./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS --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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- 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-8393723 [2022-11-19 07:24:52,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:24:52,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:24:52,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:24:52,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:24:52,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:24:52,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:24:52,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:24:52,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:24:52,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:24:52,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:24:52,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:24:52,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:24:52,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:24:52,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:24:52,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:24:52,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:24:52,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:24:52,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:24:52,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:24:52,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:24:52,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:24:52,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:24:52,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:24:52,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:24:52,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:24:52,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:24:52,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:24:52,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:24:52,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:24:52,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:24:52,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:24:52,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:24:52,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:24:52,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:24:52,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:24:52,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:24:52,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:24:52,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:24:52,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:24:52,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:24:52,984 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:24:53,005 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:24:53,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:24:53,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:24:53,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:24:53,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:24:53,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:24:53,007 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:24:53,007 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:24:53,008 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:24:53,008 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:24:53,008 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:24:53,008 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:24:53,008 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:24:53,009 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:24:53,009 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:24:53,009 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:24:53,009 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:24:53,009 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:24:53,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:24:53,010 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:24:53,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:24:53,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:24:53,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:24:53,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:24:53,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:24:53,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:24:53,011 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:24:53,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:24:53,012 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:24:53,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:24:53,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:24:53,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:24:53,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:24:53,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:24:53,013 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:24:53,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:24:53,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:24:53,014 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:24:53,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:24:53,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:24:53,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:24:53,014 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_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2022-11-19 07:24:53,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:24:53,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:24:53,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:24:53,328 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:24:53,329 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:24:53,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-19 07:24:53,450 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/data/750a1501f/d00efc62ffca4f94918ae8add4cce9ad/FLAGb40931b8d [2022-11-19 07:24:53,854 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:24:53,855 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-19 07:24:53,864 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/data/750a1501f/d00efc62ffca4f94918ae8add4cce9ad/FLAGb40931b8d [2022-11-19 07:24:54,255 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/data/750a1501f/d00efc62ffca4f94918ae8add4cce9ad [2022-11-19 07:24:54,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:24:54,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:24:54,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:24:54,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:24:54,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:24:54,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:24:54" (1/1) ... [2022-11-19 07:24:54,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231ea801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54, skipping insertion in model container [2022-11-19 07:24:54,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:24:54" (1/1) ... [2022-11-19 07:24:54,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:24:54,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:24:54,551 WARN L234 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_d5291923-4aae-46ed-98bb-2e2df28ae9df/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-19 07:24:54,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:24:54,671 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:24:54,685 WARN L234 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_d5291923-4aae-46ed-98bb-2e2df28ae9df/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-19 07:24:54,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:24:54,766 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:24:54,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54 WrapperNode [2022-11-19 07:24:54,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:24:54,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:24:54,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:24:54,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:24:54,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54" (1/1) ... [2022-11-19 07:24:54,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54" (1/1) ... [2022-11-19 07:24:54,813 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 154 [2022-11-19 07:24:54,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:24:54,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:24:54,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:24:54,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:24:54,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54" (1/1) ... [2022-11-19 07:24:54,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54" (1/1) ... [2022-11-19 07:24:54,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54" (1/1) ... [2022-11-19 07:24:54,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54" (1/1) ... [2022-11-19 07:24:54,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54" (1/1) ... [2022-11-19 07:24:54,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54" (1/1) ... [2022-11-19 07:24:54,840 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54" (1/1) ... [2022-11-19 07:24:54,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54" (1/1) ... [2022-11-19 07:24:54,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:24:54,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:24:54,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:24:54,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:24:54,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54" (1/1) ... [2022-11-19 07:24:54,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:24:54,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:54,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:24:54,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:24:54,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:24:54,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:24:54,947 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-19 07:24:54,947 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-19 07:24:54,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:24:54,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:24:54,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:24:54,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:24:55,058 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:24:55,061 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:24:55,487 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:24:55,768 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:24:55,768 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:24:55,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:24:55 BoogieIcfgContainer [2022-11-19 07:24:55,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:24:55,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:24:55,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:24:55,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:24:55,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:24:54" (1/3) ... [2022-11-19 07:24:55,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f1317a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:24:55, skipping insertion in model container [2022-11-19 07:24:55,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:24:54" (2/3) ... [2022-11-19 07:24:55,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f1317a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:24:55, skipping insertion in model container [2022-11-19 07:24:55,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:24:55" (3/3) ... [2022-11-19 07:24:55,782 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2022-11-19 07:24:55,802 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:24:55,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:24:55,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:24:55,864 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;@65606093, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:24:55,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:24:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:24:55,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 07:24:55,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:55,879 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:55,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:55,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1826741825, now seen corresponding path program 1 times [2022-11-19 07:24:55,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:55,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836911072] [2022-11-19 07:24:55,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:55,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:24:56,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:56,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836911072] [2022-11-19 07:24:56,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836911072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:56,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337397296] [2022-11-19 07:24:56,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:56,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:56,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:56,371 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:56,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:24:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:56,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:24:56,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:24:56,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:24:57,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337397296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:57,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1351317249] [2022-11-19 07:24:57,370 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 07:24:57,370 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:24:57,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:24:57,383 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:24:57,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:24:57,582 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 58 for LOIs [2022-11-19 07:24:57,638 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:24:58,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1351317249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:58,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:24:58,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 13, 11] total 30 [2022-11-19 07:24:58,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992216405] [2022-11-19 07:24:58,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:58,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:24:58,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:58,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:24:58,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:24:58,946 INFO L87 Difference]: Start difference. First operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:24:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:59,332 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2022-11-19 07:24:59,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:24:59,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-11-19 07:24:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:59,353 INFO L225 Difference]: With dead ends: 108 [2022-11-19 07:24:59,353 INFO L226 Difference]: Without dead ends: 65 [2022-11-19 07:24:59,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:24:59,364 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:59,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 188 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:24:59,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-19 07:24:59,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2022-11-19 07:24:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 40 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-19 07:24:59,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-11-19 07:24:59,442 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 32 [2022-11-19 07:24:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:59,443 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-11-19 07:24:59,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:24:59,444 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-11-19 07:24:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:24:59,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:59,448 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:59,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:24:59,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 07:24:59,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:59,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:59,654 INFO L85 PathProgramCache]: Analyzing trace with hash 697904989, now seen corresponding path program 1 times [2022-11-19 07:24:59,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:59,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906720919] [2022-11-19 07:24:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:59,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:24:59,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:59,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906720919] [2022-11-19 07:24:59,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906720919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:59,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129560172] [2022-11-19 07:24:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:59,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:59,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:59,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:59,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:25:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:00,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:25:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:25:00,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:25:00,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129560172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:00,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [366232383] [2022-11-19 07:25:00,524 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 07:25:00,524 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:00,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:00,524 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:00,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:01,051 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 07:25:01,063 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-19 07:25:01,149 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:25:03,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '709#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:25:03,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:25:03,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:03,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 11] total 24 [2022-11-19 07:25:03,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455109709] [2022-11-19 07:25:03,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:03,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:25:03,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:03,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:25:03,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:25:03,216 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 07:25:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:03,969 INFO L93 Difference]: Finished difference Result 146 states and 203 transitions. [2022-11-19 07:25:03,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:25:03,970 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2022-11-19 07:25:03,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:03,974 INFO L225 Difference]: With dead ends: 146 [2022-11-19 07:25:03,974 INFO L226 Difference]: Without dead ends: 92 [2022-11-19 07:25:03,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 07:25:03,978 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 89 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:03,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 512 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:25:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-19 07:25:04,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 59. [2022-11-19 07:25:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 07:25:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2022-11-19 07:25:04,006 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 37 [2022-11-19 07:25:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:04,006 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2022-11-19 07:25:04,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 5 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 07:25:04,007 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2022-11-19 07:25:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 07:25:04,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:04,009 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:04,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:04,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:04,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:04,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1463229938, now seen corresponding path program 1 times [2022-11-19 07:25:04,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:04,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581898222] [2022-11-19 07:25:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:04,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:04,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:04,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581898222] [2022-11-19 07:25:04,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581898222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:04,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418788971] [2022-11-19 07:25:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:04,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:04,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:04,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:04,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:25:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:04,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:25:04,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:25:04,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:04,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418788971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:04,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [89395350] [2022-11-19 07:25:04,689 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 07:25:04,689 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:04,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:04,689 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:04,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:05,203 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-19 07:25:05,281 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:25:06,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [89395350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:25:06,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:06,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [5, 5, 5] total 27 [2022-11-19 07:25:06,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568588144] [2022-11-19 07:25:06,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:06,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:25:06,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:06,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:25:06,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-11-19 07:25:06,318 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand has 18 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:25:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:07,356 INFO L93 Difference]: Finished difference Result 117 states and 173 transitions. [2022-11-19 07:25:07,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:25:07,360 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2022-11-19 07:25:07,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:07,361 INFO L225 Difference]: With dead ends: 117 [2022-11-19 07:25:07,362 INFO L226 Difference]: Without dead ends: 102 [2022-11-19 07:25:07,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:25:07,363 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 116 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:07,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 244 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:25:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-19 07:25:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2022-11-19 07:25:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-19 07:25:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2022-11-19 07:25:07,385 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 39 [2022-11-19 07:25:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:07,386 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2022-11-19 07:25:07,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:25:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2022-11-19 07:25:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:25:07,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:07,388 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:07,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:07,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:07,595 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1674721752, now seen corresponding path program 1 times [2022-11-19 07:25:07,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:07,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095306057] [2022-11-19 07:25:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:07,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:07,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:07,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095306057] [2022-11-19 07:25:07,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095306057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:07,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084199156] [2022-11-19 07:25:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:07,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:07,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:07,868 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:07,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:25:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:25:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:25:08,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:25:08,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084199156] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:08,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:25:08,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 10] total 18 [2022-11-19 07:25:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059801771] [2022-11-19 07:25:08,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:25:08,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:25:08,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:08,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:25:08,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:25:08,291 INFO L87 Difference]: Start difference. First operand 65 states and 87 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:25:08,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:08,404 INFO L93 Difference]: Finished difference Result 87 states and 115 transitions. [2022-11-19 07:25:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:25:08,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-11-19 07:25:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:08,406 INFO L225 Difference]: With dead ends: 87 [2022-11-19 07:25:08,406 INFO L226 Difference]: Without dead ends: 70 [2022-11-19 07:25:08,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:25:08,408 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 4 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:08,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 191 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:25:08,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-19 07:25:08,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2022-11-19 07:25:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.32) internal successors, (66), 49 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 07:25:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2022-11-19 07:25:08,425 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 41 [2022-11-19 07:25:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:08,425 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2022-11-19 07:25:08,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:25:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2022-11-19 07:25:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 07:25:08,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:08,427 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:08,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:08,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-19 07:25:08,633 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:08,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:08,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2043323469, now seen corresponding path program 1 times [2022-11-19 07:25:08,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:08,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781012277] [2022-11-19 07:25:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:08,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:08,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:08,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781012277] [2022-11-19 07:25:08,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781012277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:08,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185749894] [2022-11-19 07:25:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:08,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:08,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:08,740 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:08,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:25:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:08,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:25:08,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:25:08,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:08,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185749894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:08,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1856556101] [2022-11-19 07:25:08,952 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 07:25:08,952 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:08,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:08,952 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:08,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:09,295 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 07:25:09,305 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-19 07:25:09,445 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:25:11,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2261#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:25:11,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:25:11,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:11,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-19 07:25:11,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588474485] [2022-11-19 07:25:11,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:11,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:25:11,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:11,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:25:11,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:25:11,144 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:25:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:11,390 INFO L93 Difference]: Finished difference Result 159 states and 222 transitions. [2022-11-19 07:25:11,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:25:11,391 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 42 [2022-11-19 07:25:11,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:11,397 INFO L225 Difference]: With dead ends: 159 [2022-11-19 07:25:11,398 INFO L226 Difference]: Without dead ends: 114 [2022-11-19 07:25:11,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:25:11,401 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:11,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 126 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:25:11,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-19 07:25:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 69. [2022-11-19 07:25:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 57 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 07:25:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2022-11-19 07:25:11,440 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 42 [2022-11-19 07:25:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:11,440 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2022-11-19 07:25:11,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:25:11,441 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2022-11-19 07:25:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 07:25:11,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:11,443 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:11,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 07:25:11,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:11,650 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:11,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:11,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2087251469, now seen corresponding path program 1 times [2022-11-19 07:25:11,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:11,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26341830] [2022-11-19 07:25:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:11,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:11,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:11,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26341830] [2022-11-19 07:25:11,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26341830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:11,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664988461] [2022-11-19 07:25:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:11,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:11,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:11,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:11,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:25:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:11,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:25:11,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:25:11,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:12,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664988461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:12,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1117064889] [2022-11-19 07:25:12,083 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 07:25:12,083 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:12,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:12,084 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:12,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:12,446 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 07:25:12,456 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-19 07:25:12,631 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:25:14,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2875#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:25:14,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:25:14,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:14,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-19 07:25:14,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753723179] [2022-11-19 07:25:14,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:14,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:25:14,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:14,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:25:14,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:25:14,268 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:25:14,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:14,705 INFO L93 Difference]: Finished difference Result 164 states and 226 transitions. [2022-11-19 07:25:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:25:14,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-11-19 07:25:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:14,707 INFO L225 Difference]: With dead ends: 164 [2022-11-19 07:25:14,707 INFO L226 Difference]: Without dead ends: 117 [2022-11-19 07:25:14,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:25:14,708 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 137 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:14,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 118 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:25:14,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-19 07:25:14,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2022-11-19 07:25:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 61 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 07:25:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2022-11-19 07:25:14,740 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 44 [2022-11-19 07:25:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:14,741 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2022-11-19 07:25:14,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:25:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2022-11-19 07:25:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 07:25:14,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:14,746 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:14,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:14,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:14,951 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:14,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:14,952 INFO L85 PathProgramCache]: Analyzing trace with hash -832765327, now seen corresponding path program 2 times [2022-11-19 07:25:14,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:14,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210506245] [2022-11-19 07:25:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:14,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:15,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:15,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210506245] [2022-11-19 07:25:15,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210506245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:15,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135990764] [2022-11-19 07:25:15,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:25:15,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:15,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:15,099 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:15,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:25:15,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-19 07:25:15,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:25:15,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:25:15,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:25:15,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:15,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135990764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:15,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [742637387] [2022-11-19 07:25:15,500 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 07:25:15,500 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:15,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:15,501 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:15,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:15,800 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 07:25:15,808 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-19 07:25:15,935 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:25:17,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3548#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:25:17,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:25:17,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:17,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-11-19 07:25:17,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599588691] [2022-11-19 07:25:17,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:17,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:25:17,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:17,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:25:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:25:17,526 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:25:17,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:17,946 INFO L93 Difference]: Finished difference Result 225 states and 320 transitions. [2022-11-19 07:25:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:25:17,949 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-11-19 07:25:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:17,952 INFO L225 Difference]: With dead ends: 225 [2022-11-19 07:25:17,952 INFO L226 Difference]: Without dead ends: 180 [2022-11-19 07:25:17,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=408, Invalid=1484, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 07:25:17,956 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 146 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:17,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 224 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:25:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-19 07:25:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 87. [2022-11-19 07:25:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 76 states have (on average 1.263157894736842) internal successors, (96), 75 states have internal predecessors, (96), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 07:25:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2022-11-19 07:25:18,017 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 51 [2022-11-19 07:25:18,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:18,019 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2022-11-19 07:25:18,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.05) internal successors, (81), 20 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:25:18,019 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2022-11-19 07:25:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 07:25:18,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:18,022 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:18,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:18,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:18,228 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:18,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:18,228 INFO L85 PathProgramCache]: Analyzing trace with hash 409308403, now seen corresponding path program 2 times [2022-11-19 07:25:18,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:18,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187718614] [2022-11-19 07:25:18,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:18,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:18,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:18,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187718614] [2022-11-19 07:25:18,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187718614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:18,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684543625] [2022-11-19 07:25:18,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:25:18,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:18,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:18,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:18,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:25:18,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-19 07:25:18,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:25:18,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:25:18,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:25:18,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:19,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684543625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:19,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [316297588] [2022-11-19 07:25:19,114 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 07:25:19,114 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:19,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:19,115 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:19,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:19,448 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 07:25:19,456 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-19 07:25:19,644 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:25:21,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4376#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:25:21,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:25:21,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:21,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-19 07:25:21,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268274989] [2022-11-19 07:25:21,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:21,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 07:25:21,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:21,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 07:25:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 07:25:21,675 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:25:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:39,168 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2022-11-19 07:25:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:25:39,169 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 56 [2022-11-19 07:25:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:39,170 INFO L225 Difference]: With dead ends: 236 [2022-11-19 07:25:39,170 INFO L226 Difference]: Without dead ends: 189 [2022-11-19 07:25:39,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=616, Invalid=2242, Unknown=4, NotChecked=0, Total=2862 [2022-11-19 07:25:39,172 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 185 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:39,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 356 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:25:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-19 07:25:39,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 97. [2022-11-19 07:25:39,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 85 states have internal predecessors, (105), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 07:25:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2022-11-19 07:25:39,218 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 56 [2022-11-19 07:25:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:39,220 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2022-11-19 07:25:39,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.76) internal successors, (94), 25 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:25:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2022-11-19 07:25:39,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 07:25:39,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:39,222 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:39,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:39,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:39,437 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:39,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:39,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1607789041, now seen corresponding path program 3 times [2022-11-19 07:25:39,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:39,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990908838] [2022-11-19 07:25:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:39,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:39,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:39,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990908838] [2022-11-19 07:25:39,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990908838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:39,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279092191] [2022-11-19 07:25:39,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:25:39,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:39,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:39,783 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:39,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:25:39,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:25:39,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:25:39,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:25:39,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:25:40,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:40,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279092191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:40,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [353560099] [2022-11-19 07:25:40,580 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 07:25:40,580 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:40,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:40,581 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:40,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:40,888 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 07:25:40,896 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-19 07:25:40,994 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:25:42,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5329#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:25:42,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:25:42,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:42,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2022-11-19 07:25:42,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119746730] [2022-11-19 07:25:42,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:42,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 07:25:42,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:42,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 07:25:42,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=2274, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 07:25:42,862 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 38 states, 38 states have (on average 3.5526315789473686) internal successors, (135), 38 states have internal predecessors, (135), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:25:43,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:43,673 INFO L93 Difference]: Finished difference Result 357 states and 516 transitions. [2022-11-19 07:25:43,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-19 07:25:43,675 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5526315789473686) internal successors, (135), 38 states have internal predecessors, (135), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2022-11-19 07:25:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:43,678 INFO L225 Difference]: With dead ends: 357 [2022-11-19 07:25:43,678 INFO L226 Difference]: Without dead ends: 312 [2022-11-19 07:25:43,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1182, Invalid=3374, Unknown=0, NotChecked=0, Total=4556 [2022-11-19 07:25:43,680 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 253 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:43,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 352 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:25:43,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-19 07:25:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 123. [2022-11-19 07:25:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 111 states have internal predecessors, (136), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 07:25:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2022-11-19 07:25:43,726 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 69 [2022-11-19 07:25:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:43,726 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2022-11-19 07:25:43,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5526315789473686) internal successors, (135), 38 states have internal predecessors, (135), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:25:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2022-11-19 07:25:43,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-19 07:25:43,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:43,728 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:25:43,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-19 07:25:43,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:43,932 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:25:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1675558157, now seen corresponding path program 3 times [2022-11-19 07:25:43,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:25:43,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516527486] [2022-11-19 07:25:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:43,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:25:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 3 proven. 281 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:44,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:25:44,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516527486] [2022-11-19 07:25:44,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516527486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:25:44,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742743477] [2022-11-19 07:25:44,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:25:44,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:25:44,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:44,599 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:25:44,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:25:44,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:25:44,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:25:44,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 07:25:44,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 21 proven. 273 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:25:45,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:25:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 3 proven. 281 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:25:46,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742743477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:25:46,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [747423414] [2022-11-19 07:25:46,119 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 07:25:46,120 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:25:46,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:25:46,120 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:25:46,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:25:46,470 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 07:25:46,478 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-19 07:25:46,638 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:25:49,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6585#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:25:49,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:25:49,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:25:49,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2022-11-19 07:25:49,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339322137] [2022-11-19 07:25:49,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:25:49,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 07:25:49,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:25:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 07:25:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3414, Unknown=0, NotChecked=0, Total=4160 [2022-11-19 07:25:49,206 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand has 49 states, 49 states have (on average 3.3877551020408165) internal successors, (166), 49 states have internal predecessors, (166), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:26:28,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:28,230 INFO L93 Difference]: Finished difference Result 320 states and 442 transitions. [2022-11-19 07:26:28,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-19 07:26:28,231 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.3877551020408165) internal successors, (166), 49 states have internal predecessors, (166), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2022-11-19 07:26:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:28,233 INFO L225 Difference]: With dead ends: 320 [2022-11-19 07:26:28,233 INFO L226 Difference]: Without dead ends: 273 [2022-11-19 07:26:28,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=1725, Invalid=5924, Unknown=7, NotChecked=0, Total=7656 [2022-11-19 07:26:28,236 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 494 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 2604 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 2816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:28,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1106 Invalid, 2816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2604 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-19 07:26:28,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-19 07:26:28,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 127. [2022-11-19 07:26:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 116 states have (on average 1.146551724137931) internal successors, (133), 115 states have internal predecessors, (133), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 07:26:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2022-11-19 07:26:28,281 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 80 [2022-11-19 07:26:28,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:28,282 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2022-11-19 07:26:28,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.3877551020408165) internal successors, (166), 49 states have internal predecessors, (166), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:26:28,282 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2022-11-19 07:26:28,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-19 07:26:28,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:28,283 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:28,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-19 07:26:28,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:26:28,489 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:28,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:28,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1521228017, now seen corresponding path program 4 times [2022-11-19 07:26:28,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:28,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362874374] [2022-11-19 07:26:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:28,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 3 proven. 744 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:26:29,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:29,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362874374] [2022-11-19 07:26:29,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362874374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:29,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855695034] [2022-11-19 07:26:29,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:26:29,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:29,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:29,404 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:29,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:26:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:29,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:26:29,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 20 proven. 737 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:26:30,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 3 proven. 744 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:26:31,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855695034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:31,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [649017902] [2022-11-19 07:26:31,442 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 07:26:31,442 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:26:31,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:26:31,443 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:26:31,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:26:31,761 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-19 07:26:31,771 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 14 for LOIs [2022-11-19 07:26:31,871 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:26:33,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7972#(and (= (select |#length| 3) 12) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:26:33,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:26:33,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:26:33,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2022-11-19 07:26:33,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433693682] [2022-11-19 07:26:33,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:26:33,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-19 07:26:33,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:33,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-19 07:26:33,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2196, Invalid=5994, Unknown=0, NotChecked=0, Total=8190 [2022-11-19 07:26:33,764 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 74 states, 74 states have (on average 3.2837837837837838) internal successors, (243), 74 states have internal predecessors, (243), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:26:35,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:35,496 INFO L93 Difference]: Finished difference Result 639 states and 932 transitions. [2022-11-19 07:26:35,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-19 07:26:35,497 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.2837837837837838) internal successors, (243), 74 states have internal predecessors, (243), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 105 [2022-11-19 07:26:35,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:35,501 INFO L225 Difference]: With dead ends: 639 [2022-11-19 07:26:35,501 INFO L226 Difference]: Without dead ends: 594 [2022-11-19 07:26:35,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5269 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4026, Invalid=9314, Unknown=0, NotChecked=0, Total=13340 [2022-11-19 07:26:35,505 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 672 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:35,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 345 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:26:35,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-11-19 07:26:35,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 195. [2022-11-19 07:26:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 184 states have (on average 1.2065217391304348) internal successors, (222), 183 states have internal predecessors, (222), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-19 07:26:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 235 transitions. [2022-11-19 07:26:35,595 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 235 transitions. Word has length 105 [2022-11-19 07:26:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:35,596 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 235 transitions. [2022-11-19 07:26:35,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.2837837837837838) internal successors, (243), 74 states have internal predecessors, (243), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:26:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 235 transitions. [2022-11-19 07:26:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-19 07:26:35,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:35,597 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:35,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 07:26:35,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:35,798 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:35,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:35,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1249937011, now seen corresponding path program 4 times [2022-11-19 07:26:35,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:35,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598663815] [2022-11-19 07:26:35,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:35,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:26:35,863 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:26:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:26:35,974 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:26:35,974 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:26:35,975 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:26:35,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:26:35,981 INFO L444 BasicCegarLoop]: Path program histogram: [4, 4, 1, 1, 1, 1] [2022-11-19 07:26:35,985 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:26:36,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:26:36 BoogieIcfgContainer [2022-11-19 07:26:36,080 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:26:36,080 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:26:36,080 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:26:36,080 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:26:36,081 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:24:55" (3/4) ... [2022-11-19 07:26:36,084 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-19 07:26:36,084 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:26:36,085 INFO L158 Benchmark]: Toolchain (without parser) took 101823.18ms. Allocated memory was 153.1MB in the beginning and 295.7MB in the end (delta: 142.6MB). Free memory was 116.8MB in the beginning and 201.3MB in the end (delta: -84.5MB). Peak memory consumption was 58.0MB. Max. memory is 16.1GB. [2022-11-19 07:26:36,085 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 86.0MB. Free memory was 40.8MB in the beginning and 40.8MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:26:36,086 INFO L158 Benchmark]: CACSL2BoogieTranslator took 501.54ms. Allocated memory is still 153.1MB. Free memory was 116.4MB in the beginning and 123.8MB in the end (delta: -7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:26:36,086 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.63ms. Allocated memory is still 153.1MB. Free memory was 123.8MB in the beginning and 121.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:26:36,087 INFO L158 Benchmark]: Boogie Preprocessor took 30.51ms. Allocated memory is still 153.1MB. Free memory was 121.7MB in the beginning and 119.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:26:36,087 INFO L158 Benchmark]: RCFGBuilder took 926.32ms. Allocated memory is still 153.1MB. Free memory was 119.9MB in the beginning and 80.1MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2022-11-19 07:26:36,087 INFO L158 Benchmark]: TraceAbstraction took 100306.01ms. Allocated memory was 153.1MB in the beginning and 295.7MB in the end (delta: 142.6MB). Free memory was 80.1MB in the beginning and 201.3MB in the end (delta: -121.2MB). Peak memory consumption was 23.2MB. Max. memory is 16.1GB. [2022-11-19 07:26:36,088 INFO L158 Benchmark]: Witness Printer took 4.08ms. Allocated memory is still 295.7MB. Free memory is still 201.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:26:36,094 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 86.0MB. Free memory was 40.8MB in the beginning and 40.8MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 501.54ms. Allocated memory is still 153.1MB. Free memory was 116.4MB in the beginning and 123.8MB in the end (delta: -7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.63ms. Allocated memory is still 153.1MB. Free memory was 123.8MB in the beginning and 121.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.51ms. Allocated memory is still 153.1MB. Free memory was 121.7MB in the beginning and 119.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 926.32ms. Allocated memory is still 153.1MB. Free memory was 119.9MB in the beginning and 80.1MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * TraceAbstraction took 100306.01ms. Allocated memory was 153.1MB in the beginning and 295.7MB in the end (delta: 142.6MB). Free memory was 80.1MB in the beginning and 201.3MB in the end (delta: -121.2MB). Peak memory consumption was 23.2MB. Max. memory is 16.1GB. * Witness Printer took 4.08ms. Allocated memory is still 295.7MB. Free memory is still 201.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 77, overapproximation of bitwiseAnd at line 76, overapproximation of bitwiseComplement at line 76. Possible FailurePath: [L221] unsigned int a ; [L222] unsigned int ma = __VERIFIER_nondet_uint(); [L223] signed char ea = __VERIFIER_nondet_char(); [L224] unsigned int b ; [L225] unsigned int mb = __VERIFIER_nondet_uint(); [L226] signed char eb = __VERIFIER_nondet_char(); [L227] unsigned int r_mul ; [L228] unsigned int zero ; [L229] unsigned int one ; [L230] int sb ; [L231] int tmp ; [L232] int tmp___0 ; [L233] int tmp___1 ; [L234] int __retres16 ; VAL [ea=-128, eb=0] [L238] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L238] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=-128, eb=0] [L238] zero = base2flt(0, 0) [L239] CALL, EXPR base2flt(1, 0) VAL [\old(e)=0, \old(m)=1] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L29] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L35] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=0, m=1] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-1, m=2] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-1, m=2] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-1, m=2] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-2, m=4] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-2, m=4] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-2, m=4] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-3, m=8] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-3, m=8] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-3, m=8] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-4, m=16] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-4, m=16] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-4, m=16] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-5, m=32] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-5, m=32] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-5, m=32] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-6, m=64] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-6, m=64] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-6, m=64] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-7, m=128] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-7, m=128] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-7, m=128] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-8, m=256] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-8, m=256] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-8, m=256] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-9, m=512] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-9, m=512] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-9, m=512] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-10, m=1024] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-10, m=1024] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-10, m=1024] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-11, m=2048] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-11, m=2048] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-11, m=2048] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-12, m=4096] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-12, m=4096] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-12, m=4096] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-13, m=8192] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-13, m=8192] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-13, m=8192] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-14, m=16384] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-14, m=16384] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-14, m=16384] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-15, m=32768] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-15, m=32768] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-15, m=32768] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-16, m=65536] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-16, m=65536] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-16, m=65536] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-17, m=131072] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-17, m=131072] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-17, m=131072] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-18, m=262144] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-18, m=262144] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-18, m=262144] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-19, m=524288] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-19, m=524288] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-19, m=524288] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-20, m=1048576] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-20, m=1048576] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-20, m=1048576] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-21, m=2097152] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-21, m=2097152] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-21, m=2097152] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-22, m=4194304] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-22, m=4194304] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-22, m=4194304] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-23, m=8388608] [L47] COND TRUE m < 1U << 24U VAL [\old(e)=0, \old(m)=1, e=-23, m=8388608] [L37] COND TRUE 1 VAL [\old(e)=0, \old(m)=1, e=-23, m=8388608] [L39] COND FALSE !(e <= -128) [L45] e = e - 1 [L46] m = m << 1U VAL [\old(e)=0, \old(m)=1, e=-24, m=16777216] [L47] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=1, e=-24, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=0, \old(m)=1, __retres4=0, e=-24, m=2550136832, res=0] [L80] return (__retres4); [L239] RET, EXPR base2flt(1, 0) VAL [base2flt(1, 0)=4294967296, ea=-128, eb=0, zero=0] [L239] one = base2flt(1, 0) [L240] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-128, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-128, \old(m)=16777216, e=-128, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=-128, \old(m)=16777216, __retres4=1, e=-128, m=1, res=1] [L80] return (__retres4); [L240] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=-4294967295, ea=-128, eb=0, ma=16777216, one=0, zero=0] [L240] a = base2flt(ma, ea) [L241] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); [L241] RET, EXPR base2flt(mb, eb) VAL [a=1, base2flt(mb, eb)=0, ea=-128, eb=0, ma=16777216, mb=0, one=0, zero=0] [L241] b = base2flt(mb, eb) [L242] CALL, EXPR mulflt(a, b) [L148] unsigned int res ; [L149] unsigned int ma ; [L150] unsigned int mb ; [L151] unsigned long long accu ; [L152] int ea ; [L153] int eb ; [L154] unsigned int tmp ; [L155] unsigned int __retres10 ; [L158] COND FALSE !(a < b) VAL [\old(a)=1, \old(b)=0, a=1, b=0, tmp=1] [L165] COND TRUE ! b [L166] __retres10 = 0U VAL [\old(a)=1, \old(b)=0, __retres10=0, a=1, b=0, tmp=1] [L217] return (__retres10); [L242] RET, EXPR mulflt(a, b) [L242] r_mul = mulflt(a, b) [L244] COND FALSE !(b < one) [L247] COND FALSE !(b > one) [L250] tmp = 0 [L252] sb = tmp VAL [a=1, b=0, ea=-128, eb=0, ma=16777216, mb=0, one=0, r_mul=0, sb=0, tmp=0, zero=0] [L254] COND TRUE sb == 0 [L255] COND TRUE r_mul < a [L256] tmp___1 = -1 VAL [a=1, b=0, ea=-128, eb=0, ma=16777216, mb=0, one=0, r_mul=0, sb=0, tmp=0, tmp___0=-1, tmp___1=-1, zero=0] [L266] CALL __VERIFIER_assert(tmp___1 == 0) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 100.1s, OverallIterations: 12, TraceHistogramMax: 24, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 62.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2242 SdHoareTripleChecker+Valid, 5.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2219 mSDsluCounter, 3762 SdHoareTripleChecker+Invalid, 4.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3338 mSDsCounter, 625 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5726 IncrementalHoareTripleChecker+Invalid, 6351 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 625 mSolverCounterUnsat, 424 mSDtfsCounter, 5726 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2015 GetRequests, 1467 SyntacticMatches, 0 SemanticMatches, 548 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12904 ImplicationChecksByTransitivity, 77.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=195occurred in iteration=11, InterpolantAutomatonStates: 284, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 11 MinimizatonAttempts, 1104 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 10.1s InterpolantComputationTime, 1302 NumberOfCodeBlocks, 1302 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 1755 ConstructedInterpolants, 0 QuantifiedInterpolants, 7060 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1990 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 33 InterpolantComputations, 1 PerfectInterpolantSequences, 659/4560 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.9s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 33, DAG_INTERPRETER_EARLY_EXITS: 3, TOOLS_POST_APPLICATIONS: 47, TOOLS_POST_TIME: 0.3s, TOOLS_POST_CALL_APPLICATIONS: 18, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 12, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 77, TOOLS_QUANTIFIERELIM_TIME: 0.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 113, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 17, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 4, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 33, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 0.1s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.1s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 12, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 527, DAG_COMPRESSION_RETAINED_NODES: 116, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-19 07:26:36,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS --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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- 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-8393723 [2022-11-19 07:26:38,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:26:38,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:26:38,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:26:38,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:26:38,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:26:38,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:26:38,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:26:38,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:26:38,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:26:38,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:26:38,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:26:38,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:26:38,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:26:38,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:26:38,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:26:38,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:26:38,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:26:38,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:26:38,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:26:38,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:26:38,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:26:38,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:26:38,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:26:38,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:26:38,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:26:38,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:26:38,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:26:38,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:26:38,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:26:38,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:26:38,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:26:38,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:26:38,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:26:38,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:26:38,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:26:38,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:26:38,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:26:38,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:26:38,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:26:38,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:26:38,537 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-19 07:26:38,561 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:26:38,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:26:38,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:26:38,562 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:26:38,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:26:38,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:26:38,563 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:26:38,563 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:26:38,564 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:26:38,564 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:26:38,564 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:26:38,565 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:26:38,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:26:38,566 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:26:38,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:26:38,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:26:38,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:26:38,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:26:38,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:26:38,567 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:26:38,568 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:26:38,568 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:26:38,568 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:26:38,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:26:38,569 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:26:38,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:26:38,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:26:38,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:26:38,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:26:38,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:26:38,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:26:38,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:26:38,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:26:38,571 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:26:38,572 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:38,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:26:38,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:26:38,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:26:38,573 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2022-11-19 07:26:38,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:26:38,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:26:38,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:26:38,993 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:26:38,995 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:26:39,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-19 07:26:39,078 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/data/7784e35dd/fe6b5a6aa78c42e0bd758fb1b849daea/FLAG912d3450b [2022-11-19 07:26:39,653 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:26:39,655 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-19 07:26:39,665 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/data/7784e35dd/fe6b5a6aa78c42e0bd758fb1b849daea/FLAG912d3450b [2022-11-19 07:26:39,999 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/data/7784e35dd/fe6b5a6aa78c42e0bd758fb1b849daea [2022-11-19 07:26:40,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:26:40,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:26:40,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:26:40,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:26:40,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:26:40,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:26:40" (1/1) ... [2022-11-19 07:26:40,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@662b1421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40, skipping insertion in model container [2022-11-19 07:26:40,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:26:40" (1/1) ... [2022-11-19 07:26:40,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:26:40,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:26:40,249 WARN L234 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_d5291923-4aae-46ed-98bb-2e2df28ae9df/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-19 07:26:40,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:26:40,321 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:26:40,357 WARN L234 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_d5291923-4aae-46ed-98bb-2e2df28ae9df/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-19 07:26:40,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:26:40,396 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:26:40,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40 WrapperNode [2022-11-19 07:26:40,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:26:40,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:26:40,398 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:26:40,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:26:40,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40" (1/1) ... [2022-11-19 07:26:40,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40" (1/1) ... [2022-11-19 07:26:40,459 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 110 [2022-11-19 07:26:40,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:26:40,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:26:40,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:26:40,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:26:40,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40" (1/1) ... [2022-11-19 07:26:40,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40" (1/1) ... [2022-11-19 07:26:40,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40" (1/1) ... [2022-11-19 07:26:40,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40" (1/1) ... [2022-11-19 07:26:40,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40" (1/1) ... [2022-11-19 07:26:40,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40" (1/1) ... [2022-11-19 07:26:40,510 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40" (1/1) ... [2022-11-19 07:26:40,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40" (1/1) ... [2022-11-19 07:26:40,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:26:40,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:26:40,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:26:40,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:26:40,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40" (1/1) ... [2022-11-19 07:26:40,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:26:40,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:40,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:26:40,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:26:40,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:26:40,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:26:40,605 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-19 07:26:40,605 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-19 07:26:40,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:26:40,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:26:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:26:40,606 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:26:40,685 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:26:40,687 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:26:41,065 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:26:41,074 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:26:41,076 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:26:41,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:26:41 BoogieIcfgContainer [2022-11-19 07:26:41,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:26:41,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:26:41,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:26:41,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:26:41,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:26:40" (1/3) ... [2022-11-19 07:26:41,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197b411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:26:41, skipping insertion in model container [2022-11-19 07:26:41,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:26:40" (2/3) ... [2022-11-19 07:26:41,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197b411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:26:41, skipping insertion in model container [2022-11-19 07:26:41,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:26:41" (3/3) ... [2022-11-19 07:26:41,106 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2022-11-19 07:26:41,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:26:41,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:26:41,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:26:41,198 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;@20f41293, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:26:41,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:26:41,203 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:26:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:26:41,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:41,216 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:41,217 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1696138713, now seen corresponding path program 1 times [2022-11-19 07:26:41,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:41,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348220512] [2022-11-19 07:26:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:41,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:41,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:41,252 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:41,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 07:26:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:41,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:26:41,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:41,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:41,588 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:41,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348220512] [2022-11-19 07:26:41,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348220512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:41,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:41,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:26:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395063407] [2022-11-19 07:26:41,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:41,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:26:41,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:41,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:26:41,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:26:41,640 INFO L87 Difference]: Start difference. First operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:26:41,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:41,815 INFO L93 Difference]: Finished difference Result 113 states and 179 transitions. [2022-11-19 07:26:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:26:41,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-11-19 07:26:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:41,827 INFO L225 Difference]: With dead ends: 113 [2022-11-19 07:26:41,827 INFO L226 Difference]: Without dead ends: 59 [2022-11-19 07:26:41,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:26:41,834 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:41,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 161 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:26:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-19 07:26:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2022-11-19 07:26:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:26:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2022-11-19 07:26:41,881 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 41 [2022-11-19 07:26:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:41,882 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2022-11-19 07:26:41,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:26:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2022-11-19 07:26:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 07:26:41,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:41,886 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:41,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:42,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:42,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:42,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:42,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1421820539, now seen corresponding path program 1 times [2022-11-19 07:26:42,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:42,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845150610] [2022-11-19 07:26:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:42,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:42,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:42,117 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:42,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 07:26:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:42,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:26:42,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:42,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:42,259 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:42,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845150610] [2022-11-19 07:26:42,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845150610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:42,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:42,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:26:42,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071089485] [2022-11-19 07:26:42,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:42,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:26:42,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:26:42,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:26:42,271 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:26:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:42,388 INFO L93 Difference]: Finished difference Result 105 states and 150 transitions. [2022-11-19 07:26:42,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:26:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2022-11-19 07:26:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:42,390 INFO L225 Difference]: With dead ends: 105 [2022-11-19 07:26:42,391 INFO L226 Difference]: Without dead ends: 62 [2022-11-19 07:26:42,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:26:42,393 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 10 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:42,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 154 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:26:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-19 07:26:42,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-11-19 07:26:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:26:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2022-11-19 07:26:42,404 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 44 [2022-11-19 07:26:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:42,404 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2022-11-19 07:26:42,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:26:42,405 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2022-11-19 07:26:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:26:42,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:42,411 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:42,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:42,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:42,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:42,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:42,623 INFO L85 PathProgramCache]: Analyzing trace with hash -865634876, now seen corresponding path program 1 times [2022-11-19 07:26:42,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:42,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318933960] [2022-11-19 07:26:42,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:42,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:42,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:42,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 07:26:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:42,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:26:42,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:42,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:42,753 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:42,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318933960] [2022-11-19 07:26:42,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318933960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:42,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:42,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:26:42,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673239638] [2022-11-19 07:26:42,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:42,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:26:42,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:42,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:26:42,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:26:42,755 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:26:42,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:42,862 INFO L93 Difference]: Finished difference Result 114 states and 162 transitions. [2022-11-19 07:26:42,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:26:42,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2022-11-19 07:26:42,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:42,867 INFO L225 Difference]: With dead ends: 114 [2022-11-19 07:26:42,869 INFO L226 Difference]: Without dead ends: 66 [2022-11-19 07:26:42,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:26:42,871 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 17 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:42,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 147 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:26:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-19 07:26:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2022-11-19 07:26:42,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:26:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2022-11-19 07:26:42,889 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 45 [2022-11-19 07:26:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:42,890 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2022-11-19 07:26:42,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:26:42,891 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2022-11-19 07:26:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:26:42,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:42,893 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:42,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:43,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:43,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:43,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:43,106 INFO L85 PathProgramCache]: Analyzing trace with hash 155611130, now seen corresponding path program 1 times [2022-11-19 07:26:43,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:43,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697815480] [2022-11-19 07:26:43,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:43,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:43,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:43,113 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:43,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 07:26:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:43,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:26:43,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:43,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:43,271 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697815480] [2022-11-19 07:26:43,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697815480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:43,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:43,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:26:43,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64827339] [2022-11-19 07:26:43,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:43,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:26:43,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:43,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:26:43,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:26:43,279 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:26:43,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:43,466 INFO L93 Difference]: Finished difference Result 122 states and 173 transitions. [2022-11-19 07:26:43,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:26:43,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-11-19 07:26:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:43,468 INFO L225 Difference]: With dead ends: 122 [2022-11-19 07:26:43,468 INFO L226 Difference]: Without dead ends: 73 [2022-11-19 07:26:43,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:26:43,470 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:43,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 194 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:26:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-19 07:26:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2022-11-19 07:26:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 49 states have internal predecessors, (67), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:26:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2022-11-19 07:26:43,487 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 46 [2022-11-19 07:26:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:43,488 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2022-11-19 07:26:43,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:26:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2022-11-19 07:26:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:26:43,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:43,492 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:43,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:43,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:43,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:43,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:43,694 INFO L85 PathProgramCache]: Analyzing trace with hash 709732423, now seen corresponding path program 1 times [2022-11-19 07:26:43,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:43,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809280561] [2022-11-19 07:26:43,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:43,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:43,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:43,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:43,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 07:26:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:43,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:26:43,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:43,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:44,085 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:44,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809280561] [2022-11-19 07:26:44,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809280561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:44,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2119705064] [2022-11-19 07:26:44,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:44,085 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:44,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:44,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:44,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 07:26:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:44,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:26:44,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:26:44,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:44,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2119705064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:44,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:26:44,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 9 [2022-11-19 07:26:44,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319163415] [2022-11-19 07:26:44,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:44,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:44,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:44,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:26:44,242 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:26:44,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:44,252 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-11-19 07:26:44,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:44,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-11-19 07:26:44,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:44,254 INFO L225 Difference]: With dead ends: 66 [2022-11-19 07:26:44,254 INFO L226 Difference]: Without dead ends: 57 [2022-11-19 07:26:44,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:26:44,256 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:44,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 124 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:26:44,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-19 07:26:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-19 07:26:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.375) internal successors, (66), 49 states have internal predecessors, (66), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:26:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-11-19 07:26:44,280 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 47 [2022-11-19 07:26:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:44,280 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-11-19 07:26:44,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:26:44,281 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-11-19 07:26:44,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 07:26:44,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:44,283 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:44,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:44,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:44,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:44,685 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:44,686 INFO L85 PathProgramCache]: Analyzing trace with hash -37920403, now seen corresponding path program 1 times [2022-11-19 07:26:44,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:44,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561179542] [2022-11-19 07:26:44,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:44,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:44,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:44,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:44,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-19 07:26:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:44,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:26:44,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:44,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:45,044 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:45,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561179542] [2022-11-19 07:26:45,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561179542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:45,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2074553015] [2022-11-19 07:26:45,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:45,045 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:45,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:45,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:45,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-19 07:26:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:45,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:26:45,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:26:45,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:45,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2074553015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:45,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:26:45,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-11-19 07:26:45,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255814636] [2022-11-19 07:26:45,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:45,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:26:45,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:45,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:26:45,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:26:45,217 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:26:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:45,260 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2022-11-19 07:26:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:26:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-11-19 07:26:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:45,265 INFO L225 Difference]: With dead ends: 67 [2022-11-19 07:26:45,265 INFO L226 Difference]: Without dead ends: 57 [2022-11-19 07:26:45,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:26:45,273 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:45,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 181 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:26:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-19 07:26:45,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-19 07:26:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:26:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2022-11-19 07:26:45,293 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 49 [2022-11-19 07:26:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:45,293 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2022-11-19 07:26:45,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:26:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2022-11-19 07:26:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 07:26:45,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:45,296 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:45,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:45,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:45,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:45,704 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:45,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:45,704 INFO L85 PathProgramCache]: Analyzing trace with hash -847267029, now seen corresponding path program 1 times [2022-11-19 07:26:45,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:45,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694140771] [2022-11-19 07:26:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:45,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:45,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:45,707 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:45,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-19 07:26:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:45,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:26:45,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:45,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:46,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:46,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694140771] [2022-11-19 07:26:46,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694140771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:46,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [521210164] [2022-11-19 07:26:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:46,045 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:46,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:46,047 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:46,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-19 07:26:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:46,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:26:46,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:26:46,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:46,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [521210164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:46,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:26:46,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 12 [2022-11-19 07:26:46,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474332996] [2022-11-19 07:26:46,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:46,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:26:46,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:46,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:26:46,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:26:46,250 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:26:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:46,343 INFO L93 Difference]: Finished difference Result 97 states and 132 transitions. [2022-11-19 07:26:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:26:46,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-11-19 07:26:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:46,345 INFO L225 Difference]: With dead ends: 97 [2022-11-19 07:26:46,345 INFO L226 Difference]: Without dead ends: 76 [2022-11-19 07:26:46,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:26:46,349 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 15 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:46,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 278 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:26:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-19 07:26:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2022-11-19 07:26:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.309090909090909) internal successors, (72), 57 states have internal predecessors, (72), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-19 07:26:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2022-11-19 07:26:46,367 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 49 [2022-11-19 07:26:46,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:46,369 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2022-11-19 07:26:46,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:26:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2022-11-19 07:26:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 07:26:46,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:46,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:46,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:46,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:46,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:46,776 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:46,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1434073043, now seen corresponding path program 1 times [2022-11-19 07:26:46,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:46,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184425923] [2022-11-19 07:26:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:46,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:46,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:46,778 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:46,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 07:26:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:46,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:26:46,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:46,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:47,078 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:47,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184425923] [2022-11-19 07:26:47,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184425923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:47,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1997745882] [2022-11-19 07:26:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:47,079 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:47,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:47,080 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:47,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-19 07:26:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:47,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:26:47,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:26:47,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:26:47,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1997745882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:47,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325131129] [2022-11-19 07:26:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:47,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:47,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:47,350 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:47,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:26:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:47,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:26:47,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:47,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:47,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325131129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:47,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:26:47,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 12 [2022-11-19 07:26:47,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395827338] [2022-11-19 07:26:47,576 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:26:47,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:26:47,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:47,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:26:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:26:47,577 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:26:48,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:48,219 INFO L93 Difference]: Finished difference Result 185 states and 269 transitions. [2022-11-19 07:26:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:26:48,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 49 [2022-11-19 07:26:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:48,222 INFO L225 Difference]: With dead ends: 185 [2022-11-19 07:26:48,222 INFO L226 Difference]: Without dead ends: 126 [2022-11-19 07:26:48,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:26:48,223 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 79 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:48,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 399 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:26:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-19 07:26:48,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2022-11-19 07:26:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 83 states have (on average 1.3493975903614457) internal successors, (112), 83 states have internal predecessors, (112), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-19 07:26:48,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-11-19 07:26:48,253 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 49 [2022-11-19 07:26:48,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:48,253 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-11-19 07:26:48,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 11 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:26:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-11-19 07:26:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:26:48,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:48,256 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:48,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:48,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-19 07:26:48,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:48,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:48,861 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:48,862 INFO L85 PathProgramCache]: Analyzing trace with hash -500635246, now seen corresponding path program 1 times [2022-11-19 07:26:48,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:48,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1799126172] [2022-11-19 07:26:48,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:48,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:48,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:48,864 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:48,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-19 07:26:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:48,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:26:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:48,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:49,142 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:49,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799126172] [2022-11-19 07:26:49,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799126172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:49,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1509923365] [2022-11-19 07:26:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:49,143 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:49,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:49,144 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:49,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-19 07:26:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:49,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:26:49,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:26:49,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:26:49,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1509923365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:49,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:26:49,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-19 07:26:49,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723673823] [2022-11-19 07:26:49,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:49,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:26:49,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:26:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:26:49,301 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:26:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:49,379 INFO L93 Difference]: Finished difference Result 118 states and 160 transitions. [2022-11-19 07:26:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:26:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-11-19 07:26:49,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:49,381 INFO L225 Difference]: With dead ends: 118 [2022-11-19 07:26:49,381 INFO L226 Difference]: Without dead ends: 112 [2022-11-19 07:26:49,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:26:49,382 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 22 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:49,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 225 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:26:49,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-19 07:26:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2022-11-19 07:26:49,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 98 states have internal predecessors, (128), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-19 07:26:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 152 transitions. [2022-11-19 07:26:49,399 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 152 transitions. Word has length 53 [2022-11-19 07:26:49,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:49,400 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 152 transitions. [2022-11-19 07:26:49,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:26:49,400 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 152 transitions. [2022-11-19 07:26:49,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:26:49,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:49,402 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:49,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:49,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:49,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:49,813 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:49,813 INFO L85 PathProgramCache]: Analyzing trace with hash -443376944, now seen corresponding path program 1 times [2022-11-19 07:26:49,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:49,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888665593] [2022-11-19 07:26:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:49,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:49,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:49,815 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:49,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-19 07:26:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:49,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:26:49,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:49,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:50,078 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888665593] [2022-11-19 07:26:50,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888665593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [310001312] [2022-11-19 07:26:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:50,078 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:50,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:50,083 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:50,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-19 07:26:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:50,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:26:50,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:50,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:50,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [310001312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:50,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288050762] [2022-11-19 07:26:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:50,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:50,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:50,348 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:50,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:26:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:50,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:26:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:26:50,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 07:26:50,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288050762] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:26:50,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-19 07:26:50,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6, 6, 6, 8] total 17 [2022-11-19 07:26:50,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329687714] [2022-11-19 07:26:50,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:50,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:26:50,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:50,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:26:50,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:26:50,623 INFO L87 Difference]: Start difference. First operand 110 states and 152 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:26:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:50,694 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2022-11-19 07:26:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:26:50,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-11-19 07:26:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:50,696 INFO L225 Difference]: With dead ends: 116 [2022-11-19 07:26:50,696 INFO L226 Difference]: Without dead ends: 99 [2022-11-19 07:26:50,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:26:50,698 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:50,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 290 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:26:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-19 07:26:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-19 07:26:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-19 07:26:50,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2022-11-19 07:26:50,717 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 53 [2022-11-19 07:26:50,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:50,718 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2022-11-19 07:26:50,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:26:50,718 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2022-11-19 07:26:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:26:50,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:50,721 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:50,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-19 07:26:50,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:51,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:51,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:51,327 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:51,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:51,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2015352415, now seen corresponding path program 1 times [2022-11-19 07:26:51,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:51,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937936402] [2022-11-19 07:26:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:51,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:51,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:51,329 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:51,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-19 07:26:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:51,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:26:51,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:51,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:51,613 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:51,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937936402] [2022-11-19 07:26:51,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937936402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:51,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1439403641] [2022-11-19 07:26:51,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:51,613 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:51,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:51,615 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:51,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-19 07:26:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:51,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:26:51,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:51,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:51,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1439403641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:51,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968614677] [2022-11-19 07:26:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:51,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:51,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:51,868 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:51,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:26:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:51,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:26:51,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:52,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:52,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968614677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:52,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:26:52,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 15 [2022-11-19 07:26:52,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508088199] [2022-11-19 07:26:52,191 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:26:52,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:26:52,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:52,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:26:52,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:26:52,193 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:26:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:52,596 INFO L93 Difference]: Finished difference Result 223 states and 308 transitions. [2022-11-19 07:26:52,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:26:52,599 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2022-11-19 07:26:52,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:52,600 INFO L225 Difference]: With dead ends: 223 [2022-11-19 07:26:52,600 INFO L226 Difference]: Without dead ends: 131 [2022-11-19 07:26:52,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:26:52,602 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 136 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:52,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 306 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:26:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-19 07:26:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2022-11-19 07:26:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.3186813186813187) internal successors, (120), 92 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-19 07:26:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2022-11-19 07:26:52,622 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 55 [2022-11-19 07:26:52,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:52,623 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2022-11-19 07:26:52,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:26:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2022-11-19 07:26:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-19 07:26:52,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:52,625 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:52,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:52,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:53,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-19 07:26:53,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:53,238 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:53,239 INFO L85 PathProgramCache]: Analyzing trace with hash 173315734, now seen corresponding path program 1 times [2022-11-19 07:26:53,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:53,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902844362] [2022-11-19 07:26:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:53,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:53,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:53,241 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:53,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-19 07:26:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:26:53,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:53,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:53,922 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:53,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902844362] [2022-11-19 07:26:53,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902844362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:53,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1023275583] [2022-11-19 07:26:53,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:53,923 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:53,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:53,924 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:53,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-19 07:26:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:54,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:26:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:54,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:54,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1023275583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:54,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196746655] [2022-11-19 07:26:54,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:54,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:54,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:54,371 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:54,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 07:26:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:54,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:26:54,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:54,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:55,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196746655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:55,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:26:55,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-11-19 07:26:55,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409395525] [2022-11-19 07:26:55,276 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:26:55,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:26:55,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:55,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:26:55,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:26:55,278 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:26:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:56,762 INFO L93 Difference]: Finished difference Result 270 states and 385 transitions. [2022-11-19 07:26:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:26:56,763 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-11-19 07:26:56,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:56,765 INFO L225 Difference]: With dead ends: 270 [2022-11-19 07:26:56,765 INFO L226 Difference]: Without dead ends: 174 [2022-11-19 07:26:56,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:26:56,766 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 311 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:56,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 526 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:26:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-19 07:26:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 117. [2022-11-19 07:26:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.361904761904762) internal successors, (143), 106 states have internal predecessors, (143), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-19 07:26:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2022-11-19 07:26:56,785 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 62 [2022-11-19 07:26:56,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:56,786 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2022-11-19 07:26:56,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:26:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2022-11-19 07:26:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 07:26:56,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:56,788 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:26:56,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:56,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-11-19 07:26:57,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:26:57,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:57,393 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:26:57,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:57,394 INFO L85 PathProgramCache]: Analyzing trace with hash 103329953, now seen corresponding path program 2 times [2022-11-19 07:26:57,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:26:57,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988476301] [2022-11-19 07:26:57,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:57,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:26:57,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:26:57,396 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:26:57,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-19 07:26:57,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:57,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:26:57,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:57,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:58,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:58,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988476301] [2022-11-19 07:26:58,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988476301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:58,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1346590512] [2022-11-19 07:26:58,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:58,023 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:58,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:58,027 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:58,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-19 07:26:58,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:58,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:26:58,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:58,224 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:58,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:58,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1346590512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:58,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125566232] [2022-11-19 07:26:58,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:26:58,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:58,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:58,408 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:58,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-19 07:26:58,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:26:58,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:26:58,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:26:58,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:26:58,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:26:59,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125566232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:59,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:26:59,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 27 [2022-11-19 07:26:59,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317004868] [2022-11-19 07:26:59,166 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:26:59,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 07:26:59,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:59,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 07:26:59,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2022-11-19 07:26:59,168 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:27:00,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:00,317 INFO L93 Difference]: Finished difference Result 293 states and 416 transitions. [2022-11-19 07:27:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 07:27:00,319 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-19 07:27:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:00,320 INFO L225 Difference]: With dead ends: 293 [2022-11-19 07:27:00,320 INFO L226 Difference]: Without dead ends: 183 [2022-11-19 07:27:00,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=581, Invalid=1059, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 07:27:00,322 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 389 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:00,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 631 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:27:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-19 07:27:00,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 127. [2022-11-19 07:27:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.391304347826087) internal successors, (160), 116 states have internal predecessors, (160), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-19 07:27:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 181 transitions. [2022-11-19 07:27:00,341 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 181 transitions. Word has length 67 [2022-11-19 07:27:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:00,342 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 181 transitions. [2022-11-19 07:27:00,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.037037037037037) internal successors, (109), 27 states have internal predecessors, (109), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:27:00,343 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 181 transitions. [2022-11-19 07:27:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-19 07:27:00,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:00,344 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:00,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:00,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-19 07:27:00,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-19 07:27:00,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:27:00,947 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:00,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:00,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1524110314, now seen corresponding path program 2 times [2022-11-19 07:27:00,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:27:00,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532420034] [2022-11-19 07:27:00,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:27:00,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:27:00,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:27:00,949 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:27:00,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-19 07:27:01,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:27:01,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:01,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:27:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:27:01,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:27:02,659 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:27:02,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532420034] [2022-11-19 07:27:02,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532420034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:02,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [201558542] [2022-11-19 07:27:02,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:27:02,659 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:27:02,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:27:02,660 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:27:02,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-19 07:27:02,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:27:02,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:02,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:27:02,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:27:02,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:27:03,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [201558542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:03,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531290392] [2022-11-19 07:27:03,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:27:03,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:03,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:03,303 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:03,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-19 07:27:03,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:27:03,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:03,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:27:03,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:27:03,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:27:05,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531290392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:05,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:27:05,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 38 [2022-11-19 07:27:05,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185474462] [2022-11-19 07:27:05,769 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 07:27:05,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:27:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 07:27:05,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:27:05,772 INFO L87 Difference]: Start difference. First operand 127 states and 181 transitions. Second operand has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:27:12,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:12,567 INFO L93 Difference]: Finished difference Result 396 states and 585 transitions. [2022-11-19 07:27:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 07:27:12,569 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2022-11-19 07:27:12,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:12,571 INFO L225 Difference]: With dead ends: 396 [2022-11-19 07:27:12,572 INFO L226 Difference]: Without dead ends: 276 [2022-11-19 07:27:12,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1210, Invalid=2330, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 07:27:12,574 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 747 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:12,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1767 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-19 07:27:12,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-19 07:27:12,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 153. [2022-11-19 07:27:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.4397163120567376) internal successors, (203), 142 states have internal predecessors, (203), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-19 07:27:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 224 transitions. [2022-11-19 07:27:12,615 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 224 transitions. Word has length 80 [2022-11-19 07:27:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:12,616 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 224 transitions. [2022-11-19 07:27:12,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:27:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 224 transitions. [2022-11-19 07:27:12,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-19 07:27:12,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:12,618 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:12,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:12,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:13,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-19 07:27:13,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:27:13,235 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:13,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:13,236 INFO L85 PathProgramCache]: Analyzing trace with hash 264388257, now seen corresponding path program 3 times [2022-11-19 07:27:13,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:27:13,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140333276] [2022-11-19 07:27:13,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:13,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:27:13,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:27:13,237 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:27:13,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-19 07:27:13,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-19 07:27:13,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:13,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:27:13,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:27:14,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:27:18,091 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:27:18,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140333276] [2022-11-19 07:27:18,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140333276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:18,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1629639420] [2022-11-19 07:27:18,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:18,092 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:27:18,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:27:18,099 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:27:18,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-19 07:27:18,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-19 07:27:18,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:18,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:27:18,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:27:31,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 10 proven. 283 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:27:32,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1629639420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:32,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39200901] [2022-11-19 07:27:32,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:32,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:32,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:32,612 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:32,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-19 07:27:32,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-19 07:27:32,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:32,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:27:32,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 26 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:27:35,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 4 proven. 283 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:27:38,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39200901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:38,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:27:38,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 25, 25, 19, 19] total 90 [2022-11-19 07:27:38,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444540708] [2022-11-19 07:27:38,131 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:38,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-19 07:27:38,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:27:38,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-19 07:27:38,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=7224, Unknown=6, NotChecked=0, Total=8010 [2022-11-19 07:27:38,135 INFO L87 Difference]: Start difference. First operand 153 states and 224 transitions. Second operand has 90 states, 90 states have (on average 2.966666666666667) internal successors, (267), 84 states have internal predecessors, (267), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-19 07:28:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:44,992 INFO L93 Difference]: Finished difference Result 599 states and 1047 transitions. [2022-11-19 07:28:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-11-19 07:28:44,994 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.966666666666667) internal successors, (267), 84 states have internal predecessors, (267), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2022-11-19 07:28:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:44,998 INFO L225 Difference]: With dead ends: 599 [2022-11-19 07:28:44,998 INFO L226 Difference]: Without dead ends: 447 [2022-11-19 07:28:45,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 475 SyntacticMatches, 17 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21675 ImplicationChecksByTransitivity, 75.7s TimeCoverageRelationStatistics Valid=10988, Invalid=53268, Unknown=6, NotChecked=0, Total=64262 [2022-11-19 07:28:45,013 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 3237 mSDsluCounter, 4012 mSDsCounter, 0 mSdLazyCounter, 8259 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3273 SdHoareTripleChecker+Valid, 4104 SdHoareTripleChecker+Invalid, 12746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 8259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4236 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:45,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3273 Valid, 4104 Invalid, 12746 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [251 Valid, 8259 Invalid, 0 Unknown, 4236 Unchecked, 11.8s Time] [2022-11-19 07:28:45,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-11-19 07:28:45,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 189. [2022-11-19 07:28:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 172 states have (on average 1.447674418604651) internal successors, (249), 176 states have internal predecessors, (249), 8 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (37), 9 states have call predecessors, (37), 7 states have call successors, (37) [2022-11-19 07:28:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 294 transitions. [2022-11-19 07:28:45,098 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 294 transitions. Word has length 91 [2022-11-19 07:28:45,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:45,099 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 294 transitions. [2022-11-19 07:28:45,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.966666666666667) internal successors, (267), 84 states have internal predecessors, (267), 5 states have call successors, (13), 2 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-19 07:28:45,099 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 294 transitions. [2022-11-19 07:28:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:28:45,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:45,102 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:45,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-19 07:28:45,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-19 07:28:45,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-11-19 07:28:45,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:28:45,713 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:45,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:45,714 INFO L85 PathProgramCache]: Analyzing trace with hash 861370134, now seen corresponding path program 3 times [2022-11-19 07:28:45,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:28:45,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393450212] [2022-11-19 07:28:45,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:28:45,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:28:45,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:28:45,716 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:28:45,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-19 07:28:45,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-19 07:28:45,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:45,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 07:28:45,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:28:47,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:28:54,214 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:28:54,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393450212] [2022-11-19 07:28:54,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393450212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:28:54,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1041179398] [2022-11-19 07:28:54,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:28:54,215 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:28:54,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:28:54,216 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:28:54,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-19 07:28:54,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-19 07:28:54,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:28:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:28:55,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:28:56,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1041179398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:28:56,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428702203] [2022-11-19 07:28:56,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:28:56,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:56,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:56,761 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:56,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-19 07:28:56,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-19 07:28:56,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:56,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:28:56,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:28:57,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:28:58,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428702203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:28:58,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:28:58,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 26, 26] total 54 [2022-11-19 07:28:58,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270003819] [2022-11-19 07:28:58,915 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:28:58,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-19 07:28:58,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:28:58,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-19 07:28:58,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=777, Invalid=2085, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 07:28:58,917 INFO L87 Difference]: Start difference. First operand 189 states and 294 transitions. Second operand has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:29:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:33,237 INFO L93 Difference]: Finished difference Result 665 states and 1141 transitions. [2022-11-19 07:29:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-19 07:29:33,244 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-11-19 07:29:33,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:33,251 INFO L225 Difference]: With dead ends: 665 [2022-11-19 07:29:33,251 INFO L226 Difference]: Without dead ends: 487 [2022-11-19 07:29:33,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 683 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=3174, Invalid=6726, Unknown=0, NotChecked=0, Total=9900 [2022-11-19 07:29:33,255 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 2398 mSDsluCounter, 5219 mSDsCounter, 0 mSdLazyCounter, 4356 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2398 SdHoareTripleChecker+Valid, 5425 SdHoareTripleChecker+Invalid, 4723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 4356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:33,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2398 Valid, 5425 Invalid, 4723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 4356 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2022-11-19 07:29:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-19 07:29:33,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 236. [2022-11-19 07:29:33,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 220 states have (on average 1.5) internal successors, (330), 223 states have internal predecessors, (330), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (32), 9 states have call predecessors, (32), 7 states have call successors, (32) [2022-11-19 07:29:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 370 transitions. [2022-11-19 07:29:33,351 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 370 transitions. Word has length 116 [2022-11-19 07:29:33,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:33,351 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 370 transitions. [2022-11-19 07:29:33,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.611111111111111) internal successors, (195), 54 states have internal predecessors, (195), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:29:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 370 transitions. [2022-11-19 07:29:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:29:33,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:33,354 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:33,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:33,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-19 07:29:33,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-11-19 07:29:33,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:29:33,966 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:33,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:33,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1103110160, now seen corresponding path program 1 times [2022-11-19 07:29:33,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:29:33,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493547867] [2022-11-19 07:29:33,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:33,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:33,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:29:33,968 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:29:33,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-19 07:29:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:34,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:29:34,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-19 07:29:34,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-19 07:29:34,179 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:29:34,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493547867] [2022-11-19 07:29:34,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493547867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:34,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1198677256] [2022-11-19 07:29:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:34,180 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:29:34,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:29:34,183 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:29:34,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-19 07:29:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:34,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:29:34,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-19 07:29:34,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-19 07:29:34,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1198677256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:34,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858992113] [2022-11-19 07:29:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:34,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:34,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:34,375 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:34,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-19 07:29:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:34,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:29:34,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-19 07:29:34,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2022-11-19 07:29:34,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858992113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:34,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:29:34,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 8 [2022-11-19 07:29:34,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343780603] [2022-11-19 07:29:34,561 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:34,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:29:34,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:29:34,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:29:34,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:29:34,564 INFO L87 Difference]: Start difference. First operand 236 states and 370 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:29:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:34,721 INFO L93 Difference]: Finished difference Result 252 states and 385 transitions. [2022-11-19 07:29:34,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:29:34,722 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2022-11-19 07:29:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:34,724 INFO L225 Difference]: With dead ends: 252 [2022-11-19 07:29:34,724 INFO L226 Difference]: Without dead ends: 226 [2022-11-19 07:29:34,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:29:34,726 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:34,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 390 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:34,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-19 07:29:34,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 218. [2022-11-19 07:29:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 203 states have (on average 1.5172413793103448) internal successors, (308), 207 states have internal predecessors, (308), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-19 07:29:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 336 transitions. [2022-11-19 07:29:34,783 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 336 transitions. Word has length 124 [2022-11-19 07:29:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:34,784 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 336 transitions. [2022-11-19 07:29:34,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:29:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 336 transitions. [2022-11-19 07:29:34,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:29:34,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:34,787 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:34,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:35,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:35,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:35,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:29:35,400 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1474812810, now seen corresponding path program 1 times [2022-11-19 07:29:35,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:29:35,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722143888] [2022-11-19 07:29:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:35,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:35,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:29:35,401 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:29:35,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-19 07:29:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:35,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:29:35,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2022-11-19 07:29:35,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:29:35,526 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:29:35,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722143888] [2022-11-19 07:29:35,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722143888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:35,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:35,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:29:35,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768932357] [2022-11-19 07:29:35,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:35,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:29:35,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:29:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:29:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:29:35,528 INFO L87 Difference]: Start difference. First operand 218 states and 336 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:29:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:35,640 INFO L93 Difference]: Finished difference Result 254 states and 378 transitions. [2022-11-19 07:29:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:29:35,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 125 [2022-11-19 07:29:35,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:35,642 INFO L225 Difference]: With dead ends: 254 [2022-11-19 07:29:35,643 INFO L226 Difference]: Without dead ends: 242 [2022-11-19 07:29:35,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:29:35,644 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 53 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:35,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 249 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:29:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-19 07:29:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 219. [2022-11-19 07:29:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 204 states have (on average 1.5147058823529411) internal successors, (309), 208 states have internal predecessors, (309), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-11-19 07:29:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 337 transitions. [2022-11-19 07:29:35,706 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 337 transitions. Word has length 125 [2022-11-19 07:29:35,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:35,707 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 337 transitions. [2022-11-19 07:29:35,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:29:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 337 transitions. [2022-11-19 07:29:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:29:35,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:35,709 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:35,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:35,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:35,921 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:35,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:35,922 INFO L85 PathProgramCache]: Analyzing trace with hash 888006796, now seen corresponding path program 4 times [2022-11-19 07:29:35,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:29:35,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669567408] [2022-11-19 07:29:35,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:29:35,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:29:35,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:29:35,923 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:29:35,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-19 07:29:36,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:29:36,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:36,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 07:29:36,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:29:39,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:29:46,340 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:29:46,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669567408] [2022-11-19 07:29:46,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669567408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:46,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [149794288] [2022-11-19 07:29:46,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:29:46,341 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:29:46,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:29:46,342 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:29:46,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-19 07:29:46,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:29:46,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:46,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 07:29:46,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:29:47,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:29:49,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [149794288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:49,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642091258] [2022-11-19 07:29:49,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:29:49,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:49,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:49,313 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:49,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-19 07:29:49,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:29:49,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:49,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 07:29:49,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:29:55,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:30:03,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642091258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:03,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:30:03,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 33, 33] total 122 [2022-11-19 07:30:03,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279782772] [2022-11-19 07:30:03,254 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:03,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-11-19 07:30:03,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:30:03,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-11-19 07:30:03,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2829, Invalid=11933, Unknown=0, NotChecked=0, Total=14762 [2022-11-19 07:30:03,259 INFO L87 Difference]: Start difference. First operand 219 states and 337 transitions. Second operand has 122 states, 122 states have (on average 2.9098360655737703) internal successors, (355), 119 states have internal predecessors, (355), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-19 07:31:35,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:35,811 INFO L93 Difference]: Finished difference Result 624 states and 1101 transitions. [2022-11-19 07:31:35,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-11-19 07:31:35,813 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.9098360655737703) internal successors, (355), 119 states have internal predecessors, (355), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 125 [2022-11-19 07:31:35,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:35,817 INFO L225 Difference]: With dead ends: 624 [2022-11-19 07:31:35,817 INFO L226 Difference]: Without dead ends: 603 [2022-11-19 07:31:35,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26570 ImplicationChecksByTransitivity, 95.9s TimeCoverageRelationStatistics Valid=19137, Invalid=69369, Unknown=0, NotChecked=0, Total=88506 [2022-11-19 07:31:35,828 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 5575 mSDsluCounter, 6075 mSDsCounter, 0 mSdLazyCounter, 7764 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5575 SdHoareTripleChecker+Valid, 6211 SdHoareTripleChecker+Invalid, 10794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 7764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2696 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:35,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5575 Valid, 6211 Invalid, 10794 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [334 Valid, 7764 Invalid, 0 Unknown, 2696 Unchecked, 12.8s Time] [2022-11-19 07:31:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-11-19 07:31:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 225. [2022-11-19 07:31:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 211 states have (on average 1.5260663507109005) internal successors, (322), 213 states have internal predecessors, (322), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-19 07:31:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 348 transitions. [2022-11-19 07:31:35,940 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 348 transitions. Word has length 125 [2022-11-19 07:31:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:35,942 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 348 transitions. [2022-11-19 07:31:35,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.9098360655737703) internal successors, (355), 119 states have internal predecessors, (355), 5 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-19 07:31:35,943 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 348 transitions. [2022-11-19 07:31:35,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 07:31:35,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:35,945 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:35,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:36,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-19 07:31:36,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:36,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:31:36,548 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:36,548 INFO L85 PathProgramCache]: Analyzing trace with hash 989289301, now seen corresponding path program 1 times [2022-11-19 07:31:36,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:31:36,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5229240] [2022-11-19 07:31:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:36,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:31:36,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:31:36,550 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:31:36,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-19 07:31:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:36,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:31:36,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2022-11-19 07:31:36,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:31:36,673 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:31:36,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5229240] [2022-11-19 07:31:36,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5229240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:36,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:36,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:31:36,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094355536] [2022-11-19 07:31:36,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:36,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:31:36,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:31:36,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:31:36,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:31:36,675 INFO L87 Difference]: Start difference. First operand 225 states and 348 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:31:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:36,801 INFO L93 Difference]: Finished difference Result 240 states and 363 transitions. [2022-11-19 07:31:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:31:36,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 126 [2022-11-19 07:31:36,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:36,804 INFO L225 Difference]: With dead ends: 240 [2022-11-19 07:31:36,804 INFO L226 Difference]: Without dead ends: 235 [2022-11-19 07:31:36,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:31:36,806 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 20 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:36,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 234 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:31:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-19 07:31:36,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2022-11-19 07:31:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 218 states have (on average 1.5091743119266054) internal successors, (329), 220 states have internal predecessors, (329), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-19 07:31:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 355 transitions. [2022-11-19 07:31:36,888 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 355 transitions. Word has length 126 [2022-11-19 07:31:36,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:36,889 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 355 transitions. [2022-11-19 07:31:36,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 07:31:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 355 transitions. [2022-11-19 07:31:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 07:31:36,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:36,891 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:36,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:37,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:31:37,103 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:37,103 INFO L85 PathProgramCache]: Analyzing trace with hash -531623995, now seen corresponding path program 1 times [2022-11-19 07:31:37,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:31:37,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649693199] [2022-11-19 07:31:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:37,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:31:37,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:31:37,105 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:31:37,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-19 07:31:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:37,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-19 07:31:37,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:31:40,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:41,590 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:31:41,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649693199] [2022-11-19 07:31:41,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649693199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:41,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1068894642] [2022-11-19 07:31:41,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:41,590 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:31:41,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:31:41,591 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:31:41,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-19 07:31:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:41,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-19 07:31:41,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:31:43,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:45,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1068894642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:45,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353156756] [2022-11-19 07:31:45,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:45,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:45,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:45,263 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:45,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-19 07:31:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:45,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 07:31:45,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:31:53,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:53,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353156756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:53,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:53,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 72 [2022-11-19 07:31:53,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849226661] [2022-11-19 07:31:53,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:53,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-19 07:31:53,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:31:53,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-19 07:31:53,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=6504, Unknown=0, NotChecked=0, Total=6806 [2022-11-19 07:31:53,720 INFO L87 Difference]: Start difference. First operand 232 states and 355 transitions. Second operand has 72 states, 72 states have (on average 2.8055555555555554) internal successors, (202), 70 states have internal predecessors, (202), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:32:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:21,124 INFO L93 Difference]: Finished difference Result 462 states and 732 transitions. [2022-11-19 07:32:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-19 07:32:21,125 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.8055555555555554) internal successors, (202), 70 states have internal predecessors, (202), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 127 [2022-11-19 07:32:21,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:21,129 INFO L225 Difference]: With dead ends: 462 [2022-11-19 07:32:21,129 INFO L226 Difference]: Without dead ends: 450 [2022-11-19 07:32:21,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 347 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=338, Invalid=7318, Unknown=0, NotChecked=0, Total=7656 [2022-11-19 07:32:21,132 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 275 mSDsluCounter, 9153 mSDsCounter, 0 mSdLazyCounter, 11957 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 9331 SdHoareTripleChecker+Invalid, 14550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2593 IncrementalHoareTripleChecker+Unchecked, 25.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:21,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 9331 Invalid, 14550 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 11957 Invalid, 0 Unknown, 2593 Unchecked, 25.3s Time] [2022-11-19 07:32:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-19 07:32:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 245. [2022-11-19 07:32:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 228 states have (on average 1.4956140350877194) internal successors, (341), 230 states have internal predecessors, (341), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 11 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-19 07:32:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 382 transitions. [2022-11-19 07:32:21,233 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 382 transitions. Word has length 127 [2022-11-19 07:32:21,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:21,233 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 382 transitions. [2022-11-19 07:32:21,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.8055555555555554) internal successors, (202), 70 states have internal predecessors, (202), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:32:21,234 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 382 transitions. [2022-11-19 07:32:21,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 07:32:21,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:21,236 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:21,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:21,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:21,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:21,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:21,851 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:21,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1811487673, now seen corresponding path program 1 times [2022-11-19 07:32:21,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:32:21,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448989621] [2022-11-19 07:32:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:21,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:32:21,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:32:21,853 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:32:21,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-19 07:32:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:21,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-19 07:32:21,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:32:25,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:26,629 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:32:26,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448989621] [2022-11-19 07:32:26,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448989621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:26,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1225997285] [2022-11-19 07:32:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:26,629 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:32:26,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:32:26,630 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:32:26,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-19 07:32:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:26,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-19 07:32:26,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:32:27,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:29,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1225997285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:29,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106302548] [2022-11-19 07:32:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:29,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:29,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:29,572 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:29,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-19 07:32:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:29,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-19 07:32:29,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:32:37,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:38,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106302548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:38,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:32:38,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 69 [2022-11-19 07:32:38,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837447381] [2022-11-19 07:32:38,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:32:38,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-19 07:32:38,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:32:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-19 07:32:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5898, Unknown=0, NotChecked=0, Total=6162 [2022-11-19 07:32:38,069 INFO L87 Difference]: Start difference. First operand 245 states and 382 transitions. Second operand has 69 states, 69 states have (on average 2.8260869565217392) internal successors, (195), 67 states have internal predecessors, (195), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:33:02,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:02,845 INFO L93 Difference]: Finished difference Result 448 states and 716 transitions. [2022-11-19 07:33:02,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-19 07:33:02,846 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.8260869565217392) internal successors, (195), 67 states have internal predecessors, (195), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 127 [2022-11-19 07:33:02,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:02,850 INFO L225 Difference]: With dead ends: 448 [2022-11-19 07:33:02,850 INFO L226 Difference]: Without dead ends: 436 [2022-11-19 07:33:02,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 351 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=318, Invalid=6822, Unknown=0, NotChecked=0, Total=7140 [2022-11-19 07:33:02,853 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 236 mSDsluCounter, 7619 mSDsCounter, 0 mSdLazyCounter, 10545 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 7787 SdHoareTripleChecker+Invalid, 12460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1915 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:02,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 7787 Invalid, 12460 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 10545 Invalid, 0 Unknown, 1915 Unchecked, 22.3s Time] [2022-11-19 07:33:02,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-19 07:33:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 245. [2022-11-19 07:33:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 228 states have (on average 1.4956140350877194) internal successors, (341), 230 states have internal predecessors, (341), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 11 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-19 07:33:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 382 transitions. [2022-11-19 07:33:02,964 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 382 transitions. Word has length 127 [2022-11-19 07:33:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:02,965 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 382 transitions. [2022-11-19 07:33:02,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.8260869565217392) internal successors, (195), 67 states have internal predecessors, (195), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:33:02,965 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 382 transitions. [2022-11-19 07:33:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-19 07:33:02,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:02,968 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:33:02,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:03,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:03,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:03,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:03,580 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:03,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:03,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1954234437, now seen corresponding path program 2 times [2022-11-19 07:33:03,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:33:03,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992564124] [2022-11-19 07:33:03,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:33:03,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:33:03,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:33:03,582 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:33:03,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-19 07:33:03,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:33:03,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:33:03,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-19 07:33:03,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:07,386 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:33:07,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:08,340 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:33:08,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992564124] [2022-11-19 07:33:08,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992564124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:08,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [192654036] [2022-11-19 07:33:08,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:33:08,342 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:33:08,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:33:08,343 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:33:08,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-19 07:33:08,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:33:08,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:33:08,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-19 07:33:08,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:33:09,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:09,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [192654036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:09,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614319759] [2022-11-19 07:33:09,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:33:09,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:09,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:09,586 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:09,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-19 07:33:09,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:33:09,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:33:09,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-19 07:33:09,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:33:16,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:16,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614319759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:16,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:33:16,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 69 [2022-11-19 07:33:16,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121567935] [2022-11-19 07:33:16,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:33:16,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-19 07:33:16,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:33:16,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-19 07:33:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5183, Unknown=0, NotChecked=0, Total=5402 [2022-11-19 07:33:16,718 INFO L87 Difference]: Start difference. First operand 245 states and 382 transitions. Second operand has 69 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 67 states have internal predecessors, (196), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:33:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:38,581 INFO L93 Difference]: Finished difference Result 457 states and 725 transitions. [2022-11-19 07:33:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-19 07:33:38,582 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 67 states have internal predecessors, (196), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 128 [2022-11-19 07:33:38,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:38,585 INFO L225 Difference]: With dead ends: 457 [2022-11-19 07:33:38,585 INFO L226 Difference]: Without dead ends: 443 [2022-11-19 07:33:38,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 362 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=248, Invalid=5914, Unknown=0, NotChecked=0, Total=6162 [2022-11-19 07:33:38,588 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 260 mSDsluCounter, 7985 mSDsCounter, 0 mSdLazyCounter, 10415 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 8161 SdHoareTripleChecker+Invalid, 12554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2139 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:38,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 8161 Invalid, 12554 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 10415 Invalid, 0 Unknown, 2139 Unchecked, 20.2s Time] [2022-11-19 07:33:38,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-19 07:33:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 247. [2022-11-19 07:33:38,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 230 states have (on average 1.491304347826087) internal successors, (343), 232 states have internal predecessors, (343), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 11 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-19 07:33:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 384 transitions. [2022-11-19 07:33:38,687 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 384 transitions. Word has length 128 [2022-11-19 07:33:38,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:38,688 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 384 transitions. [2022-11-19 07:33:38,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 67 states have internal predecessors, (196), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:33:38,688 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 384 transitions. [2022-11-19 07:33:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-19 07:33:38,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:38,690 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:33:38,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:38,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-11-19 07:33:39,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-19 07:33:39,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:39,302 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:39,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:39,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1319664505, now seen corresponding path program 1 times [2022-11-19 07:33:39,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:33:39,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742820363] [2022-11-19 07:33:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:39,303 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:33:39,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:33:39,304 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:33:39,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-19 07:33:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:39,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-19 07:33:39,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:33:43,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:45,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:33:45,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742820363] [2022-11-19 07:33:45,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742820363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:45,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2107232045] [2022-11-19 07:33:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:45,069 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:33:45,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:33:45,071 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:33:45,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-19 07:33:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:45,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-19 07:33:45,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:33:46,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:46,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2107232045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:46,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608369838] [2022-11-19 07:33:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:46,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:46,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:46,859 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:46,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-19 07:33:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:46,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-19 07:33:46,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:33:54,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:33:55,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608369838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:55,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:33:55,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 69 [2022-11-19 07:33:55,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665728072] [2022-11-19 07:33:55,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:33:55,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-19 07:33:55,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:33:55,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-19 07:33:55,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=5319, Unknown=0, NotChecked=0, Total=5550 [2022-11-19 07:33:55,092 INFO L87 Difference]: Start difference. First operand 247 states and 384 transitions. Second operand has 69 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 67 states have internal predecessors, (196), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:34:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:19,278 INFO L93 Difference]: Finished difference Result 445 states and 711 transitions. [2022-11-19 07:34:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-19 07:34:19,279 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 67 states have internal predecessors, (196), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 128 [2022-11-19 07:34:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:19,282 INFO L225 Difference]: With dead ends: 445 [2022-11-19 07:34:19,282 INFO L226 Difference]: Without dead ends: 431 [2022-11-19 07:34:19,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 358 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=262, Invalid=6058, Unknown=0, NotChecked=0, Total=6320 [2022-11-19 07:34:19,284 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 223 mSDsluCounter, 7724 mSDsCounter, 0 mSdLazyCounter, 11267 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 7896 SdHoareTripleChecker+Invalid, 12842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1575 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:19,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 7896 Invalid, 12842 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 11267 Invalid, 0 Unknown, 1575 Unchecked, 22.5s Time] [2022-11-19 07:34:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-19 07:34:19,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 245. [2022-11-19 07:34:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 228 states have (on average 1.4912280701754386) internal successors, (340), 230 states have internal predecessors, (340), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 11 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-19 07:34:19,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 381 transitions. [2022-11-19 07:34:19,378 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 381 transitions. Word has length 128 [2022-11-19 07:34:19,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:19,379 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 381 transitions. [2022-11-19 07:34:19,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.8405797101449277) internal successors, (196), 67 states have internal predecessors, (196), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 07:34:19,379 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 381 transitions. [2022-11-19 07:34:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-19 07:34:19,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:19,381 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:19,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:19,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-19 07:34:19,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-19 07:34:19,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:34:19,987 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:19,987 INFO L85 PathProgramCache]: Analyzing trace with hash 602401121, now seen corresponding path program 1 times [2022-11-19 07:34:19,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:34:19,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484831353] [2022-11-19 07:34:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:19,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:34:19,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:34:19,989 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:34:19,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-19 07:34:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:20,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-19 07:34:20,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 840 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:34:47,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:33,255 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:35:33,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484831353] [2022-11-19 07:35:33,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484831353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:33,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1069083833] [2022-11-19 07:35:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:33,256 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:35:33,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:35:33,257 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:35:33,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-19 07:35:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:33,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-19 07:35:33,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 16 proven. 836 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:37:30,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:38:08,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1069083833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:08,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659201687] [2022-11-19 07:38:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:08,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:08,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:08,562 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:08,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5291923-4aae-46ed-98bb-2e2df28ae9df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-19 07:38:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:08,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-19 07:38:08,690 INFO L286 TraceCheckSpWp]: Computing forward predicates...