./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI --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 3a6236bdd88fd6afaea18904cacfb3d20cec5c672e4775ed237e350d1a6fc96b --- 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-5e519f3 [2022-11-03 03:56:49,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:56:49,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:56:49,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:56:49,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:56:49,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:56:49,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:56:49,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:56:49,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:56:49,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:56:49,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:56:49,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:56:49,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:56:49,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:56:49,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:56:49,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:56:49,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:56:49,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:56:49,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:56:49,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:56:49,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:56:49,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:56:49,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:56:49,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:56:49,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:56:49,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:56:49,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:56:49,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:56:49,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:56:49,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:56:49,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:56:49,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:56:50,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:56:50,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:56:50,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:56:50,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:56:50,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:56:50,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:56:50,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:56:50,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:56:50,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:56:50,006 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:56:50,041 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:56:50,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:56:50,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:56:50,041 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:56:50,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:56:50,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:56:50,043 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:56:50,043 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:56:50,043 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:56:50,043 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:56:50,043 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:56:50,044 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:56:50,044 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:56:50,044 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:56:50,044 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:56:50,044 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:56:50,045 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:56:50,045 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:56:50,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:56:50,046 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:56:50,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:56:50,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:56:50,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:56:50,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:56:50,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:56:50,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:56:50,047 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:56:50,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:56:50,047 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:56:50,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:56:50,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:56:50,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:56:50,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:56:50,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:56:50,049 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:56:50,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:56:50,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:56:50,049 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:56:50,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:56:50,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:56:50,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:56:50,050 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_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a6236bdd88fd6afaea18904cacfb3d20cec5c672e4775ed237e350d1a6fc96b [2022-11-03 03:56:50,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:56:50,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:56:50,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:56:50,370 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:56:50,371 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:56:50,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2022-11-03 03:56:50,446 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/data/3147458f9/9768f020179a43f1841997cfb403a46b/FLAGf7ffcb7bf [2022-11-03 03:56:50,997 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:56:50,997 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2022-11-03 03:56:51,004 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/data/3147458f9/9768f020179a43f1841997cfb403a46b/FLAGf7ffcb7bf [2022-11-03 03:56:51,355 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/data/3147458f9/9768f020179a43f1841997cfb403a46b [2022-11-03 03:56:51,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:56:51,360 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:56:51,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:56:51,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:56:51,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:56:51,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:56:51" (1/1) ... [2022-11-03 03:56:51,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43df295d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51, skipping insertion in model container [2022-11-03 03:56:51,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:56:51" (1/1) ... [2022-11-03 03:56:51,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:56:51,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:56:51,575 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i[813,826] [2022-11-03 03:56:51,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:56:51,623 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:56:51,632 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i[813,826] [2022-11-03 03:56:51,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:56:51,654 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:56:51,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51 WrapperNode [2022-11-03 03:56:51,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:56:51,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:56:51,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:56:51,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:56:51,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51" (1/1) ... [2022-11-03 03:56:51,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51" (1/1) ... [2022-11-03 03:56:51,690 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 93 [2022-11-03 03:56:51,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:56:51,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:56:51,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:56:51,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:56:51,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51" (1/1) ... [2022-11-03 03:56:51,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51" (1/1) ... [2022-11-03 03:56:51,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51" (1/1) ... [2022-11-03 03:56:51,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51" (1/1) ... [2022-11-03 03:56:51,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51" (1/1) ... [2022-11-03 03:56:51,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51" (1/1) ... [2022-11-03 03:56:51,729 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51" (1/1) ... [2022-11-03 03:56:51,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51" (1/1) ... [2022-11-03 03:56:51,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:56:51,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:56:51,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:56:51,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:56:51,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51" (1/1) ... [2022-11-03 03:56:51,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:56:51,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:51,792 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:56:51,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:56:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:56:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:56:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:56:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:56:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:56:51,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:56:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:56:51,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 03:56:51,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 03:56:51,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:56:51,927 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:56:51,929 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:56:52,207 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:56:52,302 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:56:52,302 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 03:56:52,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:52 BoogieIcfgContainer [2022-11-03 03:56:52,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:56:52,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:56:52,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:56:52,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:56:52,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:56:51" (1/3) ... [2022-11-03 03:56:52,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7c6c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:52, skipping insertion in model container [2022-11-03 03:56:52,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:56:51" (2/3) ... [2022-11-03 03:56:52,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7c6c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:56:52, skipping insertion in model container [2022-11-03 03:56:52,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:56:52" (3/3) ... [2022-11-03 03:56:52,328 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2022-11-03 03:56:52,351 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:56:52,352 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:56:52,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:56:52,421 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;@16001dc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:56:52,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:56:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:56:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 03:56:52,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:52,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:52,452 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:52,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1570464366, now seen corresponding path program 1 times [2022-11-03 03:56:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:52,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831861035] [2022-11-03 03:56:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:52,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:52,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:52,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831861035] [2022-11-03 03:56:52,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831861035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:52,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:52,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:56:52,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281526178] [2022-11-03 03:56:52,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:52,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:52,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:52,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:52,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:52,824 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:52,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:52,900 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2022-11-03 03:56:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:52,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 03:56:52,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:52,915 INFO L225 Difference]: With dead ends: 31 [2022-11-03 03:56:52,915 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 03:56:52,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:52,923 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:52,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:52,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 03:56:52,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-03 03:56:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:56:52,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-03 03:56:52,967 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 8 [2022-11-03 03:56:52,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:52,968 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-03 03:56:52,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:52,969 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-03 03:56:52,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:56:52,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:52,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:52,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:56:52,971 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:52,972 INFO L85 PathProgramCache]: Analyzing trace with hash 316387931, now seen corresponding path program 1 times [2022-11-03 03:56:52,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:52,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728731524] [2022-11-03 03:56:52,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:52,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:53,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:53,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728731524] [2022-11-03 03:56:53,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728731524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:56:53,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943179219] [2022-11-03 03:56:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:53,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:53,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:53,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:53,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:56:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:53,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:56:53,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:53,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:53,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943179219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:53,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:56:53,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-03 03:56:53,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37381375] [2022-11-03 03:56:53,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:53,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:53,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:53,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:53,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:53,283 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:53,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:53,332 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-11-03 03:56:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:53,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 03:56:53,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:53,335 INFO L225 Difference]: With dead ends: 29 [2022-11-03 03:56:53,335 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 03:56:53,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:53,337 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:53,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 03:56:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-03 03:56:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:56:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-03 03:56:53,342 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2022-11-03 03:56:53,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:53,344 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-03 03:56:53,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:53,345 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-03 03:56:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:56:53,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:53,346 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:53,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:53,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:53,575 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash -199720158, now seen corresponding path program 1 times [2022-11-03 03:56:53,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:53,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872741476] [2022-11-03 03:56:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:53,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:53,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:53,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872741476] [2022-11-03 03:56:53,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872741476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:56:53,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170751971] [2022-11-03 03:56:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:53,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:53,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:53,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:53,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:56:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:53,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:56:53,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:53,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:53,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170751971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:53,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [776980504] [2022-11-03 03:56:53,807 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:56:53,807 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:56:53,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:56:53,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:56:53,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:56:53,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:53,913 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:56:53,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:56:53,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:53,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 03:56:53,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:53,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 03:56:54,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:54,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:54,132 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 03:56:54,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-03 03:56:54,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:56:54,465 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2022-11-03 03:56:54,500 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:56:55,909 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '250#(and (exists ((|v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_1| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_1|) (= |__VERIFIER_assert_#in~cond| (ite (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_1|) 0) |v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_1|) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:56:55,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:56:55,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:56:55,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 03:56:55,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120518570] [2022-11-03 03:56:55,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:55,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:56:55,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:55,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:56:55,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:56:55,911 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:55,979 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2022-11-03 03:56:55,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:56:55,980 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 03:56:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:55,981 INFO L225 Difference]: With dead ends: 35 [2022-11-03 03:56:55,981 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 03:56:55,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:56:55,991 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:55,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 03:56:56,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-03 03:56:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:56:56,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-03 03:56:56,005 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2022-11-03 03:56:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:56,006 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-03 03:56:56,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:56,006 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-03 03:56:56,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 03:56:56,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:56,008 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:56,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:56,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:56,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:56,235 INFO L85 PathProgramCache]: Analyzing trace with hash 320669134, now seen corresponding path program 2 times [2022-11-03 03:56:56,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:56,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897031628] [2022-11-03 03:56:56,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:56,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:56:56,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:56,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897031628] [2022-11-03 03:56:56,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897031628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:56:56,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098674842] [2022-11-03 03:56:56,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:56:56,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:56,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:56,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:56,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:56:56,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:56:56,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:56:56,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:56:56,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:56:56,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:56:56,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098674842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:56,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [251697053] [2022-11-03 03:56:56,468 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:56:56,468 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:56:56,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:56:56,475 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:56:56,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:56:56,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:56,520 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:56:56,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:56:56,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:56,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 03:56:56,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:56,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:56:56,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:56,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:56:56,669 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:56:56,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-03 03:56:56,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:56:56,866 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2022-11-03 03:56:56,887 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:56:58,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '433#(and (exists ((|v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_2| Int)) (and (= (ite (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_2|) 0) |v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_2|) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_2|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:56:58,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:56:58,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:56:58,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-03 03:56:58,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381359684] [2022-11-03 03:56:58,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:58,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:56:58,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:58,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:56:58,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:56:58,225 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:58,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:58,293 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2022-11-03 03:56:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:56:58,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 03:56:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:58,295 INFO L225 Difference]: With dead ends: 42 [2022-11-03 03:56:58,295 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 03:56:58,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:56:58,296 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:58,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 03:56:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-03 03:56:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:56:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-03 03:56:58,302 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2022-11-03 03:56:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:58,302 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-03 03:56:58,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-03 03:56:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 03:56:58,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:58,303 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:58,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:58,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:58,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:58,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2013463470, now seen corresponding path program 3 times [2022-11-03 03:56:58,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:58,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209236897] [2022-11-03 03:56:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:58,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:56:58,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:58,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209236897] [2022-11-03 03:56:58,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209236897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:56:58,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005744794] [2022-11-03 03:56:58,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:56:58,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:58,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:58,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:58,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:56:58,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:56:58,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:56:58,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:56:58,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:56:58,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:56:58,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005744794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:58,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701179659] [2022-11-03 03:56:58,941 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:56:58,941 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:56:58,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:56:58,943 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:56:58,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:56:58,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:58,974 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:56:58,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 03:56:58,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:59,004 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:56:59,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:56:59,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:59,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 03:56:59,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:56:59,096 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 03:56:59,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-03 03:56:59,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:56:59,235 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2022-11-03 03:56:59,252 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:57:00,535 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '686#(and (exists ((|v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_3| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_3|) (= |__VERIFIER_assert_#in~cond| (ite (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_3|) 0) |v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_3|) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:57:00,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:57:00,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:57:00,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-03 03:57:00,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235836088] [2022-11-03 03:57:00,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:00,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 03:57:00,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:00,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 03:57:00,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:57:00,538 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:00,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:00,646 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2022-11-03 03:57:00,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 03:57:00,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 03:57:00,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:00,648 INFO L225 Difference]: With dead ends: 60 [2022-11-03 03:57:00,648 INFO L226 Difference]: Without dead ends: 41 [2022-11-03 03:57:00,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:57:00,649 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:00,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:57:00,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-03 03:57:00,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-03 03:57:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:57:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-11-03 03:57:00,656 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 20 [2022-11-03 03:57:00,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:00,656 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-11-03 03:57:00,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-11-03 03:57:00,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:57:00,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:00,657 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:00,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:00,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:00,878 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:00,879 INFO L85 PathProgramCache]: Analyzing trace with hash 923894414, now seen corresponding path program 4 times [2022-11-03 03:57:00,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:00,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701360291] [2022-11-03 03:57:00,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:00,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 03:57:01,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:01,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701360291] [2022-11-03 03:57:01,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701360291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:01,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534952944] [2022-11-03 03:57:01,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:57:01,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:01,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:01,371 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:01,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:57:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:01,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:57:01,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 03:57:01,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 03:57:01,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534952944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:01,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [67807041] [2022-11-03 03:57:01,933 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:57:01,933 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:57:01,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:57:01,934 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:57:01,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:57:01,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:01,962 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:57:01,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 03:57:01,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:01,993 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:57:01,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:57:02,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:02,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:57:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:02,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:02,094 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:57:02,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-03 03:57:02,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:57:02,302 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2022-11-03 03:57:02,316 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:57:03,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1103#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_4| Int)) (and (= |__VERIFIER_assert_#in~cond| (ite (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_4|) 0) |v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_4|) 1 0)) (<= 0 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_4|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:57:03,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:57:03,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:57:03,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-11-03 03:57:03,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616486166] [2022-11-03 03:57:03,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:03,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 03:57:03,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:03,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 03:57:03,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1009, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:57:03,649 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:03,854 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-11-03 03:57:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 03:57:03,855 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 03:57:03,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:03,859 INFO L225 Difference]: With dead ends: 98 [2022-11-03 03:57:03,859 INFO L226 Difference]: Without dead ends: 73 [2022-11-03 03:57:03,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=551, Invalid=1009, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:57:03,862 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:03,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:57:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-03 03:57:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-11-03 03:57:03,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:57:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-11-03 03:57:03,875 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 34 [2022-11-03 03:57:03,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:03,875 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-11-03 03:57:03,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 32 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:03,875 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-11-03 03:57:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-03 03:57:03,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:03,877 INFO L195 NwaCegarLoop]: trace histogram [30, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:03,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 03:57:04,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:04,078 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:04,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:04,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1964789618, now seen corresponding path program 5 times [2022-11-03 03:57:04,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:04,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017993442] [2022-11-03 03:57:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:04,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2022-11-03 03:57:05,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:05,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017993442] [2022-11-03 03:57:05,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017993442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:05,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004551375] [2022-11-03 03:57:05,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:57:05,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:05,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:05,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:05,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:57:08,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-03 03:57:08,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:57:08,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 03:57:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-11-03 03:57:09,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-11-03 03:57:10,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004551375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:10,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [578324688] [2022-11-03 03:57:10,381 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:57:10,381 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:57:10,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:57:10,381 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:57:10,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:57:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:10,408 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:57:10,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 03:57:10,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:10,436 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:57:10,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:57:10,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:10,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 03:57:10,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:10,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:10,550 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 03:57:10,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-03 03:57:10,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:57:10,687 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2022-11-03 03:57:10,702 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:57:12,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1881#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_5| Int)) (and (= |__VERIFIER_assert_#in~cond| (ite (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_5|) 0) |v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_5|) 1 0)) (<= 0 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_5|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:57:12,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:57:12,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:57:12,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-11-03 03:57:12,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210334568] [2022-11-03 03:57:12,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:12,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-03 03:57:12,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:12,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-03 03:57:12,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1914, Invalid=2778, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 03:57:12,442 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 62 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 62 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:12,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:12,890 INFO L93 Difference]: Finished difference Result 174 states and 241 transitions. [2022-11-03 03:57:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-03 03:57:12,890 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 62 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-11-03 03:57:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:12,895 INFO L225 Difference]: With dead ends: 174 [2022-11-03 03:57:12,895 INFO L226 Difference]: Without dead ends: 133 [2022-11-03 03:57:12,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1914, Invalid=2778, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 03:57:12,899 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:12,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:57:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-03 03:57:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-11-03 03:57:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 129 states have internal predecessors, (133), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:57:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2022-11-03 03:57:12,931 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 66 [2022-11-03 03:57:12,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:12,932 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2022-11-03 03:57:12,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 62 states have internal predecessors, (100), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2022-11-03 03:57:12,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 03:57:12,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:12,942 INFO L195 NwaCegarLoop]: trace histogram [60, 58, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:12,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:13,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:13,147 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:13,147 INFO L85 PathProgramCache]: Analyzing trace with hash 439461582, now seen corresponding path program 6 times [2022-11-03 03:57:13,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:13,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145748334] [2022-11-03 03:57:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:13,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3541 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-03 03:57:18,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:18,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145748334] [2022-11-03 03:57:18,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145748334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:18,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467261005] [2022-11-03 03:57:18,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:57:18,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:18,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:18,032 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:18,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:57:18,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:57:18,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:57:18,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 03:57:18,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3541 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-03 03:57:18,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3541 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-03 03:57:23,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467261005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:23,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2053475937] [2022-11-03 03:57:23,288 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:57:23,288 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:57:23,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:57:23,289 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:57:23,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:57:23,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:23,323 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:57:23,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 03:57:23,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:23,347 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:57:23,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:57:23,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:23,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:57:23,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:23,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:23,433 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:57:23,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-03 03:57:23,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:57:23,607 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2022-11-03 03:57:23,620 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:57:25,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3354#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6| Int)) (and (= (ite (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6|) 0) |v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_6|) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6|))) (= |#NULL.base| 0))' at error location [2022-11-03 03:57:25,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:57:25,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:57:25,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 124 [2022-11-03 03:57:25,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290802044] [2022-11-03 03:57:25,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:25,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-11-03 03:57:25,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-11-03 03:57:25,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7773, Invalid=9519, Unknown=0, NotChecked=0, Total=17292 [2022-11-03 03:57:25,141 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 125 states, 125 states have (on average 1.056) internal successors, (132), 124 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:26,897 INFO L93 Difference]: Finished difference Result 328 states and 459 transitions. [2022-11-03 03:57:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-11-03 03:57:26,897 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.056) internal successors, (132), 124 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2022-11-03 03:57:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:26,899 INFO L225 Difference]: With dead ends: 328 [2022-11-03 03:57:26,899 INFO L226 Difference]: Without dead ends: 257 [2022-11-03 03:57:26,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=7773, Invalid=9519, Unknown=0, NotChecked=0, Total=17292 [2022-11-03 03:57:26,904 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:26,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:57:26,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-03 03:57:26,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-11-03 03:57:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 253 states have (on average 1.0158102766798418) internal successors, (257), 253 states have internal predecessors, (257), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:57:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 261 transitions. [2022-11-03 03:57:26,925 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 261 transitions. Word has length 126 [2022-11-03 03:57:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:26,925 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 261 transitions. [2022-11-03 03:57:26,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.056) internal successors, (132), 124 states have internal predecessors, (132), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 261 transitions. [2022-11-03 03:57:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-03 03:57:26,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:26,930 INFO L195 NwaCegarLoop]: trace histogram [122, 120, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:26,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:27,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:27,135 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:27,135 INFO L85 PathProgramCache]: Analyzing trace with hash 553761038, now seen corresponding path program 7 times [2022-11-03 03:57:27,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:27,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568044511] [2022-11-03 03:57:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:27,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14763 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2022-11-03 03:57:40,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:40,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568044511] [2022-11-03 03:57:40,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568044511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:40,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639218449] [2022-11-03 03:57:40,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:57:40,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:40,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:40,849 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:40,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:57:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:41,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-03 03:57:41,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14763 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2022-11-03 03:57:41,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14763 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 7260 trivial. 0 not checked. [2022-11-03 03:57:59,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639218449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:59,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716123066] [2022-11-03 03:57:59,859 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:57:59,859 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:57:59,859 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:57:59,860 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:57:59,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:57:59,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:59,882 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:57:59,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 03:57:59,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:59,908 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:57:59,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:57:59,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:59,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:57:59,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:59,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:57:59,990 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:57:59,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-03 03:58:00,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:58:00,116 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2022-11-03 03:58:00,129 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:58:01,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6251#(and (exists ((|v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_7| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_7|) (= |__VERIFIER_assert_#in~cond| (ite (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_7|) 0) |v_ULTIMATE.start_main_~largest1~0#1_BEFORE_CALL_7|) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:58:01,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:58:01,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:58:01,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124, 124] total 248 [2022-11-03 03:58:01,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183197227] [2022-11-03 03:58:01,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:01,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 249 states [2022-11-03 03:58:01,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:58:01,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 249 interpolants. [2022-11-03 03:58:01,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30899, Invalid=34381, Unknown=0, NotChecked=0, Total=65280 [2022-11-03 03:58:01,898 INFO L87 Difference]: Start difference. First operand 257 states and 261 transitions. Second operand has 249 states, 249 states have (on average 1.0281124497991967) internal successors, (256), 248 states have internal predecessors, (256), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:15,496 INFO L93 Difference]: Finished difference Result 638 states and 893 transitions. [2022-11-03 03:58:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2022-11-03 03:58:15,498 INFO L78 Accepts]: Start accepts. Automaton has has 249 states, 249 states have (on average 1.0281124497991967) internal successors, (256), 248 states have internal predecessors, (256), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 250 [2022-11-03 03:58:15,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:15,501 INFO L225 Difference]: With dead ends: 638 [2022-11-03 03:58:15,501 INFO L226 Difference]: Without dead ends: 505 [2022-11-03 03:58:15,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3077 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=30899, Invalid=34381, Unknown=0, NotChecked=0, Total=65280 [2022-11-03 03:58:15,508 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 1179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1179 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:15,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1179 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 03:58:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-11-03 03:58:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 505. [2022-11-03 03:58:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 501 states have (on average 1.0079840319361277) internal successors, (505), 501 states have internal predecessors, (505), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:58:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 509 transitions. [2022-11-03 03:58:15,537 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 509 transitions. Word has length 250 [2022-11-03 03:58:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:15,538 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 509 transitions. [2022-11-03 03:58:15,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 249 states, 249 states have (on average 1.0281124497991967) internal successors, (256), 248 states have internal predecessors, (256), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 509 transitions. [2022-11-03 03:58:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-11-03 03:58:15,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:15,549 INFO L195 NwaCegarLoop]: trace histogram [246, 244, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:15,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:15,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:15,759 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:58:15,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:15,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1599398514, now seen corresponding path program 8 times [2022-11-03 03:58:15,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:58:15,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473548644] [2022-11-03 03:58:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:15,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:58:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:59:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 60271 backedges. 0 proven. 30381 refuted. 0 times theorem prover too weak. 29890 trivial. 0 not checked. [2022-11-03 03:59:05,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:59:05,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473548644] [2022-11-03 03:59:05,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473548644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:05,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142325434] [2022-11-03 03:59:05,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:59:05,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:05,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:05,575 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:05,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a427b21-f45d-4e68-bcfd-da299cb94198/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process