./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW --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 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --- 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-4e7fbc6 [2022-11-23 16:09:03,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:09:03,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:09:03,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:09:03,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:09:03,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:09:03,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:09:03,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:09:03,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:09:03,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:09:03,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:09:03,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:09:03,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:09:03,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:09:03,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:09:03,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:09:03,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:09:03,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:09:03,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:09:03,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:09:03,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:09:03,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:09:03,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:09:03,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:09:03,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:09:03,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:09:03,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:09:03,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:09:03,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:09:03,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:09:03,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:09:03,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:09:03,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:09:03,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:09:03,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:09:03,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:09:03,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:09:03,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:09:03,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:09:03,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:09:03,950 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:09:03,951 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 16:09:03,998 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:09:03,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:09:03,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:09:04,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:09:04,001 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:09:04,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:09:04,002 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:09:04,002 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:09:04,002 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:09:04,002 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:09:04,003 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:09:04,003 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:09:04,004 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:09:04,004 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:09:04,004 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:09:04,004 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:09:04,005 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:09:04,005 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:09:04,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:09:04,006 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:09:04,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:09:04,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:09:04,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:09:04,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:09:04,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:09:04,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:09:04,008 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:09:04,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:09:04,008 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:09:04,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:09:04,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:09:04,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:09:04,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:09:04,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:09:04,010 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:09:04,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:09:04,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:09:04,010 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:09:04,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:09:04,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:09:04,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:09:04,011 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_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d [2022-11-23 16:09:04,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:09:04,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:09:04,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:09:04,292 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:09:04,292 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:09:04,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/loops-crafted-1/in-de52.c [2022-11-23 16:09:07,399 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:09:07,612 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:09:07,613 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/sv-benchmarks/c/loops-crafted-1/in-de52.c [2022-11-23 16:09:07,619 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/data/3bfa45b88/f516e065de344120a7828f04297a6a0f/FLAG86905c11b [2022-11-23 16:09:07,634 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/data/3bfa45b88/f516e065de344120a7828f04297a6a0f [2022-11-23 16:09:07,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:09:07,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:09:07,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:09:07,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:09:07,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:09:07,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:09:07" (1/1) ... [2022-11-23 16:09:07,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2785dcc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07, skipping insertion in model container [2022-11-23 16:09:07,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:09:07" (1/1) ... [2022-11-23 16:09:07,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:09:07,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:09:07,818 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2022-11-23 16:09:07,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:09:07,842 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:09:07,856 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2022-11-23 16:09:07,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:09:07,871 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:09:07,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07 WrapperNode [2022-11-23 16:09:07,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:09:07,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:09:07,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:09:07,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:09:07,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 16:09:07,887 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 16:09:07,908 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2022-11-23 16:09:07,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:09:07,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:09:07,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:09:07,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:09:07,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 16:09:07,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 16:09:07,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 16:09:07,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 16:09:07,922 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 16:09:07,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 16:09:07,929 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 16:09:07,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 16:09:07,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:09:07,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:09:07,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:09:07,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:09:07,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (1/1) ... [2022-11-23 16:09:07,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:09:07,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:07,967 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:09:07,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:09:08,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:09:08,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:09:08,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:09:08,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:09:08,084 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:09:08,086 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:09:08,325 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:09:08,376 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:09:08,376 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-23 16:09:08,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:09:08 BoogieIcfgContainer [2022-11-23 16:09:08,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:09:08,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:09:08,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:09:08,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:09:08,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:09:07" (1/3) ... [2022-11-23 16:09:08,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723b53d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:09:08, skipping insertion in model container [2022-11-23 16:09:08,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:09:07" (2/3) ... [2022-11-23 16:09:08,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723b53d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:09:08, skipping insertion in model container [2022-11-23 16:09:08,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:09:08" (3/3) ... [2022-11-23 16:09:08,391 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2022-11-23 16:09:08,412 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:09:08,412 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 16:09:08,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:09:08,490 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;@763d35b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:09:08,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 16:09:08,495 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 16:09:08,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:08,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:08,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:08,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:08,509 INFO L85 PathProgramCache]: Analyzing trace with hash -367575822, now seen corresponding path program 1 times [2022-11-23 16:09:08,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:08,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505483013] [2022-11-23 16:09:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:08,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:09:08,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505483013] [2022-11-23 16:09:08,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505483013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:08,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:08,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:09:08,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699933528] [2022-11-23 16:09:08,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:08,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:09:08,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:08,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:09:08,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:09:08,981 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2022-11-23 16:09:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:09,070 INFO L93 Difference]: Finished difference Result 27 states and 40 transitions. [2022-11-23 16:09:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:09:09,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) Word has length 8 [2022-11-23 16:09:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:09,082 INFO L225 Difference]: With dead ends: 27 [2022-11-23 16:09:09,082 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 16:09:09,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:09:09,088 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:09,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 11 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:09:09,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 16:09:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 16:09:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2022-11-23 16:09:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2022-11-23 16:09:09,207 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 8 [2022-11-23 16:09:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:09,208 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2022-11-23 16:09:09,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2022-11-23 16:09:09,209 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2022-11-23 16:09:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 16:09:09,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:09,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:09,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:09:09,211 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:09,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:09,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1459416652, now seen corresponding path program 1 times [2022-11-23 16:09:09,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:09,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980461330] [2022-11-23 16:09:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:09,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:09:09,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:09,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980461330] [2022-11-23 16:09:09,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980461330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:09,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:09,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:09:09,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326532729] [2022-11-23 16:09:09,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:09,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:09:09,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:09,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:09:09,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:09,298 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:09,347 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2022-11-23 16:09:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:09:09,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 16:09:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:09,348 INFO L225 Difference]: With dead ends: 24 [2022-11-23 16:09:09,348 INFO L226 Difference]: Without dead ends: 19 [2022-11-23 16:09:09,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:09,350 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:09,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 7 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:09:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-23 16:09:09,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-23 16:09:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 29 transitions. [2022-11-23 16:09:09,362 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 29 transitions. Word has length 9 [2022-11-23 16:09:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:09,362 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 29 transitions. [2022-11-23 16:09:09,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 29 transitions. [2022-11-23 16:09:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 16:09:09,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:09,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:09,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:09:09,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:09,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1489237443, now seen corresponding path program 1 times [2022-11-23 16:09:09,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:09,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765469471] [2022-11-23 16:09:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:09,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:09:09,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:09,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765469471] [2022-11-23 16:09:09,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765469471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:09,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:09,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:09:09,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118555425] [2022-11-23 16:09:09,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:09,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:09:09,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:09,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:09:09,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:09,459 INFO L87 Difference]: Start difference. First operand 19 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:09,522 INFO L93 Difference]: Finished difference Result 30 states and 45 transitions. [2022-11-23 16:09:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:09:09,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 16:09:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:09,523 INFO L225 Difference]: With dead ends: 30 [2022-11-23 16:09:09,524 INFO L226 Difference]: Without dead ends: 23 [2022-11-23 16:09:09,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:09:09,526 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:09,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:09:09,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-23 16:09:09,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-23 16:09:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:09,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2022-11-23 16:09:09,551 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 9 [2022-11-23 16:09:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:09,551 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2022-11-23 16:09:09,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2022-11-23 16:09:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 16:09:09,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:09,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:09,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:09:09,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:09,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1845245090, now seen corresponding path program 1 times [2022-11-23 16:09:09,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:09,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233730896] [2022-11-23 16:09:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:09,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:09,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:09:09,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:09,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233730896] [2022-11-23 16:09:09,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233730896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:09:09,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:09:09,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:09:09,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564285404] [2022-11-23 16:09:09,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:09,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:09:09,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:09,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:09:09,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:09:09,714 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:09,796 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2022-11-23 16:09:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:09:09,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 16:09:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:09,801 INFO L225 Difference]: With dead ends: 29 [2022-11-23 16:09:09,801 INFO L226 Difference]: Without dead ends: 20 [2022-11-23 16:09:09,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:09:09,803 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:09,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:09:09,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-23 16:09:09,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-23 16:09:09,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:09,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2022-11-23 16:09:09,814 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 10 [2022-11-23 16:09:09,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:09,814 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2022-11-23 16:09:09,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2022-11-23 16:09:09,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 16:09:09,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:09,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:09,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 16:09:09,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:09,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:09,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2090397055, now seen corresponding path program 1 times [2022-11-23 16:09:09,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:09,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550234530] [2022-11-23 16:09:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:09,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:09:09,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:09,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550234530] [2022-11-23 16:09:09,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550234530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:09,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531214281] [2022-11-23 16:09:09,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:09,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:09,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:10,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:10,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:09:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:10,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 16:09:10,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:09:10,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:09:10,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531214281] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:10,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:09:10,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-11-23 16:09:10,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822710441] [2022-11-23 16:09:10,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:10,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:09:10,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:10,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:09:10,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:09:10,233 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-23 16:09:10,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:10,279 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2022-11-23 16:09:10,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:09:10,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 11 [2022-11-23 16:09:10,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:10,281 INFO L225 Difference]: With dead ends: 25 [2022-11-23 16:09:10,286 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 16:09:10,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:09:10,288 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:10,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:09:10,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 16:09:10,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-23 16:09:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:10,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2022-11-23 16:09:10,299 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 11 [2022-11-23 16:09:10,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:10,299 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2022-11-23 16:09:10,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-23 16:09:10,299 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2022-11-23 16:09:10,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 16:09:10,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:10,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:10,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 16:09:10,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:10,505 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash 235437997, now seen corresponding path program 1 times [2022-11-23 16:09:10,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:10,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12531928] [2022-11-23 16:09:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:10,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:09:10,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:10,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12531928] [2022-11-23 16:09:10,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12531928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:10,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969134542] [2022-11-23 16:09:10,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:10,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:10,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:10,617 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:10,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:09:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 16:09:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:09:10,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:09:10,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969134542] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:10,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:09:10,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 8 [2022-11-23 16:09:10,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608336335] [2022-11-23 16:09:10,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:09:10,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:09:10,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:10,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:09:10,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:09:10,744 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-23 16:09:10,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:10,775 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-11-23 16:09:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:09:10,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 11 [2022-11-23 16:09:10,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:10,777 INFO L225 Difference]: With dead ends: 20 [2022-11-23 16:09:10,777 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 16:09:10,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:09:10,778 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:10,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:09:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 16:09:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 16:09:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2022-11-23 16:09:10,795 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2022-11-23 16:09:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:10,796 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2022-11-23 16:09:10,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-23 16:09:10,796 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2022-11-23 16:09:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 16:09:10,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:10,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:10,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:11,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:11,004 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:11,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:11,004 INFO L85 PathProgramCache]: Analyzing trace with hash 86783420, now seen corresponding path program 1 times [2022-11-23 16:09:11,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:11,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330893218] [2022-11-23 16:09:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:11,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:09:11,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330893218] [2022-11-23 16:09:11,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330893218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686448663] [2022-11-23 16:09:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:11,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:11,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:11,170 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:11,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:09:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:11,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 16:09:11,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:09:11,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:09:11,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686448663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:11,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [555794209] [2022-11-23 16:09:11,627 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:11,627 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:11,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:11,638 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:11,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:11,830 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:11,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '702#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:11,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:11,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:11,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-23 16:09:11,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538417013] [2022-11-23 16:09:11,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:11,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 16:09:11,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:11,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 16:09:11,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-23 16:09:11,980 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:12,309 INFO L93 Difference]: Finished difference Result 51 states and 74 transitions. [2022-11-23 16:09:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 16:09:12,309 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 16:09:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:12,311 INFO L225 Difference]: With dead ends: 51 [2022-11-23 16:09:12,311 INFO L226 Difference]: Without dead ends: 38 [2022-11-23 16:09:12,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-11-23 16:09:12,312 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:12,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 21 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:09:12,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-23 16:09:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2022-11-23 16:09:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-11-23 16:09:12,324 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-11-23 16:09:12,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:12,324 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-11-23 16:09:12,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-11-23 16:09:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 16:09:12,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:12,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:12,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:12,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:12,531 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash 116604211, now seen corresponding path program 1 times [2022-11-23 16:09:12,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097227433] [2022-11-23 16:09:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:12,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:09:12,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:12,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097227433] [2022-11-23 16:09:12,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097227433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:12,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918302120] [2022-11-23 16:09:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:12,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:12,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:12,671 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:12,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 16:09:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:12,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 16:09:12,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:09:12,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:09:12,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918302120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:12,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662845196] [2022-11-23 16:09:12,813 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:12,813 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:12,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:12,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:12,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:13,017 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:13,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '925#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:13,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:13,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:13,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-23 16:09:13,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390191614] [2022-11-23 16:09:13,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:13,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:09:13,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:09:13,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-23 16:09:13,109 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:13,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:13,164 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-11-23 16:09:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:09:13,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 16:09:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:13,167 INFO L225 Difference]: With dead ends: 40 [2022-11-23 16:09:13,167 INFO L226 Difference]: Without dead ends: 33 [2022-11-23 16:09:13,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-23 16:09:13,171 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:13,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:09:13,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-23 16:09:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-23 16:09:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:13,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2022-11-23 16:09:13,196 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 12 [2022-11-23 16:09:13,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:13,196 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2022-11-23 16:09:13,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:13,197 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2022-11-23 16:09:13,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 16:09:13,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:13,198 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:13,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:13,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 16:09:13,404 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:13,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash 843996659, now seen corresponding path program 1 times [2022-11-23 16:09:13,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:13,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459578252] [2022-11-23 16:09:13,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:13,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:09:13,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:13,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459578252] [2022-11-23 16:09:13,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459578252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:13,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834708559] [2022-11-23 16:09:13,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:13,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:13,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:13,509 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:13,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 16:09:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:13,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 16:09:13,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:09:13,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:09:13,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834708559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:13,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1777429423] [2022-11-23 16:09:13,632 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:13,632 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:13,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:13,632 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:13,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:13,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:13,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1145#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:13,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:13,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:13,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-23 16:09:13,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197192141] [2022-11-23 16:09:13,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:13,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:09:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:09:13,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-23 16:09:13,857 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:13,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:13,904 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2022-11-23 16:09:13,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:09:13,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 16:09:13,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:13,906 INFO L225 Difference]: With dead ends: 41 [2022-11-23 16:09:13,906 INFO L226 Difference]: Without dead ends: 25 [2022-11-23 16:09:13,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-23 16:09:13,907 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:13,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:09:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-23 16:09:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-23 16:09:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2022-11-23 16:09:13,918 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 14 [2022-11-23 16:09:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:13,919 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2022-11-23 16:09:13,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:13,919 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-11-23 16:09:13,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 16:09:13,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:13,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:13,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:14,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 16:09:14,126 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:14,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:14,126 INFO L85 PathProgramCache]: Analyzing trace with hash -384821598, now seen corresponding path program 2 times [2022-11-23 16:09:14,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:14,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421093808] [2022-11-23 16:09:14,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:14,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:09:14,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:14,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421093808] [2022-11-23 16:09:14,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421093808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:14,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735035588] [2022-11-23 16:09:14,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:09:14,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:14,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:14,262 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:14,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 16:09:14,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 16:09:14,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:09:14,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 16:09:14,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:09:14,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 16:09:14,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735035588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:14,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032779866] [2022-11-23 16:09:14,514 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:14,515 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:14,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:14,515 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:14,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:14,662 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:14,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1364#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:14,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:14,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:14,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 15 [2022-11-23 16:09:14,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254678419] [2022-11-23 16:09:14,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:14,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 16:09:14,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 16:09:14,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-23 16:09:14,814 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:15,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:15,219 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2022-11-23 16:09:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 16:09:15,219 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 16:09:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:15,220 INFO L225 Difference]: With dead ends: 78 [2022-11-23 16:09:15,220 INFO L226 Difference]: Without dead ends: 58 [2022-11-23 16:09:15,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-11-23 16:09:15,221 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:15,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 53 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:09:15,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-23 16:09:15,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2022-11-23 16:09:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 59 transitions. [2022-11-23 16:09:15,241 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 59 transitions. Word has length 14 [2022-11-23 16:09:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:15,241 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 59 transitions. [2022-11-23 16:09:15,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 59 transitions. [2022-11-23 16:09:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 16:09:15,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:15,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:15,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:15,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 16:09:15,448 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:15,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:15,448 INFO L85 PathProgramCache]: Analyzing trace with hash 722354636, now seen corresponding path program 3 times [2022-11-23 16:09:15,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:15,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146711490] [2022-11-23 16:09:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:15,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:09:15,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:15,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146711490] [2022-11-23 16:09:15,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146711490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:15,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079146914] [2022-11-23 16:09:15,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:09:15,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:15,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:15,602 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:15,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 16:09:15,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:09:15,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:09:15,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:09:15,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:09:15,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:09:15,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079146914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:15,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [774796545] [2022-11-23 16:09:15,743 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:15,744 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:15,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:15,744 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:15,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:15,903 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:16,050 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1686#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:16,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:16,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:16,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2022-11-23 16:09:16,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659484623] [2022-11-23 16:09:16,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:16,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 16:09:16,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:16,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 16:09:16,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-23 16:09:16,052 INFO L87 Difference]: Start difference. First operand 40 states and 59 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:16,631 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2022-11-23 16:09:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 16:09:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 16:09:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:16,632 INFO L225 Difference]: With dead ends: 73 [2022-11-23 16:09:16,632 INFO L226 Difference]: Without dead ends: 53 [2022-11-23 16:09:16,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 16:09:16,633 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:16,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 37 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:09:16,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-23 16:09:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2022-11-23 16:09:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2022-11-23 16:09:16,668 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 15 [2022-11-23 16:09:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:16,669 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2022-11-23 16:09:16,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2022-11-23 16:09:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 16:09:16,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:16,674 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:16,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-23 16:09:16,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:16,880 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:16,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1711438177, now seen corresponding path program 2 times [2022-11-23 16:09:16,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:16,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054671157] [2022-11-23 16:09:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:16,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:09:17,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:17,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054671157] [2022-11-23 16:09:17,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054671157] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:17,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972259352] [2022-11-23 16:09:17,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:09:17,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:17,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:17,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:17,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 16:09:17,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 16:09:17,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:09:17,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 16:09:17,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:09:17,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:09:17,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972259352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:17,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1617299739] [2022-11-23 16:09:17,375 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:17,375 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:17,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:17,375 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:17,375 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:17,513 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:17,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2061#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:17,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:17,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:17,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-11-23 16:09:17,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428509991] [2022-11-23 16:09:17,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:17,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 16:09:17,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:17,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 16:09:17,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-11-23 16:09:17,675 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:19,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:19,214 INFO L93 Difference]: Finished difference Result 139 states and 191 transitions. [2022-11-23 16:09:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-23 16:09:19,214 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 16:09:19,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:19,215 INFO L225 Difference]: With dead ends: 139 [2022-11-23 16:09:19,215 INFO L226 Difference]: Without dead ends: 110 [2022-11-23 16:09:19,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=305, Invalid=2451, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 16:09:19,216 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 109 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:19,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 124 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 16:09:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-23 16:09:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2022-11-23 16:09:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 67 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2022-11-23 16:09:19,248 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 15 [2022-11-23 16:09:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:19,249 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2022-11-23 16:09:19,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:19,249 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2022-11-23 16:09:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 16:09:19,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:19,250 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:19,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:19,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:19,455 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:19,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1841787794, now seen corresponding path program 3 times [2022-11-23 16:09:19,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:19,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143132897] [2022-11-23 16:09:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:19,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:09:19,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:19,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143132897] [2022-11-23 16:09:19,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143132897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:19,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296828539] [2022-11-23 16:09:19,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:09:19,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:19,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:19,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:19,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 16:09:19,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:09:19,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:09:19,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 16:09:19,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:09:19,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:09:19,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296828539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:19,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101634069] [2022-11-23 16:09:19,787 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:19,787 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:19,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:19,788 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:19,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:19,886 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:19,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2600#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:19,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:19,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:19,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-11-23 16:09:19,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882441319] [2022-11-23 16:09:19,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:19,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 16:09:19,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:19,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 16:09:19,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-23 16:09:19,982 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:20,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:20,092 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2022-11-23 16:09:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:09:20,093 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 16:09:20,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:20,094 INFO L225 Difference]: With dead ends: 76 [2022-11-23 16:09:20,094 INFO L226 Difference]: Without dead ends: 68 [2022-11-23 16:09:20,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-23 16:09:20,096 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:20,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:09:20,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-23 16:09:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-23 16:09:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.4029850746268657) internal successors, (94), 67 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2022-11-23 16:09:20,137 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 16 [2022-11-23 16:09:20,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:20,137 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2022-11-23 16:09:20,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2022-11-23 16:09:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 16:09:20,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:20,140 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:20,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:20,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 16:09:20,348 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:20,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:20,348 INFO L85 PathProgramCache]: Analyzing trace with hash -85029497, now seen corresponding path program 2 times [2022-11-23 16:09:20,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:20,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748700026] [2022-11-23 16:09:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:20,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 16:09:20,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:20,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748700026] [2022-11-23 16:09:20,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748700026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:20,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163832616] [2022-11-23 16:09:20,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:09:20,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:20,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:20,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:20,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 16:09:20,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 16:09:20,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:09:20,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 16:09:20,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 16:09:20,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 16:09:20,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163832616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:20,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1268308711] [2022-11-23 16:09:20,903 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:20,903 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:20,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:20,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:20,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:20,997 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:21,163 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2997#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:21,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:21,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:21,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 19 [2022-11-23 16:09:21,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804552333] [2022-11-23 16:09:21,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:21,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 16:09:21,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:21,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 16:09:21,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-11-23 16:09:21,165 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:22,923 INFO L93 Difference]: Finished difference Result 154 states and 215 transitions. [2022-11-23 16:09:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-23 16:09:22,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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) Word has length 17 [2022-11-23 16:09:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:22,924 INFO L225 Difference]: With dead ends: 154 [2022-11-23 16:09:22,924 INFO L226 Difference]: Without dead ends: 115 [2022-11-23 16:09:22,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=384, Invalid=2372, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 16:09:22,925 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:22,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 86 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 16:09:22,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-23 16:09:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 73. [2022-11-23 16:09:22,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 72 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:22,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 101 transitions. [2022-11-23 16:09:22,961 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 101 transitions. Word has length 17 [2022-11-23 16:09:22,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:22,961 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 101 transitions. [2022-11-23 16:09:22,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:22,962 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 101 transitions. [2022-11-23 16:09:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 16:09:22,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:22,963 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:22,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:23,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 16:09:23,168 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:23,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:23,169 INFO L85 PathProgramCache]: Analyzing trace with hash 759497404, now seen corresponding path program 4 times [2022-11-23 16:09:23,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:23,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281912698] [2022-11-23 16:09:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:23,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:09:23,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:23,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281912698] [2022-11-23 16:09:23,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281912698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:23,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622760451] [2022-11-23 16:09:23,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:09:23,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:23,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:23,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:23,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 16:09:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:23,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 16:09:23,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 16:09:23,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 16:09:23,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622760451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:23,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [399276507] [2022-11-23 16:09:23,537 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:23,537 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:23,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:23,538 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:23,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:23,636 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:23,791 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3605#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:23,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:23,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:23,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2022-11-23 16:09:23,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285141343] [2022-11-23 16:09:23,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:23,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 16:09:23,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:23,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 16:09:23,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-23 16:09:23,793 INFO L87 Difference]: Start difference. First operand 73 states and 101 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:25,394 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2022-11-23 16:09:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-23 16:09:25,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-23 16:09:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:25,395 INFO L225 Difference]: With dead ends: 138 [2022-11-23 16:09:25,395 INFO L226 Difference]: Without dead ends: 110 [2022-11-23 16:09:25,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=394, Invalid=3146, Unknown=0, NotChecked=0, Total=3540 [2022-11-23 16:09:25,397 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 76 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:25,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 43 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 16:09:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-23 16:09:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2022-11-23 16:09:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.4069767441860466) internal successors, (121), 86 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 121 transitions. [2022-11-23 16:09:25,436 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 121 transitions. Word has length 18 [2022-11-23 16:09:25,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:25,436 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 121 transitions. [2022-11-23 16:09:25,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:25,436 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 121 transitions. [2022-11-23 16:09:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 16:09:25,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:25,437 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:25,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:25,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 16:09:25,642 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:25,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:25,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1615552141, now seen corresponding path program 4 times [2022-11-23 16:09:25,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:25,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283276102] [2022-11-23 16:09:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:25,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:09:25,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:25,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283276102] [2022-11-23 16:09:25,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283276102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:25,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657120718] [2022-11-23 16:09:25,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:09:25,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:25,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:25,846 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:25,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 16:09:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:25,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 16:09:25,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 16:09:25,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 16:09:26,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657120718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:26,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1695778052] [2022-11-23 16:09:26,021 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:26,021 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:26,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:26,022 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:26,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:26,115 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:26,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4242#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:26,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:26,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:26,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 16 [2022-11-23 16:09:26,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454853246] [2022-11-23 16:09:26,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:26,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 16:09:26,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:26,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 16:09:26,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-11-23 16:09:26,273 INFO L87 Difference]: Start difference. First operand 87 states and 121 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:27,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:27,942 INFO L93 Difference]: Finished difference Result 187 states and 259 transitions. [2022-11-23 16:09:27,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-23 16:09:27,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-23 16:09:27,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:27,944 INFO L225 Difference]: With dead ends: 187 [2022-11-23 16:09:27,944 INFO L226 Difference]: Without dead ends: 154 [2022-11-23 16:09:27,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=2562, Unknown=0, NotChecked=0, Total=2862 [2022-11-23 16:09:27,946 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:27,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 108 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 16:09:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-23 16:09:27,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2022-11-23 16:09:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 97 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 131 transitions. [2022-11-23 16:09:27,996 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 131 transitions. Word has length 18 [2022-11-23 16:09:27,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:27,996 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 131 transitions. [2022-11-23 16:09:27,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 131 transitions. [2022-11-23 16:09:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 16:09:27,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:27,997 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:28,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:28,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 16:09:28,203 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:28,206 INFO L85 PathProgramCache]: Analyzing trace with hash 962312748, now seen corresponding path program 3 times [2022-11-23 16:09:28,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:28,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540638422] [2022-11-23 16:09:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:28,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 16:09:28,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:28,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540638422] [2022-11-23 16:09:28,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540638422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:28,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464914048] [2022-11-23 16:09:28,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:09:28,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:28,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:28,409 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:28,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 16:09:28,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:09:28,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:09:28,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 16:09:28,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 16:09:28,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 16:09:28,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464914048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:28,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [398897011] [2022-11-23 16:09:28,529 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:28,530 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:28,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:28,530 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:28,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:28,625 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:28,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4974#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:28,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:28,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:28,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-11-23 16:09:28,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865296040] [2022-11-23 16:09:28,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:28,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:09:28,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:28,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:09:28,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:09:28,721 INFO L87 Difference]: Start difference. First operand 98 states and 131 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:28,864 INFO L93 Difference]: Finished difference Result 109 states and 144 transitions. [2022-11-23 16:09:28,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:09:28,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) Word has length 19 [2022-11-23 16:09:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:28,866 INFO L225 Difference]: With dead ends: 109 [2022-11-23 16:09:28,866 INFO L226 Difference]: Without dead ends: 91 [2022-11-23 16:09:28,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:09:28,867 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:28,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 15 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:09:28,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-23 16:09:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-23 16:09:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.3555555555555556) internal successors, (122), 90 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 122 transitions. [2022-11-23 16:09:28,910 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 122 transitions. Word has length 19 [2022-11-23 16:09:28,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:28,910 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 122 transitions. [2022-11-23 16:09:28,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:28,910 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 122 transitions. [2022-11-23 16:09:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 16:09:28,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:28,911 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:28,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:29,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 16:09:29,117 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:29,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:29,117 INFO L85 PathProgramCache]: Analyzing trace with hash 784031602, now seen corresponding path program 5 times [2022-11-23 16:09:29,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:29,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871466236] [2022-11-23 16:09:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:29,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 16:09:29,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:29,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871466236] [2022-11-23 16:09:29,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871466236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:29,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793368031] [2022-11-23 16:09:29,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:09:29,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:29,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:29,314 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:29,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 16:09:29,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 16:09:29,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:09:29,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 16:09:29,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 16:09:29,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 16:09:29,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793368031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:29,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [791564561] [2022-11-23 16:09:29,773 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:29,773 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:29,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:29,774 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:29,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:29,873 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:30,100 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5507#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:30,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:30,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:30,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 25 [2022-11-23 16:09:30,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895050934] [2022-11-23 16:09:30,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:30,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 16:09:30,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:30,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 16:09:30,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-23 16:09:30,103 INFO L87 Difference]: Start difference. First operand 91 states and 122 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:34,621 INFO L93 Difference]: Finished difference Result 231 states and 325 transitions. [2022-11-23 16:09:34,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-23 16:09:34,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-23 16:09:34,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:34,623 INFO L225 Difference]: With dead ends: 231 [2022-11-23 16:09:34,623 INFO L226 Difference]: Without dead ends: 188 [2022-11-23 16:09:34,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=857, Invalid=6115, Unknown=0, NotChecked=0, Total=6972 [2022-11-23 16:09:34,627 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:34,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 182 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 16:09:34,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-23 16:09:34,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 99. [2022-11-23 16:09:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.4387755102040816) internal successors, (141), 98 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 141 transitions. [2022-11-23 16:09:34,674 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 141 transitions. Word has length 20 [2022-11-23 16:09:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:34,675 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 141 transitions. [2022-11-23 16:09:34,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 141 transitions. [2022-11-23 16:09:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 16:09:34,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:34,676 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:34,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:34,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 16:09:34,881 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:34,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:34,882 INFO L85 PathProgramCache]: Analyzing trace with hash 423408972, now seen corresponding path program 6 times [2022-11-23 16:09:34,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:34,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435499144] [2022-11-23 16:09:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:09:35,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:35,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435499144] [2022-11-23 16:09:35,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435499144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:35,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689006547] [2022-11-23 16:09:35,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:09:35,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:35,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:35,131 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:35,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 16:09:35,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:09:35,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:09:35,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 16:09:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:09:35,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:09:35,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689006547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:35,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [300363624] [2022-11-23 16:09:35,356 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:35,356 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:35,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:35,357 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:35,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:35,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:35,633 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6384#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:35,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:35,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:35,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-11-23 16:09:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516728636] [2022-11-23 16:09:35,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:35,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 16:09:35,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:35,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 16:09:35,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-11-23 16:09:35,641 INFO L87 Difference]: Start difference. First operand 99 states and 141 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:38,734 INFO L93 Difference]: Finished difference Result 204 states and 307 transitions. [2022-11-23 16:09:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-23 16:09:38,734 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-23 16:09:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:38,735 INFO L225 Difference]: With dead ends: 204 [2022-11-23 16:09:38,735 INFO L226 Difference]: Without dead ends: 172 [2022-11-23 16:09:38,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=628, Invalid=5692, Unknown=0, NotChecked=0, Total=6320 [2022-11-23 16:09:38,736 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:38,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 73 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 16:09:38,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-23 16:09:38,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2022-11-23 16:09:38,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.434108527131783) internal successors, (185), 129 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:38,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 185 transitions. [2022-11-23 16:09:38,780 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 185 transitions. Word has length 21 [2022-11-23 16:09:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:38,780 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 185 transitions. [2022-11-23 16:09:38,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 185 transitions. [2022-11-23 16:09:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 16:09:38,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:38,781 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:38,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:38,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:38,983 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:38,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:38,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1598829151, now seen corresponding path program 5 times [2022-11-23 16:09:38,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:38,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642909315] [2022-11-23 16:09:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:38,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 16:09:39,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:39,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642909315] [2022-11-23 16:09:39,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642909315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:39,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788101335] [2022-11-23 16:09:39,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:09:39,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:39,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:39,245 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:39,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 16:09:39,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 16:09:39,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:09:39,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 16:09:39,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 16:09:39,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 16:09:39,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788101335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:39,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1351486029] [2022-11-23 16:09:39,542 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:39,543 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:39,543 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:39,543 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:39,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:39,651 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:39,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7298#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:39,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:39,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:39,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 6] total 23 [2022-11-23 16:09:39,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191247159] [2022-11-23 16:09:39,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:39,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 16:09:39,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:39,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 16:09:39,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-11-23 16:09:39,823 INFO L87 Difference]: Start difference. First operand 130 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:41,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:41,561 INFO L93 Difference]: Finished difference Result 287 states and 397 transitions. [2022-11-23 16:09:41,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-23 16:09:41,562 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-23 16:09:41,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:41,563 INFO L225 Difference]: With dead ends: 287 [2022-11-23 16:09:41,564 INFO L226 Difference]: Without dead ends: 248 [2022-11-23 16:09:41,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=466, Invalid=2956, Unknown=0, NotChecked=0, Total=3422 [2022-11-23 16:09:41,565 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:41,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 284 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 16:09:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-23 16:09:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 138. [2022-11-23 16:09:41,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.3722627737226278) internal successors, (188), 137 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:41,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 188 transitions. [2022-11-23 16:09:41,610 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 188 transitions. Word has length 21 [2022-11-23 16:09:41,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:41,611 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 188 transitions. [2022-11-23 16:09:41,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:41,611 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 188 transitions. [2022-11-23 16:09:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 16:09:41,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:41,612 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:41,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:41,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:41,812 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2072742099, now seen corresponding path program 4 times [2022-11-23 16:09:41,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:41,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420689683] [2022-11-23 16:09:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:41,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 16:09:41,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:41,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420689683] [2022-11-23 16:09:41,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420689683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:41,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656388859] [2022-11-23 16:09:41,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:09:41,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:41,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:41,947 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:41,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 16:09:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:42,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 16:09:42,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 16:09:42,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 16:09:42,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656388859] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:42,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [848445081] [2022-11-23 16:09:42,087 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:42,087 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:42,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:42,088 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:42,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:42,175 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:42,272 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8304#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:42,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:42,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:42,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-23 16:09:42,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976819935] [2022-11-23 16:09:42,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:42,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:09:42,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:42,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:09:42,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:09:42,274 INFO L87 Difference]: Start difference. First operand 138 states and 188 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:42,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:42,458 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2022-11-23 16:09:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 16:09:42,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-23 16:09:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:42,459 INFO L225 Difference]: With dead ends: 154 [2022-11-23 16:09:42,459 INFO L226 Difference]: Without dead ends: 142 [2022-11-23 16:09:42,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-23 16:09:42,460 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:42,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:09:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-23 16:09:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-11-23 16:09:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3546099290780143) internal successors, (191), 141 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 191 transitions. [2022-11-23 16:09:42,519 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 191 transitions. Word has length 22 [2022-11-23 16:09:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:42,520 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 191 transitions. [2022-11-23 16:09:42,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 191 transitions. [2022-11-23 16:09:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 16:09:42,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:42,521 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:42,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:42,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:42,721 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:42,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:42,722 INFO L85 PathProgramCache]: Analyzing trace with hash -220541441, now seen corresponding path program 6 times [2022-11-23 16:09:42,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:42,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875083686] [2022-11-23 16:09:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:42,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 16:09:42,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:42,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875083686] [2022-11-23 16:09:42,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875083686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:42,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728676128] [2022-11-23 16:09:42,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:09:42,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:42,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:42,943 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:42,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 16:09:43,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:09:43,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:09:43,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 16:09:43,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 16:09:43,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 16:09:43,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728676128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:43,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1753134750] [2022-11-23 16:09:43,154 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:43,154 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:43,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:43,154 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:43,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:43,254 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:43,410 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9048#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:43,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:43,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:43,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-11-23 16:09:43,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251049036] [2022-11-23 16:09:43,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:43,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 16:09:43,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:43,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 16:09:43,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-11-23 16:09:43,411 INFO L87 Difference]: Start difference. First operand 142 states and 191 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:45,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:45,818 INFO L93 Difference]: Finished difference Result 226 states and 299 transitions. [2022-11-23 16:09:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 16:09:45,819 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-23 16:09:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:45,820 INFO L225 Difference]: With dead ends: 226 [2022-11-23 16:09:45,820 INFO L226 Difference]: Without dead ends: 196 [2022-11-23 16:09:45,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=387, Invalid=3273, Unknown=0, NotChecked=0, Total=3660 [2022-11-23 16:09:45,823 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 124 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:45,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 102 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 16:09:45,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-23 16:09:45,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2022-11-23 16:09:45,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3191489361702127) internal successors, (186), 141 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2022-11-23 16:09:45,882 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 23 [2022-11-23 16:09:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:45,882 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2022-11-23 16:09:45,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2022-11-23 16:09:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 16:09:45,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:45,884 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:45,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:46,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:46,085 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:46,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:46,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1115092589, now seen corresponding path program 5 times [2022-11-23 16:09:46,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:46,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921234449] [2022-11-23 16:09:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:46,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 16:09:46,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:46,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921234449] [2022-11-23 16:09:46,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921234449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:46,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420724023] [2022-11-23 16:09:46,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:09:46,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:46,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:46,290 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:46,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 16:09:46,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 16:09:46,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:09:46,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 16:09:46,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 16:09:46,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 16:09:46,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420724023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:46,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1955731092] [2022-11-23 16:09:46,450 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:46,450 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:46,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:46,451 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:46,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:46,537 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:46,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9991#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:46,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:46,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:46,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2022-11-23 16:09:46,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621201241] [2022-11-23 16:09:46,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:46,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 16:09:46,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:46,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 16:09:46,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-23 16:09:46,642 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2022-11-23 16:09:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:46,834 INFO L93 Difference]: Finished difference Result 184 states and 244 transitions. [2022-11-23 16:09:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 16:09:46,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 24 [2022-11-23 16:09:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:46,836 INFO L225 Difference]: With dead ends: 184 [2022-11-23 16:09:46,836 INFO L226 Difference]: Without dead ends: 160 [2022-11-23 16:09:46,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-23 16:09:46,837 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:46,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:09:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-23 16:09:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2022-11-23 16:09:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.3307692307692307) internal successors, (173), 130 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 173 transitions. [2022-11-23 16:09:46,912 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 173 transitions. Word has length 24 [2022-11-23 16:09:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:46,912 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 173 transitions. [2022-11-23 16:09:46,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2022-11-23 16:09:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 173 transitions. [2022-11-23 16:09:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 16:09:46,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:46,913 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:46,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:47,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:47,119 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:47,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1323667524, now seen corresponding path program 7 times [2022-11-23 16:09:47,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:47,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116777023] [2022-11-23 16:09:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:47,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:09:47,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:47,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116777023] [2022-11-23 16:09:47,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116777023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:47,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427806651] [2022-11-23 16:09:47,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:09:47,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:47,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:47,426 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:47,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 16:09:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:47,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 16:09:47,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 16:09:47,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 16:09:47,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427806651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:47,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7350801] [2022-11-23 16:09:47,684 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:47,684 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:47,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:47,684 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:47,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:47,776 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:47,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10774#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:47,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:47,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:47,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2022-11-23 16:09:47,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460795935] [2022-11-23 16:09:47,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:47,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 16:09:47,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 16:09:47,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-11-23 16:09:47,970 INFO L87 Difference]: Start difference. First operand 131 states and 173 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:53,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 16:09:56,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:09:56,208 INFO L93 Difference]: Finished difference Result 252 states and 355 transitions. [2022-11-23 16:09:56,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-23 16:09:56,208 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-23 16:09:56,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:09:56,210 INFO L225 Difference]: With dead ends: 252 [2022-11-23 16:09:56,210 INFO L226 Difference]: Without dead ends: 219 [2022-11-23 16:09:56,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=928, Invalid=9172, Unknown=0, NotChecked=0, Total=10100 [2022-11-23 16:09:56,213 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 129 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:09:56,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 89 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 16:09:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-23 16:09:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 170. [2022-11-23 16:09:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.3254437869822486) internal successors, (224), 169 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 224 transitions. [2022-11-23 16:09:56,275 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 224 transitions. Word has length 24 [2022-11-23 16:09:56,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:09:56,275 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 224 transitions. [2022-11-23 16:09:56,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:09:56,275 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 224 transitions. [2022-11-23 16:09:56,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 16:09:56,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:09:56,276 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:09:56,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 16:09:56,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 16:09:56,479 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:09:56,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:09:56,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2034832569, now seen corresponding path program 7 times [2022-11-23 16:09:56,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:09:56,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890984837] [2022-11-23 16:09:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:09:56,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:09:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:09:56,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:09:56,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890984837] [2022-11-23 16:09:56,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890984837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:09:56,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331293944] [2022-11-23 16:09:56,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:09:56,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:09:56,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:09:56,799 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:09:56,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 16:09:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:09:56,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 16:09:56,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:09:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 16:09:57,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:09:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 16:09:57,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331293944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:09:57,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763058768] [2022-11-23 16:09:57,076 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:09:57,076 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:09:57,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:09:57,077 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:09:57,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:09:57,166 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:09:57,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11918#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:09:57,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:09:57,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:09:57,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 23 [2022-11-23 16:09:57,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699594151] [2022-11-23 16:09:57,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:09:57,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 16:09:57,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:09:57,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 16:09:57,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2022-11-23 16:09:57,372 INFO L87 Difference]: Start difference. First operand 170 states and 224 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:03,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:10:03,778 INFO L93 Difference]: Finished difference Result 341 states and 454 transitions. [2022-11-23 16:10:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-23 16:10:03,779 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-23 16:10:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:10:03,780 INFO L225 Difference]: With dead ends: 341 [2022-11-23 16:10:03,781 INFO L226 Difference]: Without dead ends: 291 [2022-11-23 16:10:03,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=712, Invalid=7298, Unknown=0, NotChecked=0, Total=8010 [2022-11-23 16:10:03,783 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 193 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:10:03,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 266 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 16:10:03,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-23 16:10:03,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 165. [2022-11-23 16:10:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.3109756097560976) internal successors, (215), 164 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 215 transitions. [2022-11-23 16:10:03,867 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 215 transitions. Word has length 24 [2022-11-23 16:10:03,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:10:03,868 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 215 transitions. [2022-11-23 16:10:03,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 215 transitions. [2022-11-23 16:10:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 16:10:03,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:10:03,869 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:10:03,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 16:10:04,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 16:10:04,075 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:10:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:10:04,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1600483982, now seen corresponding path program 6 times [2022-11-23 16:10:04,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:10:04,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852871175] [2022-11-23 16:10:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:04,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:10:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 16:10:04,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:10:04,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852871175] [2022-11-23 16:10:04,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852871175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:10:04,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922164317] [2022-11-23 16:10:04,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:10:04,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:04,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:10:04,330 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:10:04,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 16:10:04,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:10:04,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:10:04,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 16:10:04,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:10:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 16:10:04,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:10:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 16:10:04,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922164317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:10:04,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1386585922] [2022-11-23 16:10:04,545 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:10:04,545 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:10:04,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:10:04,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:10:04,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:10:04,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:10:04,792 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13195#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:10:04,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:10:04,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:10:04,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-11-23 16:10:04,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041873211] [2022-11-23 16:10:04,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:10:04,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 16:10:04,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:10:04,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 16:10:04,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-11-23 16:10:04,795 INFO L87 Difference]: Start difference. First operand 165 states and 215 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:05,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:10:05,267 INFO L93 Difference]: Finished difference Result 238 states and 316 transitions. [2022-11-23 16:10:05,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 16:10:05,268 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-23 16:10:05,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:10:05,270 INFO L225 Difference]: With dead ends: 238 [2022-11-23 16:10:05,270 INFO L226 Difference]: Without dead ends: 223 [2022-11-23 16:10:05,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2022-11-23 16:10:05,271 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:10:05,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 25 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:10:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-23 16:10:05,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 215. [2022-11-23 16:10:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.2897196261682242) internal successors, (276), 214 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 276 transitions. [2022-11-23 16:10:05,369 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 276 transitions. Word has length 26 [2022-11-23 16:10:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:10:05,369 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 276 transitions. [2022-11-23 16:10:05,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:05,370 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 276 transitions. [2022-11-23 16:10:05,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 16:10:05,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:10:05,371 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:10:05,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 16:10:05,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 16:10:05,574 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:10:05,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:10:05,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1554131044, now seen corresponding path program 8 times [2022-11-23 16:10:05,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:10:05,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563696957] [2022-11-23 16:10:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:05,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:10:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:10:05,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:10:05,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563696957] [2022-11-23 16:10:05,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563696957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:10:05,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783062617] [2022-11-23 16:10:05,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:10:05,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:05,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:10:05,859 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:10:05,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 16:10:05,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 16:10:05,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:10:05,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 16:10:05,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:10:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 16:10:06,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:10:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 16:10:06,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783062617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:10:06,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602650664] [2022-11-23 16:10:06,614 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:10:06,615 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:10:06,616 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:10:06,616 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:10:06,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:10:06,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:10:06,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14291#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:10:06,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:10:06,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:10:06,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 12] total 34 [2022-11-23 16:10:06,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728867117] [2022-11-23 16:10:06,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:10:06,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 16:10:06,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:10:06,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 16:10:06,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 16:10:06,953 INFO L87 Difference]: Start difference. First operand 215 states and 276 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:10:20,293 INFO L93 Difference]: Finished difference Result 520 states and 717 transitions. [2022-11-23 16:10:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-23 16:10:20,293 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-23 16:10:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:10:20,295 INFO L225 Difference]: With dead ends: 520 [2022-11-23 16:10:20,296 INFO L226 Difference]: Without dead ends: 446 [2022-11-23 16:10:20,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5599 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=2110, Invalid=17630, Unknown=0, NotChecked=0, Total=19740 [2022-11-23 16:10:20,298 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 239 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 3231 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 3778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 3231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:10:20,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 398 Invalid, 3778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 3231 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 16:10:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-23 16:10:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 207. [2022-11-23 16:10:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3640776699029127) internal successors, (281), 206 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 281 transitions. [2022-11-23 16:10:20,436 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 281 transitions. Word has length 26 [2022-11-23 16:10:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:10:20,436 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 281 transitions. [2022-11-23 16:10:20,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 281 transitions. [2022-11-23 16:10:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 16:10:20,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:10:20,437 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:10:20,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-23 16:10:20,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 16:10:20,643 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:10:20,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:10:20,643 INFO L85 PathProgramCache]: Analyzing trace with hash -524531508, now seen corresponding path program 9 times [2022-11-23 16:10:20,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:10:20,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057719874] [2022-11-23 16:10:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:20,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:10:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:10:21,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:10:21,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057719874] [2022-11-23 16:10:21,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057719874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:10:21,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001817690] [2022-11-23 16:10:21,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:10:21,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:21,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:10:21,028 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:10:21,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-23 16:10:21,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:10:21,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:10:21,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 16:10:21,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:10:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 16:10:21,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:10:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 16:10:21,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001817690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:10:21,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039986998] [2022-11-23 16:10:21,357 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:10:21,357 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:10:21,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:10:21,358 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:10:21,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:10:21,457 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:10:21,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16088#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:10:21,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:10:21,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:10:21,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 24 [2022-11-23 16:10:21,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83765656] [2022-11-23 16:10:21,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:10:21,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 16:10:21,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:10:21,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 16:10:21,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-11-23 16:10:21,677 INFO L87 Difference]: Start difference. First operand 207 states and 281 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:10:37,876 INFO L93 Difference]: Finished difference Result 361 states and 515 transitions. [2022-11-23 16:10:37,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-23 16:10:37,876 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-23 16:10:37,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:10:37,877 INFO L225 Difference]: With dead ends: 361 [2022-11-23 16:10:37,877 INFO L226 Difference]: Without dead ends: 310 [2022-11-23 16:10:37,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6294 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=1534, Invalid=17926, Unknown=0, NotChecked=0, Total=19460 [2022-11-23 16:10:37,880 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 214 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:10:37,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 99 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1970 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 16:10:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-23 16:10:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 219. [2022-11-23 16:10:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.3394495412844036) internal successors, (292), 218 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 292 transitions. [2022-11-23 16:10:37,993 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 292 transitions. Word has length 27 [2022-11-23 16:10:37,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:10:37,993 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 292 transitions. [2022-11-23 16:10:37,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 292 transitions. [2022-11-23 16:10:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 16:10:38,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:10:38,001 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:10:38,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-23 16:10:38,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 16:10:38,202 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:10:38,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:10:38,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1311700973, now seen corresponding path program 7 times [2022-11-23 16:10:38,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:10:38,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276601321] [2022-11-23 16:10:38,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:38,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:10:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 16:10:38,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:10:38,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276601321] [2022-11-23 16:10:38,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276601321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:10:38,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322579168] [2022-11-23 16:10:38,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:10:38,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:38,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:10:38,524 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:10:38,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-23 16:10:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:38,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 16:10:38,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:10:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 16:10:38,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:10:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-23 16:10:38,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322579168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:10:38,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [612268182] [2022-11-23 16:10:38,899 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:10:38,899 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:10:38,900 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:10:38,900 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:10:38,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:10:38,985 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:10:39,166 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17638#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:10:39,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:10:39,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:10:39,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 8] total 26 [2022-11-23 16:10:39,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544507306] [2022-11-23 16:10:39,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:10:39,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 16:10:39,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:10:39,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 16:10:39,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-11-23 16:10:39,168 INFO L87 Difference]: Start difference. First operand 219 states and 292 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:40,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:10:40,883 INFO L93 Difference]: Finished difference Result 552 states and 740 transitions. [2022-11-23 16:10:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-23 16:10:40,884 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-23 16:10:40,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:10:40,886 INFO L225 Difference]: With dead ends: 552 [2022-11-23 16:10:40,886 INFO L226 Difference]: Without dead ends: 508 [2022-11-23 16:10:40,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=405, Invalid=1575, Unknown=0, NotChecked=0, Total=1980 [2022-11-23 16:10:40,895 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 242 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:10:40,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 345 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 16:10:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-11-23 16:10:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 268. [2022-11-23 16:10:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.2771535580524345) internal successors, (341), 267 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:41,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 341 transitions. [2022-11-23 16:10:41,101 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 341 transitions. Word has length 27 [2022-11-23 16:10:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:10:41,101 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 341 transitions. [2022-11-23 16:10:41,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:41,102 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 341 transitions. [2022-11-23 16:10:41,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 16:10:41,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:10:41,103 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:10:41,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-23 16:10:41,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-23 16:10:41,308 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:10:41,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:10:41,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1326132748, now seen corresponding path program 8 times [2022-11-23 16:10:41,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:10:41,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546836600] [2022-11-23 16:10:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:41,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:10:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 16:10:41,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:10:41,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546836600] [2022-11-23 16:10:41,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546836600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:10:41,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412827850] [2022-11-23 16:10:41,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:10:41,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:41,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:10:41,606 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:10:41,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-23 16:10:41,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 16:10:41,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:10:41,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 16:10:41,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:10:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 16:10:41,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:10:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 16:10:41,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412827850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:10:41,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97490856] [2022-11-23 16:10:41,835 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:10:41,835 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:10:41,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:10:41,835 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:10:41,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:10:41,921 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:10:42,041 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19429#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:10:42,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:10:42,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:10:42,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 10 [2022-11-23 16:10:42,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947190912] [2022-11-23 16:10:42,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:10:42,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 16:10:42,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:10:42,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 16:10:42,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-23 16:10:42,042 INFO L87 Difference]: Start difference. First operand 268 states and 341 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:42,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:10:42,376 INFO L93 Difference]: Finished difference Result 328 states and 421 transitions. [2022-11-23 16:10:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 16:10:42,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-23 16:10:42,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:10:42,378 INFO L225 Difference]: With dead ends: 328 [2022-11-23 16:10:42,379 INFO L226 Difference]: Without dead ends: 300 [2022-11-23 16:10:42,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-23 16:10:42,380 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:10:42,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:10:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-23 16:10:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 256. [2022-11-23 16:10:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.2823529411764707) internal successors, (327), 255 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 327 transitions. [2022-11-23 16:10:42,526 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 327 transitions. Word has length 29 [2022-11-23 16:10:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:10:42,526 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 327 transitions. [2022-11-23 16:10:42,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:10:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 327 transitions. [2022-11-23 16:10:42,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 16:10:42,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:10:42,528 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:10:42,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-23 16:10:42,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:42,728 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:10:42,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:10:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2135271873, now seen corresponding path program 8 times [2022-11-23 16:10:42,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:10:42,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747408217] [2022-11-23 16:10:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:10:42,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:10:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:10:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 16:10:43,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:10:43,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747408217] [2022-11-23 16:10:43,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747408217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:10:43,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208352126] [2022-11-23 16:10:43,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:10:43,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:10:43,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:10:43,051 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:10:43,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-23 16:10:43,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 16:10:43,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:10:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 16:10:43,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:10:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-23 16:10:43,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:10:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-23 16:10:43,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208352126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:10:43,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1333681748] [2022-11-23 16:10:43,645 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:10:43,645 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:10:43,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:10:43,645 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:10:43,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:10:43,727 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:10:43,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20790#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:10:43,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:10:43,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:10:43,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2022-11-23 16:10:43,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608599360] [2022-11-23 16:10:43,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:10:43,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 16:10:43,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:10:43,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 16:10:43,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 16:10:43,948 INFO L87 Difference]: Start difference. First operand 256 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:11:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:05,460 INFO L93 Difference]: Finished difference Result 720 states and 964 transitions. [2022-11-23 16:11:05,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-11-23 16:11:05,460 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-23 16:11:05,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:05,463 INFO L225 Difference]: With dead ends: 720 [2022-11-23 16:11:05,463 INFO L226 Difference]: Without dead ends: 629 [2022-11-23 16:11:05,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9811 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=2850, Invalid=26562, Unknown=0, NotChecked=0, Total=29412 [2022-11-23 16:11:05,467 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 458 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 2259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:05,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 292 Invalid, 2259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 16:11:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-23 16:11:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 277. [2022-11-23 16:11:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.3405797101449275) internal successors, (370), 276 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:11:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 370 transitions. [2022-11-23 16:11:05,618 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 370 transitions. Word has length 29 [2022-11-23 16:11:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:05,619 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 370 transitions. [2022-11-23 16:11:05,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:11:05,619 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 370 transitions. [2022-11-23 16:11:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 16:11:05,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:05,620 INFO L195 NwaCegarLoop]: trace histogram [11, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:05,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-23 16:11:05,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:05,823 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash 473554829, now seen corresponding path program 10 times [2022-11-23 16:11:05,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:05,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770589515] [2022-11-23 16:11:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:05,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 16:11:06,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:06,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770589515] [2022-11-23 16:11:06,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770589515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:11:06,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499120517] [2022-11-23 16:11:06,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:11:06,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:06,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:11:06,156 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:11:06,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-23 16:11:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:06,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 16:11:06,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:11:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 16:11:06,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:11:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-23 16:11:06,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499120517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:11:06,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824169441] [2022-11-23 16:11:06,660 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:11:06,660 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:11:06,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:11:06,660 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:11:06,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:11:06,747 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:11:06,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23235#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:11:06,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:11:06,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:11:06,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 10] total 30 [2022-11-23 16:11:06,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225975195] [2022-11-23 16:11:06,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:11:06,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 16:11:06,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:06,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 16:11:06,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 16:11:06,950 INFO L87 Difference]: Start difference. First operand 277 states and 370 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:11:11,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:11,799 INFO L93 Difference]: Finished difference Result 493 states and 655 transitions. [2022-11-23 16:11:11,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-23 16:11:11,799 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-23 16:11:11,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:11,800 INFO L225 Difference]: With dead ends: 493 [2022-11-23 16:11:11,800 INFO L226 Difference]: Without dead ends: 378 [2022-11-23 16:11:11,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=594, Invalid=6716, Unknown=0, NotChecked=0, Total=7310 [2022-11-23 16:11:11,802 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 161 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:11,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 370 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 16:11:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-23 16:11:11,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 241. [2022-11-23 16:11:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.4) internal successors, (336), 240 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:11:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 336 transitions. [2022-11-23 16:11:11,949 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 336 transitions. Word has length 29 [2022-11-23 16:11:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:11,950 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 336 transitions. [2022-11-23 16:11:11,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:11:11,950 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 336 transitions. [2022-11-23 16:11:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 16:11:11,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:11,951 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:11,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-23 16:11:12,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:12,159 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:12,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:12,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1114080068, now seen corresponding path program 11 times [2022-11-23 16:11:12,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:12,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967319478] [2022-11-23 16:11:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:12,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:11:12,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:12,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967319478] [2022-11-23 16:11:12,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967319478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:11:12,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025278538] [2022-11-23 16:11:12,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:11:12,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:12,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:11:12,593 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:11:12,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-23 16:11:12,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 16:11:12,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:11:12,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 16:11:12,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:11:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 16:11:13,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:11:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-23 16:11:13,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025278538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:11:13,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1253420938] [2022-11-23 16:11:13,107 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:11:13,108 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:11:13,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:11:13,108 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:11:13,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:11:13,201 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:11:13,419 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24952#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:11:13,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:11:13,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:11:13,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2022-11-23 16:11:13,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113515368] [2022-11-23 16:11:13,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:11:13,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 16:11:13,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:13,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 16:11:13,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-11-23 16:11:13,422 INFO L87 Difference]: Start difference. First operand 241 states and 336 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:11:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:36,337 INFO L93 Difference]: Finished difference Result 409 states and 595 transitions. [2022-11-23 16:11:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-23 16:11:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-23 16:11:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:36,338 INFO L225 Difference]: With dead ends: 409 [2022-11-23 16:11:36,338 INFO L226 Difference]: Without dead ends: 351 [2022-11-23 16:11:36,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3680 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=1330, Invalid=12242, Unknown=0, NotChecked=0, Total=13572 [2022-11-23 16:11:36,340 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 109 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:36,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 84 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1613 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 16:11:36,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-23 16:11:36,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 291. [2022-11-23 16:11:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.3310344827586207) internal successors, (386), 290 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:11:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 386 transitions. [2022-11-23 16:11:36,518 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 386 transitions. Word has length 30 [2022-11-23 16:11:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:36,518 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 386 transitions. [2022-11-23 16:11:36,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:11:36,518 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 386 transitions. [2022-11-23 16:11:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 16:11:36,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:36,519 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:36,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-23 16:11:36,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-23 16:11:36,723 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:36,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:36,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2077061618, now seen corresponding path program 12 times [2022-11-23 16:11:36,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:36,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951037567] [2022-11-23 16:11:36,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:36,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 16:11:37,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:37,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951037567] [2022-11-23 16:11:37,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951037567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:11:37,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547776803] [2022-11-23 16:11:37,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:11:37,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:37,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:11:37,125 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:11:37,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-23 16:11:37,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:11:37,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:11:37,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-23 16:11:37,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:11:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:11:37,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:11:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-23 16:11:38,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547776803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:11:38,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [155303494] [2022-11-23 16:11:38,294 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:11:38,294 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:11:38,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:11:38,295 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:11:38,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:11:38,384 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:11:38,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26745#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:11:38,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:11:38,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:11:38,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26, 15] total 45 [2022-11-23 16:11:38,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124831511] [2022-11-23 16:11:38,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:11:38,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-23 16:11:38,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:38,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-23 16:11:38,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 16:11:38,648 INFO L87 Difference]: Start difference. First operand 291 states and 386 transitions. Second operand has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:11:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:11:55,961 INFO L93 Difference]: Finished difference Result 705 states and 976 transitions. [2022-11-23 16:11:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-11-23 16:11:55,962 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-23 16:11:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:11:55,965 INFO L225 Difference]: With dead ends: 705 [2022-11-23 16:11:55,965 INFO L226 Difference]: Without dead ends: 653 [2022-11-23 16:11:55,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7315 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=2554, Invalid=20398, Unknown=0, NotChecked=0, Total=22952 [2022-11-23 16:11:55,967 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 208 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 4239 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 4737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 4239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:11:55,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 485 Invalid, 4737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 4239 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-23 16:11:55,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-11-23 16:11:56,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 296. [2022-11-23 16:11:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.4) internal successors, (413), 295 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:11:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 413 transitions. [2022-11-23 16:11:56,215 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 413 transitions. Word has length 32 [2022-11-23 16:11:56,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:11:56,215 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 413 transitions. [2022-11-23 16:11:56,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:11:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 413 transitions. [2022-11-23 16:11:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 16:11:56,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:11:56,216 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:11:56,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-23 16:11:56,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:56,417 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:11:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:11:56,417 INFO L85 PathProgramCache]: Analyzing trace with hash 824157404, now seen corresponding path program 13 times [2022-11-23 16:11:56,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:11:56,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350258125] [2022-11-23 16:11:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:11:56,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:11:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 16:11:56,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:11:56,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350258125] [2022-11-23 16:11:56,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350258125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:11:56,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918499027] [2022-11-23 16:11:56,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:11:56,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:11:56,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:11:56,803 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:11:56,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-23 16:11:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:11:56,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 16:11:56,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:11:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 16:11:57,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:11:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 16:11:57,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918499027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:11:57,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [3841240] [2022-11-23 16:11:57,195 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:11:57,195 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:11:57,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:11:57,196 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:11:57,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:11:57,288 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:11:57,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29124#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:11:57,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:11:57,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:11:57,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2022-11-23 16:11:57,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007792080] [2022-11-23 16:11:57,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:11:57,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 16:11:57,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:11:57,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 16:11:57,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-11-23 16:11:57,509 INFO L87 Difference]: Start difference. First operand 296 states and 413 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:07,585 INFO L93 Difference]: Finished difference Result 476 states and 634 transitions. [2022-11-23 16:12:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-23 16:12:07,585 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-23 16:12:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:07,587 INFO L225 Difference]: With dead ends: 476 [2022-11-23 16:12:07,587 INFO L226 Difference]: Without dead ends: 411 [2022-11-23 16:12:07,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=785, Invalid=7225, Unknown=0, NotChecked=0, Total=8010 [2022-11-23 16:12:07,588 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:07,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 255 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 16:12:07,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-11-23 16:12:07,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 299. [2022-11-23 16:12:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.3859060402684564) internal successors, (413), 298 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 413 transitions. [2022-11-23 16:12:07,836 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 413 transitions. Word has length 33 [2022-11-23 16:12:07,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:07,836 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 413 transitions. [2022-11-23 16:12:07,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:07,836 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 413 transitions. [2022-11-23 16:12:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 16:12:07,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:07,839 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:07,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:08,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-23 16:12:08,045 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:12:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash -121570228, now seen corresponding path program 14 times [2022-11-23 16:12:08,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:08,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015642865] [2022-11-23 16:12:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:08,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:12:08,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:08,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015642865] [2022-11-23 16:12:08,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015642865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:12:08,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678289623] [2022-11-23 16:12:08,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:12:08,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:08,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:08,526 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:08,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-23 16:12:08,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 16:12:08,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:12:08,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-23 16:12:08,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:12:08,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 16:12:09,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678289623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:09,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [349878436] [2022-11-23 16:12:09,070 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:12:09,071 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:12:09,071 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:12:09,071 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:12:09,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:12:09,168 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:12:09,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30991#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:12:09,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:12:09,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:12:09,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 11] total 30 [2022-11-23 16:12:09,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449135851] [2022-11-23 16:12:09,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:12:09,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 16:12:09,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:09,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 16:12:09,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 16:12:09,401 INFO L87 Difference]: Start difference. First operand 299 states and 413 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:17,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:17,443 INFO L93 Difference]: Finished difference Result 774 states and 1131 transitions. [2022-11-23 16:12:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-23 16:12:17,443 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-23 16:12:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:17,444 INFO L225 Difference]: With dead ends: 774 [2022-11-23 16:12:17,445 INFO L226 Difference]: Without dead ends: 709 [2022-11-23 16:12:17,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3245 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2333, Invalid=11709, Unknown=0, NotChecked=0, Total=14042 [2022-11-23 16:12:17,446 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 206 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:17,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 129 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 16:12:17,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-11-23 16:12:17,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 337. [2022-11-23 16:12:17,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.4166666666666667) internal successors, (476), 336 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 476 transitions. [2022-11-23 16:12:17,746 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 476 transitions. Word has length 33 [2022-11-23 16:12:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:17,746 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 476 transitions. [2022-11-23 16:12:17,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 476 transitions. [2022-11-23 16:12:17,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 16:12:17,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:17,747 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:17,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:17,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-23 16:12:17,947 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:12:17,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:17,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1686717663, now seen corresponding path program 9 times [2022-11-23 16:12:17,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:17,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612801604] [2022-11-23 16:12:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:17,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 16:12:18,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:18,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612801604] [2022-11-23 16:12:18,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612801604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:12:18,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541802720] [2022-11-23 16:12:18,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:12:18,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:18,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:18,381 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:18,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-23 16:12:18,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:12:18,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:12:18,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 16:12:18,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 16:12:18,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-23 16:12:18,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541802720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:18,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1947728341] [2022-11-23 16:12:18,970 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:12:18,970 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:12:18,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:12:18,970 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:12:18,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:12:19,047 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:12:19,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33596#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:12:19,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:12:19,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:12:19,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 10] total 33 [2022-11-23 16:12:19,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050931394] [2022-11-23 16:12:19,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:12:19,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 16:12:19,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:19,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 16:12:19,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 16:12:19,271 INFO L87 Difference]: Start difference. First operand 337 states and 476 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:22,868 INFO L93 Difference]: Finished difference Result 865 states and 1170 transitions. [2022-11-23 16:12:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-23 16:12:22,868 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-23 16:12:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:22,871 INFO L225 Difference]: With dead ends: 865 [2022-11-23 16:12:22,871 INFO L226 Difference]: Without dead ends: 811 [2022-11-23 16:12:22,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=821, Invalid=2961, Unknown=0, NotChecked=0, Total=3782 [2022-11-23 16:12:22,872 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 358 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:22,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 577 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 2170 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 16:12:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-11-23 16:12:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 423. [2022-11-23 16:12:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.3436018957345972) internal successors, (567), 422 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 567 transitions. [2022-11-23 16:12:23,357 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 567 transitions. Word has length 33 [2022-11-23 16:12:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:23,357 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 567 transitions. [2022-11-23 16:12:23,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 567 transitions. [2022-11-23 16:12:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 16:12:23,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:23,359 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:23,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:23,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-23 16:12:23,559 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:12:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2110658808, now seen corresponding path program 15 times [2022-11-23 16:12:23,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:23,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866350853] [2022-11-23 16:12:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:23,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-23 16:12:23,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:23,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866350853] [2022-11-23 16:12:23,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866350853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:12:23,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419307186] [2022-11-23 16:12:23,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:12:23,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:23,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:23,989 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:24,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-23 16:12:24,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:12:24,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:12:24,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-23 16:12:24,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-23 16:12:24,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 16:12:25,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419307186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:25,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [248325789] [2022-11-23 16:12:25,267 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:12:25,267 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:12:25,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:12:25,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:12:25,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:12:25,373 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:12:25,666 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36399#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:12:25,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:12:25,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:12:25,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 22] total 50 [2022-11-23 16:12:25,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885392440] [2022-11-23 16:12:25,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:12:25,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-23 16:12:25,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:25,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-23 16:12:25,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2640, Unknown=0, NotChecked=0, Total=2970 [2022-11-23 16:12:25,668 INFO L87 Difference]: Start difference. First operand 423 states and 567 transitions. Second operand has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:13:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:13:15,454 INFO L93 Difference]: Finished difference Result 820 states and 1039 transitions. [2022-11-23 16:13:15,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-11-23 16:13:15,455 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-23 16:13:15,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:13:15,458 INFO L225 Difference]: With dead ends: 820 [2022-11-23 16:13:15,458 INFO L226 Difference]: Without dead ends: 686 [2022-11-23 16:13:15,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4498 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=1190, Invalid=16366, Unknown=0, NotChecked=0, Total=17556 [2022-11-23 16:13:15,460 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 289 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 3048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:13:15,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 468 Invalid, 3048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-23 16:13:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-11-23 16:13:15,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 456. [2022-11-23 16:13:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.3208791208791208) internal successors, (601), 455 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:13:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 601 transitions. [2022-11-23 16:13:15,875 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 601 transitions. Word has length 35 [2022-11-23 16:13:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:13:15,876 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 601 transitions. [2022-11-23 16:13:15,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:13:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 601 transitions. [2022-11-23 16:13:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 16:13:15,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:13:15,877 INFO L195 NwaCegarLoop]: trace histogram [14, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:13:15,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-23 16:13:16,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-23 16:13:16,083 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:13:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:13:16,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1776513891, now seen corresponding path program 10 times [2022-11-23 16:13:16,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:13:16,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411139763] [2022-11-23 16:13:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:13:16,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:13:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:13:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 16:13:16,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:13:16,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411139763] [2022-11-23 16:13:16,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411139763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:13:16,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547108893] [2022-11-23 16:13:16,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:13:16,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:16,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:13:16,516 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:13:16,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-23 16:13:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:13:16,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-23 16:13:16,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:13:17,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-23 16:13:17,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547108893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:13:17,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20736001] [2022-11-23 16:13:17,759 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:13:17,760 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:13:17,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:13:17,760 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:13:17,760 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:13:17,853 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:13:18,155 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39299#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:13:18,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:13:18,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:13:18,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 16] total 49 [2022-11-23 16:13:18,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886482692] [2022-11-23 16:13:18,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:13:18,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 16:13:18,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:13:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 16:13:18,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=2451, Unknown=0, NotChecked=0, Total=2862 [2022-11-23 16:13:18,158 INFO L87 Difference]: Start difference. First operand 456 states and 601 transitions. Second operand has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:13:42,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:13:42,156 INFO L93 Difference]: Finished difference Result 1066 states and 1428 transitions. [2022-11-23 16:13:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-11-23 16:13:42,156 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-23 16:13:42,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:13:42,159 INFO L225 Difference]: With dead ends: 1066 [2022-11-23 16:13:42,159 INFO L226 Difference]: Without dead ends: 924 [2022-11-23 16:13:42,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11928 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=3382, Invalid=31774, Unknown=0, NotChecked=0, Total=35156 [2022-11-23 16:13:42,161 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 239 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 5457 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 6112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 5457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:13:42,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 617 Invalid, 6112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 5457 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-23 16:13:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-23 16:13:42,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 465. [2022-11-23 16:13:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 1.3599137931034482) internal successors, (631), 464 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:13:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 631 transitions. [2022-11-23 16:13:42,759 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 631 transitions. Word has length 35 [2022-11-23 16:13:42,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:13:42,759 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 631 transitions. [2022-11-23 16:13:42,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:13:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 631 transitions. [2022-11-23 16:13:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 16:13:42,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:13:42,761 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:13:42,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-23 16:13:42,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-23 16:13:42,966 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:13:42,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:13:42,966 INFO L85 PathProgramCache]: Analyzing trace with hash 397093308, now seen corresponding path program 16 times [2022-11-23 16:13:42,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:13:42,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615811797] [2022-11-23 16:13:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:13:42,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:13:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:13:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:13:43,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:13:43,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615811797] [2022-11-23 16:13:43,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615811797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:13:43,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304851451] [2022-11-23 16:13:43,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:13:43,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:43,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:13:43,513 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:13:43,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-23 16:13:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:13:43,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 16:13:43,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-23 16:13:43,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-23 16:13:44,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304851451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:13:44,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [826197045] [2022-11-23 16:13:44,011 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:13:44,011 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:13:44,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:13:44,011 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:13:44,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:13:44,089 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:13:44,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42817#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:13:44,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:13:44,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:13:44,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 33 [2022-11-23 16:13:44,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205263557] [2022-11-23 16:13:44,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:13:44,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 16:13:44,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:13:44,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 16:13:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 16:13:44,347 INFO L87 Difference]: Start difference. First operand 465 states and 631 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:15:48,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 16:16:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:16:07,083 INFO L93 Difference]: Finished difference Result 774 states and 1119 transitions. [2022-11-23 16:16:07,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-23 16:16:07,083 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-23 16:16:07,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:16:07,085 INFO L225 Difference]: With dead ends: 774 [2022-11-23 16:16:07,085 INFO L226 Difference]: Without dead ends: 700 [2022-11-23 16:16:07,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17710 ImplicationChecksByTransitivity, 131.3s TimeCoverageRelationStatistics Valid=3438, Invalid=46961, Unknown=1, NotChecked=0, Total=50400 [2022-11-23 16:16:07,087 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 411 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4746 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 5116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 4746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:16:07,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 188 Invalid, 5116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 4746 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-11-23 16:16:07,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-11-23 16:16:07,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 511. [2022-11-23 16:16:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.3490196078431373) internal successors, (688), 510 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:16:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 688 transitions. [2022-11-23 16:16:07,701 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 688 transitions. Word has length 36 [2022-11-23 16:16:07,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:16:07,701 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 688 transitions. [2022-11-23 16:16:07,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:16:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 688 transitions. [2022-11-23 16:16:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 16:16:07,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:16:07,703 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:16:07,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-23 16:16:07,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-23 16:16:07,914 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:16:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:16:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1634681185, now seen corresponding path program 11 times [2022-11-23 16:16:07,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:16:07,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838362578] [2022-11-23 16:16:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:16:07,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:16:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:16:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 16:16:08,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:16:08,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838362578] [2022-11-23 16:16:08,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838362578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:16:08,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098309120] [2022-11-23 16:16:08,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:16:08,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:16:08,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:16:08,387 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:16:08,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-23 16:16:08,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 16:16:08,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:16:08,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 16:16:08,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:16:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-23 16:16:08,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:16:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-23 16:16:08,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098309120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:16:08,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1442369694] [2022-11-23 16:16:08,741 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:16:08,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:16:08,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:16:08,741 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:16:08,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:16:08,834 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:16:09,058 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45992#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:16:09,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:16:09,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:16:09,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8, 8] total 29 [2022-11-23 16:16:09,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418105254] [2022-11-23 16:16:09,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:16:09,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 16:16:09,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:16:09,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 16:16:09,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 16:16:09,060 INFO L87 Difference]: Start difference. First operand 511 states and 688 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:16:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:16:29,747 INFO L93 Difference]: Finished difference Result 1365 states and 1821 transitions. [2022-11-23 16:16:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-11-23 16:16:29,747 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-23 16:16:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:16:29,751 INFO L225 Difference]: With dead ends: 1365 [2022-11-23 16:16:29,751 INFO L226 Difference]: Without dead ends: 1192 [2022-11-23 16:16:29,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13283 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=2240, Invalid=35590, Unknown=0, NotChecked=0, Total=37830 [2022-11-23 16:16:29,755 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 177 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 4794 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 5096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 4794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:16:29,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 553 Invalid, 5096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 4794 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-23 16:16:29,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2022-11-23 16:16:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 591. [2022-11-23 16:16:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.3152542372881355) internal successors, (776), 590 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:16:30,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 776 transitions. [2022-11-23 16:16:30,524 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 776 transitions. Word has length 37 [2022-11-23 16:16:30,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:16:30,524 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 776 transitions. [2022-11-23 16:16:30,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:16:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 776 transitions. [2022-11-23 16:16:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 16:16:30,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:16:30,526 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:16:30,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-23 16:16:30,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:16:30,732 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:16:30,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:16:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1092529570, now seen corresponding path program 17 times [2022-11-23 16:16:30,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:16:30,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412203245] [2022-11-23 16:16:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:16:30,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:16:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:16:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-23 16:16:31,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:16:31,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412203245] [2022-11-23 16:16:31,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412203245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:16:31,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582882331] [2022-11-23 16:16:31,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:16:31,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:16:31,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:16:31,173 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:16:31,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-23 16:16:31,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 16:16:31,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:16:31,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 16:16:31,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:16:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 16:16:31,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:16:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 16:16:31,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582882331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:16:31,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1507167513] [2022-11-23 16:16:31,968 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:16:31,968 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:16:31,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:16:31,969 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:16:31,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:16:32,054 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:16:32,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50431#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:16:32,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:16:32,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:16:32,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 37 [2022-11-23 16:16:32,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144630147] [2022-11-23 16:16:32,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:16:32,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-23 16:16:32,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:16:32,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-23 16:16:32,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 16:16:32,321 INFO L87 Difference]: Start difference. First operand 591 states and 776 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:17:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:17:18,859 INFO L93 Difference]: Finished difference Result 1186 states and 1546 transitions. [2022-11-23 16:17:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-11-23 16:17:18,860 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-23 16:17:18,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:17:18,863 INFO L225 Difference]: With dead ends: 1186 [2022-11-23 16:17:18,863 INFO L226 Difference]: Without dead ends: 1086 [2022-11-23 16:17:18,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19119 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=4474, Invalid=48196, Unknown=0, NotChecked=0, Total=52670 [2022-11-23 16:17:18,866 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 474 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 2831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:17:18,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 356 Invalid, 2831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-23 16:17:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-11-23 16:17:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 642. [2022-11-23 16:17:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.3354134165366616) internal successors, (856), 641 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:17:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 856 transitions. [2022-11-23 16:17:19,571 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 856 transitions. Word has length 38 [2022-11-23 16:17:19,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:17:19,571 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 856 transitions. [2022-11-23 16:17:19,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:17:19,572 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 856 transitions. [2022-11-23 16:17:19,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 16:17:19,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:17:19,573 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:17:19,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-23 16:17:19,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:17:19,784 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:17:19,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:17:19,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1064896814, now seen corresponding path program 12 times [2022-11-23 16:17:19,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:17:19,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250526642] [2022-11-23 16:17:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:17:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:17:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:17:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 16:17:20,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:17:20,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250526642] [2022-11-23 16:17:20,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250526642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:17:20,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477887988] [2022-11-23 16:17:20,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:17:20,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:17:20,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:17:20,295 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:17:20,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-23 16:17:20,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:17:20,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:17:20,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-23 16:17:20,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:17:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:17:20,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:17:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-23 16:17:21,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477887988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:17:21,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405867853] [2022-11-23 16:17:21,714 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:17:21,714 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:17:21,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:17:21,715 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:17:21,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:17:21,801 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:17:22,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54711#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:17:22,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:17:22,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:17:22,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31, 16] total 51 [2022-11-23 16:17:22,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835825940] [2022-11-23 16:17:22,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:17:22,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 16:17:22,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:17:22,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 16:17:22,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2659, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 16:17:22,144 INFO L87 Difference]: Start difference. First operand 642 states and 856 transitions. Second operand has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:17:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:17:46,971 INFO L93 Difference]: Finished difference Result 1460 states and 1945 transitions. [2022-11-23 16:17:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-11-23 16:17:46,971 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-23 16:17:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:17:46,973 INFO L225 Difference]: With dead ends: 1460 [2022-11-23 16:17:46,973 INFO L226 Difference]: Without dead ends: 1243 [2022-11-23 16:17:46,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12569 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=3290, Invalid=34152, Unknown=0, NotChecked=0, Total=37442 [2022-11-23 16:17:46,977 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 204 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 5424 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 6090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 5424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:17:46,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 665 Invalid, 6090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 5424 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-23 16:17:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-11-23 16:17:47,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 659. [2022-11-23 16:17:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 1.3693009118541033) internal successors, (901), 658 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:17:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 901 transitions. [2022-11-23 16:17:47,768 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 901 transitions. Word has length 38 [2022-11-23 16:17:47,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:17:47,768 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 901 transitions. [2022-11-23 16:17:47,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:17:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 901 transitions. [2022-11-23 16:17:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 16:17:47,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:17:47,770 INFO L195 NwaCegarLoop]: trace histogram [17, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:17:47,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-23 16:17:47,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:17:47,980 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:17:47,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:17:47,980 INFO L85 PathProgramCache]: Analyzing trace with hash -307222280, now seen corresponding path program 13 times [2022-11-23 16:17:47,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:17:47,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487304161] [2022-11-23 16:17:47,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:17:47,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:17:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:17:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 16:17:48,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:17:48,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487304161] [2022-11-23 16:17:48,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487304161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:17:48,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409306642] [2022-11-23 16:17:48,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:17:48,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:17:48,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:17:48,539 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:17:48,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-23 16:17:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:17:48,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-23 16:17:48,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:17:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 16:17:48,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:17:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-11-23 16:17:49,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409306642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:17:49,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1948116852] [2022-11-23 16:17:49,272 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:17:49,272 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:17:49,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:17:49,273 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:17:49,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:17:49,346 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:17:49,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59444#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:17:49,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:17:49,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:17:49,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 12] total 40 [2022-11-23 16:17:49,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831623706] [2022-11-23 16:17:49,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:17:49,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-23 16:17:49,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:17:49,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-23 16:17:49,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1795, Unknown=0, NotChecked=0, Total=1980 [2022-11-23 16:17:49,623 INFO L87 Difference]: Start difference. First operand 659 states and 901 transitions. Second operand has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:18:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:18:08,954 INFO L93 Difference]: Finished difference Result 1417 states and 1873 transitions. [2022-11-23 16:18:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-11-23 16:18:08,954 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-23 16:18:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:18:08,956 INFO L225 Difference]: With dead ends: 1417 [2022-11-23 16:18:08,956 INFO L226 Difference]: Without dead ends: 1125 [2022-11-23 16:18:08,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7164 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1243, Invalid=22937, Unknown=0, NotChecked=0, Total=24180 [2022-11-23 16:18:08,958 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 259 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 4090 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 4401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 4090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:18:08,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 918 Invalid, 4401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 4090 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-23 16:18:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-11-23 16:18:09,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 728. [2022-11-23 16:18:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 1.3356258596973865) internal successors, (971), 727 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:18:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 971 transitions. [2022-11-23 16:18:09,751 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 971 transitions. Word has length 40 [2022-11-23 16:18:09,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:18:09,751 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 971 transitions. [2022-11-23 16:18:09,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:18:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 971 transitions. [2022-11-23 16:18:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 16:18:09,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:18:09,753 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:18:09,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-23 16:18:09,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-23 16:18:09,959 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:18:09,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:18:09,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1084705188, now seen corresponding path program 18 times [2022-11-23 16:18:09,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:18:09,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286217620] [2022-11-23 16:18:09,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:18:09,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:18:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:18:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-23 16:18:10,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:18:10,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286217620] [2022-11-23 16:18:10,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286217620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:18:10,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48034506] [2022-11-23 16:18:10,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:18:10,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:18:10,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:18:10,480 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:18:10,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-23 16:18:10,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:18:10,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:18:10,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 16:18:10,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:18:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-23 16:18:10,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:18:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-23 16:18:11,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48034506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:18:11,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837279939] [2022-11-23 16:18:11,041 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:18:11,041 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:18:11,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:18:11,041 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:18:11,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:18:11,118 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:18:11,392 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64157#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:18:11,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:18:11,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:18:11,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 33 [2022-11-23 16:18:11,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474540840] [2022-11-23 16:18:11,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:18:11,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 16:18:11,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:18:11,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 16:18:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 16:18:11,394 INFO L87 Difference]: Start difference. First operand 728 states and 971 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:18:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:18:46,433 INFO L93 Difference]: Finished difference Result 1007 states and 1310 transitions. [2022-11-23 16:18:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-23 16:18:46,434 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-23 16:18:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:18:46,436 INFO L225 Difference]: With dead ends: 1007 [2022-11-23 16:18:46,436 INFO L226 Difference]: Without dead ends: 941 [2022-11-23 16:18:46,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4901 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=1435, Invalid=16387, Unknown=0, NotChecked=0, Total=17822 [2022-11-23 16:18:46,438 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 230 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 2477 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 2477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:18:46,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 440 Invalid, 2717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 2477 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-23 16:18:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-11-23 16:18:47,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 780. [2022-11-23 16:18:47,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 1.3170731707317074) internal successors, (1026), 779 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:18:47,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1026 transitions. [2022-11-23 16:18:47,316 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1026 transitions. Word has length 41 [2022-11-23 16:18:47,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:18:47,316 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 1026 transitions. [2022-11-23 16:18:47,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:18:47,316 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1026 transitions. [2022-11-23 16:18:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 16:18:47,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:18:47,318 INFO L195 NwaCegarLoop]: trace histogram [18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:18:47,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-23 16:18:47,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:18:47,523 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:18:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:18:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1965691523, now seen corresponding path program 14 times [2022-11-23 16:18:47,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:18:47,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989158568] [2022-11-23 16:18:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:18:47,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:18:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:18:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 16:18:48,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:18:48,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989158568] [2022-11-23 16:18:48,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989158568] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:18:48,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591689120] [2022-11-23 16:18:48,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:18:48,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:18:48,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:18:48,110 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:18:48,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-23 16:18:48,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 16:18:48,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:18:48,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-23 16:18:48,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:18:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-11-23 16:18:48,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:18:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-11-23 16:18:49,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591689120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:18:49,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892029247] [2022-11-23 16:18:49,524 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:18:49,524 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:18:49,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:18:49,524 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:18:49,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:18:49,604 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:18:49,942 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68189#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:18:49,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:18:49,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:18:49,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 17] total 51 [2022-11-23 16:18:49,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495544314] [2022-11-23 16:18:49,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:18:49,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 16:18:49,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:18:49,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 16:18:49,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2841, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 16:18:49,944 INFO L87 Difference]: Start difference. First operand 780 states and 1026 transitions. Second operand has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:19:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:19:33,740 INFO L93 Difference]: Finished difference Result 1665 states and 2185 transitions. [2022-11-23 16:19:33,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-11-23 16:19:33,740 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-23 16:19:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:19:33,744 INFO L225 Difference]: With dead ends: 1665 [2022-11-23 16:19:33,744 INFO L226 Difference]: Without dead ends: 1350 [2022-11-23 16:19:33,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23079 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=5202, Invalid=65820, Unknown=0, NotChecked=0, Total=71022 [2022-11-23 16:19:33,747 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 370 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 8054 mSolverCounterSat, 1436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 9490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1436 IncrementalHoareTripleChecker+Valid, 8054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:19:33,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 1048 Invalid, 9490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1436 Valid, 8054 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-23 16:19:33,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-11-23 16:19:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 705. [2022-11-23 16:19:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 1.3607954545454546) internal successors, (958), 704 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:19:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 958 transitions. [2022-11-23 16:19:34,636 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 958 transitions. Word has length 41 [2022-11-23 16:19:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:19:34,636 INFO L495 AbstractCegarLoop]: Abstraction has 705 states and 958 transitions. [2022-11-23 16:19:34,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:19:34,637 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 958 transitions. [2022-11-23 16:19:34,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 16:19:34,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:19:34,638 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:19:34,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-23 16:19:34,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-23 16:19:34,852 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:19:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:19:34,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1073319438, now seen corresponding path program 19 times [2022-11-23 16:19:34,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:19:34,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092328875] [2022-11-23 16:19:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:34,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:19:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:19:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 16:19:35,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:19:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092328875] [2022-11-23 16:19:35,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092328875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:19:35,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939137532] [2022-11-23 16:19:35,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:19:35,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:19:35,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:19:35,457 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:19:35,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-23 16:19:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:19:35,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 16:19:35,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-23 16:19:35,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-23 16:19:36,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939137532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:19:36,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [886335318] [2022-11-23 16:19:36,040 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:19:36,040 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:19:36,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:19:36,040 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:19:36,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:19:36,114 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:19:36,396 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73571#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:19:36,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:19:36,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:19:36,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 36 [2022-11-23 16:19:36,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696185950] [2022-11-23 16:19:36,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:19:36,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-23 16:19:36,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:19:36,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-23 16:19:36,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 16:19:36,398 INFO L87 Difference]: Start difference. First operand 705 states and 958 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:21:22,408 WARN L837 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~z~0#1| 3) (<= |c_ULTIMATE.start_main_~y~0#1| 2) (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 5) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 6) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967295) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967293) 4294967296)) (<= 2 |c_ULTIMATE.start_main_~y~0#1|) (< 0 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967294) 4294967296)) (<= 3 |c_ULTIMATE.start_main_~z~0#1|)) is different from false [2022-11-23 16:22:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:22:36,949 INFO L93 Difference]: Finished difference Result 1112 states and 1579 transitions. [2022-11-23 16:22:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2022-11-23 16:22:36,950 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 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 42 [2022-11-23 16:22:36,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:22:36,951 INFO L225 Difference]: With dead ends: 1112 [2022-11-23 16:22:36,951 INFO L226 Difference]: Without dead ends: 992 [2022-11-23 16:22:36,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21081 ImplicationChecksByTransitivity, 168.5s TimeCoverageRelationStatistics Valid=4141, Invalid=55154, Unknown=1, NotChecked=484, Total=59780 [2022-11-23 16:22:36,954 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 447 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 5324 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 5757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 5324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:22:36,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 229 Invalid, 5757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 5324 Invalid, 0 Unknown, 2 Unchecked, 10.3s Time] [2022-11-23 16:22:36,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-11-23 16:22:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 726. [2022-11-23 16:22:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.3489655172413793) internal successors, (978), 725 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:22:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 978 transitions. [2022-11-23 16:22:37,941 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 978 transitions. Word has length 42 [2022-11-23 16:22:37,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:22:37,942 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 978 transitions. [2022-11-23 16:22:37,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:22:37,942 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 978 transitions. [2022-11-23 16:22:37,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 16:22:37,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:22:37,943 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:22:37,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-23 16:22:38,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-23 16:22:38,160 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:22:38,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:22:38,160 INFO L85 PathProgramCache]: Analyzing trace with hash -174553412, now seen corresponding path program 20 times [2022-11-23 16:22:38,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:22:38,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527341865] [2022-11-23 16:22:38,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:22:38,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:22:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:22:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-23 16:22:38,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:22:38,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527341865] [2022-11-23 16:22:38,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527341865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:22:38,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665291487] [2022-11-23 16:22:38,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:22:38,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:22:38,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:22:38,706 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:22:38,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f390b644-bd7c-447b-82f9-f47c4a50792a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-23 16:22:39,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 16:22:39,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:22:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 16:22:39,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:22:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-23 16:22:40,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:22:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-23 16:22:40,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665291487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:22:40,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1466922165] [2022-11-23 16:22:40,546 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 16:22:40,546 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:22:40,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:22:40,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:22:40,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:22:40,624 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:22:40,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '77940#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:22:40,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:22:40,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:22:40,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 44 [2022-11-23 16:22:40,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507392984] [2022-11-23 16:22:40,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:22:40,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-23 16:22:40,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:22:40,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-23 16:22:40,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2117, Unknown=0, NotChecked=0, Total=2352 [2022-11-23 16:22:40,920 INFO L87 Difference]: Start difference. First operand 726 states and 978 transitions. Second operand has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 44 states have internal predecessors, (70), 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)