./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/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_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/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_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/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 a30aa210ed4a7c8ee647a70aef136aef282e5eccb07388ecda6495e33bc30b6d --- 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 [2022-11-25 22:19:11,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:19:11,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:19:11,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:19:11,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:19:11,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:19:11,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:19:11,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:19:11,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:19:11,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:19:11,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:19:11,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:19:11,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:19:11,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:19:11,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:19:11,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:19:11,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:19:11,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:19:11,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:19:11,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:19:11,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:19:11,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:19:11,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:19:11,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:19:11,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:19:11,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:19:11,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:19:11,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:19:11,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:19:11,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:19:11,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:19:11,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:19:11,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:19:11,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:19:11,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:19:11,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:19:11,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:19:11,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:19:11,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:19:11,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:19:11,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:19:11,932 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:19:11,956 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:19:11,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:19:11,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:19:11,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:19:11,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:19:11,957 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:19:11,958 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:19:11,958 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:19:11,958 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:19:11,958 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:19:11,958 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:19:11,959 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:19:11,959 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:19:11,959 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:19:11,959 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:19:11,959 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:19:11,960 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:19:11,960 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:19:11,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:19:11,961 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:19:11,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:19:11,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:19:11,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:19:11,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:19:11,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:19:11,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:19:11,962 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:19:11,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:19:11,963 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:19:11,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:19:11,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:19:11,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:19:11,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:19:11,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:19:11,964 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:19:11,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:19:11,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:19:11,965 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:19:11,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:19:11,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:19:11,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:19:11,965 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_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a30aa210ed4a7c8ee647a70aef136aef282e5eccb07388ecda6495e33bc30b6d [2022-11-25 22:19:12,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:19:12,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:19:12,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:19:12,328 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:19:12,328 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:19:12,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2022-11-25 22:19:15,364 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:19:15,572 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:19:15,573 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2022-11-25 22:19:15,583 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/data/e015ed729/987577f3f1b54a99ba5a1e8b6ca71611/FLAGdd770883b [2022-11-25 22:19:15,598 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/data/e015ed729/987577f3f1b54a99ba5a1e8b6ca71611 [2022-11-25 22:19:15,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:19:15,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:19:15,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:19:15,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:19:15,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:19:15,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:19:15" (1/1) ... [2022-11-25 22:19:15,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4468d036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:15, skipping insertion in model container [2022-11-25 22:19:15,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:19:15" (1/1) ... [2022-11-25 22:19:15,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:19:15,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:19:16,035 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_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c[14540,14553] [2022-11-25 22:19:16,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:19:16,062 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:19:16,176 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_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c[14540,14553] [2022-11-25 22:19:16,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:19:16,198 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:19:16,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:16 WrapperNode [2022-11-25 22:19:16,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:19:16,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:19:16,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:19:16,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:19:16,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:16" (1/1) ... [2022-11-25 22:19:16,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:16" (1/1) ... [2022-11-25 22:19:16,286 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 477 [2022-11-25 22:19:16,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:19:16,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:19:16,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:19:16,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:19:16,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:16" (1/1) ... [2022-11-25 22:19:16,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:16" (1/1) ... [2022-11-25 22:19:16,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:16" (1/1) ... [2022-11-25 22:19:16,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:16" (1/1) ... [2022-11-25 22:19:16,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:16" (1/1) ... [2022-11-25 22:19:16,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:16" (1/1) ... [2022-11-25 22:19:16,325 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:16" (1/1) ... [2022-11-25 22:19:16,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:16" (1/1) ... [2022-11-25 22:19:16,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:19:16,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:19:16,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:19:16,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:19:16,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:16" (1/1) ... [2022-11-25 22:19:16,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:19:16,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:19:16,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:19:16,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:19:16,432 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-11-25 22:19:16,432 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-11-25 22:19:16,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:19:16,433 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-11-25 22:19:16,433 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-11-25 22:19:16,433 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-11-25 22:19:16,433 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-11-25 22:19:16,433 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2022-11-25 22:19:16,434 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2022-11-25 22:19:16,434 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 22:19:16,434 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 22:19:16,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:19:16,434 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-11-25 22:19:16,434 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-11-25 22:19:16,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:19:16,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:19:16,435 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-11-25 22:19:16,435 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-11-25 22:19:16,588 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:19:16,596 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:19:17,275 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:19:17,495 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:19:17,496 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 22:19:17,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:19:17 BoogieIcfgContainer [2022-11-25 22:19:17,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:19:17,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:19:17,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:19:17,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:19:17,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:19:15" (1/3) ... [2022-11-25 22:19:17,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ff085f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:19:17, skipping insertion in model container [2022-11-25 22:19:17,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:19:16" (2/3) ... [2022-11-25 22:19:17,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ff085f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:19:17, skipping insertion in model container [2022-11-25 22:19:17,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:19:17" (3/3) ... [2022-11-25 22:19:17,519 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_1.ufo.BOUNDED-10.pals.c [2022-11-25 22:19:17,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:19:17,540 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:19:17,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:19:17,614 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;@aa911a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:19:17,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:19:17,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 105 states have internal predecessors, (159), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-25 22:19:17,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 22:19:17,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:17,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:19:17,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:17,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:17,641 INFO L85 PathProgramCache]: Analyzing trace with hash 331613024, now seen corresponding path program 1 times [2022-11-25 22:19:17,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:17,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78578511] [2022-11-25 22:19:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:19:18,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:18,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78578511] [2022-11-25 22:19:18,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78578511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:19:18,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:19:18,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:19:18,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939078467] [2022-11-25 22:19:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:19:18,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:19:18,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:18,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:19:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:19:18,380 INFO L87 Difference]: Start difference. First operand has 144 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 105 states have internal predecessors, (159), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) 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) [2022-11-25 22:19:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:18,563 INFO L93 Difference]: Finished difference Result 289 states and 469 transitions. [2022-11-25 22:19:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:19:18,565 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 [2022-11-25 22:19:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:18,577 INFO L225 Difference]: With dead ends: 289 [2022-11-25 22:19:18,577 INFO L226 Difference]: Without dead ends: 147 [2022-11-25 22:19:18,585 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 [2022-11-25 22:19:18,587 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 5 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:18,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 611 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:19:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-25 22:19:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-25 22:19:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 107 states have (on average 1.4953271028037383) internal successors, (160), 107 states have internal predecessors, (160), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-25 22:19:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 222 transitions. [2022-11-25 22:19:18,657 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 222 transitions. Word has length 19 [2022-11-25 22:19:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:18,657 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 222 transitions. [2022-11-25 22:19:18,658 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) [2022-11-25 22:19:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 222 transitions. [2022-11-25 22:19:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 22:19:18,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:18,660 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] [2022-11-25 22:19:18,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:19:18,663 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:18,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:18,664 INFO L85 PathProgramCache]: Analyzing trace with hash 455532572, now seen corresponding path program 1 times [2022-11-25 22:19:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:18,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161695514] [2022-11-25 22:19:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:18,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:19:19,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:19,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161695514] [2022-11-25 22:19:19,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161695514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:19:19,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:19:19,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:19:19,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661463942] [2022-11-25 22:19:19,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:19:19,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:19:19,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:19,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:19:19,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:19:19,027 INFO L87 Difference]: Start difference. First operand 147 states and 222 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2022-11-25 22:19:19,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:19,122 INFO L93 Difference]: Finished difference Result 296 states and 447 transitions. [2022-11-25 22:19:19,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:19:19,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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 28 [2022-11-25 22:19:19,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:19,125 INFO L225 Difference]: With dead ends: 296 [2022-11-25 22:19:19,125 INFO L226 Difference]: Without dead ends: 152 [2022-11-25 22:19:19,126 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 [2022-11-25 22:19:19,127 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 6 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:19,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 623 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:19:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-25 22:19:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-25 22:19:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 111 states have (on average 1.4774774774774775) internal successors, (164), 111 states have internal predecessors, (164), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-25 22:19:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 226 transitions. [2022-11-25 22:19:19,142 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 226 transitions. Word has length 28 [2022-11-25 22:19:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:19,142 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 226 transitions. [2022-11-25 22:19:19,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 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) [2022-11-25 22:19:19,143 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 226 transitions. [2022-11-25 22:19:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 22:19:19,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:19,144 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] [2022-11-25 22:19:19,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:19:19,145 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:19,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1914468921, now seen corresponding path program 1 times [2022-11-25 22:19:19,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:19,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002207004] [2022-11-25 22:19:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:19,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:19:19,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:19,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002207004] [2022-11-25 22:19:19,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002207004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:19:19,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:19:19,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:19:19,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296913562] [2022-11-25 22:19:19,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:19:19,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:19:19,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:19,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:19:19,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:19:19,387 INFO L87 Difference]: Start difference. First operand 152 states and 226 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-11-25 22:19:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:19,490 INFO L93 Difference]: Finished difference Result 306 states and 458 transitions. [2022-11-25 22:19:19,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:19:19,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 36 [2022-11-25 22:19:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:19,495 INFO L225 Difference]: With dead ends: 306 [2022-11-25 22:19:19,495 INFO L226 Difference]: Without dead ends: 157 [2022-11-25 22:19:19,500 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 [2022-11-25 22:19:19,504 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 6 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:19,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 609 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:19:19,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-25 22:19:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-11-25 22:19:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 115 states have (on average 1.4608695652173913) internal successors, (168), 115 states have internal predecessors, (168), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-25 22:19:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 230 transitions. [2022-11-25 22:19:19,518 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 230 transitions. Word has length 36 [2022-11-25 22:19:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:19,518 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 230 transitions. [2022-11-25 22:19:19,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-11-25 22:19:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 230 transitions. [2022-11-25 22:19:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 22:19:19,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:19,531 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] [2022-11-25 22:19:19,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:19:19,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:19,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:19,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1995142899, now seen corresponding path program 1 times [2022-11-25 22:19:19,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:19,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853291393] [2022-11-25 22:19:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:19,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:19:19,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:19,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853291393] [2022-11-25 22:19:19,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853291393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:19:19,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:19:19,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:19:19,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403527345] [2022-11-25 22:19:19,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:19:19,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:19:19,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:19,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:19:19,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:19:19,804 INFO L87 Difference]: Start difference. First operand 157 states and 230 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-11-25 22:19:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:19,869 INFO L93 Difference]: Finished difference Result 316 states and 466 transitions. [2022-11-25 22:19:19,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:19:19,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 44 [2022-11-25 22:19:19,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:19,871 INFO L225 Difference]: With dead ends: 316 [2022-11-25 22:19:19,871 INFO L226 Difference]: Without dead ends: 162 [2022-11-25 22:19:19,872 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 [2022-11-25 22:19:19,873 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 6 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:19,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 609 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:19:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-25 22:19:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-11-25 22:19:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 119 states have (on average 1.4453781512605042) internal successors, (172), 119 states have internal predecessors, (172), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-25 22:19:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 234 transitions. [2022-11-25 22:19:19,887 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 234 transitions. Word has length 44 [2022-11-25 22:19:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:19,887 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 234 transitions. [2022-11-25 22:19:19,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-11-25 22:19:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 234 transitions. [2022-11-25 22:19:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 22:19:19,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:19,889 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] [2022-11-25 22:19:19,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:19:19,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:19,890 INFO L85 PathProgramCache]: Analyzing trace with hash -401316404, now seen corresponding path program 1 times [2022-11-25 22:19:19,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:19,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762316897] [2022-11-25 22:19:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:19,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:19:20,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:20,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762316897] [2022-11-25 22:19:20,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762316897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:19:20,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:19:20,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:19:20,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106863232] [2022-11-25 22:19:20,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:19:20,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:19:20,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:20,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:19:20,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:19:20,035 INFO L87 Difference]: Start difference. First operand 162 states and 234 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-11-25 22:19:20,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:20,092 INFO L93 Difference]: Finished difference Result 325 states and 470 transitions. [2022-11-25 22:19:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:19:20,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 44 [2022-11-25 22:19:20,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:20,094 INFO L225 Difference]: With dead ends: 325 [2022-11-25 22:19:20,095 INFO L226 Difference]: Without dead ends: 166 [2022-11-25 22:19:20,095 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 [2022-11-25 22:19:20,096 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 5 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 618 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 [2022-11-25 22:19:20,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 618 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:19:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-25 22:19:20,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-11-25 22:19:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 122 states have (on average 1.4344262295081966) internal successors, (175), 122 states have internal predecessors, (175), 31 states have call successors, (31), 12 states have call predecessors, (31), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-25 22:19:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 237 transitions. [2022-11-25 22:19:20,108 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 237 transitions. Word has length 44 [2022-11-25 22:19:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:20,109 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 237 transitions. [2022-11-25 22:19:20,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-11-25 22:19:20,110 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 237 transitions. [2022-11-25 22:19:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 22:19:20,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:20,111 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] [2022-11-25 22:19:20,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:19:20,111 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:20,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1513077261, now seen corresponding path program 1 times [2022-11-25 22:19:20,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:20,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944268796] [2022-11-25 22:19:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:20,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 22:19:20,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:20,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944268796] [2022-11-25 22:19:20,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944268796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:19:20,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:19:20,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:19:20,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555467767] [2022-11-25 22:19:20,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:19:20,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:19:20,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:20,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:19:20,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:19:20,313 INFO L87 Difference]: Start difference. First operand 166 states and 237 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-11-25 22:19:20,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:20,394 INFO L93 Difference]: Finished difference Result 335 states and 479 transitions. [2022-11-25 22:19:20,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:19:20,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 52 [2022-11-25 22:19:20,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:20,396 INFO L225 Difference]: With dead ends: 335 [2022-11-25 22:19:20,397 INFO L226 Difference]: Without dead ends: 172 [2022-11-25 22:19:20,397 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 [2022-11-25 22:19:20,400 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 7 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:20,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 620 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:19:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-25 22:19:20,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-25 22:19:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 127 states have (on average 1.4173228346456692) internal successors, (180), 127 states have internal predecessors, (180), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-25 22:19:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 242 transitions. [2022-11-25 22:19:20,423 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 242 transitions. Word has length 52 [2022-11-25 22:19:20,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:20,423 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 242 transitions. [2022-11-25 22:19:20,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-11-25 22:19:20,424 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 242 transitions. [2022-11-25 22:19:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 22:19:20,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:20,426 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] [2022-11-25 22:19:20,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 22:19:20,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:20,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:20,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2060811264, now seen corresponding path program 1 times [2022-11-25 22:19:20,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:20,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313692045] [2022-11-25 22:19:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:20,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:19:21,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:21,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313692045] [2022-11-25 22:19:21,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313692045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:19:21,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55298541] [2022-11-25 22:19:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:21,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:21,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:19:21,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:19:21,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:19:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:21,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 22:19:21,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:19:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:19:21,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:19:21,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55298541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:19:21,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:19:21,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-25 22:19:21,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601089658] [2022-11-25 22:19:21,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:19:21,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:19:21,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:21,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:19:21,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:19:21,473 INFO L87 Difference]: Start difference. First operand 172 states and 242 transitions. Second operand has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 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) [2022-11-25 22:19:21,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:21,869 INFO L93 Difference]: Finished difference Result 510 states and 710 transitions. [2022-11-25 22:19:21,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 22:19:21,870 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 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 55 [2022-11-25 22:19:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:21,876 INFO L225 Difference]: With dead ends: 510 [2022-11-25 22:19:21,876 INFO L226 Difference]: Without dead ends: 331 [2022-11-25 22:19:21,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:19:21,878 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 198 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:21,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1267 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:19:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-25 22:19:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 327. [2022-11-25 22:19:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 240 states have (on average 1.4083333333333334) internal successors, (338), 241 states have internal predecessors, (338), 60 states have call successors, (60), 26 states have call predecessors, (60), 26 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2022-11-25 22:19:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 458 transitions. [2022-11-25 22:19:21,910 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 458 transitions. Word has length 55 [2022-11-25 22:19:21,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:21,911 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 458 transitions. [2022-11-25 22:19:21,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 8 states have internal predecessors, (40), 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) [2022-11-25 22:19:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 458 transitions. [2022-11-25 22:19:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 22:19:21,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:21,915 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] [2022-11-25 22:19:21,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:19:22,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 22:19:22,122 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:22,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:22,122 INFO L85 PathProgramCache]: Analyzing trace with hash -133773083, now seen corresponding path program 1 times [2022-11-25 22:19:22,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:22,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111105857] [2022-11-25 22:19:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:22,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:19:22,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:22,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111105857] [2022-11-25 22:19:22,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111105857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:19:22,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611330930] [2022-11-25 22:19:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:22,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:22,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:19:22,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:19:22,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:19:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:22,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:19:22,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:19:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:19:23,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:19:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:19:23,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611330930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:19:23,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [961576521] [2022-11-25 22:19:23,437 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-25 22:19:23,437 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:19:23,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:19:23,448 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:19:23,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:19:26,583 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-25 22:19:26,624 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-25 22:19:26,657 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 94 for LOIs [2022-11-25 22:19:26,701 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:19:39,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [961576521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:19:39,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:19:39,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [9, 9, 9] total 35 [2022-11-25 22:19:39,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032831226] [2022-11-25 22:19:39,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:19:39,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 22:19:39,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:39,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 22:19:39,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 22:19:39,057 INFO L87 Difference]: Start difference. First operand 327 states and 458 transitions. Second operand has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-25 22:19:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:19:47,241 INFO L93 Difference]: Finished difference Result 740 states and 1044 transitions. [2022-11-25 22:19:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 22:19:47,242 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2022-11-25 22:19:47,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:19:47,246 INFO L225 Difference]: With dead ends: 740 [2022-11-25 22:19:47,246 INFO L226 Difference]: Without dead ends: 416 [2022-11-25 22:19:47,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 141 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 22:19:47,248 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 181 mSDsluCounter, 2666 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 2942 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:19:47,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 2942 Invalid, 1690 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [66 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-25 22:19:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-25 22:19:47,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 393. [2022-11-25 22:19:47,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 287 states have (on average 1.386759581881533) internal successors, (398), 288 states have internal predecessors, (398), 75 states have call successors, (75), 30 states have call predecessors, (75), 30 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-11-25 22:19:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 548 transitions. [2022-11-25 22:19:47,312 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 548 transitions. Word has length 57 [2022-11-25 22:19:47,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:19:47,312 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 548 transitions. [2022-11-25 22:19:47,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-25 22:19:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 548 transitions. [2022-11-25 22:19:47,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 22:19:47,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:19:47,315 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] [2022-11-25 22:19:47,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:19:47,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:47,520 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:19:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:19:47,521 INFO L85 PathProgramCache]: Analyzing trace with hash 827590853, now seen corresponding path program 1 times [2022-11-25 22:19:47,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:19:47,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227655464] [2022-11-25 22:19:47,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:47,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:19:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:19:47,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:19:47,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227655464] [2022-11-25 22:19:47,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227655464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:19:47,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490966957] [2022-11-25 22:19:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:47,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:47,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:19:47,997 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:19:48,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:19:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:48,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:19:48,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:19:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:19:48,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:19:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:19:48,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490966957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:19:48,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [660205182] [2022-11-25 22:19:48,594 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-11-25 22:19:48,594 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:19:48,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:19:48,595 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:19:48,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:19:51,374 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-25 22:19:51,410 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-25 22:19:51,439 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-25 22:19:51,515 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:20:06,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [660205182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:20:06,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:20:06,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [9, 9, 9] total 34 [2022-11-25 22:20:06,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117676599] [2022-11-25 22:20:06,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:20:06,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 22:20:06,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:06,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 22:20:06,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 22:20:06,560 INFO L87 Difference]: Start difference. First operand 393 states and 548 transitions. Second operand has 23 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 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) [2022-11-25 22:20:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:11,300 INFO L93 Difference]: Finished difference Result 813 states and 1151 transitions. [2022-11-25 22:20:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 22:20:11,301 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 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 57 [2022-11-25 22:20:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:11,304 INFO L225 Difference]: With dead ends: 813 [2022-11-25 22:20:11,305 INFO L226 Difference]: Without dead ends: 489 [2022-11-25 22:20:11,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 22:20:11,307 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 139 mSDsluCounter, 2130 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 2422 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:11,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 2422 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-25 22:20:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-11-25 22:20:11,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 457. [2022-11-25 22:20:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 333 states have (on average 1.3723723723723724) internal successors, (457), 334 states have internal predecessors, (457), 90 states have call successors, (90), 33 states have call predecessors, (90), 33 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-25 22:20:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 637 transitions. [2022-11-25 22:20:11,409 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 637 transitions. Word has length 57 [2022-11-25 22:20:11,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:11,409 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 637 transitions. [2022-11-25 22:20:11,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 16 states have internal predecessors, (38), 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) [2022-11-25 22:20:11,410 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 637 transitions. [2022-11-25 22:20:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-25 22:20:11,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:11,412 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] [2022-11-25 22:20:11,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 22:20:11,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:11,617 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:11,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:11,618 INFO L85 PathProgramCache]: Analyzing trace with hash 152385642, now seen corresponding path program 1 times [2022-11-25 22:20:11,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:11,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579928891] [2022-11-25 22:20:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:11,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:20:12,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:12,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579928891] [2022-11-25 22:20:12,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579928891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:12,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938754203] [2022-11-25 22:20:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:12,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:12,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:12,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:12,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:20:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:12,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:20:12,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:20:12,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:20:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 22:20:12,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938754203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:20:12,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256121863] [2022-11-25 22:20:12,597 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-25 22:20:12,597 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:20:12,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:20:12,597 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:20:12,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:20:14,555 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-25 22:20:14,592 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-25 22:20:14,624 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 93 for LOIs [2022-11-25 22:20:14,668 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:20:28,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1256121863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:20:28,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:20:28,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [9, 9, 9] total 37 [2022-11-25 22:20:28,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191938636] [2022-11-25 22:20:28,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:20:28,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 22:20:28,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:28,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 22:20:28,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 22:20:28,809 INFO L87 Difference]: Start difference. First operand 457 states and 637 transitions. Second operand has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-25 22:20:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:37,991 INFO L93 Difference]: Finished difference Result 866 states and 1221 transitions. [2022-11-25 22:20:37,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 22:20:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-11-25 22:20:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:37,999 INFO L225 Difference]: With dead ends: 866 [2022-11-25 22:20:37,999 INFO L226 Difference]: Without dead ends: 542 [2022-11-25 22:20:38,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 145 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 22:20:38,001 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 129 mSDsluCounter, 3036 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 3344 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:38,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 3344 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-25 22:20:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-25 22:20:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 493. [2022-11-25 22:20:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 359 states have (on average 1.3565459610027855) internal successors, (487), 360 states have internal predecessors, (487), 97 states have call successors, (97), 36 states have call predecessors, (97), 36 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-25 22:20:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 681 transitions. [2022-11-25 22:20:38,099 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 681 transitions. Word has length 59 [2022-11-25 22:20:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:38,099 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 681 transitions. [2022-11-25 22:20:38,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 18 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-25 22:20:38,100 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 681 transitions. [2022-11-25 22:20:38,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 22:20:38,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:38,101 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] [2022-11-25 22:20:38,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:20:38,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:20:38,308 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:38,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1305511079, now seen corresponding path program 1 times [2022-11-25 22:20:38,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:38,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217707434] [2022-11-25 22:20:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:38,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:20:38,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:38,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217707434] [2022-11-25 22:20:38,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217707434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:20:38,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:20:38,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:20:38,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137651063] [2022-11-25 22:20:38,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:20:38,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:20:38,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:20:38,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:20:38,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:20:38,445 INFO L87 Difference]: Start difference. First operand 493 states and 681 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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) [2022-11-25 22:20:38,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:38,585 INFO L93 Difference]: Finished difference Result 893 states and 1255 transitions. [2022-11-25 22:20:38,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:20:38,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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 61 [2022-11-25 22:20:38,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:38,590 INFO L225 Difference]: With dead ends: 893 [2022-11-25 22:20:38,590 INFO L226 Difference]: Without dead ends: 501 [2022-11-25 22:20:38,591 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 [2022-11-25 22:20:38,592 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 5 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 618 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 [2022-11-25 22:20:38,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 618 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:20:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-25 22:20:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2022-11-25 22:20:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 365 states have (on average 1.3506849315068492) internal successors, (493), 366 states have internal predecessors, (493), 97 states have call successors, (97), 38 states have call predecessors, (97), 38 states have return successors, (97), 96 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-25 22:20:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 687 transitions. [2022-11-25 22:20:38,702 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 687 transitions. Word has length 61 [2022-11-25 22:20:38,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:38,702 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 687 transitions. [2022-11-25 22:20:38,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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) [2022-11-25 22:20:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 687 transitions. [2022-11-25 22:20:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 22:20:38,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:38,705 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] [2022-11-25 22:20:38,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 22:20:38,706 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:38,706 INFO L85 PathProgramCache]: Analyzing trace with hash 219036085, now seen corresponding path program 1 times [2022-11-25 22:20:38,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:38,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749236735] [2022-11-25 22:20:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:38,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:20:39,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:39,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749236735] [2022-11-25 22:20:39,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749236735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:39,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881022941] [2022-11-25 22:20:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:39,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:39,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:39,155 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:39,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:20:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:39,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:20:39,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:20:39,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:20:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:20:39,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881022941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:20:39,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [581157611] [2022-11-25 22:20:39,710 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2022-11-25 22:20:39,710 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:20:39,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:20:39,710 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:20:39,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:20:43,361 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 231 for LOIs [2022-11-25 22:20:43,571 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-25 22:20:43,589 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 192 for LOIs [2022-11-25 22:20:43,728 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 154 for LOIs [2022-11-25 22:20:43,778 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-25 22:20:43,825 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-25 22:20:43,885 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:21:26,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13533#(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) (<= ~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|) (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) (= ~side2_written~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)))) (<= ~manual_selection_History_2~0 0) (= ~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 [2022-11-25 22:21:26,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:21:26,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:21:26,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-25 22:21:26,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093614797] [2022-11-25 22:21:26,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:21:26,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 22:21:26,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:21:26,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 22:21:26,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2503, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 22:21:26,841 INFO L87 Difference]: Start difference. First operand 501 states and 687 transitions. Second operand has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 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) [2022-11-25 22:21:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:21:27,556 INFO L93 Difference]: Finished difference Result 1221 states and 1699 transitions. [2022-11-25 22:21:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 22:21:27,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 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 65 [2022-11-25 22:21:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:21:27,561 INFO L225 Difference]: With dead ends: 1221 [2022-11-25 22:21:27,562 INFO L226 Difference]: Without dead ends: 837 [2022-11-25 22:21:27,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 12 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=277, Invalid=3029, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 22:21:27,564 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 296 mSDsluCounter, 3063 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:21:27,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 3396 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:21:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-11-25 22:21:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 529. [2022-11-25 22:21:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 386 states have (on average 1.3160621761658031) internal successors, (508), 389 states have internal predecessors, (508), 95 states have call successors, (95), 47 states have call predecessors, (95), 47 states have return successors, (95), 92 states have call predecessors, (95), 95 states have call successors, (95) [2022-11-25 22:21:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 698 transitions. [2022-11-25 22:21:27,677 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 698 transitions. Word has length 65 [2022-11-25 22:21:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:21:27,678 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 698 transitions. [2022-11-25 22:21:27,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 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) [2022-11-25 22:21:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 698 transitions. [2022-11-25 22:21:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-25 22:21:27,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:21:27,686 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] [2022-11-25 22:21:27,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:21:27,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 22:21:27,892 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:21:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:21:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1688305221, now seen corresponding path program 1 times [2022-11-25 22:21:27,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:21:27,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206565159] [2022-11-25 22:21:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:21:27,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:21:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:21:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:21:28,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:21:28,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206565159] [2022-11-25 22:21:28,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206565159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:21:28,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:21:28,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:21:28,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150666168] [2022-11-25 22:21:28,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:21:28,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:21:28,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:21:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:21:28,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:21:28,226 INFO L87 Difference]: Start difference. First operand 529 states and 698 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 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) [2022-11-25 22:21:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:21:29,030 INFO L93 Difference]: Finished difference Result 1167 states and 1611 transitions. [2022-11-25 22:21:29,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:21:29,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 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 66 [2022-11-25 22:21:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:21:29,036 INFO L225 Difference]: With dead ends: 1167 [2022-11-25 22:21:29,036 INFO L226 Difference]: Without dead ends: 861 [2022-11-25 22:21:29,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:21:29,041 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 527 mSDsluCounter, 1413 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:21:29,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1810 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:21:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-11-25 22:21:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 657. [2022-11-25 22:21:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 477 states have (on average 1.3123689727463312) internal successors, (626), 480 states have internal predecessors, (626), 119 states have call successors, (119), 60 states have call predecessors, (119), 60 states have return successors, (119), 116 states have call predecessors, (119), 119 states have call successors, (119) [2022-11-25 22:21:29,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 864 transitions. [2022-11-25 22:21:29,178 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 864 transitions. Word has length 66 [2022-11-25 22:21:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:21:29,178 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 864 transitions. [2022-11-25 22:21:29,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 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) [2022-11-25 22:21:29,179 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 864 transitions. [2022-11-25 22:21:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 22:21:29,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:21:29,180 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] [2022-11-25 22:21:29,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 22:21:29,181 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:21:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:21:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1045684058, now seen corresponding path program 1 times [2022-11-25 22:21:29,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:21:29,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539388506] [2022-11-25 22:21:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:21:29,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:21:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:21:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:21:29,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:21:29,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539388506] [2022-11-25 22:21:29,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539388506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:21:29,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:21:29,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 22:21:29,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720240625] [2022-11-25 22:21:29,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:21:29,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:21:29,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:21:29,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:21:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 22:21:29,465 INFO L87 Difference]: Start difference. First operand 657 states and 864 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 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) [2022-11-25 22:21:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:21:30,335 INFO L93 Difference]: Finished difference Result 1524 states and 2101 transitions. [2022-11-25 22:21:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 22:21:30,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 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 68 [2022-11-25 22:21:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:21:30,342 INFO L225 Difference]: With dead ends: 1524 [2022-11-25 22:21:30,342 INFO L226 Difference]: Without dead ends: 1194 [2022-11-25 22:21:30,344 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 [2022-11-25 22:21:30,344 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 578 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 2174 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:21:30,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 2174 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:21:30,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-11-25 22:21:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 919. [2022-11-25 22:21:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 664 states have (on average 1.3207831325301205) internal successors, (877), 669 states have internal predecessors, (877), 169 states have call successors, (169), 85 states have call predecessors, (169), 85 states have return successors, (169), 164 states have call predecessors, (169), 169 states have call successors, (169) [2022-11-25 22:21:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1215 transitions. [2022-11-25 22:21:30,533 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1215 transitions. Word has length 68 [2022-11-25 22:21:30,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:21:30,533 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1215 transitions. [2022-11-25 22:21:30,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 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) [2022-11-25 22:21:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1215 transitions. [2022-11-25 22:21:30,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:21:30,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:21:30,535 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] [2022-11-25 22:21:30,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 22:21:30,536 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:21:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:21:30,536 INFO L85 PathProgramCache]: Analyzing trace with hash 508139515, now seen corresponding path program 1 times [2022-11-25 22:21:30,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:21:30,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791824649] [2022-11-25 22:21:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:21:30,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:21:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:21:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 22:21:30,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:21:30,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791824649] [2022-11-25 22:21:30,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791824649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:21:30,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834383091] [2022-11-25 22:21:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:21:30,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:21:30,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:21:30,919 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:21:30,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:21:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:21:31,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:21:31,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:21:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:21:31,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:21:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 22:21:31,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834383091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:21:31,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925505287] [2022-11-25 22:21:31,311 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2022-11-25 22:21:31,311 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:21:31,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:21:31,312 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:21:31,312 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:21:35,689 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-25 22:21:35,732 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-25 22:21:35,762 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-25 22:21:35,879 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-25 22:21:35,956 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:22:03,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1925505287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:22:03,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:22:03,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [8, 9, 9] total 45 [2022-11-25 22:22:03,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216892999] [2022-11-25 22:22:03,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:22:03,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 22:22:03,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:03,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 22:22:03,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1801, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 22:22:03,439 INFO L87 Difference]: Start difference. First operand 919 states and 1215 transitions. Second operand has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 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) [2022-11-25 22:22:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:10,785 INFO L93 Difference]: Finished difference Result 1488 states and 1984 transitions. [2022-11-25 22:22:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 22:22:10,791 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 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 72 [2022-11-25 22:22:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:10,796 INFO L225 Difference]: With dead ends: 1488 [2022-11-25 22:22:10,796 INFO L226 Difference]: Without dead ends: 905 [2022-11-25 22:22:10,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 170 SyntacticMatches, 12 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2022-11-25 22:22:10,801 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 68 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 2718 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:10,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 2718 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-25 22:22:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-11-25 22:22:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 905. [2022-11-25 22:22:10,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 654 states have (on average 1.319571865443425) internal successors, (863), 659 states have internal predecessors, (863), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-25 22:22:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1195 transitions. [2022-11-25 22:22:10,991 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1195 transitions. Word has length 72 [2022-11-25 22:22:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:10,992 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1195 transitions. [2022-11-25 22:22:10,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 23 states have internal predecessors, (43), 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) [2022-11-25 22:22:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1195 transitions. [2022-11-25 22:22:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 22:22:10,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:10,994 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] [2022-11-25 22:22:11,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:22:11,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 22:22:11,199 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:22:11,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:11,200 INFO L85 PathProgramCache]: Analyzing trace with hash -963077093, now seen corresponding path program 1 times [2022-11-25 22:22:11,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:11,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865373809] [2022-11-25 22:22:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:11,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 22:22:11,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:11,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865373809] [2022-11-25 22:22:11,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865373809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:22:11,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463060927] [2022-11-25 22:22:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:11,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:11,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:11,551 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:11,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:22:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:11,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 22:22:11,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:22:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:22:11,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:22:11,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463060927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:22:11,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:22:11,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-25 22:22:11,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473069180] [2022-11-25 22:22:11,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:22:11,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:22:11,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:11,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:22:11,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:22:11,821 INFO L87 Difference]: Start difference. First operand 905 states and 1195 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 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) [2022-11-25 22:22:12,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:12,464 INFO L93 Difference]: Finished difference Result 1770 states and 2402 transitions. [2022-11-25 22:22:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:22:12,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 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 72 [2022-11-25 22:22:12,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:12,470 INFO L225 Difference]: With dead ends: 1770 [2022-11-25 22:22:12,470 INFO L226 Difference]: Without dead ends: 1070 [2022-11-25 22:22:12,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:22:12,473 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 493 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:12,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1510 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:22:12,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-11-25 22:22:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 905. [2022-11-25 22:22:12,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 654 states have (on average 1.3134556574923548) internal successors, (859), 659 states have internal predecessors, (859), 166 states have call successors, (166), 84 states have call predecessors, (166), 84 states have return successors, (166), 161 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-25 22:22:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1191 transitions. [2022-11-25 22:22:12,671 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1191 transitions. Word has length 72 [2022-11-25 22:22:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:12,672 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1191 transitions. [2022-11-25 22:22:12,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 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) [2022-11-25 22:22:12,672 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1191 transitions. [2022-11-25 22:22:12,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-25 22:22:12,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:12,674 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] [2022-11-25 22:22:12,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:22:12,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:12,884 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:22:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash 192208881, now seen corresponding path program 1 times [2022-11-25 22:22:12,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:12,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720361936] [2022-11-25 22:22:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:12,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 22:22:13,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:13,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720361936] [2022-11-25 22:22:13,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720361936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:22:13,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:22:13,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:22:13,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887961061] [2022-11-25 22:22:13,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:22:13,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:22:13,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:13,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:22:13,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:22:13,102 INFO L87 Difference]: Start difference. First operand 905 states and 1191 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2022-11-25 22:22:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:13,385 INFO L93 Difference]: Finished difference Result 1194 states and 1643 transitions. [2022-11-25 22:22:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:22:13,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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 75 [2022-11-25 22:22:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:13,391 INFO L225 Difference]: With dead ends: 1194 [2022-11-25 22:22:13,392 INFO L226 Difference]: Without dead ends: 1192 [2022-11-25 22:22:13,393 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 [2022-11-25 22:22:13,393 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 153 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:13,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1489 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:22:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2022-11-25 22:22:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 913. [2022-11-25 22:22:13,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 658 states have (on average 1.3115501519756838) internal successors, (863), 665 states have internal predecessors, (863), 168 states have call successors, (168), 86 states have call predecessors, (168), 86 states have return successors, (168), 161 states have call predecessors, (168), 168 states have call successors, (168) [2022-11-25 22:22:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1199 transitions. [2022-11-25 22:22:13,597 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1199 transitions. Word has length 75 [2022-11-25 22:22:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:13,597 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1199 transitions. [2022-11-25 22:22:13,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 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) [2022-11-25 22:22:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1199 transitions. [2022-11-25 22:22:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-25 22:22:13,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:13,600 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] [2022-11-25 22:22:13,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 22:22:13,600 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:22:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:13,601 INFO L85 PathProgramCache]: Analyzing trace with hash 94923755, now seen corresponding path program 1 times [2022-11-25 22:22:13,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:13,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47961488] [2022-11-25 22:22:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:13,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 22:22:13,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:13,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47961488] [2022-11-25 22:22:13,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47961488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:22:13,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:22:13,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:22:13,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191055157] [2022-11-25 22:22:13,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:22:13,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:22:13,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:13,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:22:13,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:22:13,820 INFO L87 Difference]: Start difference. First operand 913 states and 1199 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 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) [2022-11-25 22:22:14,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:14,033 INFO L93 Difference]: Finished difference Result 1579 states and 2085 transitions. [2022-11-25 22:22:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:22:14,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 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 78 [2022-11-25 22:22:14,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:14,038 INFO L225 Difference]: With dead ends: 1579 [2022-11-25 22:22:14,039 INFO L226 Difference]: Without dead ends: 901 [2022-11-25 22:22:14,040 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 [2022-11-25 22:22:14,042 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:14,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 610 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:22:14,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-11-25 22:22:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 901. [2022-11-25 22:22:14,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 652 states have (on average 1.2868098159509203) internal successors, (839), 659 states have internal predecessors, (839), 162 states have call successors, (162), 86 states have call predecessors, (162), 86 states have return successors, (162), 155 states have call predecessors, (162), 162 states have call successors, (162) [2022-11-25 22:22:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1163 transitions. [2022-11-25 22:22:14,220 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1163 transitions. Word has length 78 [2022-11-25 22:22:14,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:14,221 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1163 transitions. [2022-11-25 22:22:14,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 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) [2022-11-25 22:22:14,221 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1163 transitions. [2022-11-25 22:22:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 22:22:14,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:14,223 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] [2022-11-25 22:22:14,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 22:22:14,223 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:22:14,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:14,223 INFO L85 PathProgramCache]: Analyzing trace with hash -662976287, now seen corresponding path program 1 times [2022-11-25 22:22:14,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:14,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398000225] [2022-11-25 22:22:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:14,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:22:14,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:14,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398000225] [2022-11-25 22:22:14,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398000225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:22:14,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295603400] [2022-11-25 22:22:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:14,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:14,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:14,679 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:14,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:22:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:14,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:22:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:22:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 22:22:15,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:22:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 22:22:15,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295603400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:22:15,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533347298] [2022-11-25 22:22:15,323 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-25 22:22:15,323 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:22:15,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:22:15,323 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:22:15,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:22:18,790 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 217 for LOIs [2022-11-25 22:22:18,972 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-25 22:22:18,989 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 121 for LOIs [2022-11-25 22:22:19,102 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 105 for LOIs [2022-11-25 22:22:19,125 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 101 for LOIs [2022-11-25 22:22:19,155 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 94 for LOIs [2022-11-25 22:22:19,179 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:22:56,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35484#(and (<= ~active_side_History_0~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= 0 ~side2_written~0) (= ~s1s1~0 0) (<= 0 (+ ~s1s2_new~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (not (= (mod ~side1Failed_History_0~0 256) 0)) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= (+ ~s2s1_new~0 1) 0) (<= 0 ~manual_selection_History_2~0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (<= (+ ~nomsg~0 1) 0) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ 2 ~active_side_History_1~0) 0) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= ~manual_selection_History_2~0 0) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:22:56,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:22:56,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:22:56,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-11-25 22:22:56,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082622319] [2022-11-25 22:22:56,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:22:56,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 22:22:56,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:22:56,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 22:22:56,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 22:22:56,394 INFO L87 Difference]: Start difference. First operand 901 states and 1163 transitions. Second operand has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 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) [2022-11-25 22:22:57,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:22:57,114 INFO L93 Difference]: Finished difference Result 1916 states and 2549 transitions. [2022-11-25 22:22:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 22:22:57,115 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 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 80 [2022-11-25 22:22:57,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:22:57,123 INFO L225 Difference]: With dead ends: 1916 [2022-11-25 22:22:57,123 INFO L226 Difference]: Without dead ends: 1175 [2022-11-25 22:22:57,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 180 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=363, Invalid=3797, Unknown=0, NotChecked=0, Total=4160 [2022-11-25 22:22:57,127 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 237 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:22:57,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 2361 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:22:57,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2022-11-25 22:22:57,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 880. [2022-11-25 22:22:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 637 states have (on average 1.2794348508634223) internal successors, (815), 644 states have internal predecessors, (815), 156 states have call successors, (156), 86 states have call predecessors, (156), 86 states have return successors, (156), 149 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-25 22:22:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1127 transitions. [2022-11-25 22:22:57,319 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1127 transitions. Word has length 80 [2022-11-25 22:22:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:22:57,319 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1127 transitions. [2022-11-25 22:22:57,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 7.777777777777778) internal successors, (70), 12 states have internal predecessors, (70), 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) [2022-11-25 22:22:57,320 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1127 transitions. [2022-11-25 22:22:57,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 22:22:57,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:22:57,321 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] [2022-11-25 22:22:57,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:22:57,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:57,532 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:22:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:22:57,532 INFO L85 PathProgramCache]: Analyzing trace with hash -394555029, now seen corresponding path program 1 times [2022-11-25 22:22:57,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:22:57,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760791109] [2022-11-25 22:22:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:57,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:22:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 22:22:57,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:22:57,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760791109] [2022-11-25 22:22:57,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760791109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:22:57,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186232218] [2022-11-25 22:22:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:22:57,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:22:57,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:22:57,877 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:22:57,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:22:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:22:58,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:22:58,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:22:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:22:58,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:22:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 22:22:58,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186232218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:22:58,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [328004024] [2022-11-25 22:22:58,306 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2022-11-25 22:22:58,307 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:22:58,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:22:58,307 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:22:58,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:23:00,466 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-25 22:23:00,491 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-11-25 22:23:00,511 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 94 for LOIs [2022-11-25 22:23:00,607 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 100 for LOIs [2022-11-25 22:23:00,648 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 94 for LOIs [2022-11-25 22:23:00,675 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:23:28,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [328004024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:23:28,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:23:28,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-11-25 22:23:28,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630197070] [2022-11-25 22:23:28,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:23:28,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 22:23:28,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:28,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 22:23:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2497, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 22:23:28,053 INFO L87 Difference]: Start difference. First operand 880 states and 1127 transitions. Second operand has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-25 22:23:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:23:54,857 INFO L93 Difference]: Finished difference Result 1489 states and 1937 transitions. [2022-11-25 22:23:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 22:23:54,857 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 80 [2022-11-25 22:23:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:23:54,862 INFO L225 Difference]: With dead ends: 1489 [2022-11-25 22:23:54,862 INFO L226 Difference]: Without dead ends: 915 [2022-11-25 22:23:54,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 46.1s TimeCoverageRelationStatistics Valid=458, Invalid=3964, Unknown=0, NotChecked=0, Total=4422 [2022-11-25 22:23:54,865 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 319 mSDsluCounter, 3971 mSDsCounter, 0 mSdLazyCounter, 3316 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 4234 SdHoareTripleChecker+Invalid, 3463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 3316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:23:54,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 4234 Invalid, 3463 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [147 Valid, 3316 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-25 22:23:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-11-25 22:23:55,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 883. [2022-11-25 22:23:55,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 639 states have (on average 1.2785602503912363) internal successors, (817), 646 states have internal predecessors, (817), 157 states have call successors, (157), 86 states have call predecessors, (157), 86 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-11-25 22:23:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1131 transitions. [2022-11-25 22:23:55,075 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1131 transitions. Word has length 80 [2022-11-25 22:23:55,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:23:55,076 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1131 transitions. [2022-11-25 22:23:55,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 28 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-25 22:23:55,076 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1131 transitions. [2022-11-25 22:23:55,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 22:23:55,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:23:55,078 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] [2022-11-25 22:23:55,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:23:55,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:55,284 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:23:55,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:23:55,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1646880730, now seen corresponding path program 1 times [2022-11-25 22:23:55,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:23:55,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507867815] [2022-11-25 22:23:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:55,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:23:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 22:23:55,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:23:55,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507867815] [2022-11-25 22:23:55,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507867815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:23:55,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943525736] [2022-11-25 22:23:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:23:55,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:23:55,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:23:55,639 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:23:55,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:23:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:23:55,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:23:55,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:23:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:23:55,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:23:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 22:23:56,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943525736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:23:56,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [204959159] [2022-11-25 22:23:56,039 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-25 22:23:56,039 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:23:56,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:23:56,040 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:23:56,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:23:59,755 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-25 22:23:59,782 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-25 22:23:59,799 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-25 22:23:59,904 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-11-25 22:23:59,950 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-25 22:23:59,995 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:24:39,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [204959159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:24:39,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:24:39,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-11-25 22:24:39,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372120279] [2022-11-25 22:24:39,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:24:39,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 22:24:39,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:39,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 22:24:39,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2513, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 22:24:39,656 INFO L87 Difference]: Start difference. First operand 883 states and 1131 transitions. Second operand has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 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) [2022-11-25 22:24:50,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:50,897 INFO L93 Difference]: Finished difference Result 1492 states and 1941 transitions. [2022-11-25 22:24:50,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 22:24:50,898 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 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 82 [2022-11-25 22:24:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:50,900 INFO L225 Difference]: With dead ends: 1492 [2022-11-25 22:24:50,901 INFO L226 Difference]: Without dead ends: 918 [2022-11-25 22:24:50,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 193 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=251, Invalid=2611, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 22:24:50,903 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 87 mSDsluCounter, 4831 mSDsCounter, 0 mSdLazyCounter, 3754 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 5129 SdHoareTripleChecker+Invalid, 3775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:50,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 5129 Invalid, 3775 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [21 Valid, 3754 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-25 22:24:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-11-25 22:24:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 886. [2022-11-25 22:24:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 641 states have (on average 1.2776911076443058) internal successors, (819), 648 states have internal predecessors, (819), 158 states have call successors, (158), 86 states have call predecessors, (158), 86 states have return successors, (158), 151 states have call predecessors, (158), 158 states have call successors, (158) [2022-11-25 22:24:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1135 transitions. [2022-11-25 22:24:51,104 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1135 transitions. Word has length 82 [2022-11-25 22:24:51,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:51,104 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1135 transitions. [2022-11-25 22:24:51,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 29 states have internal predecessors, (47), 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) [2022-11-25 22:24:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1135 transitions. [2022-11-25 22:24:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 22:24:51,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:51,107 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] [2022-11-25 22:24:51,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 22:24:51,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 22:24:51,313 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:51,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:51,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1993333853, now seen corresponding path program 1 times [2022-11-25 22:24:51,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:51,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316121643] [2022-11-25 22:24:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:51,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-25 22:24:51,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:51,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316121643] [2022-11-25 22:24:51,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316121643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:24:51,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:24:51,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:24:51,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68559945] [2022-11-25 22:24:51,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:24:51,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:24:51,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:24:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:24:51,491 INFO L87 Difference]: Start difference. First operand 886 states and 1135 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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) [2022-11-25 22:24:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:51,764 INFO L93 Difference]: Finished difference Result 1513 states and 1955 transitions. [2022-11-25 22:24:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:24:51,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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 87 [2022-11-25 22:24:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:51,769 INFO L225 Difference]: With dead ends: 1513 [2022-11-25 22:24:51,770 INFO L226 Difference]: Without dead ends: 874 [2022-11-25 22:24:51,772 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 [2022-11-25 22:24:51,774 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 7 mSDsluCounter, 390 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 [2022-11-25 22:24:51,774 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] [2022-11-25 22:24:51,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-11-25 22:24:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 874. [2022-11-25 22:24:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 635 states have (on average 1.2519685039370079) internal successors, (795), 642 states have internal predecessors, (795), 152 states have call successors, (152), 86 states have call predecessors, (152), 86 states have return successors, (152), 145 states have call predecessors, (152), 152 states have call successors, (152) [2022-11-25 22:24:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1099 transitions. [2022-11-25 22:24:52,020 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1099 transitions. Word has length 87 [2022-11-25 22:24:52,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:52,021 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1099 transitions. [2022-11-25 22:24:52,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 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) [2022-11-25 22:24:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1099 transitions. [2022-11-25 22:24:52,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 22:24:52,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:52,023 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] [2022-11-25 22:24:52,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-25 22:24:52,023 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:52,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:52,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1959131448, now seen corresponding path program 1 times [2022-11-25 22:24:52,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:52,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006542578] [2022-11-25 22:24:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:52,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 22:24:52,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:52,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006542578] [2022-11-25 22:24:52,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006542578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:52,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40706368] [2022-11-25 22:24:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:52,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:52,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:52,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:52,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:24:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:24:52,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:24:52,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 22:24:52,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40706368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:52,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992316562] [2022-11-25 22:24:52,789 INFO L159 IcfgInterpreter]: Started Sifa with 64 locations of interest [2022-11-25 22:24:52,789 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:52,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:52,790 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:52,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:56,285 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-11-25 22:24:56,313 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-25 22:24:56,331 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-11-25 22:24:56,430 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 202 for LOIs [2022-11-25 22:24:56,826 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-11-25 22:24:56,876 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:42,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [992316562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:25:42,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:25:42,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [8, 9, 9] total 54 [2022-11-25 22:25:42,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881059246] [2022-11-25 22:25:42,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:25:42,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 22:25:42,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:42,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 22:25:42,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2588, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 22:25:42,778 INFO L87 Difference]: Start difference. First operand 874 states and 1099 transitions. Second operand has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 29 states have internal predecessors, (48), 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) [2022-11-25 22:25:54,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:54,993 INFO L93 Difference]: Finished difference Result 1462 states and 1864 transitions. [2022-11-25 22:25:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 22:25:54,993 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 29 states have internal predecessors, (48), 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 87 [2022-11-25 22:25:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:54,997 INFO L225 Difference]: With dead ends: 1462 [2022-11-25 22:25:54,997 INFO L226 Difference]: Without dead ends: 896 [2022-11-25 22:25:54,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 208 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=282, Invalid=2688, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 22:25:55,000 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 193 mSDsluCounter, 4747 mSDsCounter, 0 mSdLazyCounter, 3996 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 5010 SdHoareTripleChecker+Invalid, 4068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 3996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:55,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 5010 Invalid, 4068 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [72 Valid, 3996 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-11-25 22:25:55,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-11-25 22:25:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 861. [2022-11-25 22:25:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 626 states have (on average 1.2492012779552715) internal successors, (782), 633 states have internal predecessors, (782), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-25 22:25:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1078 transitions. [2022-11-25 22:25:55,203 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1078 transitions. Word has length 87 [2022-11-25 22:25:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:55,203 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1078 transitions. [2022-11-25 22:25:55,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 1.263157894736842) internal successors, (48), 29 states have internal predecessors, (48), 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) [2022-11-25 22:25:55,204 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1078 transitions. [2022-11-25 22:25:55,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-25 22:25:55,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:55,205 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] [2022-11-25 22:25:55,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:25:55,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 22:25:55,412 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:55,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:55,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1376257965, now seen corresponding path program 1 times [2022-11-25 22:25:55,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:55,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277343169] [2022-11-25 22:25:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:55,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:55,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 22:25:55,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:55,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277343169] [2022-11-25 22:25:55,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277343169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:25:55,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694781440] [2022-11-25 22:25:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:55,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:55,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:55,754 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:55,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:25:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:55,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:25:55,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:25:56,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:25:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 22:25:56,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694781440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:25:56,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [905667545] [2022-11-25 22:25:56,221 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-11-25 22:25:56,221 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:25:56,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:25:56,221 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:25:56,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:25:59,413 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-25 22:25:59,436 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-25 22:25:59,456 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 198 for LOIs [2022-11-25 22:25:59,859 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-11-25 22:26:00,237 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-11-25 22:26:00,281 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:45,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [905667545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:26:45,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:45,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [8, 9, 9] total 54 [2022-11-25 22:26:45,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936452746] [2022-11-25 22:26:45,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:26:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 22:26:45,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 22:26:45,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2618, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 22:26:45,815 INFO L87 Difference]: Start difference. First operand 861 states and 1078 transitions. Second operand has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 30 states have internal predecessors, (50), 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) [2022-11-25 22:26:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:26:57,308 INFO L93 Difference]: Finished difference Result 1462 states and 1864 transitions. [2022-11-25 22:26:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 22:26:57,309 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 30 states have internal predecessors, (50), 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 89 [2022-11-25 22:26:57,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:26:57,313 INFO L225 Difference]: With dead ends: 1462 [2022-11-25 22:26:57,313 INFO L226 Difference]: Without dead ends: 893 [2022-11-25 22:26:57,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 215 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=252, Invalid=2718, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 22:26:57,316 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 263 mSDsluCounter, 4726 mSDsCounter, 0 mSdLazyCounter, 3872 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 5006 SdHoareTripleChecker+Invalid, 3956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:26:57,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 5006 Invalid, 3956 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [84 Valid, 3872 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-11-25 22:26:57,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-25 22:26:57,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 861. [2022-11-25 22:26:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 626 states have (on average 1.2476038338658146) internal successors, (781), 633 states have internal predecessors, (781), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 141 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-25 22:26:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1077 transitions. [2022-11-25 22:26:57,548 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1077 transitions. Word has length 89 [2022-11-25 22:26:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:26:57,549 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1077 transitions. [2022-11-25 22:26:57,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 30 states have internal predecessors, (50), 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) [2022-11-25 22:26:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1077 transitions. [2022-11-25 22:26:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 22:26:57,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:26:57,551 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] [2022-11-25 22:26:57,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 22:26:57,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 22:26:57,758 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:26:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:26:57,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2118828422, now seen corresponding path program 1 times [2022-11-25 22:26:57,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:26:57,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019471922] [2022-11-25 22:26:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:57,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:26:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 22:26:58,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019471922] [2022-11-25 22:26:58,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019471922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965755519] [2022-11-25 22:26:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:26:58,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:58,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:58,105 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:58,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 22:26:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:58,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:26:58,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:26:58,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 22:26:58,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965755519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:58,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [114392403] [2022-11-25 22:26:58,517 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2022-11-25 22:26:58,517 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:58,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:58,517 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:58,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:27:01,375 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-11-25 22:27:01,401 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-25 22:27:01,422 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 93 for LOIs [2022-11-25 22:27:01,523 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 135 for LOIs [2022-11-25 22:27:01,819 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 93 for LOIs [2022-11-25 22:27:01,844 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:27:39,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [114392403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:39,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:27:39,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [8, 9, 9] total 59 [2022-11-25 22:27:39,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568779778] [2022-11-25 22:27:39,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:39,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 22:27:39,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 22:27:39,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=3106, Unknown=0, NotChecked=0, Total=3422 [2022-11-25 22:27:39,972 INFO L87 Difference]: Start difference. First operand 861 states and 1077 transitions. Second operand has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 33 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-25 22:28:13,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:13,210 INFO L93 Difference]: Finished difference Result 1449 states and 1842 transitions. [2022-11-25 22:28:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 22:28:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 33 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 93 [2022-11-25 22:28:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:13,215 INFO L225 Difference]: With dead ends: 1449 [2022-11-25 22:28:13,215 INFO L226 Difference]: Without dead ends: 883 [2022-11-25 22:28:13,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 217 SyntacticMatches, 14 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 61.5s TimeCoverageRelationStatistics Valid=568, Invalid=4982, Unknown=0, NotChecked=0, Total=5550 [2022-11-25 22:28:13,218 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 224 mSDsluCounter, 4631 mSDsCounter, 0 mSdLazyCounter, 3690 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 4916 SdHoareTripleChecker+Invalid, 3825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 3690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:13,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 4916 Invalid, 3825 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [135 Valid, 3690 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-11-25 22:28:13,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-25 22:28:13,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 848. [2022-11-25 22:28:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 617 states have (on average 1.2447325769854134) internal successors, (768), 624 states have internal predecessors, (768), 144 states have call successors, (144), 86 states have call predecessors, (144), 86 states have return successors, (144), 137 states have call predecessors, (144), 144 states have call successors, (144) [2022-11-25 22:28:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1056 transitions. [2022-11-25 22:28:13,453 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1056 transitions. Word has length 93 [2022-11-25 22:28:13,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:13,453 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 1056 transitions. [2022-11-25 22:28:13,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 33 states have internal predecessors, (54), 10 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-25 22:28:13,454 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1056 transitions. [2022-11-25 22:28:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-25 22:28:13,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:13,456 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] [2022-11-25 22:28:13,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-25 22:28:13,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 22:28:13,662 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:13,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:13,662 INFO L85 PathProgramCache]: Analyzing trace with hash 980190837, now seen corresponding path program 1 times [2022-11-25 22:28:13,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:13,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979641294] [2022-11-25 22:28:13,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:13,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-25 22:28:13,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:13,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979641294] [2022-11-25 22:28:13,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979641294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:13,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:13,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:28:13,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328325973] [2022-11-25 22:28:13,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:13,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:28:13,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:13,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:28:13,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:28:13,842 INFO L87 Difference]: Start difference. First operand 848 states and 1056 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, (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) [2022-11-25 22:28:14,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:14,097 INFO L93 Difference]: Finished difference Result 1415 states and 1789 transitions. [2022-11-25 22:28:14,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:28:14,097 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, (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 103 [2022-11-25 22:28:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:14,102 INFO L225 Difference]: With dead ends: 1415 [2022-11-25 22:28:14,102 INFO L226 Difference]: Without dead ends: 836 [2022-11-25 22:28:14,104 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 [2022-11-25 22:28:14,104 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 7 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 580 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 [2022-11-25 22:28:14,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 580 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:28:14,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-11-25 22:28:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 786. [2022-11-25 22:28:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 575 states have (on average 1.2104347826086956) internal successors, (696), 582 states have internal predecessors, (696), 130 states have call successors, (130), 80 states have call predecessors, (130), 80 states have return successors, (130), 123 states have call predecessors, (130), 130 states have call successors, (130) [2022-11-25 22:28:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 956 transitions. [2022-11-25 22:28:14,285 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 956 transitions. Word has length 103 [2022-11-25 22:28:14,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:14,286 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 956 transitions. [2022-11-25 22:28:14,286 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, (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) [2022-11-25 22:28:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 956 transitions. [2022-11-25 22:28:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-25 22:28:14,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:14,288 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] [2022-11-25 22:28:14,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-25 22:28:14,289 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:14,289 INFO L85 PathProgramCache]: Analyzing trace with hash 652194887, now seen corresponding path program 1 times [2022-11-25 22:28:14,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:14,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713139013] [2022-11-25 22:28:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:14,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-25 22:28:14,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:14,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713139013] [2022-11-25 22:28:14,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713139013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:14,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:14,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:28:14,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784002356] [2022-11-25 22:28:14,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:14,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:28:14,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:14,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:28:14,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:28:14,461 INFO L87 Difference]: Start difference. First operand 786 states and 956 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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) [2022-11-25 22:28:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:14,733 INFO L93 Difference]: Finished difference Result 1258 states and 1560 transitions. [2022-11-25 22:28:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:28:14,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 119 [2022-11-25 22:28:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:14,737 INFO L225 Difference]: With dead ends: 1258 [2022-11-25 22:28:14,738 INFO L226 Difference]: Without dead ends: 774 [2022-11-25 22:28:14,739 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 [2022-11-25 22:28:14,740 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 6 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:14,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 571 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:28:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-25 22:28:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 758. [2022-11-25 22:28:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 555 states have (on average 1.1891891891891893) internal successors, (660), 562 states have internal predecessors, (660), 124 states have call successors, (124), 78 states have call predecessors, (124), 78 states have return successors, (124), 117 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-25 22:28:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 908 transitions. [2022-11-25 22:28:14,912 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 908 transitions. Word has length 119 [2022-11-25 22:28:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:14,912 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 908 transitions. [2022-11-25 22:28:14,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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) [2022-11-25 22:28:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 908 transitions. [2022-11-25 22:28:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-25 22:28:14,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:14,915 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] [2022-11-25 22:28:14,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-25 22:28:14,915 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:28:14,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:14,916 INFO L85 PathProgramCache]: Analyzing trace with hash 377183108, now seen corresponding path program 1 times [2022-11-25 22:28:14,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:14,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071174811] [2022-11-25 22:28:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:14,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-25 22:28:15,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:15,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071174811] [2022-11-25 22:28:15,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071174811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:15,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396301074] [2022-11-25 22:28:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:15,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:15,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:15,315 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:15,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 22:28:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:15,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 22:28:15,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-25 22:28:15,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-25 22:28:15,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396301074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:15,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211464797] [2022-11-25 22:28:15,767 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2022-11-25 22:28:15,767 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:15,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:15,768 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:15,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:24,091 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 91 for LOIs [2022-11-25 22:28:24,204 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-25 22:28:24,221 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-11-25 22:28:24,350 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 151 for LOIs [2022-11-25 22:28:24,387 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 195 for LOIs [2022-11-25 22:28:24,832 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 184 for LOIs [2022-11-25 22:28:25,293 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:29:25,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66980#(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) (= ~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 [2022-11-25 22:29:25,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:29:25,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:29:25,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-11-25 22:29:25,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185977823] [2022-11-25 22:29:25,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:29:25,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 22:29:25,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:25,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 22:29:25,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=3709, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 22:29:25,345 INFO L87 Difference]: Start difference. First operand 758 states and 908 transitions. Second operand has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 10 states have internal predecessors, (103), 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) [2022-11-25 22:29:26,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:26,424 INFO L93 Difference]: Finished difference Result 2063 states and 2618 transitions. [2022-11-25 22:29:26,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 22:29:26,425 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 10 states have internal predecessors, (103), 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 129 [2022-11-25 22:29:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:26,431 INFO L225 Difference]: With dead ends: 2063 [2022-11-25 22:29:26,431 INFO L226 Difference]: Without dead ends: 1457 [2022-11-25 22:29:26,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 313 SyntacticMatches, 21 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 60.4s TimeCoverageRelationStatistics Valid=359, Invalid=4333, Unknown=0, NotChecked=0, Total=4692 [2022-11-25 22:29:26,435 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 653 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:26,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 1969 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:29:26,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2022-11-25 22:29:26,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1061. [2022-11-25 22:29:26,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 777 states have (on average 1.1814671814671815) internal successors, (918), 787 states have internal predecessors, (918), 172 states have call successors, (172), 111 states have call predecessors, (172), 111 states have return successors, (172), 162 states have call predecessors, (172), 172 states have call successors, (172) [2022-11-25 22:29:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1262 transitions. [2022-11-25 22:29:26,677 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1262 transitions. Word has length 129 [2022-11-25 22:29:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:26,677 INFO L495 AbstractCegarLoop]: Abstraction has 1061 states and 1262 transitions. [2022-11-25 22:29:26,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 10 states have internal predecessors, (103), 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) [2022-11-25 22:29:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1262 transitions. [2022-11-25 22:29:26,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 22:29:26,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:26,680 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] [2022-11-25 22:29:26,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 22:29:26,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:26,880 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:29:26,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:26,881 INFO L85 PathProgramCache]: Analyzing trace with hash -766349292, now seen corresponding path program 1 times [2022-11-25 22:29:26,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:26,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442771936] [2022-11-25 22:29:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:26,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-25 22:29:29,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:29,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442771936] [2022-11-25 22:29:29,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442771936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:29:29,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241805848] [2022-11-25 22:29:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:29,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:29,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:29:29,716 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:29:29,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 22:29:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:29,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 22:29:29,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:29:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-25 22:29:30,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:29:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-25 22:29:31,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241805848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:29:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2039294090] [2022-11-25 22:29:31,563 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2022-11-25 22:29:31,563 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:29:31,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:29:31,563 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:29:31,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:29:37,056 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 89 for LOIs [2022-11-25 22:29:37,171 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-25 22:29:37,188 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 120 for LOIs [2022-11-25 22:29:37,350 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 99 for LOIs [2022-11-25 22:29:37,368 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 121 for LOIs [2022-11-25 22:29:37,505 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 130 for LOIs [2022-11-25 22:29:37,819 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:30:35,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '72015#(and (<= ~active_side_History_0~0 0) (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (<= 0 (+ ~s2s2_new~0 1)) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~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) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= 0 ~side2_written~0) (= ~s1s1~0 0) (<= 0 (+ ~s1s2_new~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= (+ ~s2s1_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~manual_selection_History_2~0 0) (<= (+ ~nomsg~0 1) 0) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ 2 ~active_side_History_1~0) 0) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (<= 0 |#StackHeapBarrier|) (<= (+ ~s2p_new~0 1) 0) (= ~s2p~0 0) (<= (+ ~s2s2_new~0 1) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-11-25 22:30:35,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:30:35,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:30:35,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14, 14] total 55 [2022-11-25 22:30:35,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030257253] [2022-11-25 22:30:35,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:30:35,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-25 22:30:35,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:30:35,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-25 22:30:35,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1989, Invalid=10001, Unknown=0, NotChecked=0, Total=11990 [2022-11-25 22:30:35,804 INFO L87 Difference]: Start difference. First operand 1061 states and 1262 transitions. Second operand has 55 states, 43 states have (on average 3.953488372093023) internal successors, (170), 44 states have internal predecessors, (170), 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) [2022-11-25 22:30:43,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:30:43,245 INFO L93 Difference]: Finished difference Result 2756 states and 3613 transitions. [2022-11-25 22:30:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 22:30:43,245 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 43 states have (on average 3.953488372093023) internal successors, (170), 44 states have internal predecessors, (170), 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 137 [2022-11-25 22:30:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:30:43,254 INFO L225 Difference]: With dead ends: 2756 [2022-11-25 22:30:43,254 INFO L226 Difference]: Without dead ends: 1889 [2022-11-25 22:30:43,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 321 SyntacticMatches, 18 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 61.8s TimeCoverageRelationStatistics Valid=2461, Invalid=16171, Unknown=0, NotChecked=0, Total=18632 [2022-11-25 22:30:43,259 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 1226 mSDsluCounter, 12361 mSDsCounter, 0 mSdLazyCounter, 5588 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 12818 SdHoareTripleChecker+Invalid, 5936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 5588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:30:43,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1282 Valid, 12818 Invalid, 5936 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [348 Valid, 5588 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-25 22:30:43,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2022-11-25 22:30:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1003. [2022-11-25 22:30:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 737 states have (on average 1.2048846675712348) internal successors, (888), 749 states have internal predecessors, (888), 160 states have call successors, (160), 105 states have call predecessors, (160), 105 states have return successors, (160), 148 states have call predecessors, (160), 160 states have call successors, (160) [2022-11-25 22:30:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1208 transitions. [2022-11-25 22:30:43,467 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1208 transitions. Word has length 137 [2022-11-25 22:30:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:30:43,467 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1208 transitions. [2022-11-25 22:30:43,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 43 states have (on average 3.953488372093023) internal successors, (170), 44 states have internal predecessors, (170), 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) [2022-11-25 22:30:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1208 transitions. [2022-11-25 22:30:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 22:30:43,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:30:43,469 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, 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] [2022-11-25 22:30:43,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 22:30:43,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 22:30:43,670 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:30:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:30:43,670 INFO L85 PathProgramCache]: Analyzing trace with hash 605221213, now seen corresponding path program 1 times [2022-11-25 22:30:43,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:30:43,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780518364] [2022-11-25 22:30:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:43,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:30:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-25 22:30:44,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:44,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780518364] [2022-11-25 22:30:44,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780518364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:30:44,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894215579] [2022-11-25 22:30:44,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:30:44,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:30:44,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:30:44,480 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:30:44,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 22:30:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:44,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 22:30:44,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:30:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 64 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 22:30:45,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:30:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-25 22:30:45,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894215579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:30:45,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501786208] [2022-11-25 22:30:45,865 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2022-11-25 22:30:45,865 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:30:45,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:30:45,866 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:30:45,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:31:02,140 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 207 for LOIs [2022-11-25 22:31:02,504 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-11-25 22:31:02,523 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 96 for LOIs [2022-11-25 22:31:02,613 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 156 for LOIs [2022-11-25 22:31:02,660 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-11-25 22:31:02,710 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 95 for LOIs [2022-11-25 22:31:02,737 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:31:59,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [501786208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:31:59,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:31:59,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [9, 10, 9] total 72 [2022-11-25 22:31:59,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273764229] [2022-11-25 22:31:59,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:31:59,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-25 22:31:59,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:59,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-25 22:31:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=4395, Unknown=0, NotChecked=0, Total=5112 [2022-11-25 22:31:59,045 INFO L87 Difference]: Start difference. First operand 1003 states and 1208 transitions. Second operand has 50 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 34 states have internal predecessors, (58), 12 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-25 22:32:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:32:28,455 INFO L93 Difference]: Finished difference Result 1947 states and 2391 transitions. [2022-11-25 22:32:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 22:32:28,456 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 34 states have internal predecessors, (58), 12 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 137 [2022-11-25 22:32:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:32:28,461 INFO L225 Difference]: With dead ends: 1947 [2022-11-25 22:32:28,461 INFO L226 Difference]: Without dead ends: 1211 [2022-11-25 22:32:28,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 328 SyntacticMatches, 21 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3393 ImplicationChecksByTransitivity, 76.8s TimeCoverageRelationStatistics Valid=1020, Invalid=6120, Unknown=0, NotChecked=0, Total=7140 [2022-11-25 22:32:28,465 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 72 mSDsluCounter, 2994 mSDsCounter, 0 mSdLazyCounter, 3216 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 3178 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:32:28,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 3178 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3216 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-11-25 22:32:28,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-11-25 22:32:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1161. [2022-11-25 22:32:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 851 states have (on average 1.198589894242068) internal successors, (1020), 864 states have internal predecessors, (1020), 191 states have call successors, (191), 118 states have call predecessors, (191), 118 states have return successors, (191), 178 states have call predecessors, (191), 191 states have call successors, (191) [2022-11-25 22:32:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1402 transitions. [2022-11-25 22:32:28,760 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1402 transitions. Word has length 137 [2022-11-25 22:32:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:32:28,761 INFO L495 AbstractCegarLoop]: Abstraction has 1161 states and 1402 transitions. [2022-11-25 22:32:28,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 34 states have internal predecessors, (58), 12 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-25 22:32:28,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1402 transitions. [2022-11-25 22:32:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 22:32:28,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:32:28,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:32:28,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 22:32:28,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:32:28,963 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:32:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:32:28,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1566585149, now seen corresponding path program 1 times [2022-11-25 22:32:28,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:32:28,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395611284] [2022-11-25 22:32:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:28,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:32:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-25 22:32:29,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:32:29,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395611284] [2022-11-25 22:32:29,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395611284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:32:29,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569086783] [2022-11-25 22:32:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:29,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:32:29,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:32:29,717 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:32:29,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7cb0ea-bfce-485a-aeb3-bad74d6fdb95/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 22:32:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:29,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 22:32:29,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:32:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 65 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 22:32:30,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:32:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-25 22:32:31,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569086783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:32:31,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2021117103] [2022-11-25 22:32:31,120 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-11-25 22:32:31,120 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:32:31,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:32:31,121 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:32:31,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs