFORE_RETURN_48 4294967296) (- 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2022-11-26 00:59:38,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:59:38,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:38,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2022-11-26 00:59:38,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132241897] [2022-11-26 00:59:38,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:38,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-26 00:59:38,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:38,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-26 00:59:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2022-11-26 00:59:38,403 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:59:38,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:38,600 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2022-11-26 00:59:38,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-26 00:59:38,601 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-11-26 00:59:38,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:38,602 INFO L225 Difference]: With dead ends: 155 [2022-11-26 00:59:38,602 INFO L226 Difference]: Without dead ends: 130 [2022-11-26 00:59:38,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2022-11-26 00:59:38,605 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:38,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:59:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-26 00:59:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-11-26 00:59:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:59:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-11-26 00:59:38,620 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 150 [2022-11-26 00:59:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:38,621 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-11-26 00:59:38,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:59:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-11-26 00:59:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-26 00:59:38,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:38,623 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:38,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:38,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:59:38,831 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:59:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2040643067, now seen corresponding path program 9 times [2022-11-26 00:59:38,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:38,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489432306] [2022-11-26 00:59:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:38,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-26 00:59:46,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:46,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489432306] [2022-11-26 00:59:46,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489432306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:46,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086548974] [2022-11-26 00:59:46,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:59:46,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:46,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:46,127 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:46,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:59:46,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:59:46,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:59:46,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-26 00:59:46,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-26 00:59:46,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-26 00:59:59,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086548974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:59,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499434763] [2022-11-26 00:59:59,337 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:59:59,337 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:59,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:59:59,337 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:59:59,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:59:59,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,372 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:59:59,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:59:59,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:59:59,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-26 00:59:59,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,495 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-11-26 00:59:59,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 12 case distinctions, treesize of input 294 treesize of output 275 [2022-11-26 00:59:59,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:59:59,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:59:59,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:59,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 00:59:59,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:59,758 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:59:59,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 00:59:59,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:59:59,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:59:59,947 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-26 01:00:00,017 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:00:06,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7125#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (exists ((v_xor_~res~0_BEFORE_RETURN_54 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_54 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_54 4294967296) (+ (mod v_xor_~res~0_BEFORE_RETURN_54 4294967296) (- 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2022-11-26 01:00:06,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:00:06,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:06,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 102] total 203 [2022-11-26 01:00:06,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910123135] [2022-11-26 01:00:06,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:06,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-26 01:00:06,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:06,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-26 01:00:06,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20563, Invalid=25877, Unknown=0, NotChecked=0, Total=46440 [2022-11-26 01:00:06,178 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 01:00:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:06,674 INFO L93 Difference]: Finished difference Result 260 states and 368 transitions. [2022-11-26 01:00:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-26 01:00:06,675 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 155 [2022-11-26 01:00:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:06,677 INFO L225 Difference]: With dead ends: 260 [2022-11-26 01:00:06,677 INFO L226 Difference]: Without dead ends: 231 [2022-11-26 01:00:06,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=20563, Invalid=25877, Unknown=0, NotChecked=0, Total=46440 [2022-11-26 01:00:06,710 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:06,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:00:06,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-26 01:00:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-11-26 01:00:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0132743362831858) internal successors, (229), 226 states have internal predecessors, (229), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:00:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2022-11-26 01:00:06,751 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 155 [2022-11-26 01:00:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:06,752 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2022-11-26 01:00:06,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 01:00:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2022-11-26 01:00:06,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-11-26 01:00:06,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:06,758 INFO L195 NwaCegarLoop]: trace histogram [200, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:06,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:06,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 01:00:06,967 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:06,968 INFO L85 PathProgramCache]: Analyzing trace with hash -130501150, now seen corresponding path program 10 times [2022-11-26 01:00:06,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:06,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947104764] [2022-11-26 01:00:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:06,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-26 01:00:33,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:33,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947104764] [2022-11-26 01:00:33,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947104764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:33,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205807508] [2022-11-26 01:00:33,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:00:33,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:33,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:33,444 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:33,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:00:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:34,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 2100 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-26 01:00:34,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-26 01:00:34,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:01:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-26 01:01:26,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205807508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:01:26,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1960875331] [2022-11-26 01:01:26,202 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:01:26,202 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:26,202 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:01:26,202 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:01:26,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:01:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:26,232 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:01:26,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 01:01:26,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:26,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 01:01:26,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:26,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 01:01:26,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:26,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:26,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:26,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:26,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:26,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:26,373 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 01:01:26,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-26 01:01:26,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:01:26,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:26,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 01:01:26,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:26,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:26,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 01:01:26,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:26,632 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 01:01:26,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 01:01:26,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 01:01:26,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 01:01:26,772 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-26 01:01:26,833 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:01:34,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10032#(and (exists ((v_xor_~res~0_BEFORE_RETURN_60 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_60 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_60 4294967296) (+ (mod v_xor_~res~0_BEFORE_RETURN_60 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))) (= |#NULL.base| 0))' at error location [2022-11-26 01:01:34,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:01:34,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:01:34,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 202, 203] total 405 [2022-11-26 01:01:34,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886484099] [2022-11-26 01:01:34,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:01:34,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-26 01:01:34,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:34,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-26 01:01:34,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81870, Invalid=92436, Unknown=0, NotChecked=0, Total=174306 [2022-11-26 01:01:34,362 INFO L87 Difference]: Start difference. First operand 231 states and 235 transitions. Second operand has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 01:01:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:36,698 INFO L93 Difference]: Finished difference Result 462 states and 671 transitions. [2022-11-26 01:01:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-26 01:01:36,700 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 256 [2022-11-26 01:01:36,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:36,703 INFO L225 Difference]: With dead ends: 462 [2022-11-26 01:01:36,703 INFO L226 Difference]: Without dead ends: 433 [2022-11-26 01:01:36,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8674 ImplicationChecksByTransitivity, 75.8s TimeCoverageRelationStatistics Valid=81870, Invalid=92436, Unknown=0, NotChecked=0, Total=174306 [2022-11-26 01:01:36,715 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:36,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:01:36,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-26 01:01:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2022-11-26 01:01:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 428 states have (on average 1.0070093457943925) internal successors, (431), 428 states have internal predecessors, (431), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:01:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 437 transitions. [2022-11-26 01:01:36,739 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 437 transitions. Word has length 256 [2022-11-26 01:01:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:36,739 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 437 transitions. [2022-11-26 01:01:36,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 405 states have internal predecessors, (419), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 01:01:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 437 transitions. [2022-11-26 01:01:36,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2022-11-26 01:01:36,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:36,749 INFO L195 NwaCegarLoop]: trace histogram [402, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:36,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-26 01:01:36,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:36,958 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:36,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:36,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1150322050, now seen corresponding path program 11 times [2022-11-26 01:01:36,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:36,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788594836] [2022-11-26 01:01:36,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:36,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-26 01:03:24,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:24,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788594836] [2022-11-26 01:03:24,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788594836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:24,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612449908] [2022-11-26 01:03:24,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:03:24,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:24,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:24,303 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:24,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 01:03:24,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 01:03:24,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:03:24,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:03:24,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 246 proven. 21 refuted. 0 times theorem prover too weak. 81291 trivial. 0 not checked. [2022-11-26 01:03:26,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:03:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 81537 trivial. 0 not checked. [2022-11-26 01:03:27,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612449908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:03:27,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [643487417] [2022-11-26 01:03:27,575 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:03:27,575 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:03:27,576 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:03:27,576 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:03:27,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:27,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:27,603 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:03:27,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 01:03:27,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:27,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 01:03:27,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:27,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 01:03:27,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:27,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:27,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:27,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:27,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:27,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:27,733 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 01:03:27,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-26 01:03:27,823 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:03:27,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:27,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 01:03:27,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:27,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:27,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 01:03:27,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,003 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 01:03:28,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 01:03:28,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 01:03:28,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 01:03:28,128 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-26 01:03:28,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:38,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14973#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_xor_~res~0_BEFORE_RETURN_66 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_xor_~res~0_BEFORE_RETURN_66 4294967296) 2147483647) (mod v_xor_~res~0_BEFORE_RETURN_66 4294967296) (+ (mod v_xor_~res~0_BEFORE_RETURN_66 4294967296) (- 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))))' at error location [2022-11-26 01:03:38,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:03:38,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:03:38,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 9, 9] total 419 [2022-11-26 01:03:38,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561368949] [2022-11-26 01:03:38,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:03:38,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 419 states [2022-11-26 01:03:38,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 419 interpolants. [2022-11-26 01:03:38,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81989, Invalid=104203, Unknown=0, NotChecked=0, Total=186192 [2022-11-26 01:03:38,403 INFO L87 Difference]: Start difference. First operand 433 states and 437 transitions. Second operand has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 01:03:40,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:40,690 INFO L93 Difference]: Finished difference Result 471 states and 487 transitions. [2022-11-26 01:03:40,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 419 states. [2022-11-26 01:03:40,692 INFO L78 Accepts]: Start accepts. Automaton has has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 458 [2022-11-26 01:03:40,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:40,695 INFO L225 Difference]: With dead ends: 471 [2022-11-26 01:03:40,695 INFO L226 Difference]: Without dead ends: 442 [2022-11-26 01:03:40,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1777 GetRequests, 1347 SyntacticMatches, 0 SemanticMatches, 430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11136 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=81989, Invalid=104203, Unknown=0, NotChecked=0, Total=186192 [2022-11-26 01:03:40,707 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:40,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:03:40,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-26 01:03:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-11-26 01:03:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 437 states have (on average 1.0068649885583525) internal successors, (440), 437 states have internal predecessors, (440), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:03:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 446 transitions. [2022-11-26 01:03:40,731 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 446 transitions. Word has length 458 [2022-11-26 01:03:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:40,732 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 446 transitions. [2022-11-26 01:03:40,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 419 states, 419 states have (on average 1.0429594272076372) internal successors, (437), 419 states have internal predecessors, (437), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 01:03:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 446 transitions. [2022-11-26 01:03:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-11-26 01:03:40,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:40,742 INFO L195 NwaCegarLoop]: trace histogram [403, 30, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:40,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-26 01:03:40,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 01:03:40,949 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:40,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1264933371, now seen corresponding path program 12 times [2022-11-26 01:03:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:40,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248478637] [2022-11-26 01:03:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:40,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2022-11-26 01:05:33,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:33,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248478637] [2022-11-26 01:05:33,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248478637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:33,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437217664] [2022-11-26 01:05:33,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:05:33,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:33,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:33,307 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:33,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 01:05:34,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:05:34,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:05:34,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 3983 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-26 01:05:34,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2022-11-26 01:05:35,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:09:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2022-11-26 01:09:19,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437217664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:09:19,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [962521546] [2022-11-26 01:09:19,088 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:09:19,088 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:09:19,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:09:19,089 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:09:19,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:09:19,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:19,120 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:09:19,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 01:09:19,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:19,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 01:09:19,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:19,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 01:09:19,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:19,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:19,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:19,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:19,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:09:19,261 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-26 01:09:19,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 13 case distinctions, treesize of input 284 treesize of output 276 [2022-11-26 01:09:19,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 01:09:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:19,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 01:09:19,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:19,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 01:09:19,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:19,534 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-26 01:09:19,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-26 01:09:19,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 01:09:19,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 01:09:19,664 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 12 for LOIs [2022-11-26 01:09:19,716 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:09:30,888 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20396#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (or (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~0#1|)) (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~0#1|))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~ret~0#1| 2147483648)) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= |ULTIMATE.start_main_~ret~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~temp~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 399996 |ULTIMATE.start_main_~#x~0#1.offset|))))' at error location [2022-11-26 01:09:30,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:09:30,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:09:30,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [406, 405, 406] total 811 [2022-11-26 01:09:30,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056051849] [2022-11-26 01:09:30,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:09:30,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-11-26 01:09:30,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:30,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-11-26 01:09:30,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328514, Invalid=349637, Unknown=1, NotChecked=0, Total=678152 [2022-11-26 01:09:30,993 INFO L87 Difference]: Start difference. First operand 442 states and 446 transitions. Second operand has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 01:09:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:47,338 INFO L93 Difference]: Finished difference Result 884 states and 1296 transitions. [2022-11-26 01:09:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-11-26 01:09:47,340 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 467 [2022-11-26 01:09:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:47,344 INFO L225 Difference]: With dead ends: 884 [2022-11-26 01:09:47,344 INFO L226 Difference]: Without dead ends: 847 [2022-11-26 01:09:47,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1805 GetRequests, 983 SyntacticMatches, 0 SemanticMatches, 822 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17403 ImplicationChecksByTransitivity, 306.6s TimeCoverageRelationStatistics Valid=328514, Invalid=349637, Unknown=1, NotChecked=0, Total=678152 [2022-11-26 01:09:47,406 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:47,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:09:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-11-26 01:09:47,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2022-11-26 01:09:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 842 states have (on average 1.003562945368171) internal successors, (845), 842 states have internal predecessors, (845), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 01:09:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 851 transitions. [2022-11-26 01:09:47,442 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 851 transitions. Word has length 467 [2022-11-26 01:09:47,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:47,442 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 851 transitions. [2022-11-26 01:09:47,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 811 states have internal predecessors, (825), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 01:09:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 851 transitions. [2022-11-26 01:09:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2022-11-26 01:09:47,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:47,454 INFO L195 NwaCegarLoop]: trace histogram [808, 30, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:47,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:47,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2f54a6-5d23-4ec7-a4d0-22cd021a47f9/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 01:09:47,659 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1538108386, now seen corresponding path program 13 times [2022-11-26 01:09:47,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:47,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258003450] [2022-11-26 01:09:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:47,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat