./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh --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 5c6d968f3bfd626cfd1fff51fa64657ab37ae457da61332877d0ea5ab7fc90f2 --- 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-2329fc7 [2022-12-14 05:13:04,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:13:04,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:13:04,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:13:04,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:13:04,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:13:04,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:13:04,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:13:04,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:13:04,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:13:04,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:13:04,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:13:04,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:13:04,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:13:04,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:13:04,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:13:04,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:13:04,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:13:04,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:13:04,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:13:04,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:13:04,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:13:04,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:13:04,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:13:04,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:13:04,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:13:04,138 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:13:04,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:13:04,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:13:04,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:13:04,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:13:04,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:13:04,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:13:04,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:13:04,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:13:04,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:13:04,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:13:04,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:13:04,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:13:04,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:13:04,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:13:04,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:13:04,166 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:13:04,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:13:04,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:13:04,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:13:04,167 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:13:04,167 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:13:04,167 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:13:04,168 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:13:04,174 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:13:04,174 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:13:04,175 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:13:04,175 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:13:04,175 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:13:04,175 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:13:04,175 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:13:04,176 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:13:04,176 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:13:04,176 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:13:04,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:13:04,177 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:13:04,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:13:04,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:13:04,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:13:04,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:13:04,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:13:04,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:13:04,178 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:13:04,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:13:04,179 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:13:04,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:13:04,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:13:04,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:13:04,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:13:04,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:13:04,180 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:13:04,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:13:04,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:13:04,180 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:13:04,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:13:04,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:13:04,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:13:04,181 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_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c6d968f3bfd626cfd1fff51fa64657ab37ae457da61332877d0ea5ab7fc90f2 [2022-12-14 05:13:04,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:13:04,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:13:04,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:13:04,397 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:13:04,398 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:13:04,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2022-12-14 05:13:06,937 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:13:07,127 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:13:07,128 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2022-12-14 05:13:07,138 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/data/26d83e873/2c4976ff8c974adab68e79b8df10837a/FLAGa73c5bd6e [2022-12-14 05:13:07,532 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/data/26d83e873/2c4976ff8c974adab68e79b8df10837a [2022-12-14 05:13:07,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:13:07,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:13:07,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:13:07,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:13:07,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:13:07,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:13:07" (1/1) ... [2022-12-14 05:13:07,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ba40b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07, skipping insertion in model container [2022-12-14 05:13:07,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:13:07" (1/1) ... [2022-12-14 05:13:07,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:13:07,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:13:07,766 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_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2022-12-14 05:13:07,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:13:07,776 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:13:07,817 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_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2022-12-14 05:13:07,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:13:07,828 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:13:07,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07 WrapperNode [2022-12-14 05:13:07,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:13:07,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:13:07,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:13:07,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:13:07,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07" (1/1) ... [2022-12-14 05:13:07,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07" (1/1) ... [2022-12-14 05:13:07,865 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 482 [2022-12-14 05:13:07,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:13:07,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:13:07,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:13:07,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:13:07,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07" (1/1) ... [2022-12-14 05:13:07,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07" (1/1) ... [2022-12-14 05:13:07,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07" (1/1) ... [2022-12-14 05:13:07,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07" (1/1) ... [2022-12-14 05:13:07,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07" (1/1) ... [2022-12-14 05:13:07,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07" (1/1) ... [2022-12-14 05:13:07,888 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07" (1/1) ... [2022-12-14 05:13:07,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07" (1/1) ... [2022-12-14 05:13:07,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:13:07,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:13:07,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:13:07,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:13:07,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07" (1/1) ... [2022-12-14 05:13:07,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:13:07,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:13:07,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:13:07,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:13:07,952 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-12-14 05:13:07,952 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-12-14 05:13:07,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:13:07,952 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-12-14 05:13:07,952 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-12-14 05:13:07,953 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-12-14 05:13:07,953 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-12-14 05:13:07,953 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2022-12-14 05:13:07,953 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2022-12-14 05:13:07,953 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 05:13:07,953 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 05:13:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:13:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-12-14 05:13:07,954 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-12-14 05:13:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:13:07,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:13:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-12-14 05:13:07,954 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-12-14 05:13:08,037 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:13:08,039 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:13:08,426 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:13:08,564 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:13:08,565 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 05:13:08,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:13:08 BoogieIcfgContainer [2022-12-14 05:13:08,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:13:08,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:13:08,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:13:08,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:13:08,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:13:07" (1/3) ... [2022-12-14 05:13:08,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255cefd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:13:08, skipping insertion in model container [2022-12-14 05:13:08,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:13:07" (2/3) ... [2022-12-14 05:13:08,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@255cefd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:13:08, skipping insertion in model container [2022-12-14 05:13:08,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:13:08" (3/3) ... [2022-12-14 05:13:08,575 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2022-12-14 05:13:08,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:13:08,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:13:08,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:13:08,641 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;@acb04a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:13:08,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:13:08,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 110 states have (on average 1.5363636363636364) internal successors, (169), 111 states have internal predecessors, (169), 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) [2022-12-14 05:13:08,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 05:13:08,651 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:08,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:08,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash 417223043, now seen corresponding path program 1 times [2022-12-14 05:13:08,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:08,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57654608] [2022-12-14 05:13:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:08,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:13:09,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:09,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57654608] [2022-12-14 05:13:09,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57654608] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:09,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:13:09,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:13:09,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761028160] [2022-12-14 05:13:09,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:09,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:13:09,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:09,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:13:09,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:13:09,104 INFO L87 Difference]: Start difference. First operand has 150 states, 110 states have (on average 1.5363636363636364) internal successors, (169), 111 states have internal predecessors, (169), 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) [2022-12-14 05:13:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:09,208 INFO L93 Difference]: Finished difference Result 301 states and 489 transitions. [2022-12-14 05:13:09,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:13:09,209 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 [2022-12-14 05:13:09,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:09,216 INFO L225 Difference]: With dead ends: 301 [2022-12-14 05:13:09,216 INFO L226 Difference]: Without dead ends: 153 [2022-12-14 05:13:09,219 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 [2022-12-14 05:13:09,221 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 5 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:09,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 638 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:13:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-14 05:13:09,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-12-14 05:13:09,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 113 states have (on average 1.5044247787610618) internal successors, (170), 113 states have internal predecessors, (170), 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) [2022-12-14 05:13:09,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2022-12-14 05:13:09,257 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 19 [2022-12-14 05:13:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:09,258 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2022-12-14 05:13:09,258 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) [2022-12-14 05:13:09,258 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2022-12-14 05:13:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 05:13:09,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:09,259 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:09,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:13:09,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:09,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:09,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1492107668, now seen corresponding path program 1 times [2022-12-14 05:13:09,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:09,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565193924] [2022-12-14 05:13:09,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:09,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:13:09,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:09,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565193924] [2022-12-14 05:13:09,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565193924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:09,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:13:09,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:13:09,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901239465] [2022-12-14 05:13:09,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:09,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:13:09,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:09,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:13:09,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:13:09,420 INFO L87 Difference]: Start difference. First operand 153 states and 232 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 05:13:09,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:09,675 INFO L93 Difference]: Finished difference Result 435 states and 675 transitions. [2022-12-14 05:13:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:13:09,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2022-12-14 05:13:09,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:09,680 INFO L225 Difference]: With dead ends: 435 [2022-12-14 05:13:09,680 INFO L226 Difference]: Without dead ends: 285 [2022-12-14 05:13:09,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:13:09,684 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 573 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:09,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 596 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:13:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-12-14 05:13:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 187. [2022-12-14 05:13:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 142 states have (on average 1.5070422535211268) internal successors, (214), 142 states have internal predecessors, (214), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 05:13:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 282 transitions. [2022-12-14 05:13:09,702 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 282 transitions. Word has length 30 [2022-12-14 05:13:09,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:09,703 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 282 transitions. [2022-12-14 05:13:09,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 05:13:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 282 transitions. [2022-12-14 05:13:09,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 05:13:09,704 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:09,704 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:09,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:13:09,704 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:09,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1268001403, now seen corresponding path program 1 times [2022-12-14 05:13:09,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:09,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693386584] [2022-12-14 05:13:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:09,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:13:09,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:09,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693386584] [2022-12-14 05:13:09,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693386584] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:09,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:13:09,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:13:09,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301869610] [2022-12-14 05:13:09,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:09,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:13:09,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:09,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:13:09,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:13:09,781 INFO L87 Difference]: Start difference. First operand 187 states and 282 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 05:13:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:09,999 INFO L93 Difference]: Finished difference Result 435 states and 673 transitions. [2022-12-14 05:13:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:13:09,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-12-14 05:13:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:10,001 INFO L225 Difference]: With dead ends: 435 [2022-12-14 05:13:10,001 INFO L226 Difference]: Without dead ends: 285 [2022-12-14 05:13:10,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:13:10,003 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 569 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:10,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 599 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:13:10,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-12-14 05:13:10,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 187. [2022-12-14 05:13:10,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 142 states have (on average 1.5) internal successors, (213), 142 states have internal predecessors, (213), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 05:13:10,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 281 transitions. [2022-12-14 05:13:10,020 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 281 transitions. Word has length 31 [2022-12-14 05:13:10,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:10,020 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 281 transitions. [2022-12-14 05:13:10,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 05:13:10,020 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 281 transitions. [2022-12-14 05:13:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 05:13:10,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:10,021 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:10,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 05:13:10,021 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:10,021 INFO L85 PathProgramCache]: Analyzing trace with hash -963253393, now seen corresponding path program 1 times [2022-12-14 05:13:10,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:10,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573040015] [2022-12-14 05:13:10,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:10,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:13:10,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:10,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573040015] [2022-12-14 05:13:10,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573040015] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:10,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:13:10,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:13:10,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311431203] [2022-12-14 05:13:10,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:10,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:13:10,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:10,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:13:10,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:13:10,146 INFO L87 Difference]: Start difference. First operand 187 states and 281 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:13:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:10,197 INFO L93 Difference]: Finished difference Result 342 states and 516 transitions. [2022-12-14 05:13:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:13:10,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-12-14 05:13:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:10,200 INFO L225 Difference]: With dead ends: 342 [2022-12-14 05:13:10,200 INFO L226 Difference]: Without dead ends: 192 [2022-12-14 05:13:10,201 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 [2022-12-14 05:13:10,203 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 6 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:10,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 650 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:13:10,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-12-14 05:13:10,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-12-14 05:13:10,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 146 states have (on average 1.4863013698630136) internal successors, (217), 146 states have internal predecessors, (217), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 05:13:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 285 transitions. [2022-12-14 05:13:10,227 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 285 transitions. Word has length 33 [2022-12-14 05:13:10,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:10,227 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 285 transitions. [2022-12-14 05:13:10,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:13:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 285 transitions. [2022-12-14 05:13:10,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 05:13:10,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:10,229 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:10,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 05:13:10,230 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:10,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:10,230 INFO L85 PathProgramCache]: Analyzing trace with hash 760205813, now seen corresponding path program 1 times [2022-12-14 05:13:10,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:10,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506579248] [2022-12-14 05:13:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:10,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:13:10,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:10,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506579248] [2022-12-14 05:13:10,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506579248] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:10,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:13:10,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:13:10,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862935466] [2022-12-14 05:13:10,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:10,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:13:10,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:10,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:13:10,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:13:10,361 INFO L87 Difference]: Start difference. First operand 192 states and 285 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 05:13:10,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:10,421 INFO L93 Difference]: Finished difference Result 352 states and 527 transitions. [2022-12-14 05:13:10,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:13:10,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-12-14 05:13:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:10,423 INFO L225 Difference]: With dead ends: 352 [2022-12-14 05:13:10,423 INFO L226 Difference]: Without dead ends: 197 [2022-12-14 05:13:10,423 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 [2022-12-14 05:13:10,424 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 6 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:10,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 636 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:13:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-12-14 05:13:10,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-12-14 05:13:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 150 states have (on average 1.4733333333333334) internal successors, (221), 150 states have internal predecessors, (221), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 05:13:10,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2022-12-14 05:13:10,435 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 41 [2022-12-14 05:13:10,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:10,436 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2022-12-14 05:13:10,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 05:13:10,436 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2022-12-14 05:13:10,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 05:13:10,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:10,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:10,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 05:13:10,437 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:10,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:10,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1448994529, now seen corresponding path program 1 times [2022-12-14 05:13:10,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:10,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072262925] [2022-12-14 05:13:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:10,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:13:10,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:10,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072262925] [2022-12-14 05:13:10,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072262925] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:10,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:13:10,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:13:10,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101202462] [2022-12-14 05:13:10,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:10,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:13:10,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:10,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:13:10,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:13:10,533 INFO L87 Difference]: Start difference. First operand 197 states and 289 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 05:13:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:10,591 INFO L93 Difference]: Finished difference Result 361 states and 531 transitions. [2022-12-14 05:13:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:13:10,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2022-12-14 05:13:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:10,593 INFO L225 Difference]: With dead ends: 361 [2022-12-14 05:13:10,593 INFO L226 Difference]: Without dead ends: 201 [2022-12-14 05:13:10,593 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 [2022-12-14 05:13:10,594 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 5 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:10,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 645 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:13:10,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-14 05:13:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-12-14 05:13:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 153 states have (on average 1.4640522875816993) internal successors, (224), 153 states have internal predecessors, (224), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 05:13:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2022-12-14 05:13:10,605 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 49 [2022-12-14 05:13:10,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:10,605 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2022-12-14 05:13:10,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 05:13:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2022-12-14 05:13:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 05:13:10,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:10,606 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:10,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 05:13:10,606 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:10,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash 947464774, now seen corresponding path program 1 times [2022-12-14 05:13:10,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:10,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351584599] [2022-12-14 05:13:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:10,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:13:10,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:10,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351584599] [2022-12-14 05:13:10,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351584599] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:10,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:13:10,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:13:10,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901025531] [2022-12-14 05:13:10,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:10,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:13:10,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:10,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:13:10,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:13:10,711 INFO L87 Difference]: Start difference. First operand 201 states and 292 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 05:13:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:10,768 INFO L93 Difference]: Finished difference Result 370 states and 541 transitions. [2022-12-14 05:13:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:13:10,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2022-12-14 05:13:10,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:10,769 INFO L225 Difference]: With dead ends: 370 [2022-12-14 05:13:10,769 INFO L226 Difference]: Without dead ends: 206 [2022-12-14 05:13:10,770 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 [2022-12-14 05:13:10,770 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 6 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:10,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 636 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:13:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-12-14 05:13:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-12-14 05:13:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 157 states have (on average 1.4522292993630572) internal successors, (228), 157 states have internal predecessors, (228), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 05:13:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 296 transitions. [2022-12-14 05:13:10,781 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 296 transitions. Word has length 49 [2022-12-14 05:13:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:10,781 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 296 transitions. [2022-12-14 05:13:10,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 05:13:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 296 transitions. [2022-12-14 05:13:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 05:13:10,782 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:10,782 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:10,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 05:13:10,782 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:10,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:10,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1175154758, now seen corresponding path program 1 times [2022-12-14 05:13:10,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:10,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367737159] [2022-12-14 05:13:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:10,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 05:13:10,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:10,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367737159] [2022-12-14 05:13:10,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367737159] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:10,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:13:10,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:13:10,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033637234] [2022-12-14 05:13:10,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:10,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:13:10,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:10,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:13:10,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:13:10,904 INFO L87 Difference]: Start difference. First operand 206 states and 296 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 05:13:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:10,955 INFO L93 Difference]: Finished difference Result 381 states and 548 transitions. [2022-12-14 05:13:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:13:10,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 57 [2022-12-14 05:13:10,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:10,958 INFO L225 Difference]: With dead ends: 381 [2022-12-14 05:13:10,958 INFO L226 Difference]: Without dead ends: 212 [2022-12-14 05:13:10,959 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 [2022-12-14 05:13:10,960 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 7 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:10,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 647 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:13:10,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-12-14 05:13:10,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-12-14 05:13:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 162 states have (on average 1.4382716049382716) internal successors, (233), 162 states have internal predecessors, (233), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 05:13:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 301 transitions. [2022-12-14 05:13:10,970 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 301 transitions. Word has length 57 [2022-12-14 05:13:10,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:10,971 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 301 transitions. [2022-12-14 05:13:10,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 05:13:10,971 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 301 transitions. [2022-12-14 05:13:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 05:13:10,971 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:10,972 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:10,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 05:13:10,972 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:10,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:10,972 INFO L85 PathProgramCache]: Analyzing trace with hash -719289663, now seen corresponding path program 1 times [2022-12-14 05:13:10,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:10,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124278957] [2022-12-14 05:13:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:10,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:13:11,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:11,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124278957] [2022-12-14 05:13:11,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124278957] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:13:11,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167854513] [2022-12-14 05:13:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:11,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:11,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:13:11,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:13:11,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:13:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:11,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:13:11,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:13:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:13:11,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:13:11,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167854513] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:11,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:13:11,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-12-14 05:13:11,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070415307] [2022-12-14 05:13:11,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:11,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:13:11,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:11,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:13:11,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:13:11,511 INFO L87 Difference]: Start difference. First operand 212 states and 301 transitions. Second operand has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 05:13:11,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:11,728 INFO L93 Difference]: Finished difference Result 601 states and 839 transitions. [2022-12-14 05:13:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 05:13:11,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 60 [2022-12-14 05:13:11,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:11,730 INFO L225 Difference]: With dead ends: 601 [2022-12-14 05:13:11,730 INFO L226 Difference]: Without dead ends: 400 [2022-12-14 05:13:11,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-12-14 05:13:11,731 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 220 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:11,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1114 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:13:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-12-14 05:13:11,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 396. [2022-12-14 05:13:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 300 states have (on average 1.42) internal successors, (426), 301 states have internal predecessors, (426), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2022-12-14 05:13:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 556 transitions. [2022-12-14 05:13:11,754 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 556 transitions. Word has length 60 [2022-12-14 05:13:11,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:11,754 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 556 transitions. [2022-12-14 05:13:11,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 05:13:11,755 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 556 transitions. [2022-12-14 05:13:11,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 05:13:11,755 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:11,755 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:11,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:13:11,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:11,956 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:11,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:11,957 INFO L85 PathProgramCache]: Analyzing trace with hash 704856508, now seen corresponding path program 1 times [2022-12-14 05:13:11,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:11,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617744967] [2022-12-14 05:13:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:11,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:13:12,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:12,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617744967] [2022-12-14 05:13:12,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617744967] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:13:12,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730296365] [2022-12-14 05:13:12,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:12,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:12,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:13:12,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:13:12,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:13:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:12,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:13:12,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:13:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:13:12,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:13:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:13:12,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730296365] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:13:12,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [584346720] [2022-12-14 05:13:12,757 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-12-14 05:13:12,758 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:13:12,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:13:12,766 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:13:12,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:13:15,270 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 05:13:15,295 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 05:13:15,311 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 05:13:15,365 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:13:27,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [584346720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:27,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:13:27,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-12-14 05:13:27,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741335294] [2022-12-14 05:13:27,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:27,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 05:13:27,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:27,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 05:13:27,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 05:13:27,683 INFO L87 Difference]: Start difference. First operand 396 states and 556 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 05:13:31,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:31,828 INFO L93 Difference]: Finished difference Result 821 states and 1160 transitions. [2022-12-14 05:13:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 05:13:31,829 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2022-12-14 05:13:31,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:31,833 INFO L225 Difference]: With dead ends: 821 [2022-12-14 05:13:31,833 INFO L226 Difference]: Without dead ends: 465 [2022-12-14 05:13:31,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 05:13:31,834 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 120 mSDsluCounter, 2251 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 2533 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:31,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 2533 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 05:13:31,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-12-14 05:13:31,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 442. [2022-12-14 05:13:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 331 states have (on average 1.3987915407854985) internal successors, (463), 332 states have internal predecessors, (463), 78 states have call successors, (78), 32 states have call predecessors, (78), 32 states have return successors, (78), 77 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 05:13:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 619 transitions. [2022-12-14 05:13:31,877 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 619 transitions. Word has length 62 [2022-12-14 05:13:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:31,878 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 619 transitions. [2022-12-14 05:13:31,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 05:13:31,878 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 619 transitions. [2022-12-14 05:13:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 05:13:31,879 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:31,879 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:31,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:13:32,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:32,079 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash -154619428, now seen corresponding path program 1 times [2022-12-14 05:13:32,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:32,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230760239] [2022-12-14 05:13:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:32,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:13:32,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:32,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230760239] [2022-12-14 05:13:32,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230760239] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:13:32,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543229056] [2022-12-14 05:13:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:32,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:32,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:13:32,390 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:13:32,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:13:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:32,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:13:32,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:13:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:13:32,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:13:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:13:32,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543229056] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:13:32,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100900566] [2022-12-14 05:13:32,753 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-12-14 05:13:32,753 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:13:32,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:13:32,753 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:13:32,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:13:34,256 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 05:13:34,280 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 05:13:34,296 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 05:13:34,341 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:13:46,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [100900566] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:13:46,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:13:46,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-12-14 05:13:46,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792970427] [2022-12-14 05:13:46,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:13:46,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 05:13:46,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:13:46,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 05:13:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 05:13:46,454 INFO L87 Difference]: Start difference. First operand 442 states and 619 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 05:13:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:51,992 INFO L93 Difference]: Finished difference Result 890 states and 1256 transitions. [2022-12-14 05:13:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 05:13:51,993 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 62 [2022-12-14 05:13:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:51,995 INFO L225 Difference]: With dead ends: 890 [2022-12-14 05:13:51,995 INFO L226 Difference]: Without dead ends: 523 [2022-12-14 05:13:51,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 05:13:51,996 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 77 mSDsluCounter, 3406 mSDsCounter, 0 mSdLazyCounter, 2408 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 3685 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:51,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 3685 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2408 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-12-14 05:13:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-12-14 05:13:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 500. [2022-12-14 05:13:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 372 states have (on average 1.3709677419354838) internal successors, (510), 373 states have internal predecessors, (510), 92 states have call successors, (92), 35 states have call predecessors, (92), 35 states have return successors, (92), 91 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-14 05:13:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 694 transitions. [2022-12-14 05:13:52,084 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 694 transitions. Word has length 62 [2022-12-14 05:13:52,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:52,084 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 694 transitions. [2022-12-14 05:13:52,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 05:13:52,085 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 694 transitions. [2022-12-14 05:13:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 05:13:52,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:52,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:52,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:13:52,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 05:13:52,287 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:13:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:52,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2107894249, now seen corresponding path program 1 times [2022-12-14 05:13:52,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:13:52,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579808516] [2022-12-14 05:13:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:52,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:13:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:13:52,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:52,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579808516] [2022-12-14 05:13:52,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579808516] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:13:52,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084978226] [2022-12-14 05:13:52,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:13:52,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:52,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:13:52,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:13:52,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:13:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:52,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:13:52,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:13:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:13:52,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:13:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:13:52,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084978226] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:13:52,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [72286294] [2022-12-14 05:13:52,941 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2022-12-14 05:13:52,942 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:13:52,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:13:52,942 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:13:52,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:13:55,043 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 05:13:55,065 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 05:13:55,081 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 05:13:55,124 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:14:09,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [72286294] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:14:09,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:14:09,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [9, 9, 9] total 38 [2022-12-14 05:14:09,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88086036] [2022-12-14 05:14:09,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:14:09,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 05:14:09,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:14:09,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 05:14:09,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 05:14:09,443 INFO L87 Difference]: Start difference. First operand 500 states and 694 transitions. Second operand has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 05:14:15,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:14:15,264 INFO L93 Difference]: Finished difference Result 925 states and 1301 transitions. [2022-12-14 05:14:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 05:14:15,265 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 64 [2022-12-14 05:14:15,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:14:15,268 INFO L225 Difference]: With dead ends: 925 [2022-12-14 05:14:15,269 INFO L226 Difference]: Without dead ends: 569 [2022-12-14 05:14:15,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 05:14:15,271 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 74 mSDsluCounter, 3647 mSDsCounter, 0 mSdLazyCounter, 2421 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 3967 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:14:15,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 3967 Invalid, 2435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2421 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 05:14:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-12-14 05:14:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 520. [2022-12-14 05:14:15,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 386 states have (on average 1.3523316062176165) internal successors, (522), 387 states have internal predecessors, (522), 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) [2022-12-14 05:14:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 716 transitions. [2022-12-14 05:14:15,384 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 716 transitions. Word has length 64 [2022-12-14 05:14:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:14:15,384 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 716 transitions. [2022-12-14 05:14:15,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 05:14:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 716 transitions. [2022-12-14 05:14:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 05:14:15,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:14:15,385 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] [2022-12-14 05:14:15,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:14:15,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 05:14:15,586 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:14:15,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:14:15,586 INFO L85 PathProgramCache]: Analyzing trace with hash 940244338, now seen corresponding path program 1 times [2022-12-14 05:14:15,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:14:15,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281619012] [2022-12-14 05:14:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:15,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:14:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:14:15,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:14:15,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281619012] [2022-12-14 05:14:15,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281619012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:14:15,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:14:15,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:14:15,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145910785] [2022-12-14 05:14:15,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:14:15,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:14:15,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:14:15,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:14:15,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:14:15,679 INFO L87 Difference]: Start difference. First operand 520 states and 716 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 05:14:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:14:15,811 INFO L93 Difference]: Finished difference Result 932 states and 1310 transitions. [2022-12-14 05:14:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:14:15,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2022-12-14 05:14:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:14:15,813 INFO L225 Difference]: With dead ends: 932 [2022-12-14 05:14:15,813 INFO L226 Difference]: Without dead ends: 528 [2022-12-14 05:14:15,814 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 [2022-12-14 05:14:15,814 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 5 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:14:15,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 645 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:14:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-12-14 05:14:15,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2022-12-14 05:14:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 392 states have (on average 1.346938775510204) internal successors, (528), 393 states have internal predecessors, (528), 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) [2022-12-14 05:14:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 722 transitions. [2022-12-14 05:14:15,918 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 722 transitions. Word has length 66 [2022-12-14 05:14:15,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:14:15,918 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 722 transitions. [2022-12-14 05:14:15,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 05:14:15,919 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 722 transitions. [2022-12-14 05:14:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 05:14:15,920 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:14:15,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:14:15,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 05:14:15,920 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:14:15,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:14:15,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1228117876, now seen corresponding path program 1 times [2022-12-14 05:14:15,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:14:15,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280913544] [2022-12-14 05:14:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:15,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:14:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:14:16,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:14:16,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280913544] [2022-12-14 05:14:16,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280913544] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:14:16,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112126343] [2022-12-14 05:14:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:16,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:14:16,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:14:16,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:14:16,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:14:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:16,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:14:16,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:14:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:14:16,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:14:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:14:16,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112126343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:14:16,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1860048941] [2022-12-14 05:14:16,566 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2022-12-14 05:14:16,566 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:14:16,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:14:16,567 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:14:16,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:14:19,941 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 231 for LOIs [2022-12-14 05:14:20,132 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 05:14:20,149 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 192 for LOIs [2022-12-14 05:14:20,264 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 154 for LOIs [2022-12-14 05:14:20,297 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-12-14 05:14:20,341 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 05:14:20,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:14:53,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16646#(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 [2022-12-14 05:14:53,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:14:53,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:14:53,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-12-14 05:14:53,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724475409] [2022-12-14 05:14:53,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:14:53,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 05:14:53,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:14:53,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 05:14:53,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2707, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 05:14:53,240 INFO L87 Difference]: Start difference. First operand 528 states and 722 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 05:14:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:14:53,759 INFO L93 Difference]: Finished difference Result 1272 states and 1774 transitions. [2022-12-14 05:14:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 05:14:53,760 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 70 [2022-12-14 05:14:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:14:53,763 INFO L225 Difference]: With dead ends: 1272 [2022-12-14 05:14:53,763 INFO L226 Difference]: Without dead ends: 876 [2022-12-14 05:14:53,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 150 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=287, Invalid=3253, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 05:14:53,764 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 306 mSDsluCounter, 3185 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 3531 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:14:53,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 3531 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:14:53,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-12-14 05:14:53,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 550. [2022-12-14 05:14:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 407 states have (on average 1.3095823095823096) internal successors, (533), 410 states have internal predecessors, (533), 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) [2022-12-14 05:14:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 723 transitions. [2022-12-14 05:14:53,911 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 723 transitions. Word has length 70 [2022-12-14 05:14:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:14:53,911 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 723 transitions. [2022-12-14 05:14:53,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 05:14:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 723 transitions. [2022-12-14 05:14:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 05:14:53,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:14:53,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:14:53,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:14:54,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:14:54,114 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:14:54,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:14:54,115 INFO L85 PathProgramCache]: Analyzing trace with hash -796085950, now seen corresponding path program 1 times [2022-12-14 05:14:54,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:14:54,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311128079] [2022-12-14 05:14:54,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:54,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:14:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:14:54,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:14:54,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311128079] [2022-12-14 05:14:54,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311128079] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:14:54,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:14:54,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 05:14:54,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169495534] [2022-12-14 05:14:54,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:14:54,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:14:54,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:14:54,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:14:54,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:14:54,345 INFO L87 Difference]: Start difference. First operand 550 states and 723 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:14:55,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:14:55,005 INFO L93 Difference]: Finished difference Result 1212 states and 1676 transitions. [2022-12-14 05:14:55,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:14:55,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 71 [2022-12-14 05:14:55,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:14:55,009 INFO L225 Difference]: With dead ends: 1212 [2022-12-14 05:14:55,009 INFO L226 Difference]: Without dead ends: 900 [2022-12-14 05:14:55,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:14:55,010 INFO L413 NwaCegarLoop]: 416 mSDtfsCounter, 675 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:14:55,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 1664 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:14:55,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-12-14 05:14:55,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 684. [2022-12-14 05:14:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 504 states have (on average 1.3115079365079365) internal successors, (661), 507 states have internal predecessors, (661), 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) [2022-12-14 05:14:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 899 transitions. [2022-12-14 05:14:55,159 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 899 transitions. Word has length 71 [2022-12-14 05:14:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:14:55,160 INFO L495 AbstractCegarLoop]: Abstraction has 684 states and 899 transitions. [2022-12-14 05:14:55,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 05:14:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 899 transitions. [2022-12-14 05:14:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 05:14:55,160 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:14:55,160 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:14:55,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 05:14:55,161 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:14:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:14:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1444938409, now seen corresponding path program 1 times [2022-12-14 05:14:55,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:14:55,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436597771] [2022-12-14 05:14:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:55,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:14:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:14:55,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:14:55,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436597771] [2022-12-14 05:14:55,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436597771] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:14:55,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:14:55,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 05:14:55,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283124965] [2022-12-14 05:14:55,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:14:55,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:14:55,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:14:55,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:14:55,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:14:55,312 INFO L87 Difference]: Start difference. First operand 684 states and 899 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 05:14:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:14:56,161 INFO L93 Difference]: Finished difference Result 1587 states and 2196 transitions. [2022-12-14 05:14:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:14:56,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2022-12-14 05:14:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:14:56,165 INFO L225 Difference]: With dead ends: 1587 [2022-12-14 05:14:56,165 INFO L226 Difference]: Without dead ends: 1245 [2022-12-14 05:14:56,166 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 [2022-12-14 05:14:56,166 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 734 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:14:56,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 2083 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:14:56,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-12-14 05:14:56,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 952. [2022-12-14 05:14:56,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 697 states have (on average 1.3228120516499282) internal successors, (922), 702 states have internal predecessors, (922), 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) [2022-12-14 05:14:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1260 transitions. [2022-12-14 05:14:56,344 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1260 transitions. Word has length 73 [2022-12-14 05:14:56,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:14:56,344 INFO L495 AbstractCegarLoop]: Abstraction has 952 states and 1260 transitions. [2022-12-14 05:14:56,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 05:14:56,344 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1260 transitions. [2022-12-14 05:14:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 05:14:56,345 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:14:56,345 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:14:56,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 05:14:56,345 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:14:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:14:56,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1141883324, now seen corresponding path program 1 times [2022-12-14 05:14:56,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:14:56,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865077464] [2022-12-14 05:14:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:56,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:14:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 05:14:56,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:14:56,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865077464] [2022-12-14 05:14:56,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865077464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:14:56,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859574777] [2022-12-14 05:14:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:56,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:14:56,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:14:56,543 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:14:56,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:14:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:56,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:14:56,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:14:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:14:56,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:14:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 05:14:56,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859574777] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:14:56,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [709692789] [2022-12-14 05:14:56,813 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-12-14 05:14:56,813 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:14:56,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:14:56,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:14:56,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:15:00,041 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 05:15:00,062 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 05:15:00,077 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 05:15:00,145 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 05:15:00,201 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:15:21,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [709692789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:15:21,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:15:21,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [8, 9, 9] total 47 [2022-12-14 05:15:21,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98363003] [2022-12-14 05:15:21,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:15:21,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 05:15:21,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:15:21,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 05:15:21,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 05:15:21,560 INFO L87 Difference]: Start difference. First operand 952 states and 1260 transitions. Second operand has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 05:15:27,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:15:27,675 INFO L93 Difference]: Finished difference Result 1539 states and 2059 transitions. [2022-12-14 05:15:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 05:15:27,676 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 77 [2022-12-14 05:15:27,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:15:27,679 INFO L225 Difference]: With dead ends: 1539 [2022-12-14 05:15:27,679 INFO L226 Difference]: Without dead ends: 938 [2022-12-14 05:15:27,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 05:15:27,680 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 68 mSDsluCounter, 2772 mSDsCounter, 0 mSdLazyCounter, 2587 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:15:27,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 2974 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2587 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 05:15:27,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-12-14 05:15:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 938. [2022-12-14 05:15:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 687 states have (on average 1.321688500727802) internal successors, (908), 692 states have internal predecessors, (908), 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) [2022-12-14 05:15:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1240 transitions. [2022-12-14 05:15:27,859 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1240 transitions. Word has length 77 [2022-12-14 05:15:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:15:27,859 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1240 transitions. [2022-12-14 05:15:27,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 05:15:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1240 transitions. [2022-12-14 05:15:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 05:15:27,860 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:15:27,860 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:15:27,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 05:15:28,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 05:15:28,062 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:15:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:15:28,063 INFO L85 PathProgramCache]: Analyzing trace with hash 802720292, now seen corresponding path program 1 times [2022-12-14 05:15:28,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:15:28,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339917936] [2022-12-14 05:15:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:28,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:15:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 05:15:28,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:15:28,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339917936] [2022-12-14 05:15:28,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339917936] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:15:28,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831856431] [2022-12-14 05:15:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:28,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:15:28,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:15:28,361 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:15:28,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:15:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:28,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:15:28,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:15:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:15:28,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:15:28,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831856431] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:15:28,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:15:28,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 05:15:28,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076442545] [2022-12-14 05:15:28,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:15:28,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:15:28,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:15:28,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:15:28,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:15:28,551 INFO L87 Difference]: Start difference. First operand 938 states and 1240 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 05:15:29,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:15:29,284 INFO L93 Difference]: Finished difference Result 1839 states and 2507 transitions. [2022-12-14 05:15:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:15:29,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2022-12-14 05:15:29,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:15:29,287 INFO L225 Difference]: With dead ends: 1839 [2022-12-14 05:15:29,287 INFO L226 Difference]: Without dead ends: 1121 [2022-12-14 05:15:29,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-12-14 05:15:29,289 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 519 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:15:29,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 1769 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:15:29,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2022-12-14 05:15:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 938. [2022-12-14 05:15:29,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 687 states have (on average 1.3158660844250365) internal successors, (904), 692 states have internal predecessors, (904), 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) [2022-12-14 05:15:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1236 transitions. [2022-12-14 05:15:29,455 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1236 transitions. Word has length 77 [2022-12-14 05:15:29,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:15:29,455 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1236 transitions. [2022-12-14 05:15:29,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 05:15:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1236 transitions. [2022-12-14 05:15:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 05:15:29,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:15:29,456 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:15:29,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 05:15:29,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 05:15:29,656 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:15:29,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:15:29,657 INFO L85 PathProgramCache]: Analyzing trace with hash 617504508, now seen corresponding path program 1 times [2022-12-14 05:15:29,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:15:29,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291082971] [2022-12-14 05:15:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:29,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:15:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 05:15:29,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:15:29,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291082971] [2022-12-14 05:15:29,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291082971] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:15:29,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:15:29,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:15:29,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369744352] [2022-12-14 05:15:29,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:15:29,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:15:29,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:15:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:15:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:15:29,781 INFO L87 Difference]: Start difference. First operand 938 states and 1236 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 05:15:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:15:30,121 INFO L93 Difference]: Finished difference Result 1245 states and 1718 transitions. [2022-12-14 05:15:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:15:30,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 80 [2022-12-14 05:15:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:15:30,124 INFO L225 Difference]: With dead ends: 1245 [2022-12-14 05:15:30,124 INFO L226 Difference]: Without dead ends: 1243 [2022-12-14 05:15:30,125 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 [2022-12-14 05:15:30,125 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 173 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:15:30,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1546 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:15:30,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-12-14 05:15:30,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 946. [2022-12-14 05:15:30,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 691 states have (on average 1.3140376266280753) internal successors, (908), 698 states have internal predecessors, (908), 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) [2022-12-14 05:15:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1244 transitions. [2022-12-14 05:15:30,300 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1244 transitions. Word has length 80 [2022-12-14 05:15:30,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:15:30,300 INFO L495 AbstractCegarLoop]: Abstraction has 946 states and 1244 transitions. [2022-12-14 05:15:30,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 05:15:30,300 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1244 transitions. [2022-12-14 05:15:30,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 05:15:30,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:15:30,301 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:15:30,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 05:15:30,301 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:15:30,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:15:30,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1575215116, now seen corresponding path program 1 times [2022-12-14 05:15:30,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:15:30,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895950707] [2022-12-14 05:15:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:30,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:15:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 05:15:30,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:15:30,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895950707] [2022-12-14 05:15:30,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895950707] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:15:30,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:15:30,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:15:30,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585242624] [2022-12-14 05:15:30,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:15:30,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:15:30,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:15:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:15:30,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:15:30,408 INFO L87 Difference]: Start difference. First operand 946 states and 1244 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 05:15:30,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:15:30,703 INFO L93 Difference]: Finished difference Result 1630 states and 2160 transitions. [2022-12-14 05:15:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:15:30,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 83 [2022-12-14 05:15:30,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:15:30,710 INFO L225 Difference]: With dead ends: 1630 [2022-12-14 05:15:30,710 INFO L226 Difference]: Without dead ends: 934 [2022-12-14 05:15:30,712 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 [2022-12-14 05:15:30,712 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 7 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:15:30,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 637 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:15:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-12-14 05:15:30,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 934. [2022-12-14 05:15:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 685 states have (on average 1.2905109489051094) internal successors, (884), 692 states have internal predecessors, (884), 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) [2022-12-14 05:15:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1208 transitions. [2022-12-14 05:15:30,904 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1208 transitions. Word has length 83 [2022-12-14 05:15:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:15:30,904 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1208 transitions. [2022-12-14 05:15:30,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 05:15:30,905 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1208 transitions. [2022-12-14 05:15:30,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 05:15:30,905 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:15:30,905 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:15:30,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 05:15:30,906 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:15:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:15:30,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1310682326, now seen corresponding path program 1 times [2022-12-14 05:15:30,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:15:30,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216749349] [2022-12-14 05:15:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:30,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:15:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 05:15:31,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:15:31,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216749349] [2022-12-14 05:15:31,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216749349] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:15:31,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358919630] [2022-12-14 05:15:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:31,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:15:31,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:15:31,303 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:15:31,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:15:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:31,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:15:31,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:15:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 05:15:31,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:15:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 05:15:31,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358919630] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:15:31,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1157502606] [2022-12-14 05:15:31,778 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-12-14 05:15:31,778 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:15:31,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:15:31,778 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:15:31,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:15:35,920 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 241 for LOIs [2022-12-14 05:15:36,116 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 05:15:36,132 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 123 for LOIs [2022-12-14 05:15:36,217 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 157 for LOIs [2022-12-14 05:15:36,250 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-12-14 05:15:36,294 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 05:15:36,335 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:16:16,945 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39383#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (not (= (mod ~side1Failed_History_0~0 256) 0)) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2p_old~0) (<= 0 ~manual_selection_History_2~0) (= ~side2_written~0 0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= ~manual_selection_History_2~0 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256)))) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 05:16:16,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:16:16,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:16:16,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 20 [2022-12-14 05:16:16,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731696048] [2022-12-14 05:16:16,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:16:16,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 05:16:16,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:16:16,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 05:16:16,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=3893, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 05:16:16,947 INFO L87 Difference]: Start difference. First operand 934 states and 1208 transitions. Second operand has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-14 05:16:18,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:16:18,378 INFO L93 Difference]: Finished difference Result 2273 states and 3140 transitions. [2022-12-14 05:16:18,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 05:16:18,379 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 85 [2022-12-14 05:16:18,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:16:18,383 INFO L225 Difference]: With dead ends: 2273 [2022-12-14 05:16:18,383 INFO L226 Difference]: Without dead ends: 1514 [2022-12-14 05:16:18,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 187 SyntacticMatches, 15 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=604, Invalid=4798, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 05:16:18,385 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 572 mSDsluCounter, 5253 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 5633 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:16:18,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 5633 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 05:16:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2022-12-14 05:16:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 913. [2022-12-14 05:16:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 670 states have (on average 1.2835820895522387) internal successors, (860), 677 states have internal predecessors, (860), 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) [2022-12-14 05:16:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1172 transitions. [2022-12-14 05:16:18,567 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1172 transitions. Word has length 85 [2022-12-14 05:16:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:16:18,567 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1172 transitions. [2022-12-14 05:16:18,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 6.4) internal successors, (96), 18 states have internal predecessors, (96), 6 states have call successors, (26), 3 states have call predecessors, (26), 9 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-14 05:16:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1172 transitions. [2022-12-14 05:16:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 05:16:18,568 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:16:18,568 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:16:18,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:16:18,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 05:16:18,769 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:16:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:16:18,770 INFO L85 PathProgramCache]: Analyzing trace with hash 311812980, now seen corresponding path program 1 times [2022-12-14 05:16:18,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:16:18,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278964057] [2022-12-14 05:16:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:18,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:16:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 05:16:18,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:16:18,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278964057] [2022-12-14 05:16:18,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278964057] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:16:18,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086871203] [2022-12-14 05:16:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:18,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:16:18,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:16:18,981 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:16:18,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:16:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:19,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:16:19,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:16:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:16:19,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:16:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 05:16:19,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086871203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:16:19,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [27037080] [2022-12-14 05:16:19,221 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-12-14 05:16:19,221 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:16:19,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:16:19,221 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:16:19,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:16:21,868 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 05:16:21,889 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 05:16:21,905 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-12-14 05:16:21,995 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 152 for LOIs [2022-12-14 05:16:22,038 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 05:16:22,080 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:16:50,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [27037080] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:16:50,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:16:50,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-12-14 05:16:50,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696084876] [2022-12-14 05:16:50,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:16:50,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 05:16:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:16:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 05:16:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 05:16:50,164 INFO L87 Difference]: Start difference. First operand 913 states and 1172 transitions. Second operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 05:16:57,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:16:57,578 INFO L93 Difference]: Finished difference Result 1540 states and 2012 transitions. [2022-12-14 05:16:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 05:16:57,579 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 85 [2022-12-14 05:16:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:16:57,582 INFO L225 Difference]: With dead ends: 1540 [2022-12-14 05:16:57,582 INFO L226 Difference]: Without dead ends: 948 [2022-12-14 05:16:57,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 199 SyntacticMatches, 14 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 05:16:57,583 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 163 mSDsluCounter, 4345 mSDsCounter, 0 mSdLazyCounter, 3627 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 4632 SdHoareTripleChecker+Invalid, 3683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:16:57,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 4632 Invalid, 3683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3627 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-12-14 05:16:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-12-14 05:16:57,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 916. [2022-12-14 05:16:57,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 672 states have (on average 1.2827380952380953) internal successors, (862), 679 states have internal predecessors, (862), 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) [2022-12-14 05:16:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1176 transitions. [2022-12-14 05:16:57,762 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1176 transitions. Word has length 85 [2022-12-14 05:16:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:16:57,763 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1176 transitions. [2022-12-14 05:16:57,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 05:16:57,763 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1176 transitions. [2022-12-14 05:16:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 05:16:57,763 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:16:57,764 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:16:57,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 05:16:57,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:16:57,965 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:16:57,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:16:57,966 INFO L85 PathProgramCache]: Analyzing trace with hash -506598183, now seen corresponding path program 1 times [2022-12-14 05:16:57,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:16:57,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873748740] [2022-12-14 05:16:57,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:57,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:16:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 05:16:58,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:16:58,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873748740] [2022-12-14 05:16:58,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873748740] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:16:58,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878507925] [2022-12-14 05:16:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:58,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:16:58,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:16:58,190 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:16:58,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 05:16:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:58,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:16:58,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:16:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:16:58,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:16:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 05:16:58,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878507925] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:16:58,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [617979490] [2022-12-14 05:16:58,417 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 05:16:58,417 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:16:58,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:16:58,418 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:16:58,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:17:01,189 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 05:17:01,210 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 05:17:01,226 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-12-14 05:17:01,314 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-12-14 05:17:01,357 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 05:17:01,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:17:30,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [617979490] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:17:30,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:17:30,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [8, 9, 9] total 55 [2022-12-14 05:17:30,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995307785] [2022-12-14 05:17:30,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:17:30,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 05:17:30,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:17:30,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 05:17:30,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 05:17:30,990 INFO L87 Difference]: Start difference. First operand 916 states and 1176 transitions. Second operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 05:17:40,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:17:40,454 INFO L93 Difference]: Finished difference Result 1543 states and 2016 transitions. [2022-12-14 05:17:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 05:17:40,455 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 87 [2022-12-14 05:17:40,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:17:40,457 INFO L225 Difference]: With dead ends: 1543 [2022-12-14 05:17:40,457 INFO L226 Difference]: Without dead ends: 951 [2022-12-14 05:17:40,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 206 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=257, Invalid=2823, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 05:17:40,459 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 227 mSDsluCounter, 4921 mSDsCounter, 0 mSdLazyCounter, 3990 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 5228 SdHoareTripleChecker+Invalid, 4064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:17:40,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 5228 Invalid, 4064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3990 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-12-14 05:17:40,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-12-14 05:17:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 919. [2022-12-14 05:17:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 674 states have (on average 1.281899109792285) internal successors, (864), 681 states have internal predecessors, (864), 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) [2022-12-14 05:17:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1180 transitions. [2022-12-14 05:17:40,646 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1180 transitions. Word has length 87 [2022-12-14 05:17:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:17:40,647 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1180 transitions. [2022-12-14 05:17:40,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 05:17:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1180 transitions. [2022-12-14 05:17:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 05:17:40,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:17:40,648 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:17:40,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 05:17:40,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:17:40,849 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:17:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:17:40,849 INFO L85 PathProgramCache]: Analyzing trace with hash 131052322, now seen corresponding path program 1 times [2022-12-14 05:17:40,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:17:40,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827525610] [2022-12-14 05:17:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:17:40,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:17:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:17:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 05:17:40,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:17:40,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827525610] [2022-12-14 05:17:40,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827525610] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:17:40,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:17:40,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:17:40,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041958290] [2022-12-14 05:17:40,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:17:40,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:17:40,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:17:40,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:17:40,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:17:40,969 INFO L87 Difference]: Start difference. First operand 919 states and 1180 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-12-14 05:17:41,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:17:41,205 INFO L93 Difference]: Finished difference Result 1564 states and 2030 transitions. [2022-12-14 05:17:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:17:41,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 92 [2022-12-14 05:17:41,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:17:41,208 INFO L225 Difference]: With dead ends: 1564 [2022-12-14 05:17:41,208 INFO L226 Difference]: Without dead ends: 907 [2022-12-14 05:17:41,208 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 [2022-12-14 05:17:41,209 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 7 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:17:41,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 619 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:17:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-12-14 05:17:41,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 907. [2022-12-14 05:17:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 668 states have (on average 1.2574850299401197) internal successors, (840), 675 states have internal predecessors, (840), 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) [2022-12-14 05:17:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1144 transitions. [2022-12-14 05:17:41,395 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1144 transitions. Word has length 92 [2022-12-14 05:17:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:17:41,396 INFO L495 AbstractCegarLoop]: Abstraction has 907 states and 1144 transitions. [2022-12-14 05:17:41,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-12-14 05:17:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1144 transitions. [2022-12-14 05:17:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 05:17:41,397 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:17:41,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:17:41,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 05:17:41,397 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:17:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:17:41,397 INFO L85 PathProgramCache]: Analyzing trace with hash -601756257, now seen corresponding path program 1 times [2022-12-14 05:17:41,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:17:41,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293369500] [2022-12-14 05:17:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:17:41,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:17:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:17:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 05:17:41,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:17:41,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293369500] [2022-12-14 05:17:41,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293369500] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:17:41,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5261313] [2022-12-14 05:17:41,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:17:41,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:17:41,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:17:41,564 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:17:41,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 05:17:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:17:41,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:17:41,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:17:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:17:41,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:17:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 05:17:41,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5261313] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:17:41,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2141949865] [2022-12-14 05:17:41,830 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 05:17:41,830 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:17:41,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:17:41,830 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:17:41,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:17:44,936 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 05:17:44,957 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 05:17:44,973 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-12-14 05:17:45,072 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 202 for LOIs [2022-12-14 05:17:45,421 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 05:17:45,463 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:18:18,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2141949865] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:18:18,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:18:18,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-12-14 05:18:18,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076353115] [2022-12-14 05:18:18,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:18:18,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 05:18:18,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:18:18,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 05:18:18,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 05:18:18,140 INFO L87 Difference]: Start difference. First operand 907 states and 1144 transitions. Second operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 05:18:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:18:26,277 INFO L93 Difference]: Finished difference Result 1513 states and 1939 transitions. [2022-12-14 05:18:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 05:18:26,278 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 92 [2022-12-14 05:18:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:18:26,280 INFO L225 Difference]: With dead ends: 1513 [2022-12-14 05:18:26,280 INFO L226 Difference]: Without dead ends: 929 [2022-12-14 05:18:26,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 221 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 05:18:26,282 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 107 mSDsluCounter, 4325 mSDsCounter, 0 mSdLazyCounter, 3714 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 4593 SdHoareTripleChecker+Invalid, 3745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:18:26,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 4593 Invalid, 3745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3714 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-12-14 05:18:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-12-14 05:18:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 894. [2022-12-14 05:18:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 659 states have (on average 1.2549317147192716) internal successors, (827), 666 states have internal predecessors, (827), 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) [2022-12-14 05:18:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1123 transitions. [2022-12-14 05:18:26,494 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1123 transitions. Word has length 92 [2022-12-14 05:18:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:18:26,495 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1123 transitions. [2022-12-14 05:18:26,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 05:18:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1123 transitions. [2022-12-14 05:18:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 05:18:26,496 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:18:26,496 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:18:26,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 05:18:26,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 05:18:26,697 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:18:26,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:18:26,698 INFO L85 PathProgramCache]: Analyzing trace with hash -464226150, now seen corresponding path program 1 times [2022-12-14 05:18:26,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:18:26,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663208824] [2022-12-14 05:18:26,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:18:26,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:18:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:18:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 05:18:26,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:18:26,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663208824] [2022-12-14 05:18:26,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663208824] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:18:26,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979079744] [2022-12-14 05:18:26,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:18:26,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:18:26,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:18:26,910 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:18:26,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:18:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:18:26,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:18:26,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:18:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:18:27,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:18:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 05:18:27,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979079744] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:18:27,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [732452460] [2022-12-14 05:18:27,170 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-12-14 05:18:27,170 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:18:27,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:18:27,171 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:18:27,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:18:29,950 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 05:18:29,971 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 05:18:29,992 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 198 for LOIs [2022-12-14 05:18:30,314 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-12-14 05:18:30,653 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 05:18:30,694 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:19:05,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [732452460] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:19:05,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:19:05,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-12-14 05:19:05,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060545927] [2022-12-14 05:19:05,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:19:05,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 05:19:05,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:19:05,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 05:19:05,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2830, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 05:19:05,480 INFO L87 Difference]: Start difference. First operand 894 states and 1123 transitions. Second operand has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 05:19:14,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:19:14,733 INFO L93 Difference]: Finished difference Result 1513 states and 1939 transitions. [2022-12-14 05:19:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 05:19:14,733 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 94 [2022-12-14 05:19:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:19:14,737 INFO L225 Difference]: With dead ends: 1513 [2022-12-14 05:19:14,737 INFO L226 Difference]: Without dead ends: 926 [2022-12-14 05:19:14,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 225 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=258, Invalid=2934, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 05:19:14,738 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 166 mSDsluCounter, 4962 mSDsCounter, 0 mSdLazyCounter, 4323 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 5253 SdHoareTripleChecker+Invalid, 4363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:19:14,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 5253 Invalid, 4363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4323 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-12-14 05:19:14,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-12-14 05:19:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 894. [2022-12-14 05:19:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 659 states have (on average 1.2534142640364188) internal successors, (826), 666 states have internal predecessors, (826), 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) [2022-12-14 05:19:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1122 transitions. [2022-12-14 05:19:14,929 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1122 transitions. Word has length 94 [2022-12-14 05:19:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:19:14,929 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1122 transitions. [2022-12-14 05:19:14,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 05:19:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1122 transitions. [2022-12-14 05:19:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 05:19:14,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:19:14,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:19:14,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 05:19:15,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:19:15,131 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:19:15,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:19:15,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1329327591, now seen corresponding path program 1 times [2022-12-14 05:19:15,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:19:15,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736993152] [2022-12-14 05:19:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:19:15,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:19:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:19:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 05:19:15,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:19:15,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736993152] [2022-12-14 05:19:15,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736993152] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:19:15,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386384818] [2022-12-14 05:19:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:19:15,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:19:15,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:19:15,346 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:19:15,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 05:19:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:19:15,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:19:15,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:19:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:19:15,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:19:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 05:19:15,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386384818] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:19:15,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186886117] [2022-12-14 05:19:15,601 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-12-14 05:19:15,601 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:19:15,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:19:15,601 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:19:15,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:19:18,916 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 05:19:18,937 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 05:19:18,960 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-12-14 05:19:19,024 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-12-14 05:19:19,357 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 05:19:19,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:19:56,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1186886117] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:19:56,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:19:56,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [8, 9, 9] total 58 [2022-12-14 05:19:56,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85590600] [2022-12-14 05:19:56,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:19:56,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 05:19:56,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:19:56,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 05:19:56,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3024, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 05:19:56,340 INFO L87 Difference]: Start difference. First operand 894 states and 1122 transitions. Second operand has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 05:20:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:05,172 INFO L93 Difference]: Finished difference Result 1500 states and 1917 transitions. [2022-12-14 05:20:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 05:20:05,173 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 98 [2022-12-14 05:20:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:05,176 INFO L225 Difference]: With dead ends: 1500 [2022-12-14 05:20:05,176 INFO L226 Difference]: Without dead ends: 916 [2022-12-14 05:20:05,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 17 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 05:20:05,177 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 153 mSDsluCounter, 4390 mSDsCounter, 0 mSdLazyCounter, 3969 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 4669 SdHoareTripleChecker+Invalid, 4015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:05,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 4669 Invalid, 4015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3969 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-12-14 05:20:05,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-12-14 05:20:05,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 881. [2022-12-14 05:20:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 650 states have (on average 1.2507692307692309) internal successors, (813), 657 states have internal predecessors, (813), 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) [2022-12-14 05:20:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1101 transitions. [2022-12-14 05:20:05,367 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1101 transitions. Word has length 98 [2022-12-14 05:20:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:05,367 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 1101 transitions. [2022-12-14 05:20:05,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 05:20:05,367 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1101 transitions. [2022-12-14 05:20:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 05:20:05,368 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:05,368 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:20:05,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 05:20:05,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 05:20:05,570 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:20:05,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:05,572 INFO L85 PathProgramCache]: Analyzing trace with hash 121559424, now seen corresponding path program 1 times [2022-12-14 05:20:05,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:20:05,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004673615] [2022-12-14 05:20:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:05,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:20:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 05:20:05,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:20:05,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004673615] [2022-12-14 05:20:05,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004673615] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:05,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:20:05,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:20:05,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426443333] [2022-12-14 05:20:05,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:05,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:20:05,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:20:05,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:20:05,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:20:05,696 INFO L87 Difference]: Start difference. First operand 881 states and 1101 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-12-14 05:20:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:05,912 INFO L93 Difference]: Finished difference Result 1466 states and 1864 transitions. [2022-12-14 05:20:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:20:05,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 108 [2022-12-14 05:20:05,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:05,914 INFO L225 Difference]: With dead ends: 1466 [2022-12-14 05:20:05,914 INFO L226 Difference]: Without dead ends: 869 [2022-12-14 05:20:05,915 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 [2022-12-14 05:20:05,916 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 7 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:05,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 607 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:20:05,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-12-14 05:20:06,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 819. [2022-12-14 05:20:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 608 states have (on average 1.21875) internal successors, (741), 615 states have internal predecessors, (741), 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) [2022-12-14 05:20:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1001 transitions. [2022-12-14 05:20:06,095 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1001 transitions. Word has length 108 [2022-12-14 05:20:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:06,096 INFO L495 AbstractCegarLoop]: Abstraction has 819 states and 1001 transitions. [2022-12-14 05:20:06,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-12-14 05:20:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1001 transitions. [2022-12-14 05:20:06,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 05:20:06,097 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:06,097 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:20:06,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 05:20:06,097 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:20:06,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:06,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1923066402, now seen corresponding path program 1 times [2022-12-14 05:20:06,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:20:06,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648318199] [2022-12-14 05:20:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:06,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:20:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:20:06,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:20:06,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648318199] [2022-12-14 05:20:06,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648318199] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:06,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:20:06,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:20:06,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262362362] [2022-12-14 05:20:06,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:06,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:20:06,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:20:06,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:20:06,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:20:06,186 INFO L87 Difference]: Start difference. First operand 819 states and 1001 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 05:20:06,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:20:06,389 INFO L93 Difference]: Finished difference Result 1309 states and 1635 transitions. [2022-12-14 05:20:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:20:06,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 124 [2022-12-14 05:20:06,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:20:06,391 INFO L225 Difference]: With dead ends: 1309 [2022-12-14 05:20:06,391 INFO L226 Difference]: Without dead ends: 807 [2022-12-14 05:20:06,392 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 [2022-12-14 05:20:06,393 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 6 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:20:06,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 598 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:20:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-12-14 05:20:06,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 791. [2022-12-14 05:20:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 588 states have (on average 1.1989795918367347) internal successors, (705), 595 states have internal predecessors, (705), 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) [2022-12-14 05:20:06,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 953 transitions. [2022-12-14 05:20:06,569 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 953 transitions. Word has length 124 [2022-12-14 05:20:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:20:06,569 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 953 transitions. [2022-12-14 05:20:06,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 05:20:06,570 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 953 transitions. [2022-12-14 05:20:06,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 05:20:06,571 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:20:06,571 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:20:06,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 05:20:06,571 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:20:06,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:20:06,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1587852507, now seen corresponding path program 1 times [2022-12-14 05:20:06,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:20:06,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785792182] [2022-12-14 05:20:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:06,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:20:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:20:06,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:20:06,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785792182] [2022-12-14 05:20:06,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785792182] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:20:06,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884432618] [2022-12-14 05:20:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:20:06,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:20:06,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:20:06,783 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:20:06,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 05:20:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:20:06,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:20:06,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:20:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 69 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 05:20:06,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:20:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-12-14 05:20:07,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884432618] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:20:07,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329425302] [2022-12-14 05:20:07,045 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-12-14 05:20:07,045 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:20:07,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:20:07,045 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:20:07,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:20:13,103 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 91 for LOIs [2022-12-14 05:20:13,197 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 05:20:13,213 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 05:20:13,314 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 151 for LOIs [2022-12-14 05:20:13,349 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 195 for LOIs [2022-12-14 05:20:13,753 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 184 for LOIs [2022-12-14 05:20:14,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:21:01,596 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '72326#(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 [2022-12-14 05:21:01,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:21:01,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:21:01,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-12-14 05:21:01,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216549311] [2022-12-14 05:21:01,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:21:01,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 05:21:01,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:21:01,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 05:21:01,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=3961, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 05:21:01,597 INFO L87 Difference]: Start difference. First operand 791 states and 953 transitions. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 05:21:02,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:02,626 INFO L93 Difference]: Finished difference Result 2132 states and 2723 transitions. [2022-12-14 05:21:02,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 05:21:02,627 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) Word has length 134 [2022-12-14 05:21:02,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:02,633 INFO L225 Difference]: With dead ends: 2132 [2022-12-14 05:21:02,633 INFO L226 Difference]: Without dead ends: 1508 [2022-12-14 05:21:02,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 323 SyntacticMatches, 24 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=365, Invalid=4605, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 05:21:02,635 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 520 mSDsluCounter, 2071 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 2345 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:02,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 2345 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:21:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2022-12-14 05:21:02,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1094. [2022-12-14 05:21:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 810 states have (on average 1.1888888888888889) internal successors, (963), 820 states have internal predecessors, (963), 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) [2022-12-14 05:21:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1307 transitions. [2022-12-14 05:21:02,873 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1307 transitions. Word has length 134 [2022-12-14 05:21:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:02,873 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 1307 transitions. [2022-12-14 05:21:02,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 05:21:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1307 transitions. [2022-12-14 05:21:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 05:21:02,874 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:02,874 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:21:02,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 05:21:03,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:21:03,076 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:21:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:03,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1078057621, now seen corresponding path program 1 times [2022-12-14 05:21:03,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:21:03,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053422735] [2022-12-14 05:21:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:03,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:21:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-14 05:21:04,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:21:04,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053422735] [2022-12-14 05:21:04,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053422735] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:21:04,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127637602] [2022-12-14 05:21:04,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:04,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:21:04,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:21:04,787 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:21:04,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:21:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:04,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 05:21:04,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 71 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 05:21:05,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:21:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-12-14 05:21:05,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127637602] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:21:05,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87657120] [2022-12-14 05:21:05,961 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2022-12-14 05:21:05,962 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:21:05,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:21:05,962 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:21:05,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:21:13,262 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 92 for LOIs [2022-12-14 05:21:13,360 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 05:21:13,375 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 05:21:13,461 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 152 for LOIs [2022-12-14 05:21:13,493 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 122 for LOIs [2022-12-14 05:21:13,596 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 197 for LOIs [2022-12-14 05:21:13,996 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:22:13,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '77513#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 05:22:13,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:22:13,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:22:13,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14, 14] total 55 [2022-12-14 05:22:13,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350497942] [2022-12-14 05:22:13,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:22:13,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 05:22:13,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:22:13,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 05:22:13,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=10192, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 05:22:13,744 INFO L87 Difference]: Start difference. First operand 1094 states and 1307 transitions. Second operand has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-12-14 05:22:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:22:19,985 INFO L93 Difference]: Finished difference Result 2915 states and 3868 transitions. [2022-12-14 05:22:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 05:22:19,986 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) Word has length 142 [2022-12-14 05:22:19,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:22:19,992 INFO L225 Difference]: With dead ends: 2915 [2022-12-14 05:22:19,992 INFO L226 Difference]: Without dead ends: 2030 [2022-12-14 05:22:19,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 330 SyntacticMatches, 23 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6281 ImplicationChecksByTransitivity, 62.4s TimeCoverageRelationStatistics Valid=2492, Invalid=16414, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 05:22:19,996 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 833 mSDsluCounter, 13276 mSDsCounter, 0 mSdLazyCounter, 5721 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 13755 SdHoareTripleChecker+Invalid, 5925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 5721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:22:19,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 13755 Invalid, 5925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 5721 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-14 05:22:19,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2022-12-14 05:22:20,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1036. [2022-12-14 05:22:20,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 770 states have (on average 1.2116883116883117) internal successors, (933), 782 states have internal predecessors, (933), 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) [2022-12-14 05:22:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1253 transitions. [2022-12-14 05:22:20,273 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1253 transitions. Word has length 142 [2022-12-14 05:22:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:22:20,273 INFO L495 AbstractCegarLoop]: Abstraction has 1036 states and 1253 transitions. [2022-12-14 05:22:20,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-12-14 05:22:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1253 transitions. [2022-12-14 05:22:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 05:22:20,275 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:22:20,275 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:22:20,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 05:22:20,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:22:20,476 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:22:20,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:22:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash -937290993, now seen corresponding path program 1 times [2022-12-14 05:22:20,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:22:20,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133601887] [2022-12-14 05:22:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:22:20,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:22:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:22:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:22:20,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:22:20,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133601887] [2022-12-14 05:22:20,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133601887] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:22:20,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598584585] [2022-12-14 05:22:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:22:20,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:22:20,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:22:20,642 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:22:20,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 05:22:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:22:20,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 05:22:20,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:22:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 66 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 05:22:21,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:22:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:22:21,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598584585] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:22:21,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1366914136] [2022-12-14 05:22:21,824 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2022-12-14 05:22:21,824 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:22:21,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:22:21,824 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:22:21,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:22:46,194 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 59 for LOIs [2022-12-14 05:22:46,236 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2022-12-14 05:22:46,241 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 131 for LOIs [2022-12-14 05:22:46,456 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 98 for LOIs [2022-12-14 05:22:46,529 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 91 for LOIs [2022-12-14 05:22:46,549 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 91 for LOIs [2022-12-14 05:22:46,570 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:23:33,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83775#(and (<= 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) (<= 0 (+ ~s2p_new~0 1)) (<= 0 ~side2_written~0) (<= ~manual_selection_History_1~0 127) (= ~s1s1~0 0) (<= ~active_side_History_1~0 127) (<= 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)) (<= (+ ~s2s1_new~0 1) 0) (<= ~active_side_History_0~0 2) (= (mod assert_~arg 256) 0) (<= (+ ~nomsg~0 1) 0) (exists ((|v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_449| Int)) (and (<= 0 |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_449|) (= (ite (= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_449| 0) 0 1) |assert_#in~arg|) (<= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_449| 1))) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 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 [2022-12-14 05:23:33,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:23:33,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:23:33,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-12-14 05:23:33,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686772669] [2022-12-14 05:23:33,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:23:33,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 05:23:33,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:23:33,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 05:23:33,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=6625, Unknown=0, NotChecked=0, Total=7482 [2022-12-14 05:23:33,652 INFO L87 Difference]: Start difference. First operand 1036 states and 1253 transitions. Second operand has 21 states, 21 states have (on average 9.333333333333334) internal successors, (196), 21 states have internal predecessors, (196), 9 states have call successors, (46), 5 states have call predecessors, (46), 5 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2022-12-14 05:23:40,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:23:40,443 INFO L93 Difference]: Finished difference Result 3458 states and 4588 transitions. [2022-12-14 05:23:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-14 05:23:40,444 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 9.333333333333334) internal successors, (196), 21 states have internal predecessors, (196), 9 states have call successors, (46), 5 states have call predecessors, (46), 5 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) Word has length 144 [2022-12-14 05:23:40,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:23:40,450 INFO L225 Difference]: With dead ends: 3458 [2022-12-14 05:23:40,450 INFO L226 Difference]: Without dead ends: 2674 [2022-12-14 05:23:40,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 350 SyntacticMatches, 11 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11009 ImplicationChecksByTransitivity, 50.5s TimeCoverageRelationStatistics Valid=2821, Invalid=22301, Unknown=0, NotChecked=0, Total=25122 [2022-12-14 05:23:40,454 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 4453 mSDsluCounter, 2475 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 2150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4453 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 5027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2150 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:23:40,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4453 Valid, 2892 Invalid, 5027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2150 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 05:23:40,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2022-12-14 05:23:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 1600. [2022-12-14 05:23:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1194 states have (on average 1.2110552763819096) internal successors, (1446), 1205 states have internal predecessors, (1446), 243 states have call successors, (243), 162 states have call predecessors, (243), 162 states have return successors, (243), 232 states have call predecessors, (243), 243 states have call successors, (243) [2022-12-14 05:23:40,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 1932 transitions. [2022-12-14 05:23:40,870 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 1932 transitions. Word has length 144 [2022-12-14 05:23:40,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:23:40,870 INFO L495 AbstractCegarLoop]: Abstraction has 1600 states and 1932 transitions. [2022-12-14 05:23:40,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.333333333333334) internal successors, (196), 21 states have internal predecessors, (196), 9 states have call successors, (46), 5 states have call predecessors, (46), 5 states have return successors, (45), 9 states have call predecessors, (45), 9 states have call successors, (45) [2022-12-14 05:23:40,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 1932 transitions. [2022-12-14 05:23:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 05:23:40,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:23:40,872 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:23:40,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 05:23:41,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:23:41,072 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:23:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:23:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1827518720, now seen corresponding path program 1 times [2022-12-14 05:23:41,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:23:41,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755321798] [2022-12-14 05:23:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:23:41,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:23:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:23:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-12-14 05:23:41,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:23:41,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755321798] [2022-12-14 05:23:41,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755321798] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:23:41,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:23:41,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 05:23:41,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499908409] [2022-12-14 05:23:41,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:23:41,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:23:41,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:23:41,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:23:41,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:23:41,167 INFO L87 Difference]: Start difference. First operand 1600 states and 1932 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 05:23:42,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:23:42,988 INFO L93 Difference]: Finished difference Result 5418 states and 7022 transitions. [2022-12-14 05:23:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:23:42,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2022-12-14 05:23:42,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:23:43,001 INFO L225 Difference]: With dead ends: 5418 [2022-12-14 05:23:43,001 INFO L226 Difference]: Without dead ends: 4046 [2022-12-14 05:23:43,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:23:43,003 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 597 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:23:43,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1889 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:23:43,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2022-12-14 05:23:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 2680. [2022-12-14 05:23:43,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 1978 states have (on average 1.204246713852376) internal successors, (2382), 1999 states have internal predecessors, (2382), 429 states have call successors, (429), 272 states have call predecessors, (429), 272 states have return successors, (429), 408 states have call predecessors, (429), 429 states have call successors, (429) [2022-12-14 05:23:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 3240 transitions. [2022-12-14 05:23:43,660 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 3240 transitions. Word has length 145 [2022-12-14 05:23:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:23:43,660 INFO L495 AbstractCegarLoop]: Abstraction has 2680 states and 3240 transitions. [2022-12-14 05:23:43,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 05:23:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 3240 transitions. [2022-12-14 05:23:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 05:23:43,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:23:43,662 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:23:43,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 05:23:43,662 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:23:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:23:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1018003525, now seen corresponding path program 1 times [2022-12-14 05:23:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:23:43,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983556492] [2022-12-14 05:23:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:23:43,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:23:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:23:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:23:44,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:23:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983556492] [2022-12-14 05:23:44,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983556492] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:23:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513534183] [2022-12-14 05:23:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:23:44,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:23:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:23:44,111 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:23:44,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 05:23:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:23:44,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 05:23:44,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:23:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 05:23:44,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:23:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:23:44,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513534183] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:23:44,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1384589842] [2022-12-14 05:23:44,990 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2022-12-14 05:23:44,990 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:23:44,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:23:44,990 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:23:44,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:24:02,170 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 56 for LOIs [2022-12-14 05:24:02,205 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 89 for LOIs [2022-12-14 05:24:02,209 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 132 for LOIs [2022-12-14 05:24:02,418 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 99 for LOIs [2022-12-14 05:24:02,512 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 92 for LOIs [2022-12-14 05:24:02,532 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 88 for LOIs [2022-12-14 05:24:02,550 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:24:38,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '102158#(and (<= 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)) (exists ((|v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_569| Int)) (and (<= 0 |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_569|) (= (ite (= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_569| 0) 0 1) |assert_#in~arg|) (<= |v_ULTIMATE.start_main_~c1~0#1_BEFORE_CALL_569| 1))) (= ~cs1~0 0) (<= 0 (+ ~s2s1_new~0 1)) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (<= 0 (+ ~s2p_new~0 1)) (<= ~manual_selection_History_1~0 127) (= ~s1s1~0 0) (<= ~active_side_History_1~0 127) (<= 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)) (<= (+ ~s2s1_new~0 1) 0) (<= ~active_side_History_0~0 2) (= (mod assert_~arg 256) 0) (<= (+ ~nomsg~0 1) 0) (<= 0 (+ ~side2_written~0 1)) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= ~side1_written~0 1) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 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 [2022-12-14 05:24:38,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:24:38,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:24:38,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 9] total 22 [2022-12-14 05:24:38,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475559641] [2022-12-14 05:24:38,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:24:38,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 05:24:38,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:24:38,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 05:24:38,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=7756, Unknown=0, NotChecked=0, Total=8372 [2022-12-14 05:24:38,788 INFO L87 Difference]: Start difference. First operand 2680 states and 3240 transitions. Second operand has 22 states, 22 states have (on average 8.136363636363637) internal successors, (179), 22 states have internal predecessors, (179), 8 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 8 states have call predecessors, (36), 8 states have call successors, (36) [2022-12-14 05:24:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:24:47,030 INFO L93 Difference]: Finished difference Result 9117 states and 12109 transitions. [2022-12-14 05:24:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 05:24:47,030 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.136363636363637) internal successors, (179), 22 states have internal predecessors, (179), 8 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 8 states have call predecessors, (36), 8 states have call successors, (36) Word has length 147 [2022-12-14 05:24:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:24:47,043 INFO L225 Difference]: With dead ends: 9117 [2022-12-14 05:24:47,043 INFO L226 Difference]: Without dead ends: 6665 [2022-12-14 05:24:47,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8024 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=1420, Invalid=18320, Unknown=0, NotChecked=0, Total=19740 [2022-12-14 05:24:47,047 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 2676 mSDsluCounter, 3153 mSDsCounter, 0 mSdLazyCounter, 4691 mSolverCounterSat, 1264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2676 SdHoareTripleChecker+Valid, 3611 SdHoareTripleChecker+Invalid, 5955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1264 IncrementalHoareTripleChecker+Valid, 4691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:24:47,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2676 Valid, 3611 Invalid, 5955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1264 Valid, 4691 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 05:24:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6665 states. [2022-12-14 05:24:48,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6665 to 4076. [2022-12-14 05:24:48,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4076 states, 3038 states have (on average 1.2146148782093482) internal successors, (3690), 3066 states have internal predecessors, (3690), 627 states have call successors, (627), 410 states have call predecessors, (627), 410 states have return successors, (627), 599 states have call predecessors, (627), 627 states have call successors, (627) [2022-12-14 05:24:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4076 states to 4076 states and 4944 transitions. [2022-12-14 05:24:48,078 INFO L78 Accepts]: Start accepts. Automaton has 4076 states and 4944 transitions. Word has length 147 [2022-12-14 05:24:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:24:48,078 INFO L495 AbstractCegarLoop]: Abstraction has 4076 states and 4944 transitions. [2022-12-14 05:24:48,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.136363636363637) internal successors, (179), 22 states have internal predecessors, (179), 8 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 8 states have call predecessors, (36), 8 states have call successors, (36) [2022-12-14 05:24:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4076 states and 4944 transitions. [2022-12-14 05:24:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 05:24:48,080 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:24:48,080 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, 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] [2022-12-14 05:24:48,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 05:24:48,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 05:24:48,281 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:24:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:24:48,281 INFO L85 PathProgramCache]: Analyzing trace with hash -72278634, now seen corresponding path program 1 times [2022-12-14 05:24:48,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:24:48,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541758979] [2022-12-14 05:24:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:24:48,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:24:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:24:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 05:24:48,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:24:48,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541758979] [2022-12-14 05:24:48,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541758979] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:24:48,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017283563] [2022-12-14 05:24:48,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:24:48,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:24:48,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:24:48,669 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:24:48,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b9daf42-44a0-4553-9bc5-ffbabf06fdca/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 05:24:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:24:48,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 05:24:48,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:24:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 05:24:49,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:24:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 05:24:50,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017283563] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:24:50,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [151233310] [2022-12-14 05:24:50,509 INFO L159 IcfgInterpreter]: Started Sifa with 80 locations of interest [2022-12-14 05:24:50,509 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:24:50,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:24:50,509 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:24:50,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:25:07,735 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 56 for LOIs [2022-12-14 05:25:07,769 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 89 for LOIs [2022-12-14 05:25:07,774 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 117 for LOIs [2022-12-14 05:25:07,854 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 105 for LOIs [2022-12-14 05:25:07,941 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 121 for LOIs [2022-12-14 05:25:07,994 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 88 for LOIs [2022-12-14 05:25:08,013 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:25:44,762 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '120516#(and (<= 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) (<= 0 (+ ~s2p_new~0 1)) (= |assert_#in~arg| 0) (<= ~manual_selection_History_1~0 127) (= ~s1s1~0 0) (<= ~active_side_History_1~0 127) (<= 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)) (<= (+ ~s2s1_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) 0) (<= ~active_side_History_0~0 2) (not (= 2 ~active_side_History_0~0)) (<= (+ ~nomsg~0 1) 0) (<= 0 (+ ~side2_written~0 1)) (= ~s1s2~0 0) (<= 0 (+ ~cs1_new~0 1)) (<= (+ ~cs1_new~0 1) 0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ ~manual_selection_History_1~0 128)) (<= 0 (+ 2 ~active_side_History_2~0)) (<= 0 (+ ~side1_written~0 1)) (<= ~side2_written~0 0) (<= ~side1_written~0 1) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 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 [2022-12-14 05:25:44,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:25:44,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:25:44,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 17] total 32 [2022-12-14 05:25:44,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327289957] [2022-12-14 05:25:44,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:25:44,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 05:25:44,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:25:44,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 05:25:44,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=9343, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 05:25:44,765 INFO L87 Difference]: Start difference. First operand 4076 states and 4944 transitions. Second operand has 32 states, 32 states have (on average 6.59375) internal successors, (211), 31 states have internal predecessors, (211), 11 states have call successors, (52), 5 states have call predecessors, (52), 6 states have return successors, (51), 12 states have call predecessors, (51), 11 states have call successors, (51)