./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de62.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de62.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9 --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 de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --- 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-6b4ec56 [2022-11-20 21:17:22,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:17:22,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:17:22,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:17:22,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:17:22,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:17:22,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:17:22,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:17:22,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:17:22,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:17:22,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:17:22,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:17:22,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:17:22,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:17:22,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:17:22,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:17:22,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:17:22,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:17:22,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:17:22,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:17:22,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:17:22,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:17:22,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:17:22,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:17:22,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:17:22,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:17:22,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:17:22,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:17:22,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:17:22,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:17:22,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:17:22,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:17:22,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:17:22,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:17:22,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:17:22,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:17:22,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:17:22,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:17:22,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:17:22,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:17:22,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:17:22,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:17:22,483 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:17:22,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:17:22,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:17:22,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:17:22,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:17:22,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:17:22,486 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:17:22,486 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:17:22,486 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:17:22,486 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:17:22,488 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:17:22,488 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:17:22,488 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:17:22,488 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:17:22,489 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:17:22,489 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:17:22,489 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:17:22,489 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:17:22,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:17:22,490 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:17:22,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:17:22,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:17:22,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:17:22,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:17:22,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:17:22,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:17:22,492 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:17:22,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:17:22,493 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:17:22,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:17:22,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:17:22,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:17:22,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:17:22,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:17:22,495 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:17:22,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:17:22,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:17:22,495 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:17:22,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:17:22,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:17:22,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:17:22,496 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_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf [2022-11-20 21:17:22,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:17:22,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:17:22,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:17:22,801 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:17:22,801 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:17:22,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/loops-crafted-1/in-de62.c [2022-11-20 21:17:25,905 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:17:26,083 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:17:26,084 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/sv-benchmarks/c/loops-crafted-1/in-de62.c [2022-11-20 21:17:26,090 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/data/0b13234d5/8ec0b6cc15374f0e97a14d2fc36ab09b/FLAG35df163e7 [2022-11-20 21:17:26,105 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/data/0b13234d5/8ec0b6cc15374f0e97a14d2fc36ab09b [2022-11-20 21:17:26,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:17:26,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:17:26,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:17:26,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:17:26,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:17:26,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:17:26" (1/1) ... [2022-11-20 21:17:26,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb8644a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26, skipping insertion in model container [2022-11-20 21:17:26,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:17:26" (1/1) ... [2022-11-20 21:17:26,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:17:26,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:17:26,282 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_7f870e1f-c7d9-4246-beea-63c157019e9f/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2022-11-20 21:17:26,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:17:26,307 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:17:26,319 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_7f870e1f-c7d9-4246-beea-63c157019e9f/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2022-11-20 21:17:26,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:17:26,337 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:17:26,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26 WrapperNode [2022-11-20 21:17:26,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:17:26,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:17:26,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:17:26,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:17:26,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26" (1/1) ... [2022-11-20 21:17:26,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26" (1/1) ... [2022-11-20 21:17:26,372 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-11-20 21:17:26,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:17:26,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:17:26,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:17:26,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:17:26,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26" (1/1) ... [2022-11-20 21:17:26,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26" (1/1) ... [2022-11-20 21:17:26,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26" (1/1) ... [2022-11-20 21:17:26,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26" (1/1) ... [2022-11-20 21:17:26,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26" (1/1) ... [2022-11-20 21:17:26,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26" (1/1) ... [2022-11-20 21:17:26,393 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26" (1/1) ... [2022-11-20 21:17:26,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26" (1/1) ... [2022-11-20 21:17:26,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:17:26,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:17:26,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:17:26,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:17:26,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26" (1/1) ... [2022-11-20 21:17:26,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:17:26,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:26,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:17:26,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:17:26,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:17:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:17:26,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:17:26,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:17:26,567 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:17:26,569 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:17:26,733 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:17:26,767 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:17:26,768 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 21:17:26,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:17:26 BoogieIcfgContainer [2022-11-20 21:17:26,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:17:26,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:17:26,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:17:26,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:17:26,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:17:26" (1/3) ... [2022-11-20 21:17:26,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62cb7467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:17:26, skipping insertion in model container [2022-11-20 21:17:26,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:17:26" (2/3) ... [2022-11-20 21:17:26,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62cb7467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:17:26, skipping insertion in model container [2022-11-20 21:17:26,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:17:26" (3/3) ... [2022-11-20 21:17:26,781 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2022-11-20 21:17:26,801 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:17:26,801 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:17:26,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:17:26,857 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;@626592aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:17:26,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:17:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:17:26,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:26,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:26,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:26,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:26,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1494346701, now seen corresponding path program 1 times [2022-11-20 21:17:26,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:26,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812313281] [2022-11-20 21:17:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:26,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:27,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:27,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812313281] [2022-11-20 21:17:27,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812313281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:17:27,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:17:27,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:17:27,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133193690] [2022-11-20 21:17:27,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:17:27,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:17:27,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:27,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:17:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:17:27,264 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:27,425 INFO L93 Difference]: Finished difference Result 28 states and 42 transitions. [2022-11-20 21:17:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:17:27,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:17:27,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:27,436 INFO L225 Difference]: With dead ends: 28 [2022-11-20 21:17:27,436 INFO L226 Difference]: Without dead ends: 15 [2022-11-20 21:17:27,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:17:27,442 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:27,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 13 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:17:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-20 21:17:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-20 21:17:27,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2022-11-20 21:17:27,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 9 [2022-11-20 21:17:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:27,479 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2022-11-20 21:17:27,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2022-11-20 21:17:27,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:17:27,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:27,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:27,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:17:27,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:27,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash -920562327, now seen corresponding path program 1 times [2022-11-20 21:17:27,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:27,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718879868] [2022-11-20 21:17:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:27,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:27,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:27,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718879868] [2022-11-20 21:17:27,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718879868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:17:27,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:17:27,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:17:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253331492] [2022-11-20 21:17:27,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:17:27,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:17:27,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:27,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:17:27,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:17:27,540 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:27,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:27,650 INFO L93 Difference]: Finished difference Result 36 states and 58 transitions. [2022-11-20 21:17:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:17:27,651 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:17:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:27,652 INFO L225 Difference]: With dead ends: 36 [2022-11-20 21:17:27,652 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 21:17:27,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:17:27,654 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:27,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 8 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:17:27,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 21:17:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-20 21:17:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 37 transitions. [2022-11-20 21:17:27,674 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 37 transitions. Word has length 10 [2022-11-20 21:17:27,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:27,674 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 37 transitions. [2022-11-20 21:17:27,674 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 37 transitions. [2022-11-20 21:17:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:17:27,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:27,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:27,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:17:27,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:27,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:27,677 INFO L85 PathProgramCache]: Analyzing trace with hash -956639228, now seen corresponding path program 1 times [2022-11-20 21:17:27,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:27,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660038229] [2022-11-20 21:17:27,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:27,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:27,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:27,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660038229] [2022-11-20 21:17:27,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660038229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:17:27,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:17:27,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:17:27,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247974110] [2022-11-20 21:17:27,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:17:27,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:17:27,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:27,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:17:27,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:17:27,730 INFO L87 Difference]: Start difference. First operand 24 states and 37 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:27,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:27,806 INFO L93 Difference]: Finished difference Result 38 states and 58 transitions. [2022-11-20 21:17:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:17:27,807 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:17:27,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:27,808 INFO L225 Difference]: With dead ends: 38 [2022-11-20 21:17:27,808 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 21:17:27,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:17:27,810 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:27,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:17:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 21:17:27,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-20 21:17:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:27,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2022-11-20 21:17:27,826 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 42 transitions. Word has length 10 [2022-11-20 21:17:27,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:27,826 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 42 transitions. [2022-11-20 21:17:27,826 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 42 transitions. [2022-11-20 21:17:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:17:27,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:27,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:27,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:17:27,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:27,829 INFO L85 PathProgramCache]: Analyzing trace with hash 670220808, now seen corresponding path program 1 times [2022-11-20 21:17:27,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:27,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34368489] [2022-11-20 21:17:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:27,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:17:27,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:27,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34368489] [2022-11-20 21:17:27,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34368489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:27,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074231747] [2022-11-20 21:17:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:27,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:27,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:27,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:28,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:17:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:28,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:17:28,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:17:28,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:17:28,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074231747] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:28,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:17:28,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-11-20 21:17:28,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386117981] [2022-11-20 21:17:28,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:17:28,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:17:28,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:28,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:17:28,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:17:28,252 INFO L87 Difference]: Start difference. First operand 28 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:28,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:28,330 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2022-11-20 21:17:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:17:28,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:17:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:28,334 INFO L225 Difference]: With dead ends: 34 [2022-11-20 21:17:28,335 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 21:17:28,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:17:28,339 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:28,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:17:28,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 21:17:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-20 21:17:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 37 transitions. [2022-11-20 21:17:28,359 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 37 transitions. Word has length 12 [2022-11-20 21:17:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:28,360 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 37 transitions. [2022-11-20 21:17:28,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 37 transitions. [2022-11-20 21:17:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:17:28,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:28,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:28,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:28,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:28,568 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1334467175, now seen corresponding path program 1 times [2022-11-20 21:17:28,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:28,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25275146] [2022-11-20 21:17:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:28,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:17:28,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:28,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25275146] [2022-11-20 21:17:28,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25275146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:17:28,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:17:28,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:17:28,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963185083] [2022-11-20 21:17:28,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:17:28,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:17:28,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:28,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:17:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:17:28,715 INFO L87 Difference]: Start difference. First operand 25 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:28,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:28,779 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2022-11-20 21:17:28,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:17:28,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:17:28,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:28,781 INFO L225 Difference]: With dead ends: 33 [2022-11-20 21:17:28,781 INFO L226 Difference]: Without dead ends: 22 [2022-11-20 21:17:28,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:17:28,782 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:28,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 15 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:17:28,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-20 21:17:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-20 21:17:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2022-11-20 21:17:28,800 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 12 [2022-11-20 21:17:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:28,800 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2022-11-20 21:17:28,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2022-11-20 21:17:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:17:28,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:28,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:28,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 21:17:28,804 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:28,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1349248892, now seen corresponding path program 1 times [2022-11-20 21:17:28,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:28,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937031004] [2022-11-20 21:17:28,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:28,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:17:28,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:28,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937031004] [2022-11-20 21:17:28,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937031004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:28,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961158900] [2022-11-20 21:17:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:28,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:28,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:28,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:28,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:17:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:28,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:17:28,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:28,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:17:29,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961158900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1097061082] [2022-11-20 21:17:29,064 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:29,065 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:29,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:29,074 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:29,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:29,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:29,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '696#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:29,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:29,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:29,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2022-11-20 21:17:29,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598985596] [2022-11-20 21:17:29,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:29,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 21:17:29,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:29,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 21:17:29,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:17:29,529 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:29,831 INFO L93 Difference]: Finished difference Result 92 states and 143 transitions. [2022-11-20 21:17:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 21:17:29,832 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 21:17:29,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:29,834 INFO L225 Difference]: With dead ends: 92 [2022-11-20 21:17:29,834 INFO L226 Difference]: Without dead ends: 76 [2022-11-20 21:17:29,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-20 21:17:29,835 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 79 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:29,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 21 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:17:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-20 21:17:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 47. [2022-11-20 21:17:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 73 transitions. [2022-11-20 21:17:29,852 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 73 transitions. Word has length 13 [2022-11-20 21:17:29,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:29,852 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 73 transitions. [2022-11-20 21:17:29,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 73 transitions. [2022-11-20 21:17:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:17:29,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:29,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:29,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 21:17:30,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 21:17:30,058 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:30,059 INFO L85 PathProgramCache]: Analyzing trace with hash -493532250, now seen corresponding path program 1 times [2022-11-20 21:17:30,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:30,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071879147] [2022-11-20 21:17:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:30,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:17:30,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071879147] [2022-11-20 21:17:30,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071879147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513256940] [2022-11-20 21:17:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:30,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:30,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:30,163 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:30,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:17:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:30,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:17:30,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:17:30,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:17:30,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513256940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:30,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1080633862] [2022-11-20 21:17:30,304 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:30,304 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:30,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:30,305 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:30,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:30,444 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:30,592 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1045#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:30,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:30,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:30,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-20 21:17:30,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83054335] [2022-11-20 21:17:30,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:30,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:17:30,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:17:30,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:17:30,600 INFO L87 Difference]: Start difference. First operand 47 states and 73 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:30,711 INFO L93 Difference]: Finished difference Result 92 states and 135 transitions. [2022-11-20 21:17:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:17:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 21:17:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:30,714 INFO L225 Difference]: With dead ends: 92 [2022-11-20 21:17:30,714 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 21:17:30,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:17:30,716 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:30,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 14 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:17:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 21:17:30,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 59. [2022-11-20 21:17:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 58 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 90 transitions. [2022-11-20 21:17:30,747 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 90 transitions. Word has length 13 [2022-11-20 21:17:30,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:30,748 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 90 transitions. [2022-11-20 21:17:30,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:30,748 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 90 transitions. [2022-11-20 21:17:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:17:30,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:30,749 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:30,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:30,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 21:17:30,955 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:30,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:30,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2084828616, now seen corresponding path program 2 times [2022-11-20 21:17:30,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:30,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496467231] [2022-11-20 21:17:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:30,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:17:31,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496467231] [2022-11-20 21:17:31,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496467231] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:31,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614861347] [2022-11-20 21:17:31,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:17:31,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:31,064 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:31,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 21:17:31,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:17:31,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:17:31,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:17:31,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:17:31,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:17:31,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614861347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:31,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [194990069] [2022-11-20 21:17:31,260 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:31,260 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:31,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:31,261 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:31,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:31,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:31,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1426#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:31,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:31,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:31,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2022-11-20 21:17:31,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849764206] [2022-11-20 21:17:31,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:31,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:17:31,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:31,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:17:31,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-20 21:17:31,546 INFO L87 Difference]: Start difference. First operand 59 states and 90 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:31,935 INFO L93 Difference]: Finished difference Result 132 states and 197 transitions. [2022-11-20 21:17:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 21:17:31,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 21:17:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:31,937 INFO L225 Difference]: With dead ends: 132 [2022-11-20 21:17:31,937 INFO L226 Difference]: Without dead ends: 103 [2022-11-20 21:17:31,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-11-20 21:17:31,940 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 91 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:31,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 19 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:17:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-20 21:17:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2022-11-20 21:17:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 108 transitions. [2022-11-20 21:17:31,997 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 108 transitions. Word has length 14 [2022-11-20 21:17:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:31,997 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 108 transitions. [2022-11-20 21:17:31,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 108 transitions. [2022-11-20 21:17:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 21:17:32,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:32,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:32,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 21:17:32,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:32,209 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash -544946308, now seen corresponding path program 1 times [2022-11-20 21:17:32,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:32,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242280480] [2022-11-20 21:17:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:32,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:17:32,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:32,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242280480] [2022-11-20 21:17:32,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242280480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:32,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226111477] [2022-11-20 21:17:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:32,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:32,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:32,443 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:32,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:17:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:32,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:17:32,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:17:32,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:17:32,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226111477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:32,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836388939] [2022-11-20 21:17:32,608 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:32,609 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:32,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:32,609 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:32,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:32,791 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:32,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1936#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:32,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:32,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:32,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-11-20 21:17:32,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911082257] [2022-11-20 21:17:32,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:32,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:17:32,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:32,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:17:32,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:17:32,902 INFO L87 Difference]: Start difference. First operand 75 states and 108 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:33,022 INFO L93 Difference]: Finished difference Result 122 states and 179 transitions. [2022-11-20 21:17:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:17:33,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 21:17:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:33,023 INFO L225 Difference]: With dead ends: 122 [2022-11-20 21:17:33,023 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 21:17:33,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:17:33,026 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:33,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 13 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:17:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 21:17:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2022-11-20 21:17:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 89 transitions. [2022-11-20 21:17:33,071 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 89 transitions. Word has length 15 [2022-11-20 21:17:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:33,071 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 89 transitions. [2022-11-20 21:17:33,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 89 transitions. [2022-11-20 21:17:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 21:17:33,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:33,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:33,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:33,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:33,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:33,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:33,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1257387588, now seen corresponding path program 3 times [2022-11-20 21:17:33,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:33,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795878769] [2022-11-20 21:17:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:33,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:33,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:33,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795878769] [2022-11-20 21:17:33,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795878769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:33,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451703043] [2022-11-20 21:17:33,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:17:33,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:33,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:33,453 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:33,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:17:33,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:17:33,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:17:33,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:17:33,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:17:33,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:17:33,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451703043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:33,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [395249908] [2022-11-20 21:17:33,611 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:33,611 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:33,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:33,612 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:33,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:33,754 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:33,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2394#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:33,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:33,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:33,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2022-11-20 21:17:33,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103226378] [2022-11-20 21:17:33,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:33,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:17:33,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:33,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:17:33,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-20 21:17:33,936 INFO L87 Difference]: Start difference. First operand 60 states and 89 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:34,703 INFO L93 Difference]: Finished difference Result 154 states and 215 transitions. [2022-11-20 21:17:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 21:17:34,704 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 21:17:34,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:34,705 INFO L225 Difference]: With dead ends: 154 [2022-11-20 21:17:34,705 INFO L226 Difference]: Without dead ends: 117 [2022-11-20 21:17:34,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 21:17:34,706 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:34,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 79 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:17:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-20 21:17:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 69. [2022-11-20 21:17:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 68 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 92 transitions. [2022-11-20 21:17:34,746 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 92 transitions. Word has length 16 [2022-11-20 21:17:34,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:34,747 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 92 transitions. [2022-11-20 21:17:34,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 92 transitions. [2022-11-20 21:17:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 21:17:34,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:34,750 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:34,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:34,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 21:17:34,957 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:34,957 INFO L85 PathProgramCache]: Analyzing trace with hash -684329092, now seen corresponding path program 1 times [2022-11-20 21:17:34,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:34,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923931880] [2022-11-20 21:17:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:34,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 21:17:35,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:35,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923931880] [2022-11-20 21:17:35,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923931880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:35,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248439150] [2022-11-20 21:17:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:35,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:35,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:35,079 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:35,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 21:17:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:35,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:17:35,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 21:17:35,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 21:17:35,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248439150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:35,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691050451] [2022-11-20 21:17:35,297 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:35,297 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:35,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:35,298 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:35,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:35,434 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:35,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2957#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:35,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:35,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:35,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-11-20 21:17:35,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231279950] [2022-11-20 21:17:35,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:35,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 21:17:35,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 21:17:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-20 21:17:35,561 INFO L87 Difference]: Start difference. First operand 69 states and 92 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:36,060 INFO L93 Difference]: Finished difference Result 150 states and 214 transitions. [2022-11-20 21:17:36,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 21:17:36,061 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 21:17:36,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:36,062 INFO L225 Difference]: With dead ends: 150 [2022-11-20 21:17:36,062 INFO L226 Difference]: Without dead ends: 120 [2022-11-20 21:17:36,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-11-20 21:17:36,065 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:36,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 53 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:17:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-20 21:17:36,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2022-11-20 21:17:36,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.3764705882352941) internal successors, (117), 85 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 117 transitions. [2022-11-20 21:17:36,103 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 117 transitions. Word has length 17 [2022-11-20 21:17:36,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:36,103 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 117 transitions. [2022-11-20 21:17:36,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:36,104 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 117 transitions. [2022-11-20 21:17:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 21:17:36,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:36,105 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:36,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:36,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:36,311 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:36,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:36,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1168284031, now seen corresponding path program 2 times [2022-11-20 21:17:36,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:36,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532699937] [2022-11-20 21:17:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:36,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:17:36,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:36,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532699937] [2022-11-20 21:17:36,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532699937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:36,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840256061] [2022-11-20 21:17:36,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:17:36,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:36,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:36,509 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:36,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 21:17:36,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:17:36,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:17:36,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:17:36,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 21:17:36,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 21:17:36,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840256061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:36,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [119369422] [2022-11-20 21:17:36,646 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:36,646 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:36,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:36,647 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:36,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:36,764 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:36,882 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3542#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:36,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:36,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:36,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 12 [2022-11-20 21:17:36,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41829478] [2022-11-20 21:17:36,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:36,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:17:36,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:36,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:17:36,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:17:36,883 INFO L87 Difference]: Start difference. First operand 86 states and 117 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:37,636 INFO L93 Difference]: Finished difference Result 185 states and 275 transitions. [2022-11-20 21:17:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 21:17:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 21:17:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:37,637 INFO L225 Difference]: With dead ends: 185 [2022-11-20 21:17:37,637 INFO L226 Difference]: Without dead ends: 157 [2022-11-20 21:17:37,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 21:17:37,639 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:37,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 55 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:17:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-20 21:17:37,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 112. [2022-11-20 21:17:37,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.3693693693693694) internal successors, (152), 111 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:37,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 152 transitions. [2022-11-20 21:17:37,691 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 152 transitions. Word has length 18 [2022-11-20 21:17:37,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:37,691 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 152 transitions. [2022-11-20 21:17:37,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:37,692 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 152 transitions. [2022-11-20 21:17:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 21:17:37,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:37,692 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:37,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:37,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 21:17:37,903 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1008281574, now seen corresponding path program 4 times [2022-11-20 21:17:37,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:37,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181320409] [2022-11-20 21:17:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:37,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:38,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:38,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181320409] [2022-11-20 21:17:38,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181320409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:38,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224446281] [2022-11-20 21:17:38,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:17:38,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:38,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:38,130 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:38,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 21:17:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:38,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:17:38,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:17:38,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:17:38,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224446281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:38,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1371981398] [2022-11-20 21:17:38,327 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:38,328 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:38,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:38,328 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:38,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:38,458 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:38,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4284#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:38,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:38,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:38,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2022-11-20 21:17:38,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902568418] [2022-11-20 21:17:38,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:38,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 21:17:38,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:38,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 21:17:38,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-11-20 21:17:38,648 INFO L87 Difference]: Start difference. First operand 112 states and 152 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:41,510 INFO L93 Difference]: Finished difference Result 380 states and 496 transitions. [2022-11-20 21:17:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-20 21:17:41,510 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 21:17:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:41,516 INFO L225 Difference]: With dead ends: 380 [2022-11-20 21:17:41,516 INFO L226 Difference]: Without dead ends: 344 [2022-11-20 21:17:41,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=573, Invalid=5747, Unknown=0, NotChecked=0, Total=6320 [2022-11-20 21:17:41,519 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 202 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:41,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 133 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 21:17:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-20 21:17:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 133. [2022-11-20 21:17:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.371212121212121) internal successors, (181), 132 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2022-11-20 21:17:41,581 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 19 [2022-11-20 21:17:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:41,582 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2022-11-20 21:17:41,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2022-11-20 21:17:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 21:17:41,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:41,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:41,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:41,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 21:17:41,795 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:41,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:41,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1557436159, now seen corresponding path program 2 times [2022-11-20 21:17:41,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:41,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593611019] [2022-11-20 21:17:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:41,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 21:17:41,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:41,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593611019] [2022-11-20 21:17:41,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593611019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:41,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953871906] [2022-11-20 21:17:41,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:17:41,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:41,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:41,894 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:41,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 21:17:41,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:17:41,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:17:41,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:17:41,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 21:17:42,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 21:17:42,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953871906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:42,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256956737] [2022-11-20 21:17:42,046 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:42,047 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:42,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:42,047 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:42,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:42,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:42,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5473#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:42,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:42,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:42,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-20 21:17:42,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129696776] [2022-11-20 21:17:42,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:42,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:17:42,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:42,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:17:42,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:17:42,250 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:42,510 INFO L93 Difference]: Finished difference Result 222 states and 290 transitions. [2022-11-20 21:17:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:17:42,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 21:17:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:42,512 INFO L225 Difference]: With dead ends: 222 [2022-11-20 21:17:42,513 INFO L226 Difference]: Without dead ends: 211 [2022-11-20 21:17:42,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:17:42,514 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:42,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:17:42,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-20 21:17:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 145. [2022-11-20 21:17:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.3402777777777777) internal successors, (193), 144 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 193 transitions. [2022-11-20 21:17:42,591 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 193 transitions. Word has length 19 [2022-11-20 21:17:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:42,592 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 193 transitions. [2022-11-20 21:17:42,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 193 transitions. [2022-11-20 21:17:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 21:17:42,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:42,593 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:42,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-20 21:17:42,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:42,804 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:42,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash 868806658, now seen corresponding path program 3 times [2022-11-20 21:17:42,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:42,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24718208] [2022-11-20 21:17:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:42,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:17:43,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:43,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24718208] [2022-11-20 21:17:43,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24718208] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:43,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497387920] [2022-11-20 21:17:43,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:17:43,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:43,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:43,045 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:43,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 21:17:43,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:17:43,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:17:43,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 21:17:43,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 21:17:43,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 21:17:43,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497387920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:43,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2095506800] [2022-11-20 21:17:43,369 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:43,369 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:43,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:43,370 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:43,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:43,491 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:43,648 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6335#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:43,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:43,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:43,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 7] total 19 [2022-11-20 21:17:43,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741558161] [2022-11-20 21:17:43,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:43,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 21:17:43,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:43,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 21:17:43,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-11-20 21:17:43,650 INFO L87 Difference]: Start difference. First operand 145 states and 193 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:44,783 INFO L93 Difference]: Finished difference Result 298 states and 434 transitions. [2022-11-20 21:17:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 21:17:44,784 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 21:17:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:44,787 INFO L225 Difference]: With dead ends: 298 [2022-11-20 21:17:44,787 INFO L226 Difference]: Without dead ends: 261 [2022-11-20 21:17:44,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 21:17:44,791 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:44,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 81 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:17:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-20 21:17:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 172. [2022-11-20 21:17:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.3742690058479532) internal successors, (235), 171 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 235 transitions. [2022-11-20 21:17:44,880 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 235 transitions. Word has length 21 [2022-11-20 21:17:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:44,881 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 235 transitions. [2022-11-20 21:17:44,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 235 transitions. [2022-11-20 21:17:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 21:17:44,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:44,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:44,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:45,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:45,088 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash -765837075, now seen corresponding path program 4 times [2022-11-20 21:17:45,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:45,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604662407] [2022-11-20 21:17:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:45,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:17:45,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:45,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604662407] [2022-11-20 21:17:45,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604662407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:45,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640004299] [2022-11-20 21:17:45,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:17:45,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:45,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:45,248 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:45,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 21:17:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:17:45,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:17:45,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:17:45,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640004299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:45,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712762360] [2022-11-20 21:17:45,394 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:45,395 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:45,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:45,398 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:45,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:45,534 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:45,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7432#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:45,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:45,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:45,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-20 21:17:45,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975039106] [2022-11-20 21:17:45,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:45,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:17:45,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:45,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:17:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-20 21:17:45,637 INFO L87 Difference]: Start difference. First operand 172 states and 235 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:45,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:45,888 INFO L93 Difference]: Finished difference Result 281 states and 387 transitions. [2022-11-20 21:17:45,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:17:45,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 21:17:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:45,890 INFO L225 Difference]: With dead ends: 281 [2022-11-20 21:17:45,890 INFO L226 Difference]: Without dead ends: 210 [2022-11-20 21:17:45,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 21:17:45,891 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:45,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:17:45,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-20 21:17:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2022-11-20 21:17:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.3757575757575757) internal successors, (227), 165 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 227 transitions. [2022-11-20 21:17:45,986 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 227 transitions. Word has length 21 [2022-11-20 21:17:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:45,987 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 227 transitions. [2022-11-20 21:17:45,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 227 transitions. [2022-11-20 21:17:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 21:17:45,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:45,991 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:45,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:46,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 21:17:46,197 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:46,197 INFO L85 PathProgramCache]: Analyzing trace with hash -700177276, now seen corresponding path program 5 times [2022-11-20 21:17:46,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:46,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001351903] [2022-11-20 21:17:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:46,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:17:46,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:46,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001351903] [2022-11-20 21:17:46,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001351903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:46,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758525950] [2022-11-20 21:17:46,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:17:46,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:46,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:46,483 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:46,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 21:17:46,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 21:17:46,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:17:46,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:17:46,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:17:46,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:17:46,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758525950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:46,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [428536923] [2022-11-20 21:17:46,730 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:46,730 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:46,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:46,730 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:46,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:46,846 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:47,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8459#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:47,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:47,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:47,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-11-20 21:17:47,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231395009] [2022-11-20 21:17:47,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:47,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 21:17:47,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:47,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 21:17:47,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2022-11-20 21:17:47,037 INFO L87 Difference]: Start difference. First operand 166 states and 227 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:52,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:52,747 INFO L93 Difference]: Finished difference Result 590 states and 772 transitions. [2022-11-20 21:17:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-20 21:17:52,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 21:17:52,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:52,753 INFO L225 Difference]: With dead ends: 590 [2022-11-20 21:17:52,754 INFO L226 Difference]: Without dead ends: 523 [2022-11-20 21:17:52,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4782 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1030, Invalid=13012, Unknown=0, NotChecked=0, Total=14042 [2022-11-20 21:17:52,759 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 327 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:52,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 176 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 21:17:52,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-11-20 21:17:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 192. [2022-11-20 21:17:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.3717277486910995) internal successors, (262), 191 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 262 transitions. [2022-11-20 21:17:52,859 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 262 transitions. Word has length 22 [2022-11-20 21:17:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:52,860 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 262 transitions. [2022-11-20 21:17:52,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:52,860 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 262 transitions. [2022-11-20 21:17:52,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 21:17:52,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:52,861 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:52,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:53,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 21:17:53,066 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:53,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1453159684, now seen corresponding path program 3 times [2022-11-20 21:17:53,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:53,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173939210] [2022-11-20 21:17:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:53,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 21:17:53,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:53,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173939210] [2022-11-20 21:17:53,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173939210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:53,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263190925] [2022-11-20 21:17:53,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:17:53,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:53,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:53,320 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:53,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 21:17:53,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:17:53,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:17:53,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:17:53,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 21:17:53,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 21:17:53,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263190925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:53,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [654264209] [2022-11-20 21:17:53,492 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:53,492 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:53,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:53,493 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:53,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:53,622 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:53,782 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10268#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:53,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:53,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:53,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 18 [2022-11-20 21:17:53,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826341099] [2022-11-20 21:17:53,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:53,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 21:17:53,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:53,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 21:17:53,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2022-11-20 21:17:53,784 INFO L87 Difference]: Start difference. First operand 192 states and 262 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:57,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:17:57,570 INFO L93 Difference]: Finished difference Result 576 states and 805 transitions. [2022-11-20 21:17:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-20 21:17:57,570 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 21:17:57,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:17:57,573 INFO L225 Difference]: With dead ends: 576 [2022-11-20 21:17:57,573 INFO L226 Difference]: Without dead ends: 522 [2022-11-20 21:17:57,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3416 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=630, Invalid=10082, Unknown=0, NotChecked=0, Total=10712 [2022-11-20 21:17:57,576 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 189 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1873 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:17:57,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 153 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1873 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 21:17:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-11-20 21:17:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 235. [2022-11-20 21:17:57,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.3504273504273505) internal successors, (316), 234 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 316 transitions. [2022-11-20 21:17:57,671 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 316 transitions. Word has length 23 [2022-11-20 21:17:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:17:57,671 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 316 transitions. [2022-11-20 21:17:57,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:17:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 316 transitions. [2022-11-20 21:17:57,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 21:17:57,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:17:57,673 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:17:57,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 21:17:57,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:57,879 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:17:57,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:17:57,879 INFO L85 PathProgramCache]: Analyzing trace with hash -493613111, now seen corresponding path program 4 times [2022-11-20 21:17:57,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:17:57,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722189715] [2022-11-20 21:17:57,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:17:57,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:17:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:17:58,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:17:58,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722189715] [2022-11-20 21:17:58,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722189715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:17:58,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717366819] [2022-11-20 21:17:58,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:17:58,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:17:58,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:17:58,157 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:17:58,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 21:17:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:17:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 21:17:58,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:17:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:17:58,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:17:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 21:17:58,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717366819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:17:58,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [38312495] [2022-11-20 21:17:58,520 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:17:58,520 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:17:58,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:17:58,520 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:17:58,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:17:58,630 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:17:58,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12169#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:17:58,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:17:58,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:17:58,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 7] total 22 [2022-11-20 21:17:58,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272598221] [2022-11-20 21:17:58,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:17:58,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 21:17:58,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:17:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 21:17:58,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-11-20 21:17:58,789 INFO L87 Difference]: Start difference. First operand 235 states and 316 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:01,257 INFO L93 Difference]: Finished difference Result 428 states and 626 transitions. [2022-11-20 21:18:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-20 21:18:01,259 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 21:18:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:01,261 INFO L225 Difference]: With dead ends: 428 [2022-11-20 21:18:01,261 INFO L226 Difference]: Without dead ends: 390 [2022-11-20 21:18:01,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=531, Invalid=4299, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 21:18:01,263 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 119 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:01,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 115 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:18:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-20 21:18:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 232. [2022-11-20 21:18:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.3463203463203464) internal successors, (311), 231 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 311 transitions. [2022-11-20 21:18:01,380 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 311 transitions. Word has length 24 [2022-11-20 21:18:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:01,381 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 311 transitions. [2022-11-20 21:18:01,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 311 transitions. [2022-11-20 21:18:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 21:18:01,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:01,382 INFO L195 NwaCegarLoop]: trace histogram [9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:01,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:01,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:01,584 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:18:01,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:01,584 INFO L85 PathProgramCache]: Analyzing trace with hash 37296071, now seen corresponding path program 1 times [2022-11-20 21:18:01,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:01,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049364113] [2022-11-20 21:18:01,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:01,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:18:01,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:01,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049364113] [2022-11-20 21:18:01,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049364113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:01,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543874444] [2022-11-20 21:18:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:01,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:01,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:01,864 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:01,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 21:18:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:01,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 21:18:01,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:18:02,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 21:18:02,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543874444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:18:02,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1769134670] [2022-11-20 21:18:02,283 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:18:02,283 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:02,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:02,284 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:02,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:02,412 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:02,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13735#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:02,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:02,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:18:02,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 8] total 25 [2022-11-20 21:18:02,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057893230] [2022-11-20 21:18:02,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:02,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 21:18:02,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:02,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 21:18:02,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-11-20 21:18:02,581 INFO L87 Difference]: Start difference. First operand 232 states and 311 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:06,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:06,172 INFO L93 Difference]: Finished difference Result 449 states and 644 transitions. [2022-11-20 21:18:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-20 21:18:06,173 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 21:18:06,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:06,175 INFO L225 Difference]: With dead ends: 449 [2022-11-20 21:18:06,175 INFO L226 Difference]: Without dead ends: 395 [2022-11-20 21:18:06,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=749, Invalid=6733, Unknown=0, NotChecked=0, Total=7482 [2022-11-20 21:18:06,179 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:06,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 134 Invalid, 2051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1852 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 21:18:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-20 21:18:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 252. [2022-11-20 21:18:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.342629482071713) internal successors, (337), 251 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 337 transitions. [2022-11-20 21:18:06,333 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 337 transitions. Word has length 25 [2022-11-20 21:18:06,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:06,333 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 337 transitions. [2022-11-20 21:18:06,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 337 transitions. [2022-11-20 21:18:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 21:18:06,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:06,335 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:06,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:06,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:06,539 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:18:06,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:06,539 INFO L85 PathProgramCache]: Analyzing trace with hash 801453094, now seen corresponding path program 6 times [2022-11-20 21:18:06,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:06,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570356467] [2022-11-20 21:18:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:06,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:18:06,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570356467] [2022-11-20 21:18:06,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570356467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275166338] [2022-11-20 21:18:06,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:18:06,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:06,847 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:06,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 21:18:06,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:18:06,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:18:06,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:18:06,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 21:18:07,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 21:18:07,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275166338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:18:07,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925727053] [2022-11-20 21:18:07,118 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:18:07,118 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:07,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:07,118 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:07,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:07,202 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:07,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15401#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:07,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:07,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:18:07,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2022-11-20 21:18:07,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533558407] [2022-11-20 21:18:07,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:07,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 21:18:07,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:07,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 21:18:07,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-11-20 21:18:07,425 INFO L87 Difference]: Start difference. First operand 252 states and 337 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:22,734 INFO L93 Difference]: Finished difference Result 986 states and 1239 transitions. [2022-11-20 21:18:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-11-20 21:18:22,735 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 21:18:22,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:22,739 INFO L225 Difference]: With dead ends: 986 [2022-11-20 21:18:22,739 INFO L226 Difference]: Without dead ends: 915 [2022-11-20 21:18:22,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15923 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=2408, Invalid=38194, Unknown=0, NotChecked=0, Total=40602 [2022-11-20 21:18:22,747 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 561 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 2135 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 2604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 2135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:22,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 282 Invalid, 2604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 2135 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-20 21:18:22,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-11-20 21:18:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 285. [2022-11-20 21:18:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.3450704225352113) internal successors, (382), 284 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 382 transitions. [2022-11-20 21:18:22,944 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 382 transitions. Word has length 25 [2022-11-20 21:18:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:22,944 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 382 transitions. [2022-11-20 21:18:22,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 382 transitions. [2022-11-20 21:18:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 21:18:22,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:22,945 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:22,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-20 21:18:23,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:23,151 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:18:23,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:23,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1702454202, now seen corresponding path program 5 times [2022-11-20 21:18:23,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:23,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360436531] [2022-11-20 21:18:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:23,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 21:18:23,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:23,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360436531] [2022-11-20 21:18:23,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360436531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:23,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789920076] [2022-11-20 21:18:23,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:18:23,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:23,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:23,283 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:23,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 21:18:23,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 21:18:23,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:18:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:18:23,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 21:18:23,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 21:18:23,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789920076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:18:23,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603087433] [2022-11-20 21:18:23,459 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:18:23,459 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:23,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:23,460 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:23,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:23,557 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:23,657 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18300#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:23,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:23,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:18:23,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-20 21:18:23,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737743721] [2022-11-20 21:18:23,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:23,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:18:23,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:23,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:18:23,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:18:23,658 INFO L87 Difference]: Start difference. First operand 285 states and 382 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:24,435 INFO L93 Difference]: Finished difference Result 530 states and 674 transitions. [2022-11-20 21:18:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 21:18:24,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 21:18:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:24,441 INFO L225 Difference]: With dead ends: 530 [2022-11-20 21:18:24,441 INFO L226 Difference]: Without dead ends: 506 [2022-11-20 21:18:24,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:18:24,442 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:24,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 46 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:18:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-20 21:18:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 288. [2022-11-20 21:18:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.3379790940766552) internal successors, (384), 287 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 384 transitions. [2022-11-20 21:18:24,631 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 384 transitions. Word has length 25 [2022-11-20 21:18:24,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:24,632 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 384 transitions. [2022-11-20 21:18:24,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 384 transitions. [2022-11-20 21:18:24,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 21:18:24,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:24,633 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:24,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:24,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 21:18:24,833 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:18:24,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash 532210669, now seen corresponding path program 2 times [2022-11-20 21:18:24,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:24,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798113849] [2022-11-20 21:18:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:24,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 21:18:25,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:25,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798113849] [2022-11-20 21:18:25,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798113849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:25,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11634056] [2022-11-20 21:18:25,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:18:25,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:25,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:25,128 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:25,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 21:18:25,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:18:25,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:18:25,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:18:25,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 21:18:25,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 21:18:25,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11634056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:18:25,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [551291322] [2022-11-20 21:18:25,289 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:18:25,289 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:25,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:25,289 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:25,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:25,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:25,546 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20094#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:25,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:25,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:18:25,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 19 [2022-11-20 21:18:25,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980278694] [2022-11-20 21:18:25,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:25,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 21:18:25,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:25,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 21:18:25,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-11-20 21:18:25,547 INFO L87 Difference]: Start difference. First operand 288 states and 384 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:26,850 INFO L93 Difference]: Finished difference Result 592 states and 879 transitions. [2022-11-20 21:18:26,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 21:18:26,851 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 21:18:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:26,853 INFO L225 Difference]: With dead ends: 592 [2022-11-20 21:18:26,853 INFO L226 Difference]: Without dead ends: 540 [2022-11-20 21:18:26,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 21:18:26,854 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:26,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 209 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 21:18:26,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-20 21:18:27,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 341. [2022-11-20 21:18:27,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.3647058823529412) internal successors, (464), 340 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 464 transitions. [2022-11-20 21:18:27,054 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 464 transitions. Word has length 27 [2022-11-20 21:18:27,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:27,055 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 464 transitions. [2022-11-20 21:18:27,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:27,055 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 464 transitions. [2022-11-20 21:18:27,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 21:18:27,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:27,056 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:27,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:27,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:27,261 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:18:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:27,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1813364321, now seen corresponding path program 5 times [2022-11-20 21:18:27,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:27,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383683674] [2022-11-20 21:18:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:27,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 21:18:27,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:27,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383683674] [2022-11-20 21:18:27,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383683674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:27,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562464143] [2022-11-20 21:18:27,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:18:27,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:27,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:27,515 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:27,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 21:18:27,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 21:18:27,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:18:27,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 21:18:27,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 21:18:27,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 21:18:27,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562464143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:18:27,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039324191] [2022-11-20 21:18:27,888 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:18:27,888 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:27,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:27,889 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:27,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:28,000 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:28,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22151#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:28,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:28,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:18:28,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 24 [2022-11-20 21:18:28,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865022261] [2022-11-20 21:18:28,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:28,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 21:18:28,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:28,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 21:18:28,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-11-20 21:18:28,182 INFO L87 Difference]: Start difference. First operand 341 states and 464 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:40,221 INFO L93 Difference]: Finished difference Result 1403 states and 1820 transitions. [2022-11-20 21:18:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-11-20 21:18:40,221 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 21:18:40,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:40,224 INFO L225 Difference]: With dead ends: 1403 [2022-11-20 21:18:40,225 INFO L226 Difference]: Without dead ends: 1238 [2022-11-20 21:18:40,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13195 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2789, Invalid=32367, Unknown=0, NotChecked=0, Total=35156 [2022-11-20 21:18:40,229 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 553 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 2948 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 3376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 2948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:40,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 401 Invalid, 3376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 2948 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-20 21:18:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2022-11-20 21:18:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 384. [2022-11-20 21:18:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.328981723237598) internal successors, (509), 383 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 509 transitions. [2022-11-20 21:18:40,473 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 509 transitions. Word has length 27 [2022-11-20 21:18:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:40,473 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 509 transitions. [2022-11-20 21:18:40,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 509 transitions. [2022-11-20 21:18:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 21:18:40,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:40,474 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:40,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:40,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 21:18:40,675 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:18:40,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:40,675 INFO L85 PathProgramCache]: Analyzing trace with hash -834141604, now seen corresponding path program 6 times [2022-11-20 21:18:40,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:40,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320526827] [2022-11-20 21:18:40,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:40,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:18:40,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:40,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320526827] [2022-11-20 21:18:40,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320526827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:40,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349198908] [2022-11-20 21:18:40,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:18:40,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:40,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:40,893 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:40,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 21:18:40,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:18:40,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:18:40,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:18:40,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 21:18:41,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 21:18:41,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349198908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:18:41,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [824252817] [2022-11-20 21:18:41,046 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:18:41,046 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:41,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:41,047 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:41,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:41,151 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:41,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26073#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:41,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:41,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:18:41,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-11-20 21:18:41,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741571778] [2022-11-20 21:18:41,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:41,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:18:41,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:41,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:18:41,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-20 21:18:41,293 INFO L87 Difference]: Start difference. First operand 384 states and 509 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:41,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:41,944 INFO L93 Difference]: Finished difference Result 503 states and 668 transitions. [2022-11-20 21:18:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:18:41,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 21:18:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:41,947 INFO L225 Difference]: With dead ends: 503 [2022-11-20 21:18:41,947 INFO L226 Difference]: Without dead ends: 480 [2022-11-20 21:18:41,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:18:41,948 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:41,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 51 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:18:41,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-11-20 21:18:42,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 380. [2022-11-20 21:18:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.345646437994723) internal successors, (510), 379 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 510 transitions. [2022-11-20 21:18:42,265 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 510 transitions. Word has length 27 [2022-11-20 21:18:42,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:42,266 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 510 transitions. [2022-11-20 21:18:42,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:42,266 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 510 transitions. [2022-11-20 21:18:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 21:18:42,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:42,267 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:42,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:42,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:42,472 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:18:42,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:42,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1594846957, now seen corresponding path program 6 times [2022-11-20 21:18:42,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:42,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107175659] [2022-11-20 21:18:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:42,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:18:42,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:42,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107175659] [2022-11-20 21:18:42,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107175659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:42,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028269968] [2022-11-20 21:18:42,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:18:42,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:42,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:42,818 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:42,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 21:18:42,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:18:42,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:18:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 21:18:42,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 21:18:43,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-20 21:18:43,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028269968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:18:43,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [46246729] [2022-11-20 21:18:43,231 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:18:43,232 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:43,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:43,232 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:43,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:43,330 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:43,517 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28014#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:43,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:43,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:18:43,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 8] total 26 [2022-11-20 21:18:43,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237210405] [2022-11-20 21:18:43,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:43,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 21:18:43,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:43,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 21:18:43,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-11-20 21:18:43,520 INFO L87 Difference]: Start difference. First operand 380 states and 510 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:47,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:18:47,739 INFO L93 Difference]: Finished difference Result 738 states and 1074 transitions. [2022-11-20 21:18:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-20 21:18:47,740 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 21:18:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:18:47,742 INFO L225 Difference]: With dead ends: 738 [2022-11-20 21:18:47,743 INFO L226 Difference]: Without dead ends: 608 [2022-11-20 21:18:47,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=457, Invalid=5863, Unknown=0, NotChecked=0, Total=6320 [2022-11-20 21:18:47,744 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 115 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:18:47,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 296 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2108 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 21:18:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-20 21:18:48,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 431. [2022-11-20 21:18:48,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 1.344186046511628) internal successors, (578), 430 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 578 transitions. [2022-11-20 21:18:48,088 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 578 transitions. Word has length 28 [2022-11-20 21:18:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:18:48,088 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 578 transitions. [2022-11-20 21:18:48,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:18:48,088 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 578 transitions. [2022-11-20 21:18:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 21:18:48,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:18:48,089 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:18:48,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 21:18:48,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:48,291 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:18:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:18:48,291 INFO L85 PathProgramCache]: Analyzing trace with hash 647943749, now seen corresponding path program 7 times [2022-11-20 21:18:48,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:18:48,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787087375] [2022-11-20 21:18:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:18:48,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:18:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 21:18:48,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:18:48,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787087375] [2022-11-20 21:18:48,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787087375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:18:48,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544777790] [2022-11-20 21:18:48,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:18:48,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:18:48,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:18:48,566 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:18:48,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 21:18:48,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:18:48,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 21:18:48,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:18:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 21:18:48,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:18:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 21:18:48,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544777790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:18:48,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1073018447] [2022-11-20 21:18:48,852 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:18:48,852 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:18:48,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:18:48,852 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:18:48,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:18:48,951 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:18:49,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30630#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:18:49,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:18:49,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:18:49,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2022-11-20 21:18:49,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271155237] [2022-11-20 21:18:49,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:18:49,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 21:18:49,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:18:49,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 21:18:49,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2022-11-20 21:18:49,132 INFO L87 Difference]: Start difference. First operand 431 states and 578 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:00,065 INFO L93 Difference]: Finished difference Result 1166 states and 1455 transitions. [2022-11-20 21:19:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-11-20 21:19:00,066 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 21:19:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:00,070 INFO L225 Difference]: With dead ends: 1166 [2022-11-20 21:19:00,070 INFO L226 Difference]: Without dead ends: 1086 [2022-11-20 21:19:00,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11706 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1697, Invalid=29455, Unknown=0, NotChecked=0, Total=31152 [2022-11-20 21:19:00,073 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 376 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 2263 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 2263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:00,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 310 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 2263 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 21:19:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-11-20 21:19:00,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 449. [2022-11-20 21:19:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.3303571428571428) internal successors, (596), 448 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:00,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 596 transitions. [2022-11-20 21:19:00,450 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 596 transitions. Word has length 30 [2022-11-20 21:19:00,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:00,451 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 596 transitions. [2022-11-20 21:19:00,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 596 transitions. [2022-11-20 21:19:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 21:19:00,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:00,453 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:00,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 21:19:00,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 21:19:00,663 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:19:00,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:00,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1960360221, now seen corresponding path program 3 times [2022-11-20 21:19:00,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:00,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877410022] [2022-11-20 21:19:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:00,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:19:01,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:01,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877410022] [2022-11-20 21:19:01,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877410022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:01,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724609447] [2022-11-20 21:19:01,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:19:01,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:01,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:01,037 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:01,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 21:19:01,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:19:01,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:19:01,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 21:19:01,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 21:19:01,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-20 21:19:01,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724609447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:19:01,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [14356681] [2022-11-20 21:19:01,437 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:19:01,437 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:01,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:01,437 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:01,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:01,545 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:01,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34254#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:19:01,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:01,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:19:01,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 8] total 28 [2022-11-20 21:19:01,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840998134] [2022-11-20 21:19:01,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:01,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 21:19:01,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:01,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 21:19:01,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 21:19:01,733 INFO L87 Difference]: Start difference. First operand 449 states and 596 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:03,661 INFO L93 Difference]: Finished difference Result 865 states and 1288 transitions. [2022-11-20 21:19:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 21:19:03,661 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 21:19:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:03,663 INFO L225 Difference]: With dead ends: 865 [2022-11-20 21:19:03,663 INFO L226 Difference]: Without dead ends: 779 [2022-11-20 21:19:03,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 21:19:03,664 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 322 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:03,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 246 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 21:19:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-11-20 21:19:04,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 447. [2022-11-20 21:19:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.34304932735426) internal successors, (599), 446 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:04,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 599 transitions. [2022-11-20 21:19:04,033 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 599 transitions. Word has length 31 [2022-11-20 21:19:04,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:04,033 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 599 transitions. [2022-11-20 21:19:04,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 599 transitions. [2022-11-20 21:19:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 21:19:04,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:04,034 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:04,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 21:19:04,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 21:19:04,240 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:19:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:04,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1390861068, now seen corresponding path program 7 times [2022-11-20 21:19:04,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:04,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518478290] [2022-11-20 21:19:04,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:04,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 21:19:04,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518478290] [2022-11-20 21:19:04,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518478290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:04,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390681808] [2022-11-20 21:19:04,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:19:04,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:04,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:04,533 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:04,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 21:19:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:04,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 21:19:04,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:19:04,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 21:19:04,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390681808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:19:04,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [572876057] [2022-11-20 21:19:04,984 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:19:04,984 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:04,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:04,984 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:04,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:05,066 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:05,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37099#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:19:05,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:05,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:19:05,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 9] total 26 [2022-11-20 21:19:05,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65788033] [2022-11-20 21:19:05,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:05,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 21:19:05,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:05,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 21:19:05,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2022-11-20 21:19:05,294 INFO L87 Difference]: Start difference. First operand 447 states and 599 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:09,408 INFO L93 Difference]: Finished difference Result 1046 states and 1509 transitions. [2022-11-20 21:19:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-20 21:19:09,408 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 21:19:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:09,413 INFO L225 Difference]: With dead ends: 1046 [2022-11-20 21:19:09,413 INFO L226 Difference]: Without dead ends: 930 [2022-11-20 21:19:09,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1887 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1331, Invalid=6501, Unknown=0, NotChecked=0, Total=7832 [2022-11-20 21:19:09,415 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 263 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 2203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:09,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 90 Invalid, 2203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1977 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 21:19:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-11-20 21:19:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 548. [2022-11-20 21:19:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.363802559414991) internal successors, (746), 547 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 746 transitions. [2022-11-20 21:19:09,870 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 746 transitions. Word has length 31 [2022-11-20 21:19:09,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:09,870 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 746 transitions. [2022-11-20 21:19:09,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:09,871 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 746 transitions. [2022-11-20 21:19:09,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 21:19:09,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:09,872 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:09,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 21:19:10,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:10,077 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:19:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:10,078 INFO L85 PathProgramCache]: Analyzing trace with hash -11160841, now seen corresponding path program 4 times [2022-11-20 21:19:10,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:10,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126523449] [2022-11-20 21:19:10,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:10,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 21:19:10,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:10,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126523449] [2022-11-20 21:19:10,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126523449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:10,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298881620] [2022-11-20 21:19:10,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:19:10,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:10,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:10,503 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:10,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 21:19:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:10,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 21:19:10,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 21:19:10,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-20 21:19:10,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298881620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:19:10,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [238072045] [2022-11-20 21:19:10,823 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:19:10,823 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:10,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:10,824 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:10,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:10,918 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:11,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40628#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:19:11,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:11,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:19:11,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 6] total 24 [2022-11-20 21:19:11,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226509885] [2022-11-20 21:19:11,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:11,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 21:19:11,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:11,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 21:19:11,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2022-11-20 21:19:11,099 INFO L87 Difference]: Start difference. First operand 548 states and 746 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:13,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:13,684 INFO L93 Difference]: Finished difference Result 1067 states and 1588 transitions. [2022-11-20 21:19:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 21:19:13,684 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 21:19:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:13,687 INFO L225 Difference]: With dead ends: 1067 [2022-11-20 21:19:13,687 INFO L226 Difference]: Without dead ends: 972 [2022-11-20 21:19:13,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=370, Invalid=1522, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 21:19:13,689 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 171 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:13,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 323 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 21:19:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-11-20 21:19:14,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 670. [2022-11-20 21:19:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 1.345291479820628) internal successors, (900), 669 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 900 transitions. [2022-11-20 21:19:14,239 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 900 transitions. Word has length 33 [2022-11-20 21:19:14,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:14,239 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 900 transitions. [2022-11-20 21:19:14,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 900 transitions. [2022-11-20 21:19:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 21:19:14,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:14,241 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:14,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 21:19:14,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:14,446 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:19:14,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:14,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1633426598, now seen corresponding path program 8 times [2022-11-20 21:19:14,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:14,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860074395] [2022-11-20 21:19:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:14,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 21:19:14,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:14,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860074395] [2022-11-20 21:19:14,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860074395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:14,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516925385] [2022-11-20 21:19:14,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:19:14,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:14,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:14,795 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:14,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 21:19:14,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 21:19:14,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:19:14,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:19:14,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-20 21:19:15,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-20 21:19:15,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516925385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:19:15,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [3932952] [2022-11-20 21:19:15,495 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:19:15,495 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:15,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:15,495 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:15,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:15,578 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:15,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44352#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:19:15,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:15,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:19:15,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 34 [2022-11-20 21:19:15,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387656373] [2022-11-20 21:19:15,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:15,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 21:19:15,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:15,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 21:19:15,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1317, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 21:19:15,817 INFO L87 Difference]: Start difference. First operand 670 states and 900 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:25,894 INFO L93 Difference]: Finished difference Result 1925 states and 2868 transitions. [2022-11-20 21:19:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-20 21:19:25,894 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 21:19:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:25,897 INFO L225 Difference]: With dead ends: 1925 [2022-11-20 21:19:25,898 INFO L226 Difference]: Without dead ends: 1770 [2022-11-20 21:19:25,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3857 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2390, Invalid=11182, Unknown=0, NotChecked=0, Total=13572 [2022-11-20 21:19:25,899 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 421 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 3416 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 3883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 3416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:25,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 77 Invalid, 3883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 3416 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 21:19:25,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2022-11-20 21:19:27,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 891. [2022-11-20 21:19:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 1.348314606741573) internal successors, (1200), 890 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1200 transitions. [2022-11-20 21:19:27,011 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1200 transitions. Word has length 33 [2022-11-20 21:19:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:27,012 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1200 transitions. [2022-11-20 21:19:27,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1200 transitions. [2022-11-20 21:19:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 21:19:27,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:27,014 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:27,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 21:19:27,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-20 21:19:27,219 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:19:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash 743480845, now seen corresponding path program 7 times [2022-11-20 21:19:27,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:27,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526397904] [2022-11-20 21:19:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:27,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 21:19:27,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:27,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526397904] [2022-11-20 21:19:27,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526397904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:27,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322614048] [2022-11-20 21:19:27,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:19:27,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:27,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:27,508 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:27,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 21:19:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:27,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:19:27,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 21:19:27,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 21:19:27,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322614048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:19:27,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127496168] [2022-11-20 21:19:27,665 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:19:27,665 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:27,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:27,666 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:27,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:27,763 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:27,883 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50359#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:19:27,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:27,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:19:27,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-11-20 21:19:27,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259740670] [2022-11-20 21:19:27,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:27,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 21:19:27,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 21:19:27,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:19:27,885 INFO L87 Difference]: Start difference. First operand 891 states and 1200 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:29,836 INFO L93 Difference]: Finished difference Result 1256 states and 1611 transitions. [2022-11-20 21:19:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:19:29,837 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-20 21:19:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:29,840 INFO L225 Difference]: With dead ends: 1256 [2022-11-20 21:19:29,840 INFO L226 Difference]: Without dead ends: 1228 [2022-11-20 21:19:29,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-20 21:19:29,841 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:29,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 72 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:19:29,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-11-20 21:19:30,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 899. [2022-11-20 21:19:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.3530066815144766) internal successors, (1215), 898 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1215 transitions. [2022-11-20 21:19:30,680 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1215 transitions. Word has length 33 [2022-11-20 21:19:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:30,680 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1215 transitions. [2022-11-20 21:19:30,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1215 transitions. [2022-11-20 21:19:30,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 21:19:30,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:30,682 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:30,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 21:19:30,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:30,889 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:19:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:30,889 INFO L85 PathProgramCache]: Analyzing trace with hash -168166660, now seen corresponding path program 8 times [2022-11-20 21:19:30,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:30,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400280475] [2022-11-20 21:19:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:30,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 21:19:31,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:31,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400280475] [2022-11-20 21:19:31,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400280475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:31,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250579882] [2022-11-20 21:19:31,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:19:31,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:31,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:31,227 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:31,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 21:19:31,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 21:19:31,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:19:31,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 21:19:31,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 21:19:31,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 21:19:31,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250579882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:19:31,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2141357664] [2022-11-20 21:19:31,603 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:19:31,603 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:31,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:31,604 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:31,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:31,702 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:31,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54875#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:19:31,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:31,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:19:31,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2022-11-20 21:19:31,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712016311] [2022-11-20 21:19:31,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:31,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 21:19:31,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 21:19:31,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-11-20 21:19:31,845 INFO L87 Difference]: Start difference. First operand 899 states and 1215 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:37,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:37,124 INFO L93 Difference]: Finished difference Result 2024 states and 2571 transitions. [2022-11-20 21:19:37,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 21:19:37,125 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-20 21:19:37,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:37,129 INFO L225 Difference]: With dead ends: 2024 [2022-11-20 21:19:37,129 INFO L226 Difference]: Without dead ends: 1914 [2022-11-20 21:19:37,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 21:19:37,130 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 177 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:37,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 170 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 21:19:37,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2022-11-20 21:19:38,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 983. [2022-11-20 21:19:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 1.3411405295315681) internal successors, (1317), 982 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1317 transitions. [2022-11-20 21:19:38,010 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1317 transitions. Word has length 35 [2022-11-20 21:19:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:38,010 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 1317 transitions. [2022-11-20 21:19:38,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1317 transitions. [2022-11-20 21:19:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 21:19:38,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:38,013 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:38,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 21:19:38,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-20 21:19:38,223 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:19:38,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:38,223 INFO L85 PathProgramCache]: Analyzing trace with hash -491330695, now seen corresponding path program 9 times [2022-11-20 21:19:38,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:38,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46712453] [2022-11-20 21:19:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:38,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 21:19:38,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:38,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46712453] [2022-11-20 21:19:38,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46712453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:38,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039593351] [2022-11-20 21:19:38,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:19:38,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:38,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:38,675 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:38,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 21:19:38,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:19:38,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:19:38,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 21:19:38,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:19:38,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-20 21:19:39,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039593351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:19:39,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [89690963] [2022-11-20 21:19:39,009 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:19:39,009 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:39,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:39,010 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:39,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:39,117 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:39,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '61078#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:19:39,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:39,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:19:39,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 6] total 25 [2022-11-20 21:19:39,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592540208] [2022-11-20 21:19:39,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:39,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 21:19:39,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:39,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 21:19:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-11-20 21:19:39,320 INFO L87 Difference]: Start difference. First operand 983 states and 1317 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:42,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:19:42,910 INFO L93 Difference]: Finished difference Result 1880 states and 2646 transitions. [2022-11-20 21:19:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 21:19:42,911 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-20 21:19:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:19:42,917 INFO L225 Difference]: With dead ends: 1880 [2022-11-20 21:19:42,917 INFO L226 Difference]: Without dead ends: 1547 [2022-11-20 21:19:42,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 21:19:42,918 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 233 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:19:42,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 338 Invalid, 2213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 21:19:42,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2022-11-20 21:19:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1020. [2022-11-20 21:19:43,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 1.3464180569185475) internal successors, (1372), 1019 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:43,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1372 transitions. [2022-11-20 21:19:43,889 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1372 transitions. Word has length 36 [2022-11-20 21:19:43,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:19:43,889 INFO L495 AbstractCegarLoop]: Abstraction has 1020 states and 1372 transitions. [2022-11-20 21:19:43,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:43,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1372 transitions. [2022-11-20 21:19:43,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 21:19:43,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:19:43,892 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:19:43,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 21:19:44,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:44,098 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:19:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:19:44,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1632860709, now seen corresponding path program 9 times [2022-11-20 21:19:44,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:19:44,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389298838] [2022-11-20 21:19:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:19:44,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:19:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:19:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 21:19:44,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:19:44,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389298838] [2022-11-20 21:19:44,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389298838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:19:44,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777560023] [2022-11-20 21:19:44,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:19:44,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:19:44,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:19:44,500 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:19:44,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 21:19:44,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:19:44,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:19:44,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-20 21:19:44,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:19:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 21:19:44,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:19:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 21:19:45,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777560023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:19:45,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1287076847] [2022-11-20 21:19:45,640 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:19:45,640 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:19:45,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:19:45,641 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:19:45,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:19:45,744 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:19:46,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '67166#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:19:46,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:19:46,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:19:46,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 47 [2022-11-20 21:19:46,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745863898] [2022-11-20 21:19:46,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:19:46,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 21:19:46,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:19:46,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 21:19:46,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=2330, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 21:19:46,075 INFO L87 Difference]: Start difference. First operand 1020 states and 1372 transitions. Second operand has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:19:50,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 21:20:47,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:47,056 INFO L93 Difference]: Finished difference Result 2301 states and 3127 transitions. [2022-11-20 21:20:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2022-11-20 21:20:47,056 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-20 21:20:47,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:47,064 INFO L225 Difference]: With dead ends: 2301 [2022-11-20 21:20:47,064 INFO L226 Difference]: Without dead ends: 1997 [2022-11-20 21:20:47,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27124 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=8079, Invalid=64551, Unknown=0, NotChecked=0, Total=72630 [2022-11-20 21:20:47,067 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1289 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 4351 mSolverCounterSat, 1475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 5826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1475 IncrementalHoareTripleChecker+Valid, 4351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:47,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1289 Valid, 113 Invalid, 5826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1475 Valid, 4351 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2022-11-20 21:20:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2022-11-20 21:20:48,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1490. [2022-11-20 21:20:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 1.3767629281396911) internal successors, (2050), 1489 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:48,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 2050 transitions. [2022-11-20 21:20:48,803 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 2050 transitions. Word has length 36 [2022-11-20 21:20:48,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:48,803 INFO L495 AbstractCegarLoop]: Abstraction has 1490 states and 2050 transitions. [2022-11-20 21:20:48,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:48,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 2050 transitions. [2022-11-20 21:20:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 21:20:48,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:48,806 INFO L195 NwaCegarLoop]: trace histogram [15, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:48,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-20 21:20:49,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 21:20:49,012 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:20:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:49,012 INFO L85 PathProgramCache]: Analyzing trace with hash 544462888, now seen corresponding path program 5 times [2022-11-20 21:20:49,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:49,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535200927] [2022-11-20 21:20:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:49,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:20:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 21:20:49,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:20:49,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535200927] [2022-11-20 21:20:49,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535200927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:20:49,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142162772] [2022-11-20 21:20:49,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:20:49,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:49,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:20:49,501 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:20:49,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 21:20:49,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 21:20:49,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:20:49,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:20:49,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:20:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-20 21:20:49,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:20:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-20 21:20:50,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142162772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:20:50,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176451909] [2022-11-20 21:20:50,011 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:20:50,011 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:20:50,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:20:50,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:20:50,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:20:50,126 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:20:50,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75436#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:20:50,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:20:50,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:20:50,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10, 10] total 35 [2022-11-20 21:20:50,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960976227] [2022-11-20 21:20:50,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:20:50,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 21:20:50,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:20:50,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 21:20:50,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 21:20:50,366 INFO L87 Difference]: Start difference. First operand 1490 states and 2050 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:20:57,817 INFO L93 Difference]: Finished difference Result 2411 states and 3480 transitions. [2022-11-20 21:20:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-20 21:20:57,818 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-20 21:20:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:20:57,828 INFO L225 Difference]: With dead ends: 2411 [2022-11-20 21:20:57,828 INFO L226 Difference]: Without dead ends: 1898 [2022-11-20 21:20:57,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1545, Invalid=9585, Unknown=0, NotChecked=0, Total=11130 [2022-11-20 21:20:57,829 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 568 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 3672 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 4023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 3672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:20:57,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 257 Invalid, 4023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 3672 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 21:20:57,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2022-11-20 21:20:59,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1447. [2022-11-20 21:20:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1446 states have (on average 1.3727524204702628) internal successors, (1985), 1446 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 1985 transitions. [2022-11-20 21:20:59,521 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 1985 transitions. Word has length 38 [2022-11-20 21:20:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:20:59,521 INFO L495 AbstractCegarLoop]: Abstraction has 1447 states and 1985 transitions. [2022-11-20 21:20:59,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:20:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 1985 transitions. [2022-11-20 21:20:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 21:20:59,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:20:59,523 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:20:59,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-20 21:20:59,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:20:59,731 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:20:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:20:59,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1077215819, now seen corresponding path program 10 times [2022-11-20 21:20:59,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:20:59,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278563179] [2022-11-20 21:20:59,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:20:59,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:20:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:21:00,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:21:00,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278563179] [2022-11-20 21:21:00,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278563179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:21:00,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164044238] [2022-11-20 21:21:00,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:21:00,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:21:00,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:21:00,298 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:21:00,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 21:21:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:21:00,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 21:21:00,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:21:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 21:21:00,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:21:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 21:21:00,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164044238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:21:00,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [452075417] [2022-11-20 21:21:00,791 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:21:00,791 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:21:00,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:21:00,792 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:21:00,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:21:00,890 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:21:01,200 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83533#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:21:01,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:21:01,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:21:01,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 33 [2022-11-20 21:21:01,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563116281] [2022-11-20 21:21:01,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:21:01,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 21:21:01,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:21:01,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 21:21:01,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1393, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 21:21:01,202 INFO L87 Difference]: Start difference. First operand 1447 states and 1985 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:56,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:56,052 INFO L93 Difference]: Finished difference Result 4721 states and 6038 transitions. [2022-11-20 21:25:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 640 states. [2022-11-20 21:25:56,053 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-20 21:25:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:56,066 INFO L225 Difference]: With dead ends: 4721 [2022-11-20 21:25:56,067 INFO L226 Difference]: Without dead ends: 4527 [2022-11-20 21:25:56,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 663 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200857 ImplicationChecksByTransitivity, 242.7s TimeCoverageRelationStatistics Valid=16268, Invalid=425292, Unknown=0, NotChecked=0, Total=441560 [2022-11-20 21:25:56,090 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1726 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 8593 mSolverCounterSat, 2230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 10823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2230 IncrementalHoareTripleChecker+Valid, 8593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:56,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1726 Valid, 870 Invalid, 10823 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2230 Valid, 8593 Invalid, 0 Unknown, 0 Unchecked, 36.4s Time] [2022-11-20 21:25:56,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2022-11-20 21:25:58,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 1513. [2022-11-20 21:25:58,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 1.3591269841269842) internal successors, (2055), 1512 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2055 transitions. [2022-11-20 21:25:58,455 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2055 transitions. Word has length 38 [2022-11-20 21:25:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:58,456 INFO L495 AbstractCegarLoop]: Abstraction has 1513 states and 2055 transitions. [2022-11-20 21:25:58,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2055 transitions. [2022-11-20 21:25:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 21:25:58,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:58,458 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:58,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:58,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:58,664 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:25:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:58,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2002662716, now seen corresponding path program 10 times [2022-11-20 21:25:58,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:25:58,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016173794] [2022-11-20 21:25:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:58,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:25:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 21:25:59,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:25:59,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016173794] [2022-11-20 21:25:59,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016173794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:25:59,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115060850] [2022-11-20 21:25:59,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 21:25:59,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:59,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:59,013 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:59,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 21:25:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:59,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 21:25:59,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:25:59,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 21:25:59,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115060850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:59,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186770826] [2022-11-20 21:25:59,186 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:25:59,187 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:25:59,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:25:59,187 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:25:59,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:25:59,281 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:25:59,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '97138#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:25:59,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:25:59,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:25:59,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-11-20 21:25:59,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723706290] [2022-11-20 21:25:59,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:59,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 21:25:59,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:25:59,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 21:25:59,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-20 21:25:59,411 INFO L87 Difference]: Start difference. First operand 1513 states and 2055 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:26:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:26:04,857 INFO L93 Difference]: Finished difference Result 2561 states and 3377 transitions. [2022-11-20 21:26:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:26:04,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-20 21:26:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:26:04,863 INFO L225 Difference]: With dead ends: 2561 [2022-11-20 21:26:04,864 INFO L226 Difference]: Without dead ends: 2169 [2022-11-20 21:26:04,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-20 21:26:04,865 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:26:04,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 89 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:26:04,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2022-11-20 21:26:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1535. [2022-11-20 21:26:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 1.3611473272490222) internal successors, (2088), 1534 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:26:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2088 transitions. [2022-11-20 21:26:07,346 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2088 transitions. Word has length 39 [2022-11-20 21:26:07,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:26:07,347 INFO L495 AbstractCegarLoop]: Abstraction has 1535 states and 2088 transitions. [2022-11-20 21:26:07,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:26:07,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2088 transitions. [2022-11-20 21:26:07,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 21:26:07,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:26:07,349 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:26:07,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-20 21:26:07,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 21:26:07,554 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:26:07,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:26:07,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1053555917, now seen corresponding path program 6 times [2022-11-20 21:26:07,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:26:07,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38724821] [2022-11-20 21:26:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:26:07,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:26:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:26:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 21:26:08,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:26:08,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38724821] [2022-11-20 21:26:08,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38724821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:26:08,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281795362] [2022-11-20 21:26:08,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:26:08,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:26:08,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:26:08,094 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:26:08,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 21:26:08,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:26:08,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:26:08,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 21:26:08,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:26:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 21:26:08,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:26:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-20 21:26:08,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281795362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:26:08,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829001394] [2022-11-20 21:26:08,461 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:26:08,461 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:26:08,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:26:08,462 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:26:08,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:26:08,548 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:26:08,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '105579#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:26:08,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:26:08,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:26:08,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 7] total 29 [2022-11-20 21:26:08,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678809492] [2022-11-20 21:26:08,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:26:08,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 21:26:08,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:26:08,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 21:26:08,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 21:26:08,766 INFO L87 Difference]: Start difference. First operand 1535 states and 2088 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:26:15,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:26:15,837 INFO L93 Difference]: Finished difference Result 2736 states and 3973 transitions. [2022-11-20 21:26:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-20 21:26:15,843 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-20 21:26:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:26:15,847 INFO L225 Difference]: With dead ends: 2736 [2022-11-20 21:26:15,847 INFO L226 Difference]: Without dead ends: 2235 [2022-11-20 21:26:15,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=601, Invalid=2479, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 21:26:15,849 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 352 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 3137 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 3350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 3137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:26:15,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 449 Invalid, 3350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 3137 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 21:26:15,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2022-11-20 21:26:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1642. [2022-11-20 21:26:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 1.3491773308957953) internal successors, (2214), 1641 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:26:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2214 transitions. [2022-11-20 21:26:18,157 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2214 transitions. Word has length 41 [2022-11-20 21:26:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:26:18,158 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 2214 transitions. [2022-11-20 21:26:18,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:26:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2214 transitions. [2022-11-20 21:26:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 21:26:18,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:26:18,159 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:26:18,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 21:26:18,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 21:26:18,363 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:26:18,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:26:18,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1589633901, now seen corresponding path program 11 times [2022-11-20 21:26:18,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:26:18,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689561688] [2022-11-20 21:26:18,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:26:18,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:26:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:26:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:26:19,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:26:19,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689561688] [2022-11-20 21:26:19,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689561688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:26:19,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682308415] [2022-11-20 21:26:19,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:26:19,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:26:19,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:26:19,017 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:26:19,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f870e1f-c7d9-4246-beea-63c157019e9f/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 21:26:19,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 21:26:19,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:26:19,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 21:26:19,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:26:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 21:26:19,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:26:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-20 21:26:19,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682308415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:26:19,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [156843792] [2022-11-20 21:26:19,742 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 21:26:19,743 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:26:19,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:26:19,743 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:26:19,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:26:19,827 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:26:20,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '114650#(and (not (< 0 (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:26:20,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:26:20,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:26:20,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 36 [2022-11-20 21:26:20,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165196074] [2022-11-20 21:26:20,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:26:20,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 21:26:20,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:26:20,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 21:26:20,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1627, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 21:26:20,169 INFO L87 Difference]: Start difference. First operand 1642 states and 2214 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:30:48,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []