./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur --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 0a05a45e59c4449e0f919ee265abbb6a4949f64a9be713d749d79d0baffd63df --- 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-38b53e6 [2022-11-26 00:04:00,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:04:00,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:04:00,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:04:00,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:04:00,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:04:00,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:04:00,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:04:00,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:04:00,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:04:00,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:04:00,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:04:00,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:04:00,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:04:00,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:04:00,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:04:00,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:04:00,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:04:00,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:04:00,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:04:00,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:04:00,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:04:00,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:04:00,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:04:00,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:04:00,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:04:00,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:04:00,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:04:00,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:04:00,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:04:00,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:04:00,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:04:00,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:04:00,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:04:00,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:04:00,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:04:00,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:04:00,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:04:00,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:04:00,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:04:00,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:04:00,963 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:04:00,998 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:04:01,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:04:01,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:04:01,002 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:04:01,003 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:04:01,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:04:01,003 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:04:01,003 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:04:01,004 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:04:01,004 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:04:01,005 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:04:01,005 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:04:01,005 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:04:01,006 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:04:01,006 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:04:01,006 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:04:01,006 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:04:01,007 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:04:01,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:04:01,008 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:04:01,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:04:01,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:04:01,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:04:01,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:04:01,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:04:01,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:04:01,009 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:04:01,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:04:01,010 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:04:01,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:04:01,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:04:01,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:04:01,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:04:01,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:04:01,012 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:04:01,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:04:01,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:04:01,012 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:04:01,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:04:01,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:04:01,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:04:01,013 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_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a05a45e59c4449e0f919ee265abbb6a4949f64a9be713d749d79d0baffd63df [2022-11-26 00:04:01,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:04:01,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:04:01,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:04:01,349 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:04:01,349 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:04:01,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2022-11-26 00:04:04,531 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:04:04,845 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:04:04,846 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2022-11-26 00:04:04,855 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/data/53947f6d3/3be1c36448ff4f739c0821a53f299fc9/FLAG26d9b40fb [2022-11-26 00:04:04,870 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/data/53947f6d3/3be1c36448ff4f739c0821a53f299fc9 [2022-11-26 00:04:04,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:04:04,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:04:04,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:04:04,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:04:04,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:04:04,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:04" (1/1) ... [2022-11-26 00:04:04,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b7af66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:04, skipping insertion in model container [2022-11-26 00:04:04,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:04" (1/1) ... [2022-11-26 00:04:04,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:04:04,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:04:05,318 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c[14577,14590] [2022-11-26 00:04:05,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:04:05,340 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:04:05,441 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c[14577,14590] [2022-11-26 00:04:05,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:04:05,472 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:04:05,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:05 WrapperNode [2022-11-26 00:04:05,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:04:05,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:04:05,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:04:05,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:04:05,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:05" (1/1) ... [2022-11-26 00:04:05,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:05" (1/1) ... [2022-11-26 00:04:05,526 INFO L138 Inliner]: procedures = 32, calls = 47, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 480 [2022-11-26 00:04:05,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:04:05,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:04:05,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:04:05,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:04:05,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:05" (1/1) ... [2022-11-26 00:04:05,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:05" (1/1) ... [2022-11-26 00:04:05,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:05" (1/1) ... [2022-11-26 00:04:05,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:05" (1/1) ... [2022-11-26 00:04:05,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:05" (1/1) ... [2022-11-26 00:04:05,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:05" (1/1) ... [2022-11-26 00:04:05,563 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:05" (1/1) ... [2022-11-26 00:04:05,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:05" (1/1) ... [2022-11-26 00:04:05,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:04:05,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:04:05,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:04:05,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:04:05,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:05" (1/1) ... [2022-11-26 00:04:05,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:04:05,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:05,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:04:05,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:04:05,674 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-11-26 00:04:05,674 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-11-26 00:04:05,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:04:05,675 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-11-26 00:04:05,675 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-11-26 00:04:05,675 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-26 00:04:05,675 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-26 00:04:05,675 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:04:05,676 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:04:05,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:04:05,676 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-11-26 00:04:05,676 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-11-26 00:04:05,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:04:05,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:04:05,677 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-11-26 00:04:05,677 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-11-26 00:04:05,823 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:04:05,825 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:04:06,560 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:04:06,805 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:04:06,805 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:04:06,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:06 BoogieIcfgContainer [2022-11-26 00:04:06,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:04:06,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:04:06,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:04:06,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:04:06,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:04:04" (1/3) ... [2022-11-26 00:04:06,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c3c9fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:06, skipping insertion in model container [2022-11-26 00:04:06,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:05" (2/3) ... [2022-11-26 00:04:06,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c3c9fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:06, skipping insertion in model container [2022-11-26 00:04:06,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:06" (3/3) ... [2022-11-26 00:04:06,822 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2022-11-26 00:04:06,842 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:04:06,843 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:04:06,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:04:06,921 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;@b72f2e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:04:06,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:04:06,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 106 states have internal predecessors, (159), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-26 00:04:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:04:06,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:06,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:06,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:06,945 INFO L85 PathProgramCache]: Analyzing trace with hash -621799585, now seen corresponding path program 1 times [2022-11-26 00:04:06,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:06,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356252441] [2022-11-26 00:04:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:06,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:04:07,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:07,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356252441] [2022-11-26 00:04:07,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356252441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:07,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:07,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:04:07,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135652325] [2022-11-26 00:04:07,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:07,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:04:07,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:07,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:04:07,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:04:07,538 INFO L87 Difference]: Start difference. First operand has 141 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 106 states have internal predecessors, (159), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:04:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:07,670 INFO L93 Difference]: Finished difference Result 282 states and 461 transitions. [2022-11-26 00:04:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:04:07,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-26 00:04:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:07,684 INFO L225 Difference]: With dead ends: 282 [2022-11-26 00:04:07,684 INFO L226 Difference]: Without dead ends: 144 [2022-11-26 00:04:07,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:04:07,695 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 5 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:07,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 593 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:04:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-26 00:04:07,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-11-26 00:04:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.4953271028037383) internal successors, (160), 108 states have internal predecessors, (160), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-26 00:04:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 218 transitions. [2022-11-26 00:04:07,784 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 218 transitions. Word has length 19 [2022-11-26 00:04:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:07,785 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 218 transitions. [2022-11-26 00:04:07,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:04:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 218 transitions. [2022-11-26 00:04:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-26 00:04:07,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:07,787 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:04:07,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:04:07,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1437511571, now seen corresponding path program 1 times [2022-11-26 00:04:07,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:07,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166527396] [2022-11-26 00:04:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:07,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:04:07,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:07,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166527396] [2022-11-26 00:04:07,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166527396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:07,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:07,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:04:07,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465227603] [2022-11-26 00:04:07,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:07,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:04:07,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:07,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:04:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:04:07,989 INFO L87 Difference]: Start difference. First operand 144 states and 218 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:04:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:08,330 INFO L93 Difference]: Finished difference Result 402 states and 621 transitions. [2022-11-26 00:04:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:04:08,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-11-26 00:04:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:08,334 INFO L225 Difference]: With dead ends: 402 [2022-11-26 00:04:08,334 INFO L226 Difference]: Without dead ends: 261 [2022-11-26 00:04:08,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:04:08,337 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 521 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:08,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 549 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:04:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-26 00:04:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2022-11-26 00:04:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 131 states have (on average 1.4885496183206106) internal successors, (195), 131 states have internal predecessors, (195), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-26 00:04:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 255 transitions. [2022-11-26 00:04:08,368 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 255 transitions. Word has length 30 [2022-11-26 00:04:08,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:08,368 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 255 transitions. [2022-11-26 00:04:08,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:04:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 255 transitions. [2022-11-26 00:04:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 00:04:08,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:08,370 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:04:08,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:04:08,371 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:08,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:08,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1628500186, now seen corresponding path program 1 times [2022-11-26 00:04:08,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:08,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363789904] [2022-11-26 00:04:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:08,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:04:08,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:08,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363789904] [2022-11-26 00:04:08,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363789904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:08,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:08,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:04:08,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500495840] [2022-11-26 00:04:08,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:08,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:04:08,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:08,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:04:08,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:04:08,521 INFO L87 Difference]: Start difference. First operand 170 states and 255 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:04:08,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:08,827 INFO L93 Difference]: Finished difference Result 402 states and 619 transitions. [2022-11-26 00:04:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:04:08,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-11-26 00:04:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:08,833 INFO L225 Difference]: With dead ends: 402 [2022-11-26 00:04:08,833 INFO L226 Difference]: Without dead ends: 261 [2022-11-26 00:04:08,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:04:08,842 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 517 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:08,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 552 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:04:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-26 00:04:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2022-11-26 00:04:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 131 states have (on average 1.4809160305343512) internal successors, (194), 131 states have internal predecessors, (194), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-26 00:04:08,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 254 transitions. [2022-11-26 00:04:08,892 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 254 transitions. Word has length 31 [2022-11-26 00:04:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:08,892 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 254 transitions. [2022-11-26 00:04:08,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:04:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 254 transitions. [2022-11-26 00:04:08,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:04:08,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:08,895 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:04:08,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:04:08,896 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:08,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:08,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1610746453, now seen corresponding path program 1 times [2022-11-26 00:04:08,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:08,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630052944] [2022-11-26 00:04:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:08,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:04:09,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:09,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630052944] [2022-11-26 00:04:09,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630052944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:09,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:09,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:04:09,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494323289] [2022-11-26 00:04:09,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:09,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:04:09,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:09,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:04:09,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:04:09,195 INFO L87 Difference]: Start difference. First operand 170 states and 254 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:04:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:09,286 INFO L93 Difference]: Finished difference Result 316 states and 475 transitions. [2022-11-26 00:04:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:04:09,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-11-26 00:04:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:09,289 INFO L225 Difference]: With dead ends: 316 [2022-11-26 00:04:09,289 INFO L226 Difference]: Without dead ends: 175 [2022-11-26 00:04:09,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:04:09,301 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 6 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:09,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 605 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:04:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-26 00:04:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-11-26 00:04:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 135 states have (on average 1.4666666666666666) internal successors, (198), 135 states have internal predecessors, (198), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-26 00:04:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 258 transitions. [2022-11-26 00:04:09,331 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 258 transitions. Word has length 33 [2022-11-26 00:04:09,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:09,332 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 258 transitions. [2022-11-26 00:04:09,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:04:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 258 transitions. [2022-11-26 00:04:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:04:09,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:09,342 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-11-26 00:04:09,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:04:09,343 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:09,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:09,344 INFO L85 PathProgramCache]: Analyzing trace with hash -693743727, now seen corresponding path program 1 times [2022-11-26 00:04:09,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:09,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656717260] [2022-11-26 00:04:09,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:09,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:04:09,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:09,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656717260] [2022-11-26 00:04:09,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656717260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:09,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:09,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:04:09,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759590960] [2022-11-26 00:04:09,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:09,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:04:09,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:09,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:04:09,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:04:09,621 INFO L87 Difference]: Start difference. First operand 175 states and 258 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:04:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:09,707 INFO L93 Difference]: Finished difference Result 326 states and 486 transitions. [2022-11-26 00:04:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:04:09,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-11-26 00:04:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:09,709 INFO L225 Difference]: With dead ends: 326 [2022-11-26 00:04:09,710 INFO L226 Difference]: Without dead ends: 180 [2022-11-26 00:04:09,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:04:09,711 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 6 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:09,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 591 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:04:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-26 00:04:09,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-11-26 00:04:09,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 139 states have (on average 1.4532374100719425) internal successors, (202), 139 states have internal predecessors, (202), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-26 00:04:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 262 transitions. [2022-11-26 00:04:09,729 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 262 transitions. Word has length 41 [2022-11-26 00:04:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:09,730 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 262 transitions. [2022-11-26 00:04:09,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:04:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 262 transitions. [2022-11-26 00:04:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 00:04:09,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:09,731 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:09,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:04:09,732 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:09,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1402099173, now seen corresponding path program 1 times [2022-11-26 00:04:09,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:09,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051406292] [2022-11-26 00:04:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:09,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:04:09,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:09,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051406292] [2022-11-26 00:04:09,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051406292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:09,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:09,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:04:09,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653724147] [2022-11-26 00:04:09,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:09,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:04:09,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:09,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:04:09,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:04:09,893 INFO L87 Difference]: Start difference. First operand 180 states and 262 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:04:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:09,992 INFO L93 Difference]: Finished difference Result 335 states and 490 transitions. [2022-11-26 00:04:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:04:09,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2022-11-26 00:04:09,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:09,995 INFO L225 Difference]: With dead ends: 335 [2022-11-26 00:04:09,995 INFO L226 Difference]: Without dead ends: 184 [2022-11-26 00:04:09,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:04:09,997 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 5 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:09,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 600 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:04:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-26 00:04:10,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-11-26 00:04:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 142 states have (on average 1.443661971830986) internal successors, (205), 142 states have internal predecessors, (205), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-26 00:04:10,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 265 transitions. [2022-11-26 00:04:10,024 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 265 transitions. Word has length 49 [2022-11-26 00:04:10,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:10,024 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 265 transitions. [2022-11-26 00:04:10,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:04:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 265 transitions. [2022-11-26 00:04:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 00:04:10,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:10,027 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:10,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:04:10,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:10,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:10,028 INFO L85 PathProgramCache]: Analyzing trace with hash 994360130, now seen corresponding path program 1 times [2022-11-26 00:04:10,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:10,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810069270] [2022-11-26 00:04:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:10,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:04:10,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:10,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810069270] [2022-11-26 00:04:10,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810069270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:10,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:10,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:04:10,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393784552] [2022-11-26 00:04:10,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:10,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:04:10,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:10,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:04:10,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:04:10,256 INFO L87 Difference]: Start difference. First operand 184 states and 265 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:04:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:10,342 INFO L93 Difference]: Finished difference Result 344 states and 500 transitions. [2022-11-26 00:04:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:04:10,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2022-11-26 00:04:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:10,345 INFO L225 Difference]: With dead ends: 344 [2022-11-26 00:04:10,345 INFO L226 Difference]: Without dead ends: 189 [2022-11-26 00:04:10,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:04:10,347 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 6 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:10,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 591 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:04:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-26 00:04:10,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-11-26 00:04:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 146 states have (on average 1.4315068493150684) internal successors, (209), 146 states have internal predecessors, (209), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-26 00:04:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2022-11-26 00:04:10,368 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 49 [2022-11-26 00:04:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:10,370 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2022-11-26 00:04:10,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-26 00:04:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2022-11-26 00:04:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 00:04:10,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:10,375 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:10,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:04:10,376 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:10,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:10,377 INFO L85 PathProgramCache]: Analyzing trace with hash -837012826, now seen corresponding path program 1 times [2022-11-26 00:04:10,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:10,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052246842] [2022-11-26 00:04:10,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:10,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:04:10,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:10,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052246842] [2022-11-26 00:04:10,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052246842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:10,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:10,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:04:10,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204352046] [2022-11-26 00:04:10,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:10,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:04:10,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:10,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:04:10,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:04:10,633 INFO L87 Difference]: Start difference. First operand 189 states and 269 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:04:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:10,704 INFO L93 Difference]: Finished difference Result 355 states and 507 transitions. [2022-11-26 00:04:10,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:04:10,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 57 [2022-11-26 00:04:10,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:10,711 INFO L225 Difference]: With dead ends: 355 [2022-11-26 00:04:10,712 INFO L226 Difference]: Without dead ends: 195 [2022-11-26 00:04:10,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:04:10,714 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 7 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:10,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 602 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:04:10,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-26 00:04:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-11-26 00:04:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 151 states have (on average 1.4172185430463575) internal successors, (214), 151 states have internal predecessors, (214), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-26 00:04:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 274 transitions. [2022-11-26 00:04:10,736 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 274 transitions. Word has length 57 [2022-11-26 00:04:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:10,737 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 274 transitions. [2022-11-26 00:04:10,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:04:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 274 transitions. [2022-11-26 00:04:10,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-26 00:04:10,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:10,739 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:10,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:04:10,739 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1386269671, now seen corresponding path program 1 times [2022-11-26 00:04:10,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:10,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717463512] [2022-11-26 00:04:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:10,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:04:11,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:11,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717463512] [2022-11-26 00:04:11,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717463512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:04:11,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411531345] [2022-11-26 00:04:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:11,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:11,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:11,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:04:11,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:04:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:04:11,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:04:11,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:04:11,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411531345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:11,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:04:11,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-26 00:04:11,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220669142] [2022-11-26 00:04:11,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:11,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:04:11,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:11,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:04:11,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:04:11,613 INFO L87 Difference]: Start difference. First operand 195 states and 274 transitions. Second operand has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:04:11,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:11,923 INFO L93 Difference]: Finished difference Result 566 states and 787 transitions. [2022-11-26 00:04:11,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:04:11,924 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 60 [2022-11-26 00:04:11,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:11,926 INFO L225 Difference]: With dead ends: 566 [2022-11-26 00:04:11,926 INFO L226 Difference]: Without dead ends: 374 [2022-11-26 00:04:11,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:04:11,928 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 207 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:11,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 1098 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:04:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-26 00:04:11,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 371. [2022-11-26 00:04:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 285 states have (on average 1.407017543859649) internal successors, (401), 286 states have internal predecessors, (401), 59 states have call successors, (59), 26 states have call predecessors, (59), 26 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2022-11-26 00:04:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 519 transitions. [2022-11-26 00:04:11,973 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 519 transitions. Word has length 60 [2022-11-26 00:04:11,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:11,973 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 519 transitions. [2022-11-26 00:04:11,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:04:11,974 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 519 transitions. [2022-11-26 00:04:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-26 00:04:11,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:11,975 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:11,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:04:12,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:12,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:12,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:12,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1016926634, now seen corresponding path program 1 times [2022-11-26 00:04:12,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:12,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053551792] [2022-11-26 00:04:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:12,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:04:12,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:12,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053551792] [2022-11-26 00:04:12,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053551792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:04:12,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042986931] [2022-11-26 00:04:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:12,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:12,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:12,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:04:12,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:04:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:12,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:04:12,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:04:13,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:04:13,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042986931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:13,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1890027517] [2022-11-26 00:04:13,514 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-11-26 00:04:13,514 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:04:13,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:04:13,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:04:13,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:04:18,430 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:04:18,470 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:04:18,501 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:04:18,582 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:04:37,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1890027517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:37,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:04:37,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-11-26 00:04:37,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014204066] [2022-11-26 00:04:37,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:37,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:04:37,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:04:37,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:04:37,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:04:37,732 INFO L87 Difference]: Start difference. First operand 371 states and 519 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:04:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:44,889 INFO L93 Difference]: Finished difference Result 802 states and 1132 transitions. [2022-11-26 00:04:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:04:44,896 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2022-11-26 00:04:44,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:44,904 INFO L225 Difference]: With dead ends: 802 [2022-11-26 00:04:44,904 INFO L226 Difference]: Without dead ends: 456 [2022-11-26 00:04:44,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:04:44,906 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 147 mSDsluCounter, 3027 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 3311 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:44,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 3311 Invalid, 2081 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-26 00:04:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-11-26 00:04:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 433. [2022-11-26 00:04:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 329 states have (on average 1.3799392097264438) internal successors, (454), 330 states have internal predecessors, (454), 74 states have call successors, (74), 29 states have call predecessors, (74), 29 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-26 00:04:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 602 transitions. [2022-11-26 00:04:45,001 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 602 transitions. Word has length 62 [2022-11-26 00:04:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:45,002 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 602 transitions. [2022-11-26 00:04:45,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:04:45,003 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 602 transitions. [2022-11-26 00:04:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-26 00:04:45,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:45,004 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:04:45,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:04:45,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:04:45,205 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:04:45,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:45,206 INFO L85 PathProgramCache]: Analyzing trace with hash -905474981, now seen corresponding path program 1 times [2022-11-26 00:04:45,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:04:45,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693794659] [2022-11-26 00:04:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:45,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:04:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:04:45,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:04:45,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693794659] [2022-11-26 00:04:45,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693794659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:04:45,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319352574] [2022-11-26 00:04:45,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:45,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:04:45,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:45,622 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:04:45,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:04:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:45,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:04:45,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:04:46,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:04:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:04:46,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319352574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:04:46,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039028247] [2022-11-26 00:04:46,262 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-11-26 00:04:46,263 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:04:46,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:04:46,263 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:04:46,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:04:48,712 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:04:48,750 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:04:48,780 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:04:48,849 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:05:06,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1039028247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:06,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:05:06,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-11-26 00:05:06,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971517585] [2022-11-26 00:05:06,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:06,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:05:06,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:06,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:05:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:05:06,054 INFO L87 Difference]: Start difference. First operand 433 states and 602 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:05:12,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:12,224 INFO L93 Difference]: Finished difference Result 845 states and 1187 transitions. [2022-11-26 00:05:12,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:05:12,225 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2022-11-26 00:05:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:12,227 INFO L225 Difference]: With dead ends: 845 [2022-11-26 00:05:12,228 INFO L226 Difference]: Without dead ends: 506 [2022-11-26 00:05:12,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:05:12,230 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 60 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:12,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 2955 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-26 00:05:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-11-26 00:05:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 483. [2022-11-26 00:05:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 362 states have (on average 1.3646408839779005) internal successors, (494), 363 states have internal predecessors, (494), 88 states have call successors, (88), 32 states have call predecessors, (88), 32 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2022-11-26 00:05:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 670 transitions. [2022-11-26 00:05:12,348 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 670 transitions. Word has length 62 [2022-11-26 00:05:12,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:12,348 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 670 transitions. [2022-11-26 00:05:12,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:05:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 670 transitions. [2022-11-26 00:05:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-26 00:05:12,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:12,351 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:12,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:12,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:12,557 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:12,557 INFO L85 PathProgramCache]: Analyzing trace with hash 638152030, now seen corresponding path program 1 times [2022-11-26 00:05:12,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:12,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485006043] [2022-11-26 00:05:12,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:12,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:05:12,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:12,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485006043] [2022-11-26 00:05:12,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485006043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:05:12,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361095664] [2022-11-26 00:05:12,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:12,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:12,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:12,990 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:13,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:05:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:13,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:05:13,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:05:13,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:05:13,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361095664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:13,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458070936] [2022-11-26 00:05:13,598 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2022-11-26 00:05:13,598 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:05:13,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:05:13,600 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:05:13,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:05:16,809 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-26 00:05:16,836 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-26 00:05:16,854 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-26 00:05:16,900 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:05:37,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1458070936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:37,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:05:37,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [9, 9, 9] total 38 [2022-11-26 00:05:37,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038656080] [2022-11-26 00:05:37,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:37,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:05:37,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:05:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:05:37,674 INFO L87 Difference]: Start difference. First operand 483 states and 670 transitions. Second operand has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:05:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:44,558 INFO L93 Difference]: Finished difference Result 895 states and 1258 transitions. [2022-11-26 00:05:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:05:44,559 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 64 [2022-11-26 00:05:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:44,562 INFO L225 Difference]: With dead ends: 895 [2022-11-26 00:05:44,562 INFO L226 Difference]: Without dead ends: 556 [2022-11-26 00:05:44,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:05:44,564 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 136 mSDsluCounter, 3148 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 3447 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:44,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 3447 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-26 00:05:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-11-26 00:05:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 507. [2022-11-26 00:05:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 378 states have (on average 1.3465608465608465) internal successors, (509), 379 states have internal predecessors, (509), 94 states have call successors, (94), 34 states have call predecessors, (94), 34 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-26 00:05:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 697 transitions. [2022-11-26 00:05:44,675 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 697 transitions. Word has length 64 [2022-11-26 00:05:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:44,675 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 697 transitions. [2022-11-26 00:05:44,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:05:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 697 transitions. [2022-11-26 00:05:44,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-26 00:05:44,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:44,677 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:44,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:44,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:44,883 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash -213509607, now seen corresponding path program 1 times [2022-11-26 00:05:44,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:44,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858739500] [2022-11-26 00:05:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:44,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:05:45,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:45,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858739500] [2022-11-26 00:05:45,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858739500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:45,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:45,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:05:45,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728184817] [2022-11-26 00:05:45,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:45,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:05:45,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:45,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:05:45,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:05:45,033 INFO L87 Difference]: Start difference. First operand 507 states and 697 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-26 00:05:45,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:45,223 INFO L93 Difference]: Finished difference Result 906 states and 1272 transitions. [2022-11-26 00:05:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:05:45,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2022-11-26 00:05:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:45,229 INFO L225 Difference]: With dead ends: 906 [2022-11-26 00:05:45,229 INFO L226 Difference]: Without dead ends: 515 [2022-11-26 00:05:45,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:05:45,232 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 5 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:45,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 600 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:05:45,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-11-26 00:05:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2022-11-26 00:05:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 384 states have (on average 1.3411458333333333) internal successors, (515), 385 states have internal predecessors, (515), 94 states have call successors, (94), 36 states have call predecessors, (94), 36 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-26 00:05:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 703 transitions. [2022-11-26 00:05:45,377 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 703 transitions. Word has length 66 [2022-11-26 00:05:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:45,378 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 703 transitions. [2022-11-26 00:05:45,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-26 00:05:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 703 transitions. [2022-11-26 00:05:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:05:45,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:45,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:45,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:05:45,380 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:45,381 INFO L85 PathProgramCache]: Analyzing trace with hash 670785818, now seen corresponding path program 1 times [2022-11-26 00:05:45,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:45,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419910361] [2022-11-26 00:05:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:45,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:05:45,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:45,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419910361] [2022-11-26 00:05:45,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419910361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:05:45,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576961071] [2022-11-26 00:05:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:45,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:45,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:45,808 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:45,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:05:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:45,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:05:45,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:05:46,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:05:46,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576961071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:46,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282791840] [2022-11-26 00:05:46,412 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2022-11-26 00:05:46,412 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:05:46,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:05:46,413 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:05:46,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:05:51,602 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 231 for LOIs [2022-11-26 00:05:51,852 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-26 00:05:51,883 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 182 for LOIs [2022-11-26 00:05:52,035 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 154 for LOIs [2022-11-26 00:05:52,075 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-26 00:05:52,128 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:05:52,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:06:44,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15790#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s2p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~s2s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~s1s1_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256)))) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (not (= (mod ~side2Failed~0 256) 0)) (= assert_~arg |assert_#in~arg|) (not (= (mod ~side1Failed_History_1~0 256) 0)) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= 0 ~manual_selection_History_2~0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side1_written~0 1) (= ~s1s2~0 0) (= ~nomsg~0 ~s2p_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256))) ~s1s2_old~0) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= ~s1p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256)))) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~nomsg~0 ~side2_written~0) (<= ~manual_selection_History_2~0 0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (= ~nomsg~0 ~s2s2_new~0) (= (mod ~side1Failed~0 256) 0) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256))) ~s2s1_old~0) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:06:44,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:06:44,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:06:44,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-26 00:06:44,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910404990] [2022-11-26 00:06:44,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:44,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:06:44,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:44,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:06:44,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2619, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:06:44,695 INFO L87 Difference]: Start difference. First operand 515 states and 703 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-26 00:06:45,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:45,470 INFO L93 Difference]: Finished difference Result 1236 states and 1718 transitions. [2022-11-26 00:06:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:06:45,471 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 70 [2022-11-26 00:06:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:45,475 INFO L225 Difference]: With dead ends: 1236 [2022-11-26 00:06:45,475 INFO L226 Difference]: Without dead ends: 853 [2022-11-26 00:06:45,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 150 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 52.7s TimeCoverageRelationStatistics Valid=397, Invalid=3143, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 00:06:45,478 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 295 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:45,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 2369 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:06:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-11-26 00:06:45,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 532. [2022-11-26 00:06:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 394 states have (on average 1.2944162436548223) internal successors, (510), 396 states have internal predecessors, (510), 92 states have call successors, (92), 45 states have call predecessors, (92), 45 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-26 00:06:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 694 transitions. [2022-11-26 00:06:45,649 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 694 transitions. Word has length 70 [2022-11-26 00:06:45,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:45,650 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 694 transitions. [2022-11-26 00:06:45,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-26 00:06:45,650 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 694 transitions. [2022-11-26 00:06:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:06:45,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:45,652 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-26 00:06:45,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:45,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:06:45,858 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:45,859 INFO L85 PathProgramCache]: Analyzing trace with hash -757200530, now seen corresponding path program 1 times [2022-11-26 00:06:45,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:45,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055278336] [2022-11-26 00:06:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:45,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:06:46,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:46,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055278336] [2022-11-26 00:06:46,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055278336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:46,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:46,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:06:46,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353337303] [2022-11-26 00:06:46,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:46,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:06:46,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:46,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:06:46,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:06:46,204 INFO L87 Difference]: Start difference. First operand 532 states and 694 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:06:47,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:47,161 INFO L93 Difference]: Finished difference Result 1170 states and 1609 transitions. [2022-11-26 00:06:47,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:06:47,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 71 [2022-11-26 00:06:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:47,166 INFO L225 Difference]: With dead ends: 1170 [2022-11-26 00:06:47,166 INFO L226 Difference]: Without dead ends: 876 [2022-11-26 00:06:47,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:06:47,168 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 515 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:47,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 2248 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:06:47,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-11-26 00:06:47,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 671. [2022-11-26 00:06:47,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 496 states have (on average 1.3064516129032258) internal successors, (648), 499 states have internal predecessors, (648), 116 states have call successors, (116), 58 states have call predecessors, (116), 58 states have return successors, (116), 113 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-26 00:06:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 880 transitions. [2022-11-26 00:06:47,360 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 880 transitions. Word has length 71 [2022-11-26 00:06:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:47,360 INFO L495 AbstractCegarLoop]: Abstraction has 671 states and 880 transitions. [2022-11-26 00:06:47,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:06:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 880 transitions. [2022-11-26 00:06:47,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:06:47,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:47,362 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-26 00:06:47,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:06:47,362 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:47,363 INFO L85 PathProgramCache]: Analyzing trace with hash -99513804, now seen corresponding path program 1 times [2022-11-26 00:06:47,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:47,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9772496] [2022-11-26 00:06:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:47,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:06:47,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:47,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9772496] [2022-11-26 00:06:47,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9772496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:47,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:47,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:06:47,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523985628] [2022-11-26 00:06:47,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:47,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:06:47,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:47,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:06:47,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:06:47,620 INFO L87 Difference]: Start difference. First operand 671 states and 880 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:06:48,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:48,616 INFO L93 Difference]: Finished difference Result 1540 states and 2122 transitions. [2022-11-26 00:06:48,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:06:48,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2022-11-26 00:06:48,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:48,623 INFO L225 Difference]: With dead ends: 1540 [2022-11-26 00:06:48,623 INFO L226 Difference]: Without dead ends: 1211 [2022-11-26 00:06:48,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:06:48,626 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 733 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:48,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 1389 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:06:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-11-26 00:06:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 927. [2022-11-26 00:06:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 679 states have (on average 1.3136966126656848) internal successors, (892), 684 states have internal predecessors, (892), 165 states have call successors, (165), 82 states have call predecessors, (165), 82 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) [2022-11-26 00:06:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1222 transitions. [2022-11-26 00:06:48,935 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1222 transitions. Word has length 73 [2022-11-26 00:06:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:48,935 INFO L495 AbstractCegarLoop]: Abstraction has 927 states and 1222 transitions. [2022-11-26 00:06:48,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-26 00:06:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1222 transitions. [2022-11-26 00:06:48,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 00:06:48,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:48,937 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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, 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] [2022-11-26 00:06:48,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:06:48,937 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:48,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:48,938 INFO L85 PathProgramCache]: Analyzing trace with hash -837446945, now seen corresponding path program 1 times [2022-11-26 00:06:48,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:48,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271994725] [2022-11-26 00:06:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:48,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:06:49,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:49,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271994725] [2022-11-26 00:06:49,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271994725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:49,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269070905] [2022-11-26 00:06:49,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:49,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:49,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:49,311 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:49,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:06:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:49,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:06:49,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:06:49,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:49,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269070905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:49,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:06:49,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-26 00:06:49,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794846309] [2022-11-26 00:06:49,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:49,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:06:49,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:49,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:06:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:06:49,611 INFO L87 Difference]: Start difference. First operand 927 states and 1222 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:06:50,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:50,433 INFO L93 Difference]: Finished difference Result 1783 states and 2415 transitions. [2022-11-26 00:06:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:06:50,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2022-11-26 00:06:50,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:50,439 INFO L225 Difference]: With dead ends: 1783 [2022-11-26 00:06:50,439 INFO L226 Difference]: Without dead ends: 1090 [2022-11-26 00:06:50,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:06:50,442 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 485 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:50,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1561 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:06:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-11-26 00:06:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 927. [2022-11-26 00:06:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 679 states have (on average 1.3078055964653903) internal successors, (888), 684 states have internal predecessors, (888), 165 states have call successors, (165), 82 states have call predecessors, (165), 82 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) [2022-11-26 00:06:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1218 transitions. [2022-11-26 00:06:50,768 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1218 transitions. Word has length 77 [2022-11-26 00:06:50,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:50,769 INFO L495 AbstractCegarLoop]: Abstraction has 927 states and 1218 transitions. [2022-11-26 00:06:50,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:06:50,769 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1218 transitions. [2022-11-26 00:06:50,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 00:06:50,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:50,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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, 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] [2022-11-26 00:06:50,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:50,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 00:06:51,003 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:51,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:51,003 INFO L85 PathProgramCache]: Analyzing trace with hash -117293042, now seen corresponding path program 1 times [2022-11-26 00:06:51,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:51,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240936246] [2022-11-26 00:06:51,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:51,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:06:51,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:51,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240936246] [2022-11-26 00:06:51,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240936246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:51,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038939685] [2022-11-26 00:06:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:51,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:51,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:51,358 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:51,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:06:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:51,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:06:51,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:06:51,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:06:51,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038939685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:51,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467991973] [2022-11-26 00:06:51,759 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-26 00:06:51,759 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:51,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:51,760 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:51,760 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:55,892 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:06:55,931 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:06:55,948 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-26 00:06:56,058 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:06:56,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:07:26,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [467991973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:07:26,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:07:26,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [8, 9, 9] total 47 [2022-11-26 00:07:26,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908940783] [2022-11-26 00:07:26,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:07:26,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-26 00:07:26,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:26,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-26 00:07:26,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:07:26,906 INFO L87 Difference]: Start difference. First operand 927 states and 1218 transitions. Second operand has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-26 00:07:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:34,633 INFO L93 Difference]: Finished difference Result 1489 states and 1977 transitions. [2022-11-26 00:07:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-26 00:07:34,634 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 77 [2022-11-26 00:07:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:34,638 INFO L225 Difference]: With dead ends: 1489 [2022-11-26 00:07:34,638 INFO L226 Difference]: Without dead ends: 913 [2022-11-26 00:07:34,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2022-11-26 00:07:34,641 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 134 mSDsluCounter, 2799 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 3013 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:34,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 3013 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-26 00:07:34,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-11-26 00:07:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 913. [2022-11-26 00:07:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 669 states have (on average 1.3064275037369208) internal successors, (874), 674 states have internal predecessors, (874), 162 states have call successors, (162), 81 states have call predecessors, (162), 81 states have return successors, (162), 157 states have call predecessors, (162), 162 states have call successors, (162) [2022-11-26 00:07:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1198 transitions. [2022-11-26 00:07:34,926 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1198 transitions. Word has length 77 [2022-11-26 00:07:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:34,926 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1198 transitions. [2022-11-26 00:07:34,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-26 00:07:34,927 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1198 transitions. [2022-11-26 00:07:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 00:07:34,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:34,930 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-26 00:07:34,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:07:35,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:35,136 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:07:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2012814036, now seen corresponding path program 1 times [2022-11-26 00:07:35,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:35,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916211470] [2022-11-26 00:07:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:35,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:07:35,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:35,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916211470] [2022-11-26 00:07:35,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916211470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:07:35,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:07:35,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:07:35,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003287483] [2022-11-26 00:07:35,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:07:35,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:07:35,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:35,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:07:35,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:07:35,389 INFO L87 Difference]: Start difference. First operand 913 states and 1198 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-26 00:07:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:35,900 INFO L93 Difference]: Finished difference Result 1201 states and 1645 transitions. [2022-11-26 00:07:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:07:35,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 80 [2022-11-26 00:07:35,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:35,907 INFO L225 Difference]: With dead ends: 1201 [2022-11-26 00:07:35,907 INFO L226 Difference]: Without dead ends: 1199 [2022-11-26 00:07:35,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:07:35,909 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 155 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:35,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1465 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:07:35,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-11-26 00:07:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 914. [2022-11-26 00:07:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 668 states have (on average 1.3068862275449102) internal successors, (873), 674 states have internal predecessors, (873), 163 states have call successors, (163), 82 states have call predecessors, (163), 82 states have return successors, (163), 157 states have call predecessors, (163), 163 states have call successors, (163) [2022-11-26 00:07:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1199 transitions. [2022-11-26 00:07:36,216 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1199 transitions. Word has length 80 [2022-11-26 00:07:36,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:36,217 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1199 transitions. [2022-11-26 00:07:36,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-26 00:07:36,217 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1199 transitions. [2022-11-26 00:07:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-26 00:07:36,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:36,219 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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, 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] [2022-11-26 00:07:36,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-26 00:07:36,219 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:07:36,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:36,220 INFO L85 PathProgramCache]: Analyzing trace with hash 786573589, now seen corresponding path program 1 times [2022-11-26 00:07:36,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:36,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020039306] [2022-11-26 00:07:36,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:36,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:07:36,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:36,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020039306] [2022-11-26 00:07:36,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020039306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:07:36,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:07:36,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:07:36,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179558587] [2022-11-26 00:07:36,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:07:36,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:07:36,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:36,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:07:36,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:07:36,420 INFO L87 Difference]: Start difference. First operand 914 states and 1199 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-26 00:07:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:36,704 INFO L93 Difference]: Finished difference Result 1566 states and 2070 transitions. [2022-11-26 00:07:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:07:36,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 83 [2022-11-26 00:07:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:36,709 INFO L225 Difference]: With dead ends: 1566 [2022-11-26 00:07:36,709 INFO L226 Difference]: Without dead ends: 902 [2022-11-26 00:07:36,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:07:36,712 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 7 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:36,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 592 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:07:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-11-26 00:07:36,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 902. [2022-11-26 00:07:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 662 states have (on average 1.2824773413897281) internal successors, (849), 668 states have internal predecessors, (849), 157 states have call successors, (157), 82 states have call predecessors, (157), 82 states have return successors, (157), 151 states have call predecessors, (157), 157 states have call successors, (157) [2022-11-26 00:07:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1163 transitions. [2022-11-26 00:07:36,956 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1163 transitions. Word has length 83 [2022-11-26 00:07:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:36,956 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 1163 transitions. [2022-11-26 00:07:36,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-26 00:07:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1163 transitions. [2022-11-26 00:07:36,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-26 00:07:36,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:36,959 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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, 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] [2022-11-26 00:07:36,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-26 00:07:36,959 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:07:36,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:36,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1870460879, now seen corresponding path program 1 times [2022-11-26 00:07:36,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:36,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739827254] [2022-11-26 00:07:36,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:36,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:07:37,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:37,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739827254] [2022-11-26 00:07:37,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739827254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:07:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002872847] [2022-11-26 00:07:37,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:37,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:37,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:07:37,293 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:07:37,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:07:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:37,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:07:37,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:07:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:07:37,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:07:37,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002872847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:07:37,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455855666] [2022-11-26 00:07:37,721 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-26 00:07:37,721 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:07:37,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:07:37,722 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:07:37,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:07:41,797 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:07:41,820 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-26 00:07:41,842 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-26 00:07:41,961 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 152 for LOIs [2022-11-26 00:07:42,010 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:07:42,058 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:08:22,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1455855666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:08:22,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:08:22,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-11-26 00:08:22,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303230604] [2022-11-26 00:08:22,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:08:22,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:08:22,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:08:22,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:08:22,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:08:22,416 INFO L87 Difference]: Start difference. First operand 902 states and 1163 transitions. Second operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-26 00:08:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:08:33,612 INFO L93 Difference]: Finished difference Result 1515 states and 1985 transitions. [2022-11-26 00:08:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-26 00:08:33,613 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 85 [2022-11-26 00:08:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:08:33,617 INFO L225 Difference]: With dead ends: 1515 [2022-11-26 00:08:33,617 INFO L226 Difference]: Without dead ends: 944 [2022-11-26 00:08:33,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 200 SyntacticMatches, 13 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 41.6s TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:08:33,620 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 217 mSDsluCounter, 4256 mSDsCounter, 0 mSdLazyCounter, 3768 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 4520 SdHoareTripleChecker+Invalid, 3827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:08:33,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 4520 Invalid, 3827 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [59 Valid, 3768 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-11-26 00:08:33,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-11-26 00:08:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 905. [2022-11-26 00:08:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 664 states have (on average 1.2816265060240963) internal successors, (851), 670 states have internal predecessors, (851), 158 states have call successors, (158), 82 states have call predecessors, (158), 82 states have return successors, (158), 152 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-26 00:08:33,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1167 transitions. [2022-11-26 00:08:33,918 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1167 transitions. Word has length 85 [2022-11-26 00:08:33,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:08:33,919 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1167 transitions. [2022-11-26 00:08:33,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-26 00:08:33,919 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1167 transitions. [2022-11-26 00:08:33,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-26 00:08:33,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:08:33,921 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 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, 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] [2022-11-26 00:08:33,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-26 00:08:34,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:34,127 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:08:34,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:08:34,127 INFO L85 PathProgramCache]: Analyzing trace with hash -644472428, now seen corresponding path program 1 times [2022-11-26 00:08:34,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:08:34,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650114220] [2022-11-26 00:08:34,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:34,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:08:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:08:34,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:08:34,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650114220] [2022-11-26 00:08:34,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650114220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:08:34,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147394259] [2022-11-26 00:08:34,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:34,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:34,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:34,537 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:08:34,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:08:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:34,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:08:34,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:08:35,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:08:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:08:35,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147394259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:08:35,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045014375] [2022-11-26 00:08:35,194 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-26 00:08:35,194 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:08:35,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:08:35,194 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:08:35,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:08:39,457 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 241 for LOIs [2022-11-26 00:08:39,679 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:08:39,696 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 123 for LOIs [2022-11-26 00:08:39,810 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 157 for LOIs [2022-11-26 00:08:39,874 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-11-26 00:08:39,923 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:08:39,970 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:09:34,748 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41524#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (not (= (mod ~side1Failed_History_0~0 256) 0)) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2p_old~0) (<= 0 ~manual_selection_History_2~0) (= ~side2_written~0 0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= ~manual_selection_History_2~0 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256)))) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:09:34,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:09:34,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:09:34,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-26 00:09:34,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980674027] [2022-11-26 00:09:34,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:09:34,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:09:34,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:09:34,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:09:34,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=3149, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 00:09:34,752 INFO L87 Difference]: Start difference. First operand 905 states and 1167 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-26 00:09:35,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:09:35,627 INFO L93 Difference]: Finished difference Result 1858 states and 2462 transitions. [2022-11-26 00:09:35,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:09:35,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 85 [2022-11-26 00:09:35,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:09:35,635 INFO L225 Difference]: With dead ends: 1858 [2022-11-26 00:09:35,635 INFO L226 Difference]: Without dead ends: 1131 [2022-11-26 00:09:35,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 189 SyntacticMatches, 15 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 55.0s TimeCoverageRelationStatistics Valid=439, Invalid=3721, Unknown=0, NotChecked=0, Total=4160 [2022-11-26 00:09:35,639 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 217 mSDsluCounter, 2799 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 3107 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:09:35,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 3107 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:09:35,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-11-26 00:09:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 884. [2022-11-26 00:09:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 649 states have (on average 1.2742681047765794) internal successors, (827), 655 states have internal predecessors, (827), 152 states have call successors, (152), 82 states have call predecessors, (152), 82 states have return successors, (152), 146 states have call predecessors, (152), 152 states have call successors, (152) [2022-11-26 00:09:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1131 transitions. [2022-11-26 00:09:35,964 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1131 transitions. Word has length 85 [2022-11-26 00:09:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:09:35,965 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1131 transitions. [2022-11-26 00:09:35,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-26 00:09:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1131 transitions. [2022-11-26 00:09:35,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 00:09:35,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:09:35,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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, 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] [2022-11-26 00:09:35,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:09:36,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-26 00:09:36,173 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:09:36,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:09:36,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1802678683, now seen corresponding path program 1 times [2022-11-26 00:09:36,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:09:36,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277629383] [2022-11-26 00:09:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:36,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:09:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:09:36,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:09:36,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277629383] [2022-11-26 00:09:36,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277629383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:09:36,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308787882] [2022-11-26 00:09:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:09:36,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:36,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:36,523 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:36,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:09:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:09:36,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:09:36,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:09:36,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:09:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:09:36,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308787882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:09:36,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1462261306] [2022-11-26 00:09:36,942 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-26 00:09:36,943 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:09:36,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:09:36,943 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:09:36,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:09:40,116 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-26 00:09:40,154 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-26 00:09:40,183 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-11-26 00:09:40,270 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-26 00:09:40,331 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-26 00:09:40,376 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:10:24,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1462261306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:10:24,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:10:24,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [8, 9, 9] total 55 [2022-11-26 00:10:24,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176336010] [2022-11-26 00:10:24,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:10:24,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-26 00:10:24,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:10:24,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-26 00:10:24,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2722, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:10:24,424 INFO L87 Difference]: Start difference. First operand 884 states and 1131 transitions. Second operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-26 00:10:35,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:10:35,797 INFO L93 Difference]: Finished difference Result 1479 states and 1926 transitions. [2022-11-26 00:10:35,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-26 00:10:35,797 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 87 [2022-11-26 00:10:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:10:35,800 INFO L225 Difference]: With dead ends: 1479 [2022-11-26 00:10:35,800 INFO L226 Difference]: Without dead ends: 919 [2022-11-26 00:10:35,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 203 SyntacticMatches, 14 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=265, Invalid=2927, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:10:35,803 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 138 mSDsluCounter, 4705 mSDsCounter, 0 mSdLazyCounter, 3694 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 4999 SdHoareTripleChecker+Invalid, 3740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:10:35,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 4999 Invalid, 3740 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [46 Valid, 3694 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-11-26 00:10:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-11-26 00:10:36,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 887. [2022-11-26 00:10:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 651 states have (on average 1.273425499231951) internal successors, (829), 657 states have internal predecessors, (829), 153 states have call successors, (153), 82 states have call predecessors, (153), 82 states have return successors, (153), 147 states have call predecessors, (153), 153 states have call successors, (153) [2022-11-26 00:10:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1135 transitions. [2022-11-26 00:10:36,121 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1135 transitions. Word has length 87 [2022-11-26 00:10:36,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:10:36,122 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1135 transitions. [2022-11-26 00:10:36,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-26 00:10:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1135 transitions. [2022-11-26 00:10:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-26 00:10:36,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:10:36,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 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, 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] [2022-11-26 00:10:36,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:10:36,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-26 00:10:36,340 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:10:36,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:10:36,340 INFO L85 PathProgramCache]: Analyzing trace with hash -761547315, now seen corresponding path program 1 times [2022-11-26 00:10:36,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:10:36,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903803229] [2022-11-26 00:10:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:36,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:10:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:10:36,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:10:36,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903803229] [2022-11-26 00:10:36,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903803229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:10:36,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677017146] [2022-11-26 00:10:36,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:10:36,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:10:36,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:10:36,702 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:10:36,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:10:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:10:36,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:10:36,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:10:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:10:36,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:10:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:10:37,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677017146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:10:37,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [6799277] [2022-11-26 00:10:37,128 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-26 00:10:37,128 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:10:37,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:10:37,129 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:10:37,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:10:40,836 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-26 00:10:40,860 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-26 00:10:40,880 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-26 00:10:40,993 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 202 for LOIs [2022-11-26 00:10:41,481 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-26 00:10:41,529 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:11:29,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [6799277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:29,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:11:29,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-11-26 00:11:29,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257598354] [2022-11-26 00:11:29,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:29,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-26 00:11:29,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-26 00:11:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:11:29,673 INFO L87 Difference]: Start difference. First operand 887 states and 1135 transitions. Second operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-26 00:11:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:40,451 INFO L93 Difference]: Finished difference Result 1469 states and 1909 transitions. [2022-11-26 00:11:40,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-26 00:11:40,451 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 92 [2022-11-26 00:11:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:40,455 INFO L225 Difference]: With dead ends: 1469 [2022-11-26 00:11:40,456 INFO L226 Difference]: Without dead ends: 909 [2022-11-26 00:11:40,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 221 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 49.4s TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:11:40,458 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 130 mSDsluCounter, 3729 mSDsCounter, 0 mSdLazyCounter, 3488 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 3967 SdHoareTripleChecker+Invalid, 3528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:40,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 3967 Invalid, 3528 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [40 Valid, 3488 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-26 00:11:40,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-26 00:11:40,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 874. [2022-11-26 00:11:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 642 states have (on average 1.2710280373831775) internal successors, (816), 648 states have internal predecessors, (816), 149 states have call successors, (149), 82 states have call predecessors, (149), 82 states have return successors, (149), 143 states have call predecessors, (149), 149 states have call successors, (149) [2022-11-26 00:11:40,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1114 transitions. [2022-11-26 00:11:40,681 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1114 transitions. Word has length 92 [2022-11-26 00:11:40,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:40,681 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1114 transitions. [2022-11-26 00:11:40,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-26 00:11:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1114 transitions. [2022-11-26 00:11:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-26 00:11:40,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:40,683 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 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, 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] [2022-11-26 00:11:40,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:40,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:40,890 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:40,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:40,890 INFO L85 PathProgramCache]: Analyzing trace with hash -778050491, now seen corresponding path program 1 times [2022-11-26 00:11:40,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:40,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194507193] [2022-11-26 00:11:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:40,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-26 00:11:41,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:41,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194507193] [2022-11-26 00:11:41,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194507193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:11:41,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:11:41,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:11:41,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342734547] [2022-11-26 00:11:41,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:11:41,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:11:41,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:11:41,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:11:41,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:11:41,109 INFO L87 Difference]: Start difference. First operand 874 states and 1114 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-26 00:11:41,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:41,421 INFO L93 Difference]: Finished difference Result 1487 states and 1919 transitions. [2022-11-26 00:11:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:11:41,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 92 [2022-11-26 00:11:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:41,425 INFO L225 Difference]: With dead ends: 1487 [2022-11-26 00:11:41,425 INFO L226 Difference]: Without dead ends: 862 [2022-11-26 00:11:41,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:11:41,428 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 7 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:41,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 574 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:11:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-11-26 00:11:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2022-11-26 00:11:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 636 states have (on average 1.2452830188679245) internal successors, (792), 642 states have internal predecessors, (792), 143 states have call successors, (143), 82 states have call predecessors, (143), 82 states have return successors, (143), 137 states have call predecessors, (143), 143 states have call successors, (143) [2022-11-26 00:11:41,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1078 transitions. [2022-11-26 00:11:41,644 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1078 transitions. Word has length 92 [2022-11-26 00:11:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:41,644 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1078 transitions. [2022-11-26 00:11:41,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-26 00:11:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1078 transitions. [2022-11-26 00:11:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-26 00:11:41,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:41,647 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 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, 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] [2022-11-26 00:11:41,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-26 00:11:41,647 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:11:41,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:41,648 INFO L85 PathProgramCache]: Analyzing trace with hash -370958719, now seen corresponding path program 1 times [2022-11-26 00:11:41,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:11:41,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967546815] [2022-11-26 00:11:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:41,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:11:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:11:42,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:11:42,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967546815] [2022-11-26 00:11:42,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967546815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:11:42,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830548969] [2022-11-26 00:11:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:11:42,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:42,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:42,003 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:42,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:11:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:11:42,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:11:42,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:11:42,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:11:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:11:42,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830548969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:11:42,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101678772] [2022-11-26 00:11:42,409 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-26 00:11:42,409 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:11:42,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:11:42,410 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:11:42,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:11:45,702 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-26 00:11:45,726 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-26 00:11:45,745 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 198 for LOIs [2022-11-26 00:11:46,109 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 193 for LOIs [2022-11-26 00:11:46,488 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-26 00:11:46,532 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:36,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1101678772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:36,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:12:36,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-11-26 00:12:36,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513951967] [2022-11-26 00:12:36,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:36,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-26 00:12:36,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:36,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-26 00:12:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2830, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:12:36,554 INFO L87 Difference]: Start difference. First operand 862 states and 1078 transitions. Second operand has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-26 00:12:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:49,234 INFO L93 Difference]: Finished difference Result 1449 states and 1849 transitions. [2022-11-26 00:12:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-26 00:12:49,234 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 94 [2022-11-26 00:12:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:49,236 INFO L225 Difference]: With dead ends: 1449 [2022-11-26 00:12:49,237 INFO L226 Difference]: Without dead ends: 894 [2022-11-26 00:12:49,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 225 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=258, Invalid=2934, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:12:49,238 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 112 mSDsluCounter, 4888 mSDsCounter, 0 mSdLazyCounter, 4151 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 5172 SdHoareTripleChecker+Invalid, 4180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:49,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 5172 Invalid, 4180 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [29 Valid, 4151 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2022-11-26 00:12:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-11-26 00:12:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 862. [2022-11-26 00:12:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 636 states have (on average 1.2437106918238994) internal successors, (791), 642 states have internal predecessors, (791), 143 states have call successors, (143), 82 states have call predecessors, (143), 82 states have return successors, (143), 137 states have call predecessors, (143), 143 states have call successors, (143) [2022-11-26 00:12:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1077 transitions. [2022-11-26 00:12:49,497 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1077 transitions. Word has length 94 [2022-11-26 00:12:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:49,497 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1077 transitions. [2022-11-26 00:12:49,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-26 00:12:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1077 transitions. [2022-11-26 00:12:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-26 00:12:49,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:49,500 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 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, 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, 1, 1] [2022-11-26 00:12:49,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:49,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-26 00:12:49,706 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:12:49,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:49,706 INFO L85 PathProgramCache]: Analyzing trace with hash 501826894, now seen corresponding path program 1 times [2022-11-26 00:12:49,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:49,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114643796] [2022-11-26 00:12:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:49,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:12:50,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:50,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114643796] [2022-11-26 00:12:50,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114643796] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:50,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594733790] [2022-11-26 00:12:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:50,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:50,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:50,036 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:50,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:12:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:50,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:12:50,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:12:50,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:12:50,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594733790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:50,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1795680978] [2022-11-26 00:12:50,496 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-11-26 00:12:50,497 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:50,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:50,497 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:50,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:54,819 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-26 00:12:54,842 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-26 00:12:54,861 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-11-26 00:12:54,942 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-11-26 00:12:55,446 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-26 00:12:55,493 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:13:48,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1795680978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:13:48,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:13:48,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [8, 9, 9] total 58 [2022-11-26 00:13:48,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146188482] [2022-11-26 00:13:48,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:13:48,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-26 00:13:48,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:48,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-26 00:13:48,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3024, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:13:48,135 INFO L87 Difference]: Start difference. First operand 862 states and 1077 transitions. Second operand has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-26 00:14:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:00,530 INFO L93 Difference]: Finished difference Result 1436 states and 1827 transitions. [2022-11-26 00:14:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-26 00:14:00,530 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 98 [2022-11-26 00:14:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:00,534 INFO L225 Difference]: With dead ends: 1436 [2022-11-26 00:14:00,534 INFO L226 Difference]: Without dead ends: 884 [2022-11-26 00:14:00,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 17 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 54.4s TimeCoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 00:14:00,537 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 201 mSDsluCounter, 4621 mSDsCounter, 0 mSdLazyCounter, 4021 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 4881 SdHoareTripleChecker+Invalid, 4089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 4021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:00,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 4881 Invalid, 4089 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [68 Valid, 4021 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-11-26 00:14:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-11-26 00:14:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 849. [2022-11-26 00:14:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 627 states have (on average 1.240829346092504) internal successors, (778), 633 states have internal predecessors, (778), 139 states have call successors, (139), 82 states have call predecessors, (139), 82 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) [2022-11-26 00:14:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1056 transitions. [2022-11-26 00:14:00,843 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1056 transitions. Word has length 98 [2022-11-26 00:14:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:00,843 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1056 transitions. [2022-11-26 00:14:00,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-26 00:14:00,844 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1056 transitions. [2022-11-26 00:14:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-26 00:14:00,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:00,846 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:00,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:14:01,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-26 00:14:01,052 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:01,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1809514280, now seen corresponding path program 1 times [2022-11-26 00:14:01,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:01,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156666466] [2022-11-26 00:14:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:01,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-26 00:14:01,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:01,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156666466] [2022-11-26 00:14:01,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156666466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:01,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:01,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:14:01,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287965731] [2022-11-26 00:14:01,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:01,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:14:01,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:14:01,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:14:01,265 INFO L87 Difference]: Start difference. First operand 849 states and 1056 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-26 00:14:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:01,615 INFO L93 Difference]: Finished difference Result 1402 states and 1774 transitions. [2022-11-26 00:14:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:14:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 108 [2022-11-26 00:14:01,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:01,619 INFO L225 Difference]: With dead ends: 1402 [2022-11-26 00:14:01,619 INFO L226 Difference]: Without dead ends: 837 [2022-11-26 00:14:01,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:14:01,621 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 7 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:01,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 562 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:14:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-11-26 00:14:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 787. [2022-11-26 00:14:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 585 states have (on average 1.2068376068376068) internal successors, (706), 591 states have internal predecessors, (706), 125 states have call successors, (125), 76 states have call predecessors, (125), 76 states have return successors, (125), 119 states have call predecessors, (125), 125 states have call successors, (125) [2022-11-26 00:14:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 956 transitions. [2022-11-26 00:14:01,839 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 956 transitions. Word has length 108 [2022-11-26 00:14:01,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:01,840 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 956 transitions. [2022-11-26 00:14:01,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-26 00:14:01,840 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 956 transitions. [2022-11-26 00:14:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-26 00:14:01,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:01,843 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:01,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-26 00:14:01,843 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:01,843 INFO L85 PathProgramCache]: Analyzing trace with hash -993728657, now seen corresponding path program 1 times [2022-11-26 00:14:01,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:01,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928054717] [2022-11-26 00:14:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:01,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-26 00:14:02,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:02,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928054717] [2022-11-26 00:14:02,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928054717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:02,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:02,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:14:02,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826190720] [2022-11-26 00:14:02,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:02,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:14:02,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:02,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:14:02,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:14:02,042 INFO L87 Difference]: Start difference. First operand 787 states and 956 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-26 00:14:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:02,325 INFO L93 Difference]: Finished difference Result 1245 states and 1545 transitions. [2022-11-26 00:14:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:14:02,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 124 [2022-11-26 00:14:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:02,328 INFO L225 Difference]: With dead ends: 1245 [2022-11-26 00:14:02,328 INFO L226 Difference]: Without dead ends: 775 [2022-11-26 00:14:02,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:14:02,329 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 6 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:02,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 553 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:14:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-11-26 00:14:02,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 751. [2022-11-26 00:14:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 559 states have (on average 1.184257602862254) internal successors, (662), 565 states have internal predecessors, (662), 118 states have call successors, (118), 73 states have call predecessors, (118), 73 states have return successors, (118), 112 states have call predecessors, (118), 118 states have call successors, (118) [2022-11-26 00:14:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 898 transitions. [2022-11-26 00:14:02,533 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 898 transitions. Word has length 124 [2022-11-26 00:14:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:02,533 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 898 transitions. [2022-11-26 00:14:02,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-26 00:14:02,534 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 898 transitions. [2022-11-26 00:14:02,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-26 00:14:02,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:02,537 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:02,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-26 00:14:02,537 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:02,538 INFO L85 PathProgramCache]: Analyzing trace with hash 711856186, now seen corresponding path program 1 times [2022-11-26 00:14:02,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:02,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092361887] [2022-11-26 00:14:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:02,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-26 00:14:02,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:02,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092361887] [2022-11-26 00:14:02,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092361887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:02,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487080527] [2022-11-26 00:14:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:02,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:02,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:02,922 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:02,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:14:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:03,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:14:03,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-26 00:14:03,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-26 00:14:03,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487080527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175274530] [2022-11-26 00:14:03,330 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-11-26 00:14:03,330 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:14:03,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:14:03,331 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:14:03,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:14:10,852 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 91 for LOIs [2022-11-26 00:14:10,987 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:14:11,017 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-26 00:14:11,162 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 151 for LOIs [2022-11-26 00:14:11,196 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 195 for LOIs [2022-11-26 00:14:11,621 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 194 for LOIs [2022-11-26 00:14:12,082 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:14,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69096#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2p_old~0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256)))) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:14,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:14,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:14,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-11-26 00:15:14,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487931161] [2022-11-26 00:15:14,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:14,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:15:14,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:14,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:15:14,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=3961, Unknown=0, NotChecked=0, Total=4290 [2022-11-26 00:15:14,115 INFO L87 Difference]: Start difference. First operand 751 states and 898 transitions. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-26 00:15:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:15,327 INFO L93 Difference]: Finished difference Result 1983 states and 2516 transitions. [2022-11-26 00:15:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:15:15,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) Word has length 134 [2022-11-26 00:15:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:15,335 INFO L225 Difference]: With dead ends: 1983 [2022-11-26 00:15:15,335 INFO L226 Difference]: Without dead ends: 1399 [2022-11-26 00:15:15,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 323 SyntacticMatches, 24 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 62.3s TimeCoverageRelationStatistics Valid=365, Invalid=4605, Unknown=0, NotChecked=0, Total=4970 [2022-11-26 00:15:15,337 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 459 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:15,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1929 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:15:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-11-26 00:15:15,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1054. [2022-11-26 00:15:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 781 states have (on average 1.17797695262484) internal successors, (920), 790 states have internal predecessors, (920), 166 states have call successors, (166), 106 states have call predecessors, (166), 106 states have return successors, (166), 157 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-26 00:15:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1252 transitions. [2022-11-26 00:15:15,609 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1252 transitions. Word has length 134 [2022-11-26 00:15:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:15,609 INFO L495 AbstractCegarLoop]: Abstraction has 1054 states and 1252 transitions. [2022-11-26 00:15:15,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-26 00:15:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1252 transitions. [2022-11-26 00:15:15,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-26 00:15:15,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:15,612 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:15,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:15,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:15,819 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:15,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:15,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1461184554, now seen corresponding path program 1 times [2022-11-26 00:15:15,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:15,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090325543] [2022-11-26 00:15:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:15,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-26 00:15:18,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:18,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090325543] [2022-11-26 00:15:18,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090325543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:18,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159546222] [2022-11-26 00:15:18,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:18,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:18,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:18,722 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:18,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:15:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:18,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:15:18,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-26 00:15:19,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-26 00:15:20,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159546222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:20,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439806311] [2022-11-26 00:15:20,598 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2022-11-26 00:15:20,598 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:20,598 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:20,599 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:20,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:29,359 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 92 for LOIs [2022-11-26 00:15:29,488 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-26 00:15:29,505 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-26 00:15:29,621 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 152 for LOIs [2022-11-26 00:15:29,655 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 123 for LOIs [2022-11-26 00:15:29,772 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 197 for LOIs [2022-11-26 00:15:30,230 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:16:51,194 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74011#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:16:51,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:16:51,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:16:51,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14, 14] total 55 [2022-11-26 00:16:51,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987935769] [2022-11-26 00:16:51,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:16:51,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-26 00:16:51,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:51,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-26 00:16:51,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=10192, Unknown=0, NotChecked=0, Total=12210 [2022-11-26 00:16:51,199 INFO L87 Difference]: Start difference. First operand 1054 states and 1252 transitions. Second operand has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-11-26 00:16:58,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:58,590 INFO L93 Difference]: Finished difference Result 2558 states and 3339 transitions. [2022-11-26 00:16:58,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-26 00:16:58,591 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) Word has length 142 [2022-11-26 00:16:58,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:58,598 INFO L225 Difference]: With dead ends: 2558 [2022-11-26 00:16:58,599 INFO L226 Difference]: Without dead ends: 1713 [2022-11-26 00:16:58,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 330 SyntacticMatches, 23 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6281 ImplicationChecksByTransitivity, 84.8s TimeCoverageRelationStatistics Valid=2492, Invalid=16414, Unknown=0, NotChecked=0, Total=18906 [2022-11-26 00:16:58,604 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 785 mSDsluCounter, 12440 mSDsCounter, 0 mSdLazyCounter, 5639 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 12864 SdHoareTripleChecker+Invalid, 5835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 5639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:58,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 12864 Invalid, 5835 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [196 Valid, 5639 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-26 00:16:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-11-26 00:16:58,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 981. [2022-11-26 00:16:58,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 732 states have (on average 1.1967213114754098) internal successors, (876), 743 states have internal predecessors, (876), 151 states have call successors, (151), 97 states have call predecessors, (151), 97 states have return successors, (151), 140 states have call predecessors, (151), 151 states have call successors, (151) [2022-11-26 00:16:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1178 transitions. [2022-11-26 00:16:58,901 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1178 transitions. Word has length 142 [2022-11-26 00:16:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:58,902 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1178 transitions. [2022-11-26 00:16:58,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-11-26 00:16:58,902 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1178 transitions. [2022-11-26 00:16:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:16:58,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:58,905 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2022-11-26 00:16:58,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:59,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-26 00:16:59,118 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:59,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1374833708, now seen corresponding path program 1 times [2022-11-26 00:16:59,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:59,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271636793] [2022-11-26 00:16:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:59,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-26 00:17:00,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271636793] [2022-11-26 00:17:00,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271636793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:17:00,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003771704] [2022-11-26 00:17:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:00,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:00,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:00,076 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:00,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_567af88a-0f32-434d-9cda-58a2aa980701/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:17:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:00,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-26 00:17:00,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 67 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 00:17:01,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-26 00:17:01,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003771704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:01,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [394160571] [2022-11-26 00:17:01,724 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-11-26 00:17:01,724 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:01,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:01,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:01,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:26,168 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 84 for LOIs [2022-11-26 00:17:26,231 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-11-26 00:17:26,237 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 116 for LOIs [2022-11-26 00:17:26,321 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 104 for LOIs [2022-11-26 00:17:26,409 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 119 for LOIs [2022-11-26 00:17:26,465 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 86 for LOIs [2022-11-26 00:17:26,484 INFO L180 IcfgInterpreter]: Interpretation finished