./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/Mono6_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/Mono6_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7 --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 d34109ac38ddcd69eb693c43509c1355293ac88c80ebd192d8e2af9a8be8f805 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:52:07,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:52:07,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:52:07,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:52:07,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:52:07,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:52:07,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:52:07,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:52:07,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:52:07,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:52:07,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:52:07,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:52:07,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:52:07,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:52:07,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:52:07,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:52:07,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:52:07,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:52:07,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:52:07,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:52:07,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:52:07,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:52:07,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:52:07,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:52:07,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:52:07,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:52:07,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:52:07,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:52:07,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:52:07,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:52:07,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:52:07,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:52:07,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:52:07,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:52:07,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:52:07,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:52:07,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:52:07,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:52:07,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:52:07,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:52:07,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:52:07,317 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:52:07,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:52:07,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:52:07,366 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:52:07,366 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:52:07,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:52:07,373 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:52:07,374 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:52:07,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:52:07,374 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:52:07,374 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:52:07,374 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:52:07,374 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:52:07,375 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:52:07,375 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:52:07,375 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:52:07,375 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:52:07,376 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:52:07,376 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:52:07,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:52:07,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:52:07,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:52:07,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:52:07,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:52:07,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:52:07,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:52:07,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:52:07,378 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:52:07,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:52:07,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:52:07,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:52:07,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:52:07,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:52:07,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:52:07,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:52:07,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:52:07,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:52:07,380 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:52:07,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:52:07,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:52:07,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:52:07,381 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:52:07,381 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d34109ac38ddcd69eb693c43509c1355293ac88c80ebd192d8e2af9a8be8f805 [2021-11-25 17:52:07,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:52:07,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:52:07,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:52:07,643 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:52:07,644 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:52:07,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2021-11-25 17:52:07,730 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/data/e5ab102f1/ab27d6d8c6834dbf91af9bbfa438f0c5/FLAG8e25fc243 [2021-11-25 17:52:08,145 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:52:08,146 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2021-11-25 17:52:08,155 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/data/e5ab102f1/ab27d6d8c6834dbf91af9bbfa438f0c5/FLAG8e25fc243 [2021-11-25 17:52:08,549 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/data/e5ab102f1/ab27d6d8c6834dbf91af9bbfa438f0c5 [2021-11-25 17:52:08,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:52:08,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:52:08,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:52:08,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:52:08,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:52:08,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:52:08" (1/1) ... [2021-11-25 17:52:08,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b1fc04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:08, skipping insertion in model container [2021-11-25 17:52:08,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:52:08" (1/1) ... [2021-11-25 17:52:08,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:52:08,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:52:08,762 WARN L230 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_36337cd4-f767-4099-9627-fc1218b089e7/sv-benchmarks/c/loops-crafted-1/Mono6_1.c[311,324] [2021-11-25 17:52:08,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:52:08,782 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:52:08,794 WARN L230 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_36337cd4-f767-4099-9627-fc1218b089e7/sv-benchmarks/c/loops-crafted-1/Mono6_1.c[311,324] [2021-11-25 17:52:08,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:52:08,808 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:52:08,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:08 WrapperNode [2021-11-25 17:52:08,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:52:08,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:52:08,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:52:08,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:52:08,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:08" (1/1) ... [2021-11-25 17:52:08,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:08" (1/1) ... [2021-11-25 17:52:08,858 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2021-11-25 17:52:08,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:52:08,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:52:08,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:52:08,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:52:08,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:08" (1/1) ... [2021-11-25 17:52:08,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:08" (1/1) ... [2021-11-25 17:52:08,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:08" (1/1) ... [2021-11-25 17:52:08,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:08" (1/1) ... [2021-11-25 17:52:08,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:08" (1/1) ... [2021-11-25 17:52:08,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:08" (1/1) ... [2021-11-25 17:52:08,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:08" (1/1) ... [2021-11-25 17:52:08,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:52:08,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:52:08,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:52:08,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:52:08,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:08" (1/1) ... [2021-11-25 17:52:08,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:52:08,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:08,947 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:52:08,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:52:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:52:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:52:09,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:52:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:52:09,070 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:52:09,072 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:52:09,207 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:52:09,234 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:52:09,235 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 17:52:09,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:52:09 BoogieIcfgContainer [2021-11-25 17:52:09,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:52:09,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:52:09,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:52:09,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:52:09,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:52:08" (1/3) ... [2021-11-25 17:52:09,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe528eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:52:09, skipping insertion in model container [2021-11-25 17:52:09,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:08" (2/3) ... [2021-11-25 17:52:09,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe528eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:52:09, skipping insertion in model container [2021-11-25 17:52:09,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:52:09" (3/3) ... [2021-11-25 17:52:09,246 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2021-11-25 17:52:09,251 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:52:09,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:52:09,311 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:52:09,317 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 17:52:09,317 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:52:09,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 17:52:09,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:09,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 17:52:09,337 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:52:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:09,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2065030, now seen corresponding path program 1 times [2021-11-25 17:52:09,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:09,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454059987] [2021-11-25 17:52:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:09,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:09,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454059987] [2021-11-25 17:52:09,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454059987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:52:09,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:52:09,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 17:52:09,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4455841] [2021-11-25 17:52:09,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:52:09,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:52:09,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:09,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:52:09,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:52:09,615 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-25 17:52:09,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:09,643 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-25 17:52:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:52:09,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-25 17:52:09,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:09,653 INFO L225 Difference]: With dead ends: 13 [2021-11-25 17:52:09,653 INFO L226 Difference]: Without dead ends: 6 [2021-11-25 17:52:09,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:52:09,676 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:09,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:52:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-25 17:52:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-25 17:52:09,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) 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) [2021-11-25 17:52:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-25 17:52:09,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-25 17:52:09,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:09,722 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-25 17:52:09,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-25 17:52:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-25 17:52:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 17:52:09,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:09,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 17:52:09,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:52:09,726 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:52:09,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash 64119683, now seen corresponding path program 1 times [2021-11-25 17:52:09,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:09,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061271745] [2021-11-25 17:52:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:09,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:09,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:09,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061271745] [2021-11-25 17:52:09,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061271745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:52:09,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545794954] [2021-11-25 17:52:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:09,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:09,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:09,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:09,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:52:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:09,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 17:52:09,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:10,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:10,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545794954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:10,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1358308095] [2021-11-25 17:52:10,396 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 17:52:10,396 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:52:10,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:52:10,408 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:52:10,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:52:10,687 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:52:10,827 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71#(and (= |ULTIMATE.start_main_~y~0#1| 10000000) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 5000000 |ULTIMATE.start_main_~z~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 17:52:10,827 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:52:10,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:52:10,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 8 [2021-11-25 17:52:10,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439943072] [2021-11-25 17:52:10,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:10,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 17:52:10,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:10,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 17:52:10,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-25 17:52:10,831 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:10,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:10,973 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-25 17:52:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:52:10,975 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 17:52:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:10,976 INFO L225 Difference]: With dead ends: 13 [2021-11-25 17:52:10,976 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 17:52:10,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-25 17:52:10,979 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:10,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 17:52:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 17:52:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 17:52:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-25 17:52:10,991 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-25 17:52:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:10,991 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-25 17:52:10,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-25 17:52:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 17:52:10,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:10,993 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-25 17:52:11,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:11,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:11,207 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:52:11,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash -967943738, now seen corresponding path program 2 times [2021-11-25 17:52:11,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:11,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975053730] [2021-11-25 17:52:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:11,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:11,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:11,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975053730] [2021-11-25 17:52:11,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975053730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:52:11,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119692398] [2021-11-25 17:52:11,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:52:11,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:11,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:11,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:11,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 17:52:11,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 17:52:11,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:52:11,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 17:52:11,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:11,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:15,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119692398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:15,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [893823215] [2021-11-25 17:52:15,016 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 17:52:15,017 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:52:15,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:52:15,017 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:52:15,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:52:15,148 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:52:15,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '170#(and (= |ULTIMATE.start_main_~y~0#1| 10000000) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 5000000 |ULTIMATE.start_main_~z~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 17:52:15,371 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:52:15,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:52:15,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2021-11-25 17:52:15,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366266327] [2021-11-25 17:52:15,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:15,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 17:52:15,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:15,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 17:52:15,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-25 17:52:15,374 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:08,798 WARN L227 SmtUtils]: Spent 1.78m on a formula simplification. DAG size of input: 135 DAG size of output: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:55:25,426 WARN L227 SmtUtils]: Spent 1.12m on a formula simplification. DAG size of input: 137 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:55:58,317 WARN L227 SmtUtils]: Spent 26.45s on a formula simplification. DAG size of input: 89 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:56:23,659 WARN L227 SmtUtils]: Spent 18.50s on a formula simplification. DAG size of input: 91 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:56:25,663 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:42,617 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:44,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:47,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:47,259 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-11-25 17:56:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 17:56:47,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 17:56:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:47,260 INFO L225 Difference]: With dead ends: 23 [2021-11-25 17:56:47,260 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 17:56:47,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 266.6s TimeCoverageRelationStatistics Valid=231, Invalid=948, Unknown=11, NotChecked=0, Total=1190 [2021-11-25 17:56:47,263 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:47,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2021-11-25 17:56:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 17:56:47,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 17:56:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 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) [2021-11-25 17:56:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-25 17:56:47,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-25 17:56:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:47,270 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-25 17:56:47,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:47,270 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-25 17:56:47,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 17:56:47,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:47,271 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-25 17:56:47,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 17:56:47,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:56:47,499 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:56:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:47,499 INFO L85 PathProgramCache]: Analyzing trace with hash -313388890, now seen corresponding path program 3 times [2021-11-25 17:56:47,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:47,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789528551] [2021-11-25 17:56:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:47,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:47,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:47,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789528551] [2021-11-25 17:56:47,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789528551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:56:47,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210695349] [2021-11-25 17:56:47,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:56:47,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:56:47,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:56:47,926 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:56:47,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36337cd4-f767-4099-9627-fc1218b089e7/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 17:56:48,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:56:48,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:56:48,055 WARN L261 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-25 17:56:48,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:56:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:48,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:57:47,922 WARN L227 SmtUtils]: Spent 7.70s on a formula simplification that was a NOOP. DAG size: 143 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:58:14,795 WARN L227 SmtUtils]: Spent 7.98s on a formula simplification that was a NOOP. DAG size: 158 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:58:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 52 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:58:14,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210695349] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:58:14,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1244376463] [2021-11-25 17:58:14,800 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 17:58:14,800 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 17:58:14,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 17:58:14,801 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 17:58:14,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 17:58:14,933 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 17:58:16,255 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '375#(and (= |ULTIMATE.start_main_~y~0#1| 10000000) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 5000000 |ULTIMATE.start_main_~z~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 17:58:16,256 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 17:58:16,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 17:58:16,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2021-11-25 17:58:16,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211298676] [2021-11-25 17:58:16,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 17:58:16,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 17:58:16,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:58:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 17:58:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1243, Unknown=5, NotChecked=0, Total=1482 [2021-11-25 17:58:16,258 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 36 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 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) [2021-11-25 17:58:18,661 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse77 (mod (+ 2 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (let ((.cse63 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 8) 4294967296)) (.cse19 (mod (+ 7 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse52 (mod (+ 6 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse17 (mod (+ 5 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse44 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296)) (.cse46 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (.cse76 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296)) (.cse3 (* .cse77 4294967295)) (.cse18 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (.cse56 (mod (+ 3 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) (let ((.cse39 (<= .cse18 .cse56)) (.cse2 (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| .cse3 1) 4294967296) 0))) (.cse45 (<= .cse18 .cse76)) (.cse53 (<= .cse18 .cse46)) (.cse0 (<= 5000000 .cse46)) (.cse1 (< .cse76 5000000)) (.cse9 (<= 5000000 .cse77)) (.cse15 (< .cse56 5000000)) (.cse11 (< .cse44 5000000)) (.cse12 (<= 5000000 .cse44)) (.cse24 (<= 5000000 .cse17)) (.cse25 (<= 5000000 .cse52)) (.cse26 (< .cse19 5000000)) (.cse29 (< .cse63 5000000)) (.cse35 (<= 5000000 .cse63)) (.cse28 (<= 5000000 .cse19)) (.cse36 (< .cse52 5000000)) (.cse22 (< .cse17 5000000)) (.cse13 (<= 5000000 .cse56)) (.cse7 (< .cse77 5000000)) (.cse4 (<= 5000000 .cse76)) (.cse38 (mod (+ 9 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (.cse5 (<= .cse18 .cse77)) (.cse40 (* .cse76 4294967295)) (.cse16 (< .cse46 5000000))) (and (or .cse0 (and (or .cse1 .cse2) (or (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| .cse3) 4294967296) 0)) .cse4))) (or .cse5 (let ((.cse8 (* .cse17 4294967295))) (let ((.cse10 (not (= (mod (+ .cse8 |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296) 0))) (.cse14 (not (= (mod (+ .cse8 2 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) (.cse6 (not (= (mod (+ .cse8 |c_ULTIMATE.start_main_~z~0#1| 4) 4294967296) 0)))) (and (or .cse0 (and (or .cse1 .cse6) (or .cse4 (and (or .cse7 (not (= (mod (+ .cse8 3 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) (or .cse9 (and (or (and (or .cse10 .cse11) (or .cse12 (not (= (mod (+ .cse8 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)))) .cse13) (or .cse14 .cse15))))))) (or (and (or .cse10 .cse4) (or .cse1 (and (or .cse9 .cse14) (or (and (or (not (= (mod (+ 5 .cse8 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse11) (or .cse12 .cse6)) .cse7)))) .cse16))))) (or (<= .cse18 .cse19) (let ((.cse32 (* (mod (+ |c_ULTIMATE.start_main_~x~0#1| 10) 4294967296) 4294967295))) (let ((.cse34 (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| .cse32 1) 4294967296) 0))) (.cse27 (not (= (mod (+ 3 |c_ULTIMATE.start_main_~z~0#1| .cse32) 4294967296) 0))) (.cse21 (not (= (mod (+ 6 |c_ULTIMATE.start_main_~z~0#1| .cse32) 4294967296) 0))) (.cse33 (< .cse38 5000000)) (.cse31 (<= 5000000 .cse38)) (.cse37 (not (= (mod (+ 9 |c_ULTIMATE.start_main_~z~0#1| .cse32) 4294967296) 0))) (.cse20 (not (= (mod (+ 7 |c_ULTIMATE.start_main_~z~0#1| .cse32) 4294967296) 0))) (.cse23 (not (= (mod (+ 5 |c_ULTIMATE.start_main_~z~0#1| .cse32) 4294967296) 0))) (.cse30 (not (= (mod (+ 2 |c_ULTIMATE.start_main_~z~0#1| .cse32) 4294967296) 0)))) (and (or .cse0 (and (or (and (or (and (or .cse15 .cse20) (or .cse13 (and (or .cse21 .cse11) (or .cse12 (and (or .cse22 .cse23) (or .cse24 (and (or .cse25 (and (or .cse26 .cse27) (or .cse28 (and (or .cse29 .cse30) (or (and (or .cse31 (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| .cse32) 4294967296) 0))) (or .cse33 .cse34)) .cse35))))) (or (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| .cse32 4) 4294967296) 0)) .cse36)))))))) .cse9) (or (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| .cse32 8) 4294967296) 0)) .cse7)) .cse4) (or .cse1 .cse37))) (or (and (or .cse4 .cse34) (or .cse1 (and (or (and (or .cse13 .cse27) (or .cse15 (and (or .cse22 (and (or .cse25 .cse21) (or .cse36 (and (or (and (or (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| .cse32 10) 4294967296) 0)) .cse33) (or .cse31 .cse37)) .cse26) (or .cse28 .cse20))))) (or .cse24 .cse23)))) .cse7) (or .cse9 .cse30)))) .cse16)))) .cse39) (or .cse0 (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| .cse40) 4294967296) 0))) (or (let ((.cse42 (* .cse44 4294967295))) (let ((.cse41 (not (= (mod (+ .cse42 3 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) (.cse43 (not (= (mod (+ .cse42 |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296) 0)))) (and (or (and (or .cse1 (and (or .cse13 .cse41) (or .cse15 (not (= (mod (+ .cse42 |c_ULTIMATE.start_main_~z~0#1| 4) 4294967296) 0))))) (or .cse43 .cse4)) .cse16) (or .cse0 (and (or .cse1 .cse41) (or (and (or (not (= (mod (+ .cse42 2 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse7) (or .cse9 (and (or (not (= (mod (+ .cse42 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse13) (or .cse43 .cse15)))) .cse4)))))) .cse45) (not (= .cse46 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296))) (or (let ((.cse48 (* .cse52 4294967295))) (let ((.cse51 (not (= (mod (+ .cse48 |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296) 0))) (.cse50 (not (= (mod (+ .cse48 2 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) (.cse49 (not (= (mod (+ .cse48 3 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) (.cse47 (not (= (mod (+ 5 .cse48 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)))) (and (or .cse0 (and (or .cse1 .cse47) (or (and (or (not (= 0 (mod (+ .cse48 |c_ULTIMATE.start_main_~z~0#1| 4) 4294967296))) .cse7) (or .cse9 (and (or .cse15 .cse49) (or .cse13 (and (or .cse50 .cse11) (or .cse12 (and (or .cse24 (not (= (mod (+ .cse48 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) (or .cse22 .cse51)))))))) .cse4))) (or (and (or .cse51 .cse4) (or .cse1 (and (or .cse9 .cse50) (or (and (or .cse13 .cse49) (or .cse15 (and (or .cse24 .cse47) (or .cse22 (not (= (mod (+ .cse48 6 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)))))) .cse7)))) .cse16)))) .cse39) (or .cse53 (let ((.cse55 (* .cse56 4294967295))) (let ((.cse54 (not (= (mod (+ .cse55 2 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)))) (and (or .cse16 (and (or .cse9 .cse54) (or (not (= (mod (+ .cse55 3 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse7))) (or .cse0 (and (or .cse4 (and (or (not (= (mod (+ .cse55 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse9) (or .cse7 (not (= 0 (mod (+ .cse55 |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296)))))) (or .cse1 .cse54))))))) (or (and (or .cse4 .cse2) (or .cse1 (not (= (mod (+ 2 |c_ULTIMATE.start_main_~z~0#1| .cse3) 4294967296) 0)))) .cse16) (or (<= .cse18 .cse17) (let ((.cse58 (* .cse63 4294967295))) (let ((.cse59 (not (= (mod (+ .cse58 5 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) (.cse60 (not (= (mod (+ .cse58 |c_ULTIMATE.start_main_~z~0#1| 4) 4294967296) 0))) (.cse62 (not (= (mod (+ .cse58 |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296) 0))) (.cse61 (not (= (mod (+ .cse58 3 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) (.cse57 (not (= (mod (+ .cse58 7 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)))) (and (or .cse16 (and (or (and (or .cse15 (and (or .cse11 (and (or (and (or .cse57 .cse28) (or (not (= (mod (+ .cse58 |c_ULTIMATE.start_main_~z~0#1| 8) 4294967296) 0)) .cse26)) .cse22) (or .cse59 .cse24))) (or .cse12 .cse60))) (or .cse61 .cse13)) .cse1) (or .cse62 .cse4))) (or .cse0 (and (or (and (or .cse9 (and (or .cse59 .cse15) (or (and (or .cse60 .cse11) (or .cse12 (and (or .cse24 (and (or .cse25 (and (or .cse62 .cse26) (or .cse28 (not (= (mod (+ .cse58 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))))) (or (not (= (mod (+ .cse58 2 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse36))) (or .cse61 .cse22)))) .cse13))) (or (not (= (mod (+ .cse58 6 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse7)) .cse4) (or .cse1 .cse57)))))) .cse45) (or (<= .cse18 .cse44) .cse53 (let ((.cse64 (* .cse19 4294967295))) (let ((.cse65 (not (= (mod (+ 2 .cse64 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) (.cse67 (not (= (mod (+ .cse64 |c_ULTIMATE.start_main_~z~0#1| 4) 4294967296) 0))) (.cse68 (not (= (mod (+ 6 .cse64 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) (.cse66 (not (= (mod (+ 3 .cse64 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)))) (and (or .cse0 (and (or (and (or .cse9 (and (or .cse13 (and (or .cse12 (and (or .cse24 (and (or (not (= 0 (mod (+ .cse64 |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296))) .cse36) (or .cse25 (not (= (mod (+ .cse64 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))))) (or .cse22 .cse65))) (or .cse11 .cse66))) (or .cse15 .cse67))) (or (not (= (mod (+ 5 .cse64 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse7)) .cse4) (or .cse1 .cse68))) (or (and (or .cse9 .cse65) (or (and (or .cse15 (and (or .cse12 .cse67) (or (and (or .cse25 .cse68) (or (not (= (mod (+ 7 .cse64 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse36)) .cse11))) (or .cse13 .cse66)) .cse7)) .cse16))))) (or (<= .cse18 .cse52) (let ((.cse71 (* .cse38 4294967295))) (let ((.cse72 (not (= (mod (+ .cse71 |c_ULTIMATE.start_main_~z~0#1| 8) 4294967296) 0))) (.cse73 (not (= (mod (+ .cse71 6 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) (.cse70 (not (= (mod (+ .cse71 5 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) (.cse75 (not (= (mod (+ .cse71 2 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0))) (.cse69 (not (= (mod (+ .cse71 |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296) 0))) (.cse74 (not (= (mod (+ .cse71 |c_ULTIMATE.start_main_~z~0#1| 4) 4294967296) 0)))) (and (or .cse16 (and (or .cse69 .cse4) (or (and (or (and (or (and (or .cse24 .cse70) (or .cse22 (and (or (and (or (not (= (mod (+ .cse71 9 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse29) (or .cse72 .cse35)) .cse36) (or .cse25 .cse73)))) .cse11) (or .cse12 .cse74)) .cse7) (or .cse9 .cse75)) .cse1))) (or .cse0 (and (or .cse1 .cse72) (or (and (or .cse9 (and (or .cse15 .cse73) (or (and (or .cse70 .cse11) (or .cse12 (and (or .cse24 (and (or .cse25 (and (or .cse75 .cse26) (or (and (or .cse69 .cse29) (or (not (= (mod (+ .cse71 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse35)) .cse28))) (or (not (= (mod (+ .cse71 3 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse36))) (or .cse74 .cse22)))) .cse13))) (or (not (= (mod (+ .cse71 7 |c_ULTIMATE.start_main_~z~0#1|) 4294967296) 0)) .cse7)) .cse4)))))) .cse5) (or (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| .cse40 1) 4294967296) 0)) .cse16))))) is different from false