./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/vnew1.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_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/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_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/vnew1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/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_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/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 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 --- 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 20:38:48,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:38:48,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:38:48,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:38:48,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:38:48,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:38:48,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:38:48,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:38:48,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:38:48,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:38:48,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:38:48,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:38:48,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:38:48,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:38:48,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:38:48,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:38:48,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:38:48,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:38:48,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:38:48,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:38:48,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:38:48,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:38:48,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:38:48,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:38:48,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:38:48,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:38:48,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:38:48,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:38:48,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:38:48,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:38:48,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:38:48,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:38:48,659 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:38:48,660 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:38:48,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:38:48,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:38:48,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:38:48,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:38:48,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:38:48,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:38:48,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:38:48,667 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:38:48,689 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:38:48,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:38:48,690 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:38:48,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:38:48,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:38:48,691 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:38:48,691 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:38:48,692 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:38:48,692 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:38:48,692 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:38:48,692 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:38:48,704 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:38:48,705 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:38:48,705 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:38:48,705 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:38:48,706 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:38:48,706 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:38:48,706 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:38:48,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:38:48,707 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:38:48,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:38:48,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:38:48,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:38:48,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:38:48,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:38:48,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:38:48,709 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:38:48,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:38:48,710 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:38:48,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:38:48,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:38:48,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:38:48,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:38:48,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:38:48,712 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:38:48,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:38:48,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:38:48,712 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:38:48,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:38:48,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:38:48,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:38:48,713 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_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 [2022-11-20 20:38:48,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:38:48,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:38:49,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:38:49,002 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:38:49,004 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:38:49,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/loops-crafted-1/vnew1.c [2022-11-20 20:38:52,020 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:38:52,239 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:38:52,239 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/sv-benchmarks/c/loops-crafted-1/vnew1.c [2022-11-20 20:38:52,248 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/data/5ea1dee56/8b670714b0294f1387c7069a387cec21/FLAG2e49099d2 [2022-11-20 20:38:52,269 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/data/5ea1dee56/8b670714b0294f1387c7069a387cec21 [2022-11-20 20:38:52,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:38:52,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:38:52,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:38:52,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:38:52,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:38:52,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:38:52" (1/1) ... [2022-11-20 20:38:52,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@486c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52, skipping insertion in model container [2022-11-20 20:38:52,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:38:52" (1/1) ... [2022-11-20 20:38:52,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:38:52,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:38:52,460 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_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2022-11-20 20:38:52,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:38:52,484 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:38:52,495 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_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2022-11-20 20:38:52,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:38:52,512 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:38:52,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52 WrapperNode [2022-11-20 20:38:52,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:38:52,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:38:52,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:38:52,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:38:52,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52" (1/1) ... [2022-11-20 20:38:52,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52" (1/1) ... [2022-11-20 20:38:52,548 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2022-11-20 20:38:52,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:38:52,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:38:52,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:38:52,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:38:52,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52" (1/1) ... [2022-11-20 20:38:52,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52" (1/1) ... [2022-11-20 20:38:52,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52" (1/1) ... [2022-11-20 20:38:52,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52" (1/1) ... [2022-11-20 20:38:52,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52" (1/1) ... [2022-11-20 20:38:52,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52" (1/1) ... [2022-11-20 20:38:52,567 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52" (1/1) ... [2022-11-20 20:38:52,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52" (1/1) ... [2022-11-20 20:38:52,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:38:52,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:38:52,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:38:52,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:38:52,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52" (1/1) ... [2022-11-20 20:38:52,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:38:52,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:38:52,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:38:52,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:38:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:38:52,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:38:52,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:38:52,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:38:52,719 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:38:52,721 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:38:52,848 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:38:52,879 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:38:52,879 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 20:38:52,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:38:52 BoogieIcfgContainer [2022-11-20 20:38:52,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:38:52,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:38:52,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:38:52,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:38:52,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:38:52" (1/3) ... [2022-11-20 20:38:52,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d91ea1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:38:52, skipping insertion in model container [2022-11-20 20:38:52,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:38:52" (2/3) ... [2022-11-20 20:38:52,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d91ea1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:38:52, skipping insertion in model container [2022-11-20 20:38:52,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:38:52" (3/3) ... [2022-11-20 20:38:52,890 INFO L112 eAbstractionObserver]: Analyzing ICFG vnew1.c [2022-11-20 20:38:52,912 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:38:52,913 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:38:52,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:38:53,006 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;@c69055d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:38:53,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:38:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 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 20:38:53,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:38:53,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:38:53,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:38:53,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:38:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:38:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2025251484, now seen corresponding path program 1 times [2022-11-20 20:38:53,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:38:53,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171590331] [2022-11-20 20:38:53,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:53,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:38:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:38:53,948 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 20:38:53,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:38:53,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171590331] [2022-11-20 20:38:53,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171590331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:38:53,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:38:53,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:38:53,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903249022] [2022-11-20 20:38:53,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:38:53,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:38:53,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:38:54,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:38:54,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:38:54,011 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 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) Second operand has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 20:38:54,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:38:54,241 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-11-20 20:38:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:38:54,243 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 6 [2022-11-20 20:38:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:38:54,250 INFO L225 Difference]: With dead ends: 26 [2022-11-20 20:38:54,251 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 20:38:54,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:38:54,257 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:38:54,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 10 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:38:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 20:38:54,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2022-11-20 20:38:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 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 20:38:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-20 20:38:54,311 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 6 [2022-11-20 20:38:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:38:54,312 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-20 20:38:54,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 20:38:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-20 20:38:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:38:54,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:38:54,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:38:54,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:38:54,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:38:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:38:54,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1610042692, now seen corresponding path program 1 times [2022-11-20 20:38:54,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:38:54,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696198028] [2022-11-20 20:38:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:54,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:38:54,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:38:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:54,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:38:54,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696198028] [2022-11-20 20:38:54,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696198028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:38:54,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349160904] [2022-11-20 20:38:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:54,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:54,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:38:54,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:38:54,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:38:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:38:54,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:38:54,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:38:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:55,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:38:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:38:56,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349160904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:38:56,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1637140464] [2022-11-20 20:38:56,028 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:38:56,028 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:38:56,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:38:56,038 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:38:56,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:38:56,241 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:38:56,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '130#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:38:56,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:38:56,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:38:56,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 20:38:56,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006777626] [2022-11-20 20:38:56,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:38:56,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:38:56,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:38:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:38:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-11-20 20:38:56,538 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 20:38:57,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:38:57,210 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-11-20 20:38:57,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 20:38:57,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:38:57,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:38:57,212 INFO L225 Difference]: With dead ends: 30 [2022-11-20 20:38:57,212 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 20:38:57,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-11-20 20:38:57,214 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:38:57,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 20 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:38:57,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 20:38:57,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 17. [2022-11-20 20:38:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:38:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-20 20:38:57,231 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 7 [2022-11-20 20:38:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:38:57,231 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-20 20:38:57,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 20:38:57,232 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-20 20:38:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:38:57,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:38:57,233 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-20 20:38:57,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 20:38:57,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:57,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:38:57,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:38:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1497765220, now seen corresponding path program 2 times [2022-11-20 20:38:57,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:38:57,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071719838] [2022-11-20 20:38:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:38:57,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:38:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:38:57,718 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 20:38:57,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:38:57,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071719838] [2022-11-20 20:38:57,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071719838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:38:57,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402733255] [2022-11-20 20:38:57,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:38:57,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:38:57,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:38:57,726 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:38:57,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:38:57,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:38:57,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:38:57,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 20:38:57,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:38:58,022 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 20:38:58,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:38:58,262 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 20:38:58,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402733255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:38:58,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1466146813] [2022-11-20 20:38:58,270 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:38:58,271 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:38:58,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:38:58,271 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:38:58,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:38:58,376 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:38:58,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '299#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:38:58,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:38:58,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:38:58,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-11-20 20:38:58,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889347780] [2022-11-20 20:38:58,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:38:58,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 20:38:58,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:38:58,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 20:38:58,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-11-20 20:38:58,757 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 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 20:39:02,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:39:02,926 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-11-20 20:39:02,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 20:39:02,926 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 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 10 [2022-11-20 20:39:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:39:02,928 INFO L225 Difference]: With dead ends: 68 [2022-11-20 20:39:02,928 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 20:39:02,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=579, Invalid=2391, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 20:39:02,931 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 210 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:39:02,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 39 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 20:39:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 20:39:02,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 24. [2022-11-20 20:39:02,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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 20:39:02,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 36 transitions. [2022-11-20 20:39:02,952 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 36 transitions. Word has length 10 [2022-11-20 20:39:02,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:39:02,952 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 36 transitions. [2022-11-20 20:39:02,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 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 20:39:02,953 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 36 transitions. [2022-11-20 20:39:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:39:02,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:39:02,953 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:39:02,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:39:03,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:39:03,165 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:39:03,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:39:03,165 INFO L85 PathProgramCache]: Analyzing trace with hash 543513786, now seen corresponding path program 1 times [2022-11-20 20:39:03,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:39:03,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997911471] [2022-11-20 20:39:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:39:03,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:39:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:39:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:03,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:39:03,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997911471] [2022-11-20 20:39:03,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997911471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:39:03,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470985082] [2022-11-20 20:39:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:39:03,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:39:03,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:39:03,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:39:03,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:39:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:39:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 20:39:03,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:39:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:04,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:39:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:04,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470985082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:39:04,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1037767408] [2022-11-20 20:39:04,417 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 20:39:04,417 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:39:04,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:39:04,418 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:39:04,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:39:04,553 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:39:04,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '599#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:39:04,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:39:04,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:39:04,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-20 20:39:04,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804427063] [2022-11-20 20:39:04,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:39:04,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 20:39:04,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:39:04,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 20:39:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-11-20 20:39:04,987 INFO L87 Difference]: Start difference. First operand 24 states and 36 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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 20:39:10,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:39:10,333 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2022-11-20 20:39:10,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 20:39:10,334 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:39:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:39:10,335 INFO L225 Difference]: With dead ends: 73 [2022-11-20 20:39:10,335 INFO L226 Difference]: Without dead ends: 71 [2022-11-20 20:39:10,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=724, Invalid=3566, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 20:39:10,338 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 194 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:39:10,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 65 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 20:39:10,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-20 20:39:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 27. [2022-11-20 20:39:10,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:39:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2022-11-20 20:39:10,364 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 11 [2022-11-20 20:39:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:39:10,364 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2022-11-20 20:39:10,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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 20:39:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2022-11-20 20:39:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:39:10,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:39:10,366 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:39:10,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:39:10,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:39:10,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:39:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:39:10,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1573086394, now seen corresponding path program 2 times [2022-11-20 20:39:10,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:39:10,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588906634] [2022-11-20 20:39:10,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:39:10,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:39:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:39:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:11,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:39:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588906634] [2022-11-20 20:39:11,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588906634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:39:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367152969] [2022-11-20 20:39:11,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:39:11,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:39:11,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:39:11,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:39:11,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:39:11,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:39:11,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:39:11,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 20:39:11,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:39:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:11,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:39:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:12,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367152969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:39:12,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [982668977] [2022-11-20 20:39:12,789 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 20:39:12,789 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:39:12,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:39:12,790 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:39:12,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:39:12,902 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:39:13,397 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '959#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:39:13,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:39:13,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:39:13,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-11-20 20:39:13,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614162669] [2022-11-20 20:39:13,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:39:13,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 20:39:13,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:39:13,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 20:39:13,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:39:13,400 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 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 20:39:28,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:39:28,643 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2022-11-20 20:39:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 20:39:28,643 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 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 20:39:28,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:39:28,644 INFO L225 Difference]: With dead ends: 116 [2022-11-20 20:39:28,645 INFO L226 Difference]: Without dead ends: 114 [2022-11-20 20:39:28,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1435, Invalid=6047, Unknown=0, NotChecked=0, Total=7482 [2022-11-20 20:39:28,648 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 413 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:39:28,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 69 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-20 20:39:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-20 20:39:28,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 38. [2022-11-20 20:39:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 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 20:39:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 57 transitions. [2022-11-20 20:39:28,687 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 57 transitions. Word has length 15 [2022-11-20 20:39:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:39:28,687 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 57 transitions. [2022-11-20 20:39:28,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 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 20:39:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 57 transitions. [2022-11-20 20:39:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:39:28,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:39:28,689 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-20 20:39:28,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:39:28,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:39:28,894 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:39:28,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:39:28,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1965317756, now seen corresponding path program 3 times [2022-11-20 20:39:28,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:39:28,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521439438] [2022-11-20 20:39:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:39:28,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:39:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:39:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:29,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:39:29,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521439438] [2022-11-20 20:39:29,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521439438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:39:29,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315529132] [2022-11-20 20:39:29,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:39:29,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:39:29,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:39:29,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:39:29,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:39:29,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:39:29,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:39:29,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 20:39:29,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:39:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:30,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:39:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:34,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315529132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:39:34,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [453225840] [2022-11-20 20:39:34,073 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 20:39:34,073 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:39:34,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:39:34,073 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:39:34,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:39:34,205 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:39:34,830 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1433#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:39:34,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:39:34,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:39:34,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2022-11-20 20:39:34,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280460028] [2022-11-20 20:39:34,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:39:34,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 20:39:34,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:39:34,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 20:39:34,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1051, Unknown=1, NotChecked=0, Total=1260 [2022-11-20 20:39:34,833 INFO L87 Difference]: Start difference. First operand 38 states and 57 transitions. Second operand has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 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 20:39:47,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:39:47,124 INFO L93 Difference]: Finished difference Result 116 states and 140 transitions. [2022-11-20 20:39:47,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 20:39:47,125 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 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 20:39:47,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:39:47,126 INFO L225 Difference]: With dead ends: 116 [2022-11-20 20:39:47,127 INFO L226 Difference]: Without dead ends: 114 [2022-11-20 20:39:47,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=1044, Invalid=4961, Unknown=1, NotChecked=0, Total=6006 [2022-11-20 20:39:47,129 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 208 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:39:47,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 39 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-20 20:39:47,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-20 20:39:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 44. [2022-11-20 20:39:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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 20:39:47,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2022-11-20 20:39:47,178 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 15 [2022-11-20 20:39:47,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:39:47,179 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2022-11-20 20:39:47,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 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 20:39:47,179 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2022-11-20 20:39:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 20:39:47,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:39:47,180 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2022-11-20 20:39:47,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:39:47,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:39:47,386 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:39:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:39:47,386 INFO L85 PathProgramCache]: Analyzing trace with hash -712243868, now seen corresponding path program 3 times [2022-11-20 20:39:47,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:39:47,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240934344] [2022-11-20 20:39:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:39:47,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:39:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:39:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:48,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:39:48,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240934344] [2022-11-20 20:39:48,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240934344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:39:48,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645502012] [2022-11-20 20:39:48,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:39:48,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:39:48,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:39:48,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:39:48,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:39:48,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:39:48,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:39:48,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 20:39:48,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:39:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:48,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:39:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:39:49,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645502012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:39:49,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1752649026] [2022-11-20 20:39:49,913 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-20 20:39:49,913 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:39:49,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:39:49,914 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:39:49,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:39:49,996 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:39:50,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1942#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:39:50,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:39:50,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:39:50,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-11-20 20:39:50,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002341333] [2022-11-20 20:39:50,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:39:50,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 20:39:50,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:39:50,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 20:39:50,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2007, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 20:39:50,521 INFO L87 Difference]: Start difference. First operand 44 states and 63 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 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 20:40:34,036 WARN L233 SmtUtils]: Spent 6.80s on a formula simplification that was a NOOP. DAG size: 130 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:40:46,517 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:41:07,416 WARN L233 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:41:51,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:41:51,497 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2022-11-20 20:41:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-20 20:41:51,498 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 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 20:41:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:41:51,499 INFO L225 Difference]: With dead ends: 155 [2022-11-20 20:41:51,499 INFO L226 Difference]: Without dead ends: 153 [2022-11-20 20:41:51,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3639 ImplicationChecksByTransitivity, 112.9s TimeCoverageRelationStatistics Valid=2400, Invalid=10031, Unknown=1, NotChecked=0, Total=12432 [2022-11-20 20:41:51,504 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 678 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:41:51,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 84 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-11-20 20:41:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-20 20:41:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 52. [2022-11-20 20:41:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 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 20:41:51,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2022-11-20 20:41:51,563 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 18 [2022-11-20 20:41:51,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:41:51,564 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2022-11-20 20:41:51,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 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 20:41:51,564 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2022-11-20 20:41:51,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 20:41:51,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:41:51,565 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1] [2022-11-20 20:41:51,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:41:51,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 20:41:51,766 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:41:51,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:41:51,766 INFO L85 PathProgramCache]: Analyzing trace with hash 293585018, now seen corresponding path program 4 times [2022-11-20 20:41:51,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:41:51,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684021204] [2022-11-20 20:41:51,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:41:51,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:41:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:52,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:41:52,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684021204] [2022-11-20 20:41:52,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684021204] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:41:52,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919956045] [2022-11-20 20:41:52,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:41:52,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:41:52,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:41:52,791 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:41:52,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:41:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:41:52,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 20:41:52,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:41:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:53,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:41:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:41:56,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919956045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:41:56,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749653722] [2022-11-20 20:41:56,303 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 20:41:56,303 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:41:56,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:41:56,304 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:41:56,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:41:56,425 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:41:57,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2571#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:41:57,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:41:57,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:41:57,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 36 [2022-11-20 20:41:57,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543393722] [2022-11-20 20:41:57,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:41:57,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 20:41:57,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:41:57,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 20:41:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 20:41:57,045 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 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 20:42:28,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:42:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:42:28,536 INFO L93 Difference]: Finished difference Result 170 states and 204 transitions. [2022-11-20 20:42:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-20 20:42:28,536 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 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 20:42:28,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:42:28,537 INFO L225 Difference]: With dead ends: 170 [2022-11-20 20:42:28,537 INFO L226 Difference]: Without dead ends: 168 [2022-11-20 20:42:28,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3778 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=2221, Invalid=10889, Unknown=0, NotChecked=0, Total=13110 [2022-11-20 20:42:28,540 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 252 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:42:28,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 95 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-20 20:42:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-20 20:42:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 67. [2022-11-20 20:42:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 66 states have internal predecessors, (95), 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 20:42:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 95 transitions. [2022-11-20 20:42:28,653 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 95 transitions. Word has length 19 [2022-11-20 20:42:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:42:28,654 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 95 transitions. [2022-11-20 20:42:28,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 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 20:42:28,656 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 95 transitions. [2022-11-20 20:42:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 20:42:28,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:42:28,662 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-20 20:42:28,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:42:28,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:42:28,863 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:42:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:42:28,863 INFO L85 PathProgramCache]: Analyzing trace with hash -71745116, now seen corresponding path program 5 times [2022-11-20 20:42:28,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:42:28,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600771090] [2022-11-20 20:42:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:42:28,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:42:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:42:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:29,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:42:29,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600771090] [2022-11-20 20:42:29,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600771090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:42:29,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748230442] [2022-11-20 20:42:29,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:42:29,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:42:29,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:42:29,918 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:42:29,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 20:42:30,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:42:30,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:42:30,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-20 20:42:30,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:42:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:31,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:42:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:42:34,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748230442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:42:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [779660400] [2022-11-20 20:42:34,449 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 20:42:34,449 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:42:34,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:42:34,449 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:42:34,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:42:34,539 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:42:35,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3302#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:42:35,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:42:35,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:42:35,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 48 [2022-11-20 20:42:35,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205814817] [2022-11-20 20:42:35,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:42:35,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 20:42:35,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:42:35,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 20:42:35,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=2500, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 20:42:35,336 INFO L87 Difference]: Start difference. First operand 67 states and 95 transitions. Second operand has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 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 20:42:43,035 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296))) (let ((.cse3 (* (div |c_ULTIMATE.start_main_~n~0#1| 4294967296) 4294967296)) (.cse2 (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse1 (< (mod (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) .cse0))) (and (not (<= (+ (div c_~SIZE~0 4294967296) 1) 0)) (or (< 0 (mod (+ 4294967292 |c_ULTIMATE.start_main_~k~0#1|) 4294967296)) (< (mod (+ 6 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) .cse0)) (<= c_~SIZE~0 20000001) (or (< 0 (mod (+ 4294967289 |c_ULTIMATE.start_main_~k~0#1|) 4294967296)) (not .cse1) (< (mod (+ 15 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) .cse0)) (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 1) (<= .cse2 (+ .cse3 20000003)) (or (not (< (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) .cse0)) (< 0 (mod (+ 4294967290 |c_ULTIMATE.start_main_~k~0#1|) 4294967296)) (< (mod (+ 12 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) .cse0)) (<= |c_ULTIMATE.start_main_~i~0#1| (+ 3 .cse3 (* 4294967296 (div (+ |c_ULTIMATE.start_main_~i~0#1| (- |c_ULTIMATE.start_main_~n~0#1|) 19999998) 4294967296)))) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~k~0#1|) 4294967296)) (= 3 |c_ULTIMATE.start_main_~i~0#1|) (or (< (mod (+ 9 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) .cse0) (< 0 (mod (+ 4294967291 |c_ULTIMATE.start_main_~k~0#1|) 4294967296))) (< 0 (mod |c_ULTIMATE.start_main_~k~0#1| 4294967296)) (<= (+ |c_ULTIMATE.start_main_~n~0#1| 2) .cse2) (or (< 0 (mod (+ 4294967293 |c_ULTIMATE.start_main_~k~0#1|) 4294967296)) .cse1) (= |c_ULTIMATE.start_main_~n~0#1| (+ |c_ULTIMATE.start_main_~k~0#1| 1))))) is different from false [2022-11-20 20:43:19,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:43:26,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:43:28,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:43:42,763 WARN L233 SmtUtils]: Spent 6.49s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:43:53,331 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:43:55,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:44:08,237 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:44:21,017 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:44:46,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:44:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:44:55,673 INFO L93 Difference]: Finished difference Result 283 states and 319 transitions. [2022-11-20 20:44:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-20 20:44:55,674 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 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 22 [2022-11-20 20:44:55,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:44:55,675 INFO L225 Difference]: With dead ends: 283 [2022-11-20 20:44:55,675 INFO L226 Difference]: Without dead ends: 281 [2022-11-20 20:44:55,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5262 ImplicationChecksByTransitivity, 117.9s TimeCoverageRelationStatistics Valid=3510, Invalid=16799, Unknown=1, NotChecked=282, Total=20592 [2022-11-20 20:44:55,681 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 786 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 315 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 26.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:44:55,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 94 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1615 Invalid, 1 Unknown, 1 Unchecked, 26.8s Time] [2022-11-20 20:44:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-20 20:44:55,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 72. [2022-11-20 20:44:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.4225352112676057) internal successors, (101), 71 states have internal predecessors, (101), 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 20:44:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2022-11-20 20:44:55,800 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 22 [2022-11-20 20:44:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:44:55,801 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2022-11-20 20:44:55,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 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 20:44:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2022-11-20 20:44:55,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 20:44:55,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:44:55,802 INFO L195 NwaCegarLoop]: trace histogram [17, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:44:55,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:44:56,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:44:56,003 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:44:56,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:44:56,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1213334310, now seen corresponding path program 6 times [2022-11-20 20:44:56,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:44:56,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018212947] [2022-11-20 20:44:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:44:56,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:44:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:44:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:57,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:44:57,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018212947] [2022-11-20 20:44:57,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018212947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:44:57,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782725484] [2022-11-20 20:44:57,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:44:57,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:44:57,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:44:57,888 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:44:57,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:44:58,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:44:58,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:44:58,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-20 20:44:58,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:44:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:44:59,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:45:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:45:03,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782725484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:45:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843019711] [2022-11-20 20:45:03,019 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 20:45:03,019 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:45:03,020 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:45:03,020 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:45:03,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:45:03,126 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:45:04,057 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4300#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:45:04,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:45:04,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:45:04,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 64 [2022-11-20 20:45:04,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586677098] [2022-11-20 20:45:04,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:45:04,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-20 20:45:04,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:45:04,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-20 20:45:04,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 20:45:04,060 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand has 64 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 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 20:45:47,252 WARN L233 SmtUtils]: Spent 22.98s on a formula simplification that was a NOOP. DAG size: 173 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:46:42,447 WARN L233 SmtUtils]: Spent 30.70s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:46:43,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:46,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:46:49,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:47:57,179 WARN L233 SmtUtils]: Spent 39.44s on a formula simplification that was a NOOP. DAG size: 187 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:48:00,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:48:04,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:48:07,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:50:03,372 WARN L233 SmtUtils]: Spent 1.21m on a formula simplification that was a NOOP. DAG size: 192 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:50:10,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:50:12,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:50:15,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:50:18,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:50:20,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:50:24,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:50:28,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:50:31,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:50:35,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:50:37,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:50:39,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:52:18,794 WARN L233 SmtUtils]: Spent 57.62s on a formula simplification that was a NOOP. DAG size: 191 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:52:22,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:52:24,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:52:26,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:52:26,183 INFO L93 Difference]: Finished difference Result 177 states and 209 transitions. [2022-11-20 20:52:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 20:52:26,185 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 20:52:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:52:26,186 INFO L225 Difference]: With dead ends: 177 [2022-11-20 20:52:26,186 INFO L226 Difference]: Without dead ends: 175 [2022-11-20 20:52:26,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 377.0s TimeCoverageRelationStatistics Valid=2189, Invalid=12081, Unknown=10, NotChecked=0, Total=14280 [2022-11-20 20:52:26,188 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 599 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3528 mSolverCounterSat, 426 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 3962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 3528 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:52:26,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 72 Invalid, 3962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 3528 Invalid, 8 Unknown, 0 Unchecked, 70.7s Time] [2022-11-20 20:52:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-20 20:52:26,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 57. [2022-11-20 20:52:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 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 20:52:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2022-11-20 20:52:26,325 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 26 [2022-11-20 20:52:26,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:52:26,326 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2022-11-20 20:52:26,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 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 20:52:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2022-11-20 20:52:26,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 20:52:26,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:52:26,327 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1] [2022-11-20 20:52:26,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:52:26,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:52:26,530 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:52:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:52:26,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1627572732, now seen corresponding path program 7 times [2022-11-20 20:52:26,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:52:26,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100690788] [2022-11-20 20:52:26,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:52:26,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:52:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:52:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:52:28,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:52:28,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100690788] [2022-11-20 20:52:28,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100690788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:52:28,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472014886] [2022-11-20 20:52:28,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:52:28,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:52:28,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:52:28,362 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:52:28,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c84528d-0774-4ad1-aaa9-bc2329c78ca4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:52:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:52:28,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 20:52:28,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:52:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:52:29,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:52:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:52:34,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472014886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:52:34,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247934292] [2022-11-20 20:52:34,845 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-20 20:52:34,846 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:52:34,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:52:34,846 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:52:34,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:52:34,990 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:52:36,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5018#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:52:36,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:52:36,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:52:36,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 44 [2022-11-20 20:52:36,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901038752] [2022-11-20 20:52:36,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:52:36,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 20:52:36,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:52:36,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 20:52:36,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2244, Unknown=3, NotChecked=0, Total=2450 [2022-11-20 20:52:36,202 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 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 20:52:50,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:53:02,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:53:07,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:53:13,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:53:15,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []