./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta --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 c506323d3bd63f7e6137c28fc1be825d2491f66f4e75ccbab60530df37ca16f1 --- 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-dbf71c6-m [2022-10-17 17:15:15,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:15:15,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:15:15,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:15:15,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:15:15,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:15:15,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:15:15,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:15:15,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:15:15,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:15:15,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:15:15,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:15:15,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:15:15,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:15:15,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:15:15,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:15:15,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:15:15,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:15:15,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:15:15,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:15:15,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:15:15,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:15:15,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:15:15,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:15:15,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:15:15,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:15:15,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:15:15,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:15:15,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:15:15,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:15:15,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:15:15,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:15:15,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:15:15,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:15:15,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:15:15,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:15:15,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:15:15,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:15:15,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:15:15,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:15:15,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:15:15,966 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:15:16,008 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:15:16,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:15:16,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:15:16,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:15:16,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:15:16,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:15:16,011 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:15:16,011 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:15:16,011 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:15:16,011 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:15:16,012 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:15:16,012 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:15:16,012 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:15:16,012 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:15:16,012 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:15:16,013 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:15:16,013 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:15:16,013 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:15:16,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:15:16,014 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:15:16,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:15:16,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:15:16,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:15:16,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:15:16,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:15:16,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:15:16,016 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:15:16,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:15:16,016 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:15:16,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:15:16,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:15:16,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:15:16,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:15:16,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:15:16,018 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:15:16,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:15:16,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:15:16,019 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:15:16,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:15:16,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:15:16,019 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:15:16,020 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_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c506323d3bd63f7e6137c28fc1be825d2491f66f4e75ccbab60530df37ca16f1 [2022-10-17 17:15:16,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:15:16,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:15:16,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:15:16,356 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:15:16,357 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:15:16,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_11.c [2022-10-17 17:15:16,437 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/data/5a7fd6de4/8ec3bb8d564f4aefaa671d55737aff2c/FLAG474afb0aa [2022-10-17 17:15:16,912 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:15:16,912 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/sv-benchmarks/c/loops-crafted-1/mono-crafted_11.c [2022-10-17 17:15:16,918 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/data/5a7fd6de4/8ec3bb8d564f4aefaa671d55737aff2c/FLAG474afb0aa [2022-10-17 17:15:17,276 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/data/5a7fd6de4/8ec3bb8d564f4aefaa671d55737aff2c [2022-10-17 17:15:17,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:15:17,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:15:17,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:15:17,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:15:17,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:15:17,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:15:17" (1/1) ... [2022-10-17 17:15:17,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@611aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17, skipping insertion in model container [2022-10-17 17:15:17,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:15:17" (1/1) ... [2022-10-17 17:15:17,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:15:17,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:15:17,525 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_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/sv-benchmarks/c/loops-crafted-1/mono-crafted_11.c[319,332] [2022-10-17 17:15:17,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:15:17,557 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:15:17,579 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_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/sv-benchmarks/c/loops-crafted-1/mono-crafted_11.c[319,332] [2022-10-17 17:15:17,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:15:17,603 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:15:17,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17 WrapperNode [2022-10-17 17:15:17,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:15:17,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:15:17,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:15:17,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:15:17,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17" (1/1) ... [2022-10-17 17:15:17,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17" (1/1) ... [2022-10-17 17:15:17,646 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28 [2022-10-17 17:15:17,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:15:17,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:15:17,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:15:17,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:15:17,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17" (1/1) ... [2022-10-17 17:15:17,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17" (1/1) ... [2022-10-17 17:15:17,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17" (1/1) ... [2022-10-17 17:15:17,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17" (1/1) ... [2022-10-17 17:15:17,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17" (1/1) ... [2022-10-17 17:15:17,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17" (1/1) ... [2022-10-17 17:15:17,676 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17" (1/1) ... [2022-10-17 17:15:17,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17" (1/1) ... [2022-10-17 17:15:17,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:15:17,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:15:17,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:15:17,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:15:17,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17" (1/1) ... [2022-10-17 17:15:17,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:15:17,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:15:17,726 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:15:17,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:15:17,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:15:17,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:15:17,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:15:17,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:15:17,861 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:15:17,863 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:15:18,009 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:15:18,047 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:15:18,047 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:15:18,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:15:18 BoogieIcfgContainer [2022-10-17 17:15:18,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:15:18,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:15:18,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:15:18,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:15:18,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:15:17" (1/3) ... [2022-10-17 17:15:18,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6293483e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:15:18, skipping insertion in model container [2022-10-17 17:15:18,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:15:17" (2/3) ... [2022-10-17 17:15:18,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6293483e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:15:18, skipping insertion in model container [2022-10-17 17:15:18,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:15:18" (3/3) ... [2022-10-17 17:15:18,061 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_11.c [2022-10-17 17:15:18,083 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:15:18,084 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:15:18,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:15:18,151 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;@75494a2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:15:18,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:15:18,156 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) [2022-10-17 17:15:18,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-17 17:15:18,163 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:18,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-17 17:15:18,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:15:18,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:18,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2036168, now seen corresponding path program 1 times [2022-10-17 17:15:18,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:18,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834054232] [2022-10-17 17:15:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:18,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:18,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:18,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834054232] [2022-10-17 17:15:18,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834054232] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:15:18,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:15:18,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:15:18,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995544046] [2022-10-17 17:15:18,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:15:18,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:15:18,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:18,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:15:18,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:15:18,484 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) [2022-10-17 17:15:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:18,519 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-10-17 17:15:18,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:15:18,522 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 [2022-10-17 17:15:18,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:18,531 INFO L225 Difference]: With dead ends: 13 [2022-10-17 17:15:18,532 INFO L226 Difference]: Without dead ends: 6 [2022-10-17 17:15:18,535 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:15:18,540 INFO L413 NwaCegarLoop]: 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 [2022-10-17 17:15:18,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:15:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-10-17 17:15:18,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-10-17 17:15:18,576 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) [2022-10-17 17:15:18,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-10-17 17:15:18,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-10-17 17:15:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:18,579 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-10-17 17:15:18,579 INFO L496 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) [2022-10-17 17:15:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-10-17 17:15:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-17 17:15:18,580 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:18,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-17 17:15:18,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:15:18,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:15:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash 63077927, now seen corresponding path program 1 times [2022-10-17 17:15:18,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:18,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871681720] [2022-10-17 17:15:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:18,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:18,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:18,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871681720] [2022-10-17 17:15:18,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871681720] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:15:18,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138811604] [2022-10-17 17:15:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:18,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:15:18,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:15:18,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:15:18,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:15:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:18,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:15:18,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:15:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:19,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:15:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:19,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138811604] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:15:19,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20943780] [2022-10-17 17:15:19,625 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-10-17 17:15:19,625 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:15:19,630 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:15:19,637 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:15:19,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:15:20,379 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:15:20,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '70#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 100000000)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:15:20,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:15:20,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:15:20,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 7 [2022-10-17 17:15:20,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896937455] [2022-10-17 17:15:20,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:15:20,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:15:20,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:20,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:15:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:15:20,549 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) [2022-10-17 17:15:21,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:21,031 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2022-10-17 17:15:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:15:21,032 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 [2022-10-17 17:15:21,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:21,033 INFO L225 Difference]: With dead ends: 14 [2022-10-17 17:15:21,033 INFO L226 Difference]: Without dead ends: 10 [2022-10-17 17:15:21,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-10-17 17:15:21,036 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:21,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:15:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-10-17 17:15:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-10-17 17:15:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:21,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2022-10-17 17:15:21,043 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2022-10-17 17:15:21,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:21,043 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2022-10-17 17:15:21,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) [2022-10-17 17:15:21,044 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2022-10-17 17:15:21,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:15:21,044 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:21,045 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1] [2022-10-17 17:15:21,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:15:21,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:15:21,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:15:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:21,246 INFO L85 PathProgramCache]: Analyzing trace with hash -183576985, now seen corresponding path program 2 times [2022-10-17 17:15:21,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:21,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547511443] [2022-10-17 17:15:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:21,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:21,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:21,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547511443] [2022-10-17 17:15:21,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547511443] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:15:21,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705957518] [2022-10-17 17:15:21,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:15:21,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:15:21,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:15:21,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:15:22,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:15:22,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-17 17:15:22,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:15:22,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 17:15:22,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:15:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:22,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:15:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:23,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705957518] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:15:23,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [19821919] [2022-10-17 17:15:23,161 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-10-17 17:15:23,161 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:15:23,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:15:23,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:15:23,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:15:23,377 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:15:23,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '177#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (= (ite (= (mod |ULTIMATE.start_main_~x~0#1| 2) 0) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 100000000)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:15:23,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:15:23,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:15:23,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2022-10-17 17:15:23,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926335396] [2022-10-17 17:15:23,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:15:23,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-17 17:15:23,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:15:23,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-17 17:15:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-10-17 17:15:23,628 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:30,637 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (< (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296) 100000000))) (and (not (<= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (or (< (+ 4294967289 (* 4294967296 (div (+ |c_ULTIMATE.start_main_~x~0#1| (- 99999994)) 4294967296))) |c_ULTIMATE.start_main_~x~0#1|) (let ((.cse0 (+ |c_ULTIMATE.start_main_~x~0#1| 3))) (< (* (div .cse0 2) 2) .cse0))) (or (< |c_ULTIMATE.start_main_~x~0#1| (+ 1 (* (div |c_ULTIMATE.start_main_~x~0#1| 2) 2))) (< (+ (* 4294967296 (div (+ |c_ULTIMATE.start_main_~x~0#1| (- 99999998)) 4294967296)) 4294967293) |c_ULTIMATE.start_main_~x~0#1|)) (or (< (* (div (+ |c_ULTIMATE.start_main_~x~0#1| 4294967298) 4294967296) 4294967296) (+ 4194967299 |c_ULTIMATE.start_main_~x~0#1|)) (let ((.cse1 (+ 7 |c_ULTIMATE.start_main_~x~0#1|))) (< (* 2 (div .cse1 2)) .cse1)) (< (+ 4294967285 (* (div (+ |c_ULTIMATE.start_main_~x~0#1| (- 99999990)) 4294967296) 4294967296)) |c_ULTIMATE.start_main_~x~0#1|)) (or (let ((.cse2 (+ |c_ULTIMATE.start_main_~x~0#1| 1))) (< (* 2 (div .cse2 2)) .cse2)) (< (+ (* (div (+ (- 99999996) |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 4294967296) 4294967291) |c_ULTIMATE.start_main_~x~0#1|)) (or .cse3 (= (mod |c_ULTIMATE.start_main_~x~0#1| 2) 0)) (or (let ((.cse4 (+ |c_ULTIMATE.start_main_~x~0#1| 5))) (< (* (div .cse4 2) 2) .cse4)) (not .cse3) (< (+ 4294967287 (* (div (+ (- 99999992) |c_ULTIMATE.start_main_~x~0#1|) 4294967296) 4294967296)) |c_ULTIMATE.start_main_~x~0#1|)))) is different from false [2022-10-17 17:15:37,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:15:37,407 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2022-10-17 17:15:37,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 17:15:37,408 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 17:15:37,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:15:37,409 INFO L225 Difference]: With dead ends: 22 [2022-10-17 17:15:37,409 INFO L226 Difference]: Without dead ends: 18 [2022-10-17 17:15:37,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=181, Invalid=422, Unknown=1, NotChecked=46, Total=650 [2022-10-17 17:15:37,411 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:15:37,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 13 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 17:15:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-10-17 17:15:37,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-10-17 17:15:37,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-10-17 17:15:37,419 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 9 [2022-10-17 17:15:37,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:15:37,420 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-10-17 17:15:37,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:15:37,420 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-10-17 17:15:37,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 17:15:37,421 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:15:37,422 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1] [2022-10-17 17:15:37,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-10-17 17:15:37,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:15:37,626 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:15:37,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:15:37,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1199233305, now seen corresponding path program 3 times [2022-10-17 17:15:37,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:15:37,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238010235] [2022-10-17 17:15:37,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:15:37,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:15:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:15:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:38,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:15:38,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238010235] [2022-10-17 17:15:38,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238010235] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:15:38,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816580551] [2022-10-17 17:15:38,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:15:38,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:15:38,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:15:38,742 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:15:38,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d05b4ec-b79a-4fa5-9c1d-0ba1ed4c9195/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:15:38,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:15:38,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:15:38,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 30 conjunts are in the unsatisfiable core [2022-10-17 17:15:38,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:15:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:39,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:15:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:15:51,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816580551] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:15:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [956117073] [2022-10-17 17:15:51,114 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-10-17 17:15:51,115 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:15:51,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:15:51,115 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:15:51,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:15:51,326 INFO L180 IcfgInterpreter]: Interpretation finished