./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bor4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/bor4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 530f2a23e46989c01d5f933930e2ae4d9f59000418a38b175b5a857a453825fc --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 11:34:42,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:34:42,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:34:42,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:34:42,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:34:42,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:34:42,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:34:42,354 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:34:42,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:34:42,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:34:42,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:34:42,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:34:42,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:34:42,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:34:42,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:34:42,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:34:42,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:34:42,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:34:42,363 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:34:42,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:34:42,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:34:42,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:34:42,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:34:42,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:34:42,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:34:42,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:34:42,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:34:42,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:34:42,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:34:42,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:34:42,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:34:42,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:34:42,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:34:42,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:34:42,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:34:42,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:34:42,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:34:42,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:34:42,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:34:42,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:34:42,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:34:42,377 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:34:42,392 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:34:42,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:34:42,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:34:42,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:34:42,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:34:42,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:34:42,393 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:34:42,393 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:34:42,393 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:34:42,393 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:34:42,394 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:34:42,394 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:34:42,394 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:34:42,394 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:34:42,394 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:34:42,394 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:34:42,395 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:34:42,395 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:34:42,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:34:42,396 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:34:42,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:34:42,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:34:42,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:34:42,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:34:42,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:34:42,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:34:42,397 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:34:42,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:34:42,397 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:34:42,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:34:42,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:34:42,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:34:42,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:34:42,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:34:42,398 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:34:42,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:34:42,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:34:42,398 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:34:42,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:34:42,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:34:42,399 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:34:42,399 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_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 530f2a23e46989c01d5f933930e2ae4d9f59000418a38b175b5a857a453825fc [2022-12-14 11:34:42,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:34:42,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:34:42,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:34:42,609 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:34:42,610 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:34:42,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-crafted/bor4.i [2022-12-14 11:34:45,127 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:34:45,284 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:34:45,285 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/sv-benchmarks/c/array-crafted/bor4.i [2022-12-14 11:34:45,290 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/data/22fb2daab/3dac740888364614a94aca835518fca6/FLAGe28a83943 [2022-12-14 11:34:45,698 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/data/22fb2daab/3dac740888364614a94aca835518fca6 [2022-12-14 11:34:45,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:34:45,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:34:45,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:34:45,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:34:45,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:34:45,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:34:45" (1/1) ... [2022-12-14 11:34:45,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dab0070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45, skipping insertion in model container [2022-12-14 11:34:45,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:34:45" (1/1) ... [2022-12-14 11:34:45,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:34:45,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:34:45,867 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_e0c89a32-6925-4f15-bda3-90f3c5f22f71/sv-benchmarks/c/array-crafted/bor4.i[1303,1316] [2022-12-14 11:34:45,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:34:45,878 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:34:45,894 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_e0c89a32-6925-4f15-bda3-90f3c5f22f71/sv-benchmarks/c/array-crafted/bor4.i[1303,1316] [2022-12-14 11:34:45,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:34:45,906 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:34:45,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45 WrapperNode [2022-12-14 11:34:45,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:34:45,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:34:45,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:34:45,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:34:45,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45" (1/1) ... [2022-12-14 11:34:45,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45" (1/1) ... [2022-12-14 11:34:45,934 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2022-12-14 11:34:45,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:34:45,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:34:45,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:34:45,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:34:45,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45" (1/1) ... [2022-12-14 11:34:45,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45" (1/1) ... [2022-12-14 11:34:45,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45" (1/1) ... [2022-12-14 11:34:45,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45" (1/1) ... [2022-12-14 11:34:45,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45" (1/1) ... [2022-12-14 11:34:45,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45" (1/1) ... [2022-12-14 11:34:45,954 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45" (1/1) ... [2022-12-14 11:34:45,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45" (1/1) ... [2022-12-14 11:34:45,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:34:45,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:34:45,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:34:45,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:34:45,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45" (1/1) ... [2022-12-14 11:34:45,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:34:45,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:45,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:34:45,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:34:46,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:34:46,017 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-12-14 11:34:46,017 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-12-14 11:34:46,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:34:46,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:34:46,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 11:34:46,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:34:46,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:34:46,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 11:34:46,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:34:46,076 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:34:46,077 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:34:46,209 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:34:46,269 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:34:46,269 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 11:34:46,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:34:46 BoogieIcfgContainer [2022-12-14 11:34:46,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:34:46,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:34:46,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:34:46,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:34:46,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:34:45" (1/3) ... [2022-12-14 11:34:46,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a7a1f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:34:46, skipping insertion in model container [2022-12-14 11:34:46,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:34:45" (2/3) ... [2022-12-14 11:34:46,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a7a1f86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:34:46, skipping insertion in model container [2022-12-14 11:34:46,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:34:46" (3/3) ... [2022-12-14 11:34:46,277 INFO L112 eAbstractionObserver]: Analyzing ICFG bor4.i [2022-12-14 11:34:46,292 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:34:46,292 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:34:46,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:34:46,335 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;@cad8140, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:34:46,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:34:46,339 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) [2022-12-14 11:34:46,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 11:34:46,345 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:46,345 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:46,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash -308016243, now seen corresponding path program 1 times [2022-12-14 11:34:46,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:46,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571749785] [2022-12-14 11:34:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:46,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 11:34:46,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:46,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571749785] [2022-12-14 11:34:46,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571749785] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:46,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:34:46,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:34:46,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104555368] [2022-12-14 11:34:46,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:46,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:34:46,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:46,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:34:46,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:34:46,592 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) [2022-12-14 11:34:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:46,631 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-12-14 11:34:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:34:46,633 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 [2022-12-14 11:34:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:46,638 INFO L225 Difference]: With dead ends: 33 [2022-12-14 11:34:46,638 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 11:34:46,641 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 [2022-12-14 11:34:46,643 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:46,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:34:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 11:34:46,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 11:34:46,669 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) [2022-12-14 11:34:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-12-14 11:34:46,671 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-12-14 11:34:46,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:46,671 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-12-14 11:34:46,671 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) [2022-12-14 11:34:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-12-14 11:34:46,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 11:34:46,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:46,673 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:46,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:34:46,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:46,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:46,674 INFO L85 PathProgramCache]: Analyzing trace with hash -545992349, now seen corresponding path program 1 times [2022-12-14 11:34:46,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:46,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308748278] [2022-12-14 11:34:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:46,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 11:34:46,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:46,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308748278] [2022-12-14 11:34:46,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308748278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:46,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734956384] [2022-12-14 11:34:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:46,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:46,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:46,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:46,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:34:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:46,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:34:46,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:34:46,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:46,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734956384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:46,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:34:46,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 11:34:46,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104048989] [2022-12-14 11:34:46,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:46,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:34:46,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:46,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:34:46,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:34:46,876 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) [2022-12-14 11:34:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:46,897 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-12-14 11:34:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:34:46,898 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 [2022-12-14 11:34:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:46,899 INFO L225 Difference]: With dead ends: 29 [2022-12-14 11:34:46,899 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 11:34:46,899 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 [2022-12-14 11:34:46,901 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 [2022-12-14 11:34:46,901 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] [2022-12-14 11:34:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 11:34:46,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 11:34:46,905 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) [2022-12-14 11:34:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-12-14 11:34:46,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-12-14 11:34:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:46,906 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-14 11:34:46,907 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) [2022-12-14 11:34:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-12-14 11:34:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:34:46,908 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:46,908 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:46,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:34:47,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:47,110 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:47,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1178293804, now seen corresponding path program 1 times [2022-12-14 11:34:47,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:47,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575287568] [2022-12-14 11:34:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:47,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 11:34:47,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:47,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575287568] [2022-12-14 11:34:47,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575287568] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:47,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116587262] [2022-12-14 11:34:47,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:47,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:47,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:47,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:47,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:34:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:47,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:34:47,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:34:47,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:34:47,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116587262] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:34:47,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:34:47,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 11:34:47,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647533293] [2022-12-14 11:34:47,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:34:47,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:34:47,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:47,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:34:47,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:34:47,384 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) [2022-12-14 11:34:47,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:47,402 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-12-14 11:34:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:34:47,403 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 [2022-12-14 11:34:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:47,403 INFO L225 Difference]: With dead ends: 27 [2022-12-14 11:34:47,403 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 11:34:47,404 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 [2022-12-14 11:34:47,405 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 [2022-12-14 11:34:47,405 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] [2022-12-14 11:34:47,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 11:34:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 11:34:47,409 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) [2022-12-14 11:34:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-12-14 11:34:47,410 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-12-14 11:34:47,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:47,412 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-12-14 11:34:47,412 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) [2022-12-14 11:34:47,412 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-12-14 11:34:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 11:34:47,413 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:47,413 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:47,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:34:47,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:47,614 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:47,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash 733965212, now seen corresponding path program 1 times [2022-12-14 11:34:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:47,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282202124] [2022-12-14 11:34:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:47,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 11:34:47,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:47,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282202124] [2022-12-14 11:34:47,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282202124] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:47,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179436709] [2022-12-14 11:34:47,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:47,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:47,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:47,729 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:47,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:34:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:47,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:34:47,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 11:34:47,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 11:34:47,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179436709] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:47,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1071840158] [2022-12-14 11:34:47,865 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:34:47,865 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:34:47,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:34:47,873 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:34:47,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:34:47,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:47,964 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:34:47,964 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 [2022-12-14 11:34:47,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:47,991 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:34:47,991 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 [2022-12-14 11:34:48,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:48,038 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 [2022-12-14 11:34:48,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:48,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:48,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:48,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:48,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:48,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:34:48,161 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 11:34:48,162 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 [2022-12-14 11:34:48,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 11:34:48,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:48,404 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 [2022-12-14 11:34:48,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:48,488 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 [2022-12-14 11:34:48,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:48,529 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-12-14 11:34:48,530 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 [2022-12-14 11:34:48,586 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 [2022-12-14 11:34:48,598 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 [2022-12-14 11:34:48,726 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-12-14 11:34:48,802 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:34:53,536 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|) (= |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_bor_~res~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_5 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_5 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_5 4294967296) (- 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 [2022-12-14 11:34:53,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:34:53,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:34:53,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-12-14 11:34:53,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819089023] [2022-12-14 11:34:53,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:34:53,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:34:53,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:34:53,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:34:53,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:34:53,538 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) [2022-12-14 11:34:53,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:53,562 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-12-14 11:34:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:34:53,562 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 [2022-12-14 11:34:53,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:53,563 INFO L225 Difference]: With dead ends: 36 [2022-12-14 11:34:53,563 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 11:34:53,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:34:53,564 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 [2022-12-14 11:34:53,564 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] [2022-12-14 11:34:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 11:34:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 11:34:53,567 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) [2022-12-14 11:34:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-12-14 11:34:53,568 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-12-14 11:34:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:53,568 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-12-14 11:34:53,569 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) [2022-12-14 11:34:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-12-14 11:34:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 11:34:53,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:53,569 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:53,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:34:53,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:53,770 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:34:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1348434362, now seen corresponding path program 2 times [2022-12-14 11:34:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:34:53,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848328831] [2022-12-14 11:34:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:34:53,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:34:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:34:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 11:34:53,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:34:53,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848328831] [2022-12-14 11:34:53,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848328831] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:34:53,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266951153] [2022-12-14 11:34:53,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:34:53,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:53,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:53,838 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:53,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:34:53,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 11:34:53,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:34:53,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:34:53,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 11:34:53,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 11:34:53,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266951153] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:53,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [871212940] [2022-12-14 11:34:53,927 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:34:53,927 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:34:53,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:34:53,927 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:34:53,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:34:53,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:53,958 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:34:53,958 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 [2022-12-14 11:34:53,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:53,968 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 [2022-12-14 11:34:53,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:53,994 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 [2022-12-14 11:34:54,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:54,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:54,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:54,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:54,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:54,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:54,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:54,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:54,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:54,075 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-12-14 11:34:54,076 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 [2022-12-14 11:34:54,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 11:34:54,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:54,184 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 [2022-12-14 11:34:54,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:54,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:34:54,262 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 [2022-12-14 11:34:54,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:34:54,293 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 11:34:54,293 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 [2022-12-14 11:34:54,322 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 [2022-12-14 11:34:54,336 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 [2022-12-14 11:34:54,420 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-12-14 11:34:54,479 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:35:01,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(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 [2022-12-14 11:35:01,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:35:01,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:35:01,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 11:35:01,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105252658] [2022-12-14 11:35:01,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:35:01,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:35:01,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:35:01,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:35:01,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-12-14 11:35:01,200 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) [2022-12-14 11:35:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:01,223 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-12-14 11:35:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:35:01,224 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 [2022-12-14 11:35:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:01,224 INFO L225 Difference]: With dead ends: 38 [2022-12-14 11:35:01,224 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 11:35:01,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2022-12-14 11:35:01,226 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 [2022-12-14 11:35:01,226 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] [2022-12-14 11:35:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 11:35:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-14 11:35:01,229 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) [2022-12-14 11:35:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 11:35:01,229 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-12-14 11:35:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:01,229 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 11:35:01,229 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) [2022-12-14 11:35:01,230 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 11:35:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 11:35:01,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:01,230 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:01,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 11:35:01,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:01,432 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:35:01,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:01,433 INFO L85 PathProgramCache]: Analyzing trace with hash -739907839, now seen corresponding path program 3 times [2022-12-14 11:35:01,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:35:01,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76672002] [2022-12-14 11:35:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:01,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:35:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 11:35:01,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:35:01,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76672002] [2022-12-14 11:35:01,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76672002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:35:01,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497372984] [2022-12-14 11:35:01,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:35:01,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:01,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:35:01,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:35:01,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:35:01,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:35:01,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:01,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:35:01,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-12-14 11:35:01,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-12-14 11:35:01,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497372984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:01,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1693946014] [2022-12-14 11:35:01,691 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:35:01,691 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:35:01,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:35:01,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:35:01,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:35:01,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:01,718 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:35:01,719 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 [2022-12-14 11:35:01,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:01,728 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 [2022-12-14 11:35:01,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:01,748 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 [2022-12-14 11:35:01,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:01,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:01,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:01,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:01,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:01,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:35:01,842 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 11:35:01,842 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 [2022-12-14 11:35:01,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 11:35:01,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:01,984 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 [2022-12-14 11:35:02,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:02,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:35:02,048 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 [2022-12-14 11:35:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:02,076 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 11:35:02,076 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 [2022-12-14 11:35:02,106 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 [2022-12-14 11:35:02,116 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 [2022-12-14 11:35:02,187 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-12-14 11:35:02,240 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:35:06,893 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)) (exists ((v_bor_~res~0_BEFORE_RETURN_18 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_18 4294967296) (- 4294967296))))) (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 [2022-12-14 11:35:06,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:35:06,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:35:06,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2022-12-14 11:35:06,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546817833] [2022-12-14 11:35:06,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:35:06,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 11:35:06,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:35:06,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 11:35:06,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-12-14 11:35:06,896 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) [2022-12-14 11:35:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:06,926 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-12-14 11:35:06,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 11:35:06,927 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 [2022-12-14 11:35:06,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:06,928 INFO L225 Difference]: With dead ends: 49 [2022-12-14 11:35:06,928 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 11:35:06,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-12-14 11:35:06,928 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 [2022-12-14 11:35:06,929 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] [2022-12-14 11:35:06,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 11:35:06,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-14 11:35:06,932 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) [2022-12-14 11:35:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-12-14 11:35:06,932 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-12-14 11:35:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:06,933 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-12-14 11:35:06,933 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) [2022-12-14 11:35:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-12-14 11:35:06,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 11:35:06,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:06,933 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:06,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:35:07,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:07,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:35:07,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:07,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1575268237, now seen corresponding path program 4 times [2022-12-14 11:35:07,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:35:07,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494462001] [2022-12-14 11:35:07,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:07,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:35:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 11:35:07,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:35:07,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494462001] [2022-12-14 11:35:07,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494462001] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:35:07,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521878936] [2022-12-14 11:35:07,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:35:07,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:07,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:35:07,403 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:35:07,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:35:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:07,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:35:07,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 11:35:07,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 11:35:07,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521878936] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:07,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [310551376] [2022-12-14 11:35:07,645 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:35:07,645 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:35:07,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:35:07,645 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:35:07,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:35:07,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,671 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:35:07,671 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 [2022-12-14 11:35:07,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,694 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:35:07,694 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 [2022-12-14 11:35:07,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,715 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 [2022-12-14 11:35:07,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,794 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-12-14 11:35:07,794 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 [2022-12-14 11:35:07,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 11:35:07,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,891 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 [2022-12-14 11:35:07,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:35:07,951 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 [2022-12-14 11:35:07,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:07,975 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 11:35:07,975 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 [2022-12-14 11:35:07,993 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 [2022-12-14 11:35:08,005 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 [2022-12-14 11:35:08,077 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-12-14 11:35:08,129 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:35:12,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1574#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_24 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_24 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_24 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)) (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|))) (= |#NULL.base| 0))' at error location [2022-12-14 11:35:12,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:35:12,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:35:12,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2022-12-14 11:35:12,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324643624] [2022-12-14 11:35:12,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:35:12,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 11:35:12,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:35:12,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 11:35:12,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 11:35:12,842 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) [2022-12-14 11:35:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:12,879 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-12-14 11:35:12,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:35:12,879 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 [2022-12-14 11:35:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:12,879 INFO L225 Difference]: With dead ends: 62 [2022-12-14 11:35:12,880 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 11:35:12,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 11:35:12,880 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 [2022-12-14 11:35:12,881 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] [2022-12-14 11:35:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 11:35:12,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-14 11:35:12,884 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) [2022-12-14 11:35:12,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-12-14 11:35:12,884 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 44 [2022-12-14 11:35:12,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:12,884 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-12-14 11:35:12,884 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) [2022-12-14 11:35:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-12-14 11:35:12,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 11:35:12,885 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:12,885 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:12,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:35:13,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:13,087 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:35:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2048376819, now seen corresponding path program 5 times [2022-12-14 11:35:13,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:35:13,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480183730] [2022-12-14 11:35:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:13,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:35:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 11:35:13,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:35:13,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480183730] [2022-12-14 11:35:13,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480183730] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:35:13,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689490366] [2022-12-14 11:35:13,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:35:13,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:13,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:35:13,618 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:35:13,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:35:13,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 11:35:13,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:13,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:35:13,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-12-14 11:35:13,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-12-14 11:35:13,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689490366] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:13,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1631849552] [2022-12-14 11:35:13,791 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:35:13,791 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:35:13,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:35:13,791 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:35:13,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:35:13,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:13,811 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:35:13,811 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 [2022-12-14 11:35:13,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:13,819 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 [2022-12-14 11:35:13,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:13,833 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 [2022-12-14 11:35:13,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:13,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:13,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:13,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:13,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:13,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:13,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:13,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:13,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:13,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:13,909 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-12-14 11:35:13,910 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 [2022-12-14 11:35:13,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 11:35:14,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:14,014 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 [2022-12-14 11:35:14,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:14,088 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 [2022-12-14 11:35:14,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:14,129 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-12-14 11:35:14,130 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 [2022-12-14 11:35:14,160 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 [2022-12-14 11:35:14,170 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 [2022-12-14 11:35:14,243 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-12-14 11:35:14,301 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:35:15,198 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_bor_~res~0_BEFORE_RETURN_30 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_30 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_30 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_30 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 [2022-12-14 11:35:15,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:35:15,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:35:15,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2022-12-14 11:35:15,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893135883] [2022-12-14 11:35:15,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:35:15,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 11:35:15,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:35:15,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 11:35:15,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 11:35:15,201 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) [2022-12-14 11:35:15,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:15,251 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-12-14 11:35:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 11:35:15,252 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 [2022-12-14 11:35:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:15,252 INFO L225 Difference]: With dead ends: 69 [2022-12-14 11:35:15,252 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 11:35:15,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 11:35:15,253 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:35:15,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:35:15,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 11:35:15,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-14 11:35:15,256 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) [2022-12-14 11:35:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-12-14 11:35:15,257 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 56 [2022-12-14 11:35:15,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:15,257 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-12-14 11:35:15,257 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) [2022-12-14 11:35:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-12-14 11:35:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 11:35:15,258 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:15,258 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:15,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:35:15,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:15,460 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:35:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:15,461 INFO L85 PathProgramCache]: Analyzing trace with hash -596580093, now seen corresponding path program 6 times [2022-12-14 11:35:15,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:35:15,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327095320] [2022-12-14 11:35:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:15,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:35:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 11:35:16,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:35:16,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327095320] [2022-12-14 11:35:16,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327095320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:35:16,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616063756] [2022-12-14 11:35:16,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:35:16,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:16,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:35:16,177 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:35:16,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:35:16,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:35:16,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:16,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 11:35:16,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 11:35:16,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 11:35:16,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616063756] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:16,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1842347002] [2022-12-14 11:35:16,929 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:35:16,929 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:35:16,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:35:16,929 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:35:16,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:35:16,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:16,948 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:35:16,949 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 [2022-12-14 11:35:16,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:16,956 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 [2022-12-14 11:35:16,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:16,977 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 [2022-12-14 11:35:17,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:17,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:17,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:17,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:17,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:17,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:17,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:17,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:17,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:17,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:17,041 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-12-14 11:35:17,041 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 [2022-12-14 11:35:17,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 11:35:17,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:17,134 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 [2022-12-14 11:35:17,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:17,186 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 [2022-12-14 11:35:17,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:17,226 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 11:35:17,226 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 [2022-12-14 11:35:17,257 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 [2022-12-14 11:35:17,266 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 [2022-12-14 11:35:17,340 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-12-14 11:35:17,379 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:35:20,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2862#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_35 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_35 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_35 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_35 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 [2022-12-14 11:35:20,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:35:20,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:35:20,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2022-12-14 11:35:20,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611062170] [2022-12-14 11:35:20,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:35:20,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 11:35:20,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:35:20,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 11:35:20,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 11:35:20,292 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) [2022-12-14 11:35:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:20,351 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2022-12-14 11:35:20,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 11:35:20,351 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 [2022-12-14 11:35:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:20,352 INFO L225 Difference]: With dead ends: 100 [2022-12-14 11:35:20,352 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 11:35:20,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1335, Invalid=2697, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 11:35:20,354 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:35:20,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:35:20,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 11:35:20,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-12-14 11:35:20,361 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) [2022-12-14 11:35:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-12-14 11:35:20,362 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 75 [2022-12-14 11:35:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:20,363 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-12-14 11:35:20,363 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) [2022-12-14 11:35:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-12-14 11:35:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 11:35:20,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:20,364 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:20,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:35:20,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:20,566 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:35:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:20,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1061278867, now seen corresponding path program 7 times [2022-12-14 11:35:20,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:35:20,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848014626] [2022-12-14 11:35:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:20,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:35:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 11:35:22,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:35:22,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848014626] [2022-12-14 11:35:22,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848014626] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:35:22,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437872712] [2022-12-14 11:35:22,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:35:22,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:22,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:35:22,147 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:35:22,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:35:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:22,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 11:35:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 11:35:22,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 11:35:24,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437872712] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:24,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1837100436] [2022-12-14 11:35:24,339 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:35:24,340 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:35:24,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:35:24,340 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:35:24,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:35:24,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:24,358 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:35:24,358 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 [2022-12-14 11:35:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:24,369 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 [2022-12-14 11:35:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:24,388 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 [2022-12-14 11:35:24,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:24,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:24,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:24,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:24,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:24,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:35:24,464 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 11:35:24,465 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 [2022-12-14 11:35:24,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 11:35:24,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:24,595 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 [2022-12-14 11:35:24,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:24,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:35:24,648 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 [2022-12-14 11:35:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:24,674 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 11:35:24,675 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 [2022-12-14 11:35:24,691 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 [2022-12-14 11:35:24,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 11:35:24,759 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-12-14 11:35:24,812 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:35:29,894 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3897#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_bor_~res~0_BEFORE_RETURN_42 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_42 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_42 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_42 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 [2022-12-14 11:35:29,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:35:29,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:35:29,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2022-12-14 11:35:29,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460484745] [2022-12-14 11:35:29,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:35:29,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-14 11:35:29,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:35:29,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-14 11:35:29,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 11:35:29,903 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) [2022-12-14 11:35:30,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:30,035 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2022-12-14 11:35:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 11:35:30,035 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 [2022-12-14 11:35:30,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:30,036 INFO L225 Difference]: With dead ends: 150 [2022-12-14 11:35:30,036 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 11:35:30,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2138 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5110, Invalid=7772, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 11:35:30,038 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 [2022-12-14 11:35:30,039 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] [2022-12-14 11:35:30,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 11:35:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-12-14 11:35:30,044 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) [2022-12-14 11:35:30,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-12-14 11:35:30,045 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 100 [2022-12-14 11:35:30,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:30,045 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-12-14 11:35:30,045 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) [2022-12-14 11:35:30,045 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-12-14 11:35:30,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 11:35:30,046 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:30,046 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:30,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 11:35:30,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 11:35:30,248 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:35:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:30,249 INFO L85 PathProgramCache]: Analyzing trace with hash -724654035, now seen corresponding path program 8 times [2022-12-14 11:35:30,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:35:30,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59649249] [2022-12-14 11:35:30,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:30,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:35:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2022-12-14 11:35:35,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:35:35,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59649249] [2022-12-14 11:35:35,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59649249] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:35:35,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692656618] [2022-12-14 11:35:35,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:35:35,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:35,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:35:35,019 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:35:35,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:35:35,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 11:35:35,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:35,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:35:35,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2022-12-14 11:35:35,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2022-12-14 11:35:35,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692656618] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:35,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1200204620] [2022-12-14 11:35:35,387 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:35:35,387 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:35:35,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:35:35,388 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:35:35,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:35:35,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,411 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:35:35,411 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 [2022-12-14 11:35:35,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,419 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 [2022-12-14 11:35:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,432 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 [2022-12-14 11:35:35,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,502 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-12-14 11:35:35,502 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 [2022-12-14 11:35:35,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 11:35:35,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,583 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 [2022-12-14 11:35:35,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:35:35,631 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 [2022-12-14 11:35:35,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:35,657 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 11:35:35,657 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 [2022-12-14 11:35:35,674 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 [2022-12-14 11:35:35,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 11:35:35,746 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-12-14 11:35:35,786 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:35:39,410 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|) (exists ((v_bor_~res~0_BEFORE_RETURN_48 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_48 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_48 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_48 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 [2022-12-14 11:35:39,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:35:39,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:35:39,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2022-12-14 11:35:39,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729973031] [2022-12-14 11:35:39,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:35:39,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-12-14 11:35:39,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:35:39,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-12-14 11:35:39,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2022-12-14 11:35:39,417 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) [2022-12-14 11:35:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:39,541 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2022-12-14 11:35:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-12-14 11:35:39,542 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 [2022-12-14 11:35:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:39,543 INFO L225 Difference]: With dead ends: 155 [2022-12-14 11:35:39,543 INFO L226 Difference]: Without dead ends: 130 [2022-12-14 11:35:39,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=5137, Invalid=9143, Unknown=0, NotChecked=0, Total=14280 [2022-12-14 11:35:39,547 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 [2022-12-14 11:35:39,547 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] [2022-12-14 11:35:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-14 11:35:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-12-14 11:35:39,553 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) [2022-12-14 11:35:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-12-14 11:35:39,553 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 150 [2022-12-14 11:35:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:39,554 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-12-14 11:35:39,554 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) [2022-12-14 11:35:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-12-14 11:35:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 11:35:39,555 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:39,555 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:39,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 11:35:39,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:39,757 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:35:39,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:39,758 INFO L85 PathProgramCache]: Analyzing trace with hash -905231741, now seen corresponding path program 9 times [2022-12-14 11:35:39,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:35:39,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329306192] [2022-12-14 11:35:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:39,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:35:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-12-14 11:35:44,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:35:44,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329306192] [2022-12-14 11:35:44,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329306192] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:35:44,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127060883] [2022-12-14 11:35:44,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:35:44,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:44,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:35:44,597 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:35:44,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 11:35:44,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:35:44,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:44,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-14 11:35:44,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-12-14 11:35:44,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-12-14 11:35:53,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127060883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:53,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1643072933] [2022-12-14 11:35:53,243 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:35:53,243 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:35:53,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:35:53,243 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:35:53,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:35:53,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,266 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:35:53,266 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 [2022-12-14 11:35:53,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,275 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 [2022-12-14 11:35:53,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,292 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 [2022-12-14 11:35:53,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,372 INFO L321 Elim1Store]: treesize reduction 144, result has 13.3 percent of original size [2022-12-14 11:35:53,372 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 [2022-12-14 11:35:53,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 11:35:53,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,465 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 [2022-12-14 11:35:53,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:35:53,514 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 [2022-12-14 11:35:53,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:35:53,538 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 11:35:53,538 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 [2022-12-14 11:35:53,564 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 [2022-12-14 11:35:53,572 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 [2022-12-14 11:35:53,629 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-12-14 11:35:53,668 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:35:55,188 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|) (= |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_bor_~res~0_BEFORE_RETURN_54 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_54 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_54 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_54 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 [2022-12-14 11:35:55,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:35:55,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:35:55,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 102] total 203 [2022-12-14 11:35:55,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766238576] [2022-12-14 11:35:55,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:35:55,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-12-14 11:35:55,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:35:55,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-12-14 11:35:55,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20563, Invalid=25877, Unknown=0, NotChecked=0, Total=46440 [2022-12-14 11:35:55,195 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) [2022-12-14 11:35:55,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:55,582 INFO L93 Difference]: Finished difference Result 260 states and 368 transitions. [2022-12-14 11:35:55,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-12-14 11:35:55,583 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 [2022-12-14 11:35:55,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:55,584 INFO L225 Difference]: With dead ends: 260 [2022-12-14 11:35:55,584 INFO L226 Difference]: Without dead ends: 231 [2022-12-14 11:35:55,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=20563, Invalid=25877, Unknown=0, NotChecked=0, Total=46440 [2022-12-14 11:35:55,588 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, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:35:55,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:35:55,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-12-14 11:35:55,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-12-14 11:35:55,601 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) [2022-12-14 11:35:55,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2022-12-14 11:35:55,602 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 155 [2022-12-14 11:35:55,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:55,602 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2022-12-14 11:35:55,603 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) [2022-12-14 11:35:55,603 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2022-12-14 11:35:55,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-12-14 11:35:55,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:55,606 INFO L195 NwaCegarLoop]: trace histogram [200, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:55,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 11:35:55,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:55,808 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:35:55,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:55,809 INFO L85 PathProgramCache]: Analyzing trace with hash -105674387, now seen corresponding path program 10 times [2022-12-14 11:35:55,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:35:55,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559424162] [2022-12-14 11:35:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:55,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:35:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-12-14 11:36:13,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:36:13,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559424162] [2022-12-14 11:36:13,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559424162] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:36:13,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694847353] [2022-12-14 11:36:13,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:36:13,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:13,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:36:13,176 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:36:13,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:36:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:36:13,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 2100 conjuncts, 202 conjunts are in the unsatisfiable core [2022-12-14 11:36:13,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-12-14 11:36:13,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:36:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20655 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-12-14 11:36:47,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694847353] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:36:47,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [634104165] [2022-12-14 11:36:47,155 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:36:47,155 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:36:47,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:36:47,155 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:36:47,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:36:47,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,173 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:36:47,173 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 [2022-12-14 11:36:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,188 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:36:47,189 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 [2022-12-14 11:36:47,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,207 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 [2022-12-14 11:36:47,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:47,273 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 11:36:47,274 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 [2022-12-14 11:36:47,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 11:36:47,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,383 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 [2022-12-14 11:36:47,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:36:47,428 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 [2022-12-14 11:36:47,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:36:47,451 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 11:36:47,451 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 [2022-12-14 11:36:47,470 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 [2022-12-14 11:36:47,478 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 [2022-12-14 11:36:47,555 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-12-14 11:36:47,608 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:36:53,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10032#(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_~ret2~0#1| 2147483648)) (exists ((v_bor_~res~0_BEFORE_RETURN_59 Int)) (= (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_59 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_59 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_59 4294967296) (- 4294967296))) |ULTIMATE.start_main_~ret5~0#1|)) (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|))) (= |#NULL.base| 0))' at error location [2022-12-14 11:36:53,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:36:53,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:36:53,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 202, 203] total 405 [2022-12-14 11:36:53,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653674316] [2022-12-14 11:36:53,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:36:53,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-12-14 11:36:53,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:36:53,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-12-14 11:36:53,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81870, Invalid=92436, Unknown=0, NotChecked=0, Total=174306 [2022-12-14 11:36:53,982 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) [2022-12-14 11:36:55,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:55,636 INFO L93 Difference]: Finished difference Result 462 states and 671 transitions. [2022-12-14 11:36:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-12-14 11:36:55,637 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 [2022-12-14 11:36:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:55,640 INFO L225 Difference]: With dead ends: 462 [2022-12-14 11:36:55,640 INFO L226 Difference]: Without dead ends: 433 [2022-12-14 11:36:55,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 969 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8674 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=81870, Invalid=92436, Unknown=0, NotChecked=0, Total=174306 [2022-12-14 11:36:55,647 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 [2022-12-14 11:36:55,648 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] [2022-12-14 11:36:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-12-14 11:36:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2022-12-14 11:36:55,661 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) [2022-12-14 11:36:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 437 transitions. [2022-12-14 11:36:55,662 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 437 transitions. Word has length 256 [2022-12-14 11:36:55,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:55,663 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 437 transitions. [2022-12-14 11:36:55,664 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) [2022-12-14 11:36:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 437 transitions. [2022-12-14 11:36:55,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2022-12-14 11:36:55,669 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:55,669 INFO L195 NwaCegarLoop]: trace histogram [402, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:55,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 11:36:55,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 11:36:55,871 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:36:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:55,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1491618003, now seen corresponding path program 11 times [2022-12-14 11:36:55,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:36:55,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329138756] [2022-12-14 11:36:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:36:55,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:36:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:38:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-12-14 11:38:13,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:38:13,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329138756] [2022-12-14 11:38:13,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329138756] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:38:13,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557071749] [2022-12-14 11:38:13,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:38:13,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:38:13,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:38:13,281 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:38:13,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 11:38:13,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 11:38:13,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:38:13,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:38:13,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:38:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 246 proven. 21 refuted. 0 times theorem prover too weak. 81291 trivial. 0 not checked. [2022-12-14 11:38:14,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:38:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 81558 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 81537 trivial. 0 not checked. [2022-12-14 11:38:15,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557071749] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:38:15,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [321247448] [2022-12-14 11:38:15,672 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:38:15,672 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:38:15,672 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:38:15,672 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:38:15,672 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:38:15,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:15,690 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:38:15,691 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 [2022-12-14 11:38:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:15,709 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:38:15,709 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 [2022-12-14 11:38:15,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:15,722 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 [2022-12-14 11:38:15,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:15,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:15,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:15,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:15,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:15,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:38:15,792 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 11:38:15,792 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 [2022-12-14 11:38:15,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 11:38:15,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:15,894 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 [2022-12-14 11:38:15,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:15,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:38:15,945 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 [2022-12-14 11:38:15,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:38:15,972 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 11:38:15,972 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 [2022-12-14 11:38:15,988 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 [2022-12-14 11:38:15,999 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 [2022-12-14 11:38:16,059 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-12-14 11:38:16,126 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:38:26,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14973#(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 [2022-12-14 11:38:26,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:38:26,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:38:26,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 9, 9] total 419 [2022-12-14 11:38:26,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777442890] [2022-12-14 11:38:26,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:38:26,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 419 states [2022-12-14 11:38:26,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:38:26,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 419 interpolants. [2022-12-14 11:38:26,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81988, Invalid=104203, Unknown=1, NotChecked=0, Total=186192 [2022-12-14 11:38:26,595 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) [2022-12-14 11:38:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:38:28,565 INFO L93 Difference]: Finished difference Result 471 states and 487 transitions. [2022-12-14 11:38:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 419 states. [2022-12-14 11:38:28,566 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 [2022-12-14 11:38:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:38:28,568 INFO L225 Difference]: With dead ends: 471 [2022-12-14 11:38:28,568 INFO L226 Difference]: Without dead ends: 442 [2022-12-14 11:38:28,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1777 GetRequests, 1347 SyntacticMatches, 0 SemanticMatches, 430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11136 ImplicationChecksByTransitivity, 55.3s TimeCoverageRelationStatistics Valid=81988, Invalid=104203, Unknown=1, NotChecked=0, Total=186192 [2022-12-14 11:38:28,579 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:38:28,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:38:28,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-12-14 11:38:28,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-12-14 11:38:28,591 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) [2022-12-14 11:38:28,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 446 transitions. [2022-12-14 11:38:28,592 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 446 transitions. Word has length 458 [2022-12-14 11:38:28,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:38:28,592 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 446 transitions. [2022-12-14 11:38:28,593 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) [2022-12-14 11:38:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 446 transitions. [2022-12-14 11:38:28,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-12-14 11:38:28,597 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:38:28,597 INFO L195 NwaCegarLoop]: trace histogram [403, 30, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:38:28,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 11:38:28,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 11:38:28,798 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:38:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:38:28,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1184466051, now seen corresponding path program 12 times [2022-12-14 11:38:28,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:38:28,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783585018] [2022-12-14 11:38:28,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:38:28,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:38:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2022-12-14 11:39:46,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:39:46,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783585018] [2022-12-14 11:39:46,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783585018] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:39:46,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742358328] [2022-12-14 11:39:46,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:39:46,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:39:46,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:39:46,253 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:39:46,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 11:39:46,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:39:46,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:39:46,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 3983 conjuncts, 405 conjunts are in the unsatisfiable core [2022-12-14 11:39:46,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2022-12-14 11:39:47,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 82045 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 639 trivial. 0 not checked. [2022-12-14 11:41:54,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742358328] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:54,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091736571] [2022-12-14 11:41:54,979 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:41:54,979 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:41:54,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:41:54,980 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:41:54,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:41:54,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:54,997 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:41:54,997 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 [2022-12-14 11:41:55,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:55,003 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 [2022-12-14 11:41:55,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:55,016 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 [2022-12-14 11:41:55,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:55,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:55,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:55,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:55,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:55,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:41:55,085 INFO L321 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-12-14 11:41:55,085 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 [2022-12-14 11:41:55,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 11:41:55,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:55,188 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 [2022-12-14 11:41:55,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:55,236 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 [2022-12-14 11:41:55,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:41:55,268 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 11:41:55,268 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 [2022-12-14 11:41:55,297 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 [2022-12-14 11:41:55,304 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 [2022-12-14 11:41:55,361 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 12 for LOIs [2022-12-14 11:41:55,399 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:42:01,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20396#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 99999 |ULTIMATE.start_main_~i~2#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((v_bor_~res~0_BEFORE_RETURN_72 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) 2147483647) (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) (+ (mod v_bor_~res~0_BEFORE_RETURN_72 4294967296) (- 4294967296))))) (<= 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 [2022-12-14 11:42:01,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:42:01,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:42:01,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [406, 405, 406] total 811 [2022-12-14 11:42:01,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237985489] [2022-12-14 11:42:01,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:42:01,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-12-14 11:42:01,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:42:02,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-12-14 11:42:02,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328515, Invalid=349637, Unknown=0, NotChecked=0, Total=678152 [2022-12-14 11:42:02,068 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) [2022-12-14 11:42:15,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:42:15,469 INFO L93 Difference]: Finished difference Result 884 states and 1296 transitions. [2022-12-14 11:42:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-12-14 11:42:15,470 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 [2022-12-14 11:42:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:42:15,472 INFO L225 Difference]: With dead ends: 884 [2022-12-14 11:42:15,472 INFO L226 Difference]: Without dead ends: 847 [2022-12-14 11:42:15,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1805 GetRequests, 983 SyntacticMatches, 0 SemanticMatches, 822 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17403 ImplicationChecksByTransitivity, 174.8s TimeCoverageRelationStatistics Valid=328515, Invalid=349637, Unknown=0, NotChecked=0, Total=678152 [2022-12-14 11:42:15,506 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:42:15,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 11:42:15,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-12-14 11:42:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 847. [2022-12-14 11:42:15,525 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) [2022-12-14 11:42:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 851 transitions. [2022-12-14 11:42:15,526 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 851 transitions. Word has length 467 [2022-12-14 11:42:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:42:15,527 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 851 transitions. [2022-12-14 11:42:15,527 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) [2022-12-14 11:42:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 851 transitions. [2022-12-14 11:42:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2022-12-14 11:42:15,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:42:15,533 INFO L195 NwaCegarLoop]: trace histogram [808, 30, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:42:15,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 11:42:15,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0c89a32-6925-4f15-bda3-90f3c5f22f71/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 11:42:15,735 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:42:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:42:15,736 INFO L85 PathProgramCache]: Analyzing trace with hash 846129005, now seen corresponding path program 13 times [2022-12-14 11:42:15,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:42:15,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107395967] [2022-12-14 11:42:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:42:15,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:42:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat