./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/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_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/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_15d3181b-9db6-4121-ac19-37be02afa015/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 0a05a45e59c4449e0f919ee265abbb6a4949f64a9be713d749d79d0baffd63df --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 15:12:55,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:12:55,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:12:55,731 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:12:55,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:12:55,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:12:55,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:12:55,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:12:55,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:12:55,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:12:55,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:12:55,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:12:55,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:12:55,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:12:55,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:12:55,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:12:55,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:12:55,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:12:55,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:12:55,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:12:55,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:12:55,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:12:55,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:12:55,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:12:55,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:12:55,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:12:55,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:12:55,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:12:55,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:12:55,749 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:12:55,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:12:55,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:12:55,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:12:55,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:12:55,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:12:55,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:12:55,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:12:55,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:12:55,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:12:55,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:12:55,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:12:55,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:12:55,767 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:12:55,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:12:55,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:12:55,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:12:55,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:12:55,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:12:55,768 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:12:55,768 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:12:55,768 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:12:55,768 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:12:55,768 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:12:55,769 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:12:55,769 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:12:55,769 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:12:55,769 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:12:55,769 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:12:55,769 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:12:55,769 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:12:55,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:12:55,770 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:12:55,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:12:55,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:12:55,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:12:55,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:12:55,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:12:55,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:12:55,770 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:12:55,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:12:55,771 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:12:55,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:12:55,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:12:55,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:12:55,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:12:55,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:12:55,771 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:12:55,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:12:55,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:12:55,771 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:12:55,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:12:55,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:12:55,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:12:55,772 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_15d3181b-9db6-4121-ac19-37be02afa015/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a05a45e59c4449e0f919ee265abbb6a4949f64a9be713d749d79d0baffd63df [2022-12-14 15:12:55,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:12:55,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:12:55,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:12:55,973 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:12:55,973 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:12:55,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2022-12-14 15:12:58,607 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:12:58,782 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:12:58,783 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2022-12-14 15:12:58,789 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/data/80d857ba4/de9285e5834f429480113e0136dcbd39/FLAG3d99ef061 [2022-12-14 15:12:58,799 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/data/80d857ba4/de9285e5834f429480113e0136dcbd39 [2022-12-14 15:12:58,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:12:58,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:12:58,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:12:58,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:12:58,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:12:58,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:12:58" (1/1) ... [2022-12-14 15:12:58,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bc17d28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:58, skipping insertion in model container [2022-12-14 15:12:58,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:12:58" (1/1) ... [2022-12-14 15:12:58,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:12:58,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:12:58,991 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_15d3181b-9db6-4121-ac19-37be02afa015/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c[14577,14590] [2022-12-14 15:12:58,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:12:59,002 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:12:59,043 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_15d3181b-9db6-4121-ac19-37be02afa015/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c[14577,14590] [2022-12-14 15:12:59,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:12:59,054 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:12:59,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:59 WrapperNode [2022-12-14 15:12:59,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:12:59,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:12:59,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:12:59,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:12:59,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:59" (1/1) ... [2022-12-14 15:12:59,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:59" (1/1) ... [2022-12-14 15:12:59,095 INFO L138 Inliner]: procedures = 32, calls = 47, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 480 [2022-12-14 15:12:59,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:12:59,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:12:59,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:12:59,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:12:59,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:59" (1/1) ... [2022-12-14 15:12:59,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:59" (1/1) ... [2022-12-14 15:12:59,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:59" (1/1) ... [2022-12-14 15:12:59,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:59" (1/1) ... [2022-12-14 15:12:59,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:59" (1/1) ... [2022-12-14 15:12:59,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:59" (1/1) ... [2022-12-14 15:12:59,125 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:59" (1/1) ... [2022-12-14 15:12:59,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:59" (1/1) ... [2022-12-14 15:12:59,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:12:59,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:12:59,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:12:59,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:12:59,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:59" (1/1) ... [2022-12-14 15:12:59,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:12:59,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:12:59,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:12:59,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:12:59,194 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2022-12-14 15:12:59,194 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2022-12-14 15:12:59,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:12:59,194 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2022-12-14 15:12:59,194 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2022-12-14 15:12:59,194 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2022-12-14 15:12:59,194 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2022-12-14 15:12:59,194 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 15:12:59,194 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 15:12:59,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:12:59,195 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2022-12-14 15:12:59,195 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2022-12-14 15:12:59,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:12:59,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:12:59,195 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2022-12-14 15:12:59,195 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2022-12-14 15:12:59,280 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:12:59,282 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:12:59,665 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:12:59,799 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:12:59,800 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 15:12:59,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:12:59 BoogieIcfgContainer [2022-12-14 15:12:59,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:12:59,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:12:59,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:12:59,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:12:59,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:12:58" (1/3) ... [2022-12-14 15:12:59,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eea9e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:12:59, skipping insertion in model container [2022-12-14 15:12:59,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:59" (2/3) ... [2022-12-14 15:12:59,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eea9e5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:12:59, skipping insertion in model container [2022-12-14 15:12:59,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:12:59" (3/3) ... [2022-12-14 15:12:59,809 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.5.ufo.UNBOUNDED.pals.c [2022-12-14 15:12:59,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:12:59,823 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:12:59,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:12:59,866 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;@7decc97f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:12:59,866 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:12:59,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 106 states have internal predecessors, (159), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-12-14 15:12:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 15:12:59,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:12:59,876 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 15:12:59,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:12:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:12:59,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1621037693, now seen corresponding path program 1 times [2022-12-14 15:12:59,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:12:59,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862381857] [2022-12-14 15:12:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:12:59,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:12:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:00,214 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 15:13:00,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:00,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862381857] [2022-12-14 15:13:00,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862381857] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:00,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:13:00,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:13:00,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57997071] [2022-12-14 15:13:00,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:00,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:13:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:00,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:13:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:13:00,253 INFO L87 Difference]: Start difference. First operand has 141 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 106 states have internal predecessors, (159), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 15:13:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:00,349 INFO L93 Difference]: Finished difference Result 282 states and 461 transitions. [2022-12-14 15:13:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:13:00,351 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 15:13:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:00,357 INFO L225 Difference]: With dead ends: 282 [2022-12-14 15:13:00,357 INFO L226 Difference]: Without dead ends: 144 [2022-12-14 15:13:00,360 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 15:13:00,362 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 5 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:00,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 593 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:13:00,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-12-14 15:13:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-12-14 15:13:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.4953271028037383) internal successors, (160), 108 states have internal predecessors, (160), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-12-14 15:13:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 218 transitions. [2022-12-14 15:13:00,399 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 218 transitions. Word has length 19 [2022-12-14 15:13:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:00,400 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 218 transitions. [2022-12-14 15:13:00,400 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 15:13:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 218 transitions. [2022-12-14 15:13:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 15:13:00,401 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:00,401 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 15:13:00,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:13:00,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:00,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:00,402 INFO L85 PathProgramCache]: Analyzing trace with hash 724972981, now seen corresponding path program 1 times [2022-12-14 15:13:00,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:00,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916541428] [2022-12-14 15:13:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:00,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:00,498 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 15:13:00,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:00,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916541428] [2022-12-14 15:13:00,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916541428] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:00,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:13:00,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:13:00,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237177882] [2022-12-14 15:13:00,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:00,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:13:00,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:00,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:13:00,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:13:00,501 INFO L87 Difference]: Start difference. First operand 144 states and 218 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 15:13:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:00,725 INFO L93 Difference]: Finished difference Result 402 states and 621 transitions. [2022-12-14 15:13:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:13:00,726 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 15:13:00,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:00,730 INFO L225 Difference]: With dead ends: 402 [2022-12-14 15:13:00,730 INFO L226 Difference]: Without dead ends: 261 [2022-12-14 15:13:00,731 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 15:13:00,731 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 521 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:00,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 549 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:13:00,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-12-14 15:13:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2022-12-14 15:13:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 131 states have (on average 1.4885496183206106) internal successors, (195), 131 states have internal predecessors, (195), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 15:13:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 255 transitions. [2022-12-14 15:13:00,749 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 255 transitions. Word has length 30 [2022-12-14 15:13:00,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:00,749 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 255 transitions. [2022-12-14 15:13:00,749 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 15:13:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 255 transitions. [2022-12-14 15:13:00,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 15:13:00,750 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:00,750 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 15:13:00,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:13:00,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:00,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:00,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1014640376, now seen corresponding path program 1 times [2022-12-14 15:13:00,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:00,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454527572] [2022-12-14 15:13:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:00,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:00,822 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 15:13:00,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:00,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454527572] [2022-12-14 15:13:00,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454527572] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:00,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:13:00,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:13:00,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042768906] [2022-12-14 15:13:00,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:00,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:13:00,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:00,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:13:00,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:13:00,824 INFO L87 Difference]: Start difference. First operand 170 states and 255 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 15:13:01,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:01,042 INFO L93 Difference]: Finished difference Result 402 states and 619 transitions. [2022-12-14 15:13:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:13:01,043 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 15:13:01,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:01,045 INFO L225 Difference]: With dead ends: 402 [2022-12-14 15:13:01,045 INFO L226 Difference]: Without dead ends: 261 [2022-12-14 15:13:01,046 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 15:13:01,047 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 517 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:01,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 552 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:13:01,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-12-14 15:13:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 170. [2022-12-14 15:13:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 131 states have (on average 1.4809160305343512) internal successors, (194), 131 states have internal predecessors, (194), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 15:13:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 254 transitions. [2022-12-14 15:13:01,074 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 254 transitions. Word has length 31 [2022-12-14 15:13:01,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:01,074 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 254 transitions. [2022-12-14 15:13:01,074 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 15:13:01,074 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 254 transitions. [2022-12-14 15:13:01,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 15:13:01,075 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:01,075 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 15:13:01,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:13:01,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:01,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1175462985, now seen corresponding path program 1 times [2022-12-14 15:13:01,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:01,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898984076] [2022-12-14 15:13:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:01,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:01,201 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 15:13:01,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:01,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898984076] [2022-12-14 15:13:01,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898984076] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:01,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:13:01,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:13:01,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482831303] [2022-12-14 15:13:01,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:01,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:13:01,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:01,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:13:01,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:13:01,203 INFO L87 Difference]: Start difference. First operand 170 states and 254 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 15:13:01,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:01,254 INFO L93 Difference]: Finished difference Result 316 states and 475 transitions. [2022-12-14 15:13:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:13:01,255 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 15:13:01,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:01,257 INFO L225 Difference]: With dead ends: 316 [2022-12-14 15:13:01,257 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 15:13:01,257 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 15:13:01,258 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 6 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:01,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 605 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:13:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 15:13:01,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-12-14 15:13:01,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 135 states have (on average 1.4666666666666666) internal successors, (198), 135 states have internal predecessors, (198), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 15:13:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 258 transitions. [2022-12-14 15:13:01,270 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 258 transitions. Word has length 33 [2022-12-14 15:13:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:01,271 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 258 transitions. [2022-12-14 15:13:01,271 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 15:13:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 258 transitions. [2022-12-14 15:13:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 15:13:01,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:01,272 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 15:13:01,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 15:13:01,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash 417792047, now seen corresponding path program 1 times [2022-12-14 15:13:01,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:01,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296175973] [2022-12-14 15:13:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:01,394 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 15:13:01,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:01,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296175973] [2022-12-14 15:13:01,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296175973] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:01,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:13:01,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:13:01,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439385734] [2022-12-14 15:13:01,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:01,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:13:01,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:01,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:13:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:13:01,396 INFO L87 Difference]: Start difference. First operand 175 states and 258 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 15:13:01,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:01,453 INFO L93 Difference]: Finished difference Result 326 states and 486 transitions. [2022-12-14 15:13:01,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:13:01,453 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 15:13:01,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:01,455 INFO L225 Difference]: With dead ends: 326 [2022-12-14 15:13:01,455 INFO L226 Difference]: Without dead ends: 180 [2022-12-14 15:13:01,455 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 15:13:01,456 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 6 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:01,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 591 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:13:01,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-12-14 15:13:01,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-12-14 15:13:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 139 states have (on average 1.4532374100719425) internal successors, (202), 139 states have internal predecessors, (202), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 15:13:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 262 transitions. [2022-12-14 15:13:01,466 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 262 transitions. Word has length 41 [2022-12-14 15:13:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:01,466 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 262 transitions. [2022-12-14 15:13:01,466 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 15:13:01,467 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 262 transitions. [2022-12-14 15:13:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 15:13:01,467 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:01,468 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 15:13:01,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:13:01,468 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1027267769, now seen corresponding path program 1 times [2022-12-14 15:13:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:01,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369503732] [2022-12-14 15:13:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:01,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:01,565 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 15:13:01,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:01,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369503732] [2022-12-14 15:13:01,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369503732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:01,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:13:01,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:13:01,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47726976] [2022-12-14 15:13:01,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:01,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:13:01,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:01,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:13:01,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:13:01,567 INFO L87 Difference]: Start difference. First operand 180 states and 262 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 15:13:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:01,621 INFO L93 Difference]: Finished difference Result 335 states and 490 transitions. [2022-12-14 15:13:01,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:13:01,622 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 15:13:01,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:01,624 INFO L225 Difference]: With dead ends: 335 [2022-12-14 15:13:01,624 INFO L226 Difference]: Without dead ends: 184 [2022-12-14 15:13:01,624 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 15:13:01,625 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 5 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:01,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 600 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:13:01,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-14 15:13:01,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-12-14 15:13:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 142 states have (on average 1.443661971830986) internal successors, (205), 142 states have internal predecessors, (205), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 15:13:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 265 transitions. [2022-12-14 15:13:01,635 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 265 transitions. Word has length 49 [2022-12-14 15:13:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:01,636 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 265 transitions. [2022-12-14 15:13:01,636 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 15:13:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 265 transitions. [2022-12-14 15:13:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 15:13:01,637 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:01,637 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 15:13:01,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:13:01,637 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:01,637 INFO L85 PathProgramCache]: Analyzing trace with hash -871240224, now seen corresponding path program 1 times [2022-12-14 15:13:01,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:01,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929265494] [2022-12-14 15:13:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:01,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:01,744 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 15:13:01,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:01,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929265494] [2022-12-14 15:13:01,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929265494] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:01,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:13:01,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:13:01,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408180063] [2022-12-14 15:13:01,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:01,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:13:01,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:01,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:13:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:13:01,746 INFO L87 Difference]: Start difference. First operand 184 states and 265 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-14 15:13:01,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:01,800 INFO L93 Difference]: Finished difference Result 344 states and 500 transitions. [2022-12-14 15:13:01,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:13:01,801 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 15:13:01,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:01,802 INFO L225 Difference]: With dead ends: 344 [2022-12-14 15:13:01,802 INFO L226 Difference]: Without dead ends: 189 [2022-12-14 15:13:01,803 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 15:13:01,803 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 6 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:01,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 591 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:13:01,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-12-14 15:13:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-12-14 15:13:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 146 states have (on average 1.4315068493150684) internal successors, (209), 146 states have internal predecessors, (209), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 15:13:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2022-12-14 15:13:01,813 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 49 [2022-12-14 15:13:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:01,813 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2022-12-14 15:13:01,813 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 15:13:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2022-12-14 15:13:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 15:13:01,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:01,814 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 15:13:01,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 15:13:01,814 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:01,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:01,815 INFO L85 PathProgramCache]: Analyzing trace with hash 567535428, now seen corresponding path program 1 times [2022-12-14 15:13:01,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:01,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136132378] [2022-12-14 15:13:01,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:01,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:01,928 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 15:13:01,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:01,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136132378] [2022-12-14 15:13:01,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136132378] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:01,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:13:01,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:13:01,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766240424] [2022-12-14 15:13:01,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:01,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:13:01,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:01,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:13:01,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:13:01,930 INFO L87 Difference]: Start difference. First operand 189 states and 269 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-14 15:13:01,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:01,986 INFO L93 Difference]: Finished difference Result 355 states and 507 transitions. [2022-12-14 15:13:01,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:13:01,987 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 15:13:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:01,988 INFO L225 Difference]: With dead ends: 355 [2022-12-14 15:13:01,988 INFO L226 Difference]: Without dead ends: 195 [2022-12-14 15:13:01,989 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 15:13:01,989 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 7 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:01,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 602 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:13:01,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-12-14 15:13:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-12-14 15:13:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 151 states have (on average 1.4172185430463575) internal successors, (214), 151 states have internal predecessors, (214), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 15:13:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 274 transitions. [2022-12-14 15:13:02,004 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 274 transitions. Word has length 57 [2022-12-14 15:13:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:02,004 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 274 transitions. [2022-12-14 15:13:02,004 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 15:13:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 274 transitions. [2022-12-14 15:13:02,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 15:13:02,005 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:02,005 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 15:13:02,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:13:02,006 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:02,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1583060343, now seen corresponding path program 1 times [2022-12-14 15:13:02,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:02,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890931988] [2022-12-14 15:13:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:02,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:02,279 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 15:13:02,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:02,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890931988] [2022-12-14 15:13:02,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890931988] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:02,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332464721] [2022-12-14 15:13:02,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:02,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:02,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:02,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:02,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:13:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:02,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 15:13:02,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:02,560 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 15:13:02,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:13:02,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332464721] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:02,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:13:02,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-12-14 15:13:02,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153956338] [2022-12-14 15:13:02,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:02,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:13:02,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:02,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:13:02,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 15:13:02,563 INFO L87 Difference]: Start difference. First operand 195 states and 274 transitions. Second operand has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 15:13:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:02,803 INFO L93 Difference]: Finished difference Result 566 states and 787 transitions. [2022-12-14 15:13:02,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 15:13:02,804 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 15:13:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:02,806 INFO L225 Difference]: With dead ends: 566 [2022-12-14 15:13:02,806 INFO L226 Difference]: Without dead ends: 374 [2022-12-14 15:13:02,807 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 15:13:02,807 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 207 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:02,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 1098 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:13:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-12-14 15:13:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 371. [2022-12-14 15:13:02,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 285 states have (on average 1.407017543859649) internal successors, (401), 286 states have internal predecessors, (401), 59 states have call successors, (59), 26 states have call predecessors, (59), 26 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2022-12-14 15:13:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 519 transitions. [2022-12-14 15:13:02,839 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 519 transitions. Word has length 60 [2022-12-14 15:13:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:02,839 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 519 transitions. [2022-12-14 15:13:02,839 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 15:13:02,839 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 519 transitions. [2022-12-14 15:13:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 15:13:02,840 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:02,840 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 15:13:02,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:13:03,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:03,041 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:03,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:03,041 INFO L85 PathProgramCache]: Analyzing trace with hash 82224268, now seen corresponding path program 1 times [2022-12-14 15:13:03,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:03,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712477086] [2022-12-14 15:13:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:03,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:03,292 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 15:13:03,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:03,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712477086] [2022-12-14 15:13:03,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712477086] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:03,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146008659] [2022-12-14 15:13:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:03,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:03,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:03,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:03,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:13:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:03,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:13:03,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:03,652 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 15:13:03,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:13:03,805 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 15:13:03,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146008659] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:13:03,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127949693] [2022-12-14 15:13:03,826 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-12-14 15:13:03,826 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:13:03,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:13:03,832 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:13:03,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:13:06,157 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 15:13:06,179 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 15:13:06,205 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 15:13:06,248 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:13:18,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [127949693] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:18,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:13:18,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-12-14 15:13:18,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619237595] [2022-12-14 15:13:18,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:18,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 15:13:18,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:18,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 15:13:18,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 15:13:18,237 INFO L87 Difference]: Start difference. First operand 371 states and 519 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 15:13:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:22,951 INFO L93 Difference]: Finished difference Result 802 states and 1132 transitions. [2022-12-14 15:13:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 15:13:22,952 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 15:13:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:22,955 INFO L225 Difference]: With dead ends: 802 [2022-12-14 15:13:22,955 INFO L226 Difference]: Without dead ends: 456 [2022-12-14 15:13:22,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 15:13:22,956 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 147 mSDsluCounter, 3027 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 3311 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:22,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 3311 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-12-14 15:13:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-12-14 15:13:22,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 433. [2022-12-14 15:13:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 329 states have (on average 1.3799392097264438) internal successors, (454), 330 states have internal predecessors, (454), 74 states have call successors, (74), 29 states have call predecessors, (74), 29 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2022-12-14 15:13:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 602 transitions. [2022-12-14 15:13:22,999 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 602 transitions. Word has length 62 [2022-12-14 15:13:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:22,999 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 602 transitions. [2022-12-14 15:13:22,999 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 15:13:22,999 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 602 transitions. [2022-12-14 15:13:23,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 15:13:23,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:23,000 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 15:13:23,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:13:23,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 15:13:23,201 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:23,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:23,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1721633405, now seen corresponding path program 1 times [2022-12-14 15:13:23,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:23,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248125548] [2022-12-14 15:13:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:23,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:23,424 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 15:13:23,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248125548] [2022-12-14 15:13:23,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248125548] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495253721] [2022-12-14 15:13:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:23,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:23,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:23,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:23,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:13:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:23,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:13:23,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:23,681 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 15:13:23,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:13:23,772 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 15:13:23,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495253721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:13:23,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1761361193] [2022-12-14 15:13:23,774 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2022-12-14 15:13:23,774 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:13:23,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:13:23,775 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:13:23,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:13:25,331 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 15:13:25,353 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 15:13:25,369 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 15:13:25,417 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:13:37,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1761361193] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:37,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:13:37,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 36 [2022-12-14 15:13:37,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234356113] [2022-12-14 15:13:37,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:37,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 15:13:37,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:37,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 15:13:37,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 15:13:37,429 INFO L87 Difference]: Start difference. First operand 433 states and 602 transitions. Second operand has 25 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 15:13:41,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:13:41,530 INFO L93 Difference]: Finished difference Result 845 states and 1187 transitions. [2022-12-14 15:13:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 15:13:41,531 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 15:13:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:13:41,532 INFO L225 Difference]: With dead ends: 845 [2022-12-14 15:13:41,532 INFO L226 Difference]: Without dead ends: 506 [2022-12-14 15:13:41,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 15:13:41,534 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 60 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 2955 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:13:41,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 2955 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 15:13:41,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-12-14 15:13:41,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 483. [2022-12-14 15:13:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 362 states have (on average 1.3646408839779005) internal successors, (494), 363 states have internal predecessors, (494), 88 states have call successors, (88), 32 states have call predecessors, (88), 32 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2022-12-14 15:13:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 670 transitions. [2022-12-14 15:13:41,604 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 670 transitions. Word has length 62 [2022-12-14 15:13:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:13:41,604 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 670 transitions. [2022-12-14 15:13:41,604 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 15:13:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 670 transitions. [2022-12-14 15:13:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 15:13:41,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:13:41,605 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 15:13:41,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 15:13:41,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 15:13:41,807 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:13:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:13:41,808 INFO L85 PathProgramCache]: Analyzing trace with hash 37343168, now seen corresponding path program 1 times [2022-12-14 15:13:41,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:13:41,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950579284] [2022-12-14 15:13:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:41,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:13:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:42,076 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 15:13:42,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:13:42,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950579284] [2022-12-14 15:13:42,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950579284] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:13:42,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414237993] [2022-12-14 15:13:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:13:42,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:13:42,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:13:42,078 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:13:42,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:13:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:13:42,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:13:42,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:13:42,368 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 15:13:42,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:13:42,449 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 15:13:42,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414237993] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:13:42,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1056761485] [2022-12-14 15:13:42,451 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2022-12-14 15:13:42,451 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:13:42,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:13:42,451 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:13:42,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:13:44,462 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 15:13:44,483 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 15:13:44,499 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 15:13:44,539 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:13:59,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1056761485] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:13:59,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:13:59,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [9, 9, 9] total 38 [2022-12-14 15:13:59,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465566248] [2022-12-14 15:13:59,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:13:59,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 15:13:59,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:13:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 15:13:59,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 15:13:59,663 INFO L87 Difference]: Start difference. First operand 483 states and 670 transitions. Second operand has 27 states, 24 states have (on average 1.875) internal successors, (45), 20 states have internal predecessors, (45), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 15:14:04,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:14:04,793 INFO L93 Difference]: Finished difference Result 895 states and 1258 transitions. [2022-12-14 15:14:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 15:14:04,794 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 15:14:04,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:14:04,796 INFO L225 Difference]: With dead ends: 895 [2022-12-14 15:14:04,796 INFO L226 Difference]: Without dead ends: 556 [2022-12-14 15:14:04,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 15:14:04,797 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 136 mSDsluCounter, 3148 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 3447 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:14:04,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 3447 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-14 15:14:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-12-14 15:14:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 507. [2022-12-14 15:14:04,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 378 states have (on average 1.3465608465608465) internal successors, (509), 379 states have internal predecessors, (509), 94 states have call successors, (94), 34 states have call predecessors, (94), 34 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2022-12-14 15:14:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 697 transitions. [2022-12-14 15:14:04,871 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 697 transitions. Word has length 64 [2022-12-14 15:14:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:14:04,872 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 697 transitions. [2022-12-14 15:14:04,872 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 15:14:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 697 transitions. [2022-12-14 15:14:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 15:14:04,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:14:04,872 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 15:14:04,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:14:05,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:05,074 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:14:05,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:14:05,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2065208325, now seen corresponding path program 1 times [2022-12-14 15:14:05,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:14:05,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720379660] [2022-12-14 15:14:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:05,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:14:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:05,175 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 15:14:05,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:05,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720379660] [2022-12-14 15:14:05,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720379660] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:14:05,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:14:05,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:14:05,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485986673] [2022-12-14 15:14:05,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:14:05,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:14:05,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:14:05,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:14:05,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:14:05,177 INFO L87 Difference]: Start difference. First operand 507 states and 697 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 15:14:05,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:14:05,300 INFO L93 Difference]: Finished difference Result 906 states and 1272 transitions. [2022-12-14 15:14:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:14:05,300 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 15:14:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:14:05,302 INFO L225 Difference]: With dead ends: 906 [2022-12-14 15:14:05,302 INFO L226 Difference]: Without dead ends: 515 [2022-12-14 15:14:05,303 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 15:14:05,304 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 5 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:14:05,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 600 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:14:05,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-12-14 15:14:05,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2022-12-14 15:14:05,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 384 states have (on average 1.3411458333333333) internal successors, (515), 385 states have internal predecessors, (515), 94 states have call successors, (94), 36 states have call predecessors, (94), 36 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2022-12-14 15:14:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 703 transitions. [2022-12-14 15:14:05,393 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 703 transitions. Word has length 66 [2022-12-14 15:14:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:14:05,393 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 703 transitions. [2022-12-14 15:14:05,393 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 15:14:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 703 transitions. [2022-12-14 15:14:05,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 15:14:05,394 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:14:05,394 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 15:14:05,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 15:14:05,394 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:14:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:14:05,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2097352196, now seen corresponding path program 1 times [2022-12-14 15:14:05,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:14:05,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581438191] [2022-12-14 15:14:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:05,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:14:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:05,587 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 15:14:05,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:05,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581438191] [2022-12-14 15:14:05,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581438191] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:14:05,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866133217] [2022-12-14 15:14:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:05,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:05,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:14:05,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:14:05,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:14:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:05,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:14:05,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:14:05,842 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 15:14:05,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:14:05,945 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 15:14:05,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866133217] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:14:05,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1561392661] [2022-12-14 15:14:05,947 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2022-12-14 15:14:05,947 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:14:05,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:14:05,947 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:14:05,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:14:09,260 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 231 for LOIs [2022-12-14 15:14:09,450 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 15:14:09,466 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 182 for LOIs [2022-12-14 15:14:09,582 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 154 for LOIs [2022-12-14 15:14:09,615 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-12-14 15:14:09,657 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 15:14:09,699 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:14:46,169 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15790#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s2p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~s2s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~s1s1_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256)))) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (not (= (mod ~side2Failed~0 256) 0)) (= assert_~arg |assert_#in~arg|) (not (= (mod ~side1Failed_History_1~0 256) 0)) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (<= 0 ~manual_selection_History_2~0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side1_written~0 1) (= ~s1s2~0 0) (= ~nomsg~0 ~s2p_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256))) ~s1s2_old~0) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= ~s1p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 1)) 1 ~nomsg~0) 256) (- 256)))) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~nomsg~0 ~side2_written~0) (<= ~manual_selection_History_2~0 0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (= ~nomsg~0 ~s2s2_new~0) (= (mod ~side1Failed~0 256) 0) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256))) ~s2s1_old~0) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 15:14:46,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:14:46,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:14:46,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-12-14 15:14:46,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496492219] [2022-12-14 15:14:46,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:14:46,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 15:14:46,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:14:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 15:14:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2619, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 15:14:46,171 INFO L87 Difference]: Start difference. First operand 515 states and 703 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-12-14 15:14:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:14:46,717 INFO L93 Difference]: Finished difference Result 1236 states and 1718 transitions. [2022-12-14 15:14:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 15:14:46,718 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 15:14:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:14:46,720 INFO L225 Difference]: With dead ends: 1236 [2022-12-14 15:14:46,720 INFO L226 Difference]: Without dead ends: 853 [2022-12-14 15:14:46,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 150 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=397, Invalid=3143, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 15:14:46,722 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 295 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:14:46,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 2369 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:14:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-12-14 15:14:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 532. [2022-12-14 15:14:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 394 states have (on average 1.2944162436548223) internal successors, (510), 396 states have internal predecessors, (510), 92 states have call successors, (92), 45 states have call predecessors, (92), 45 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2022-12-14 15:14:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 694 transitions. [2022-12-14 15:14:46,813 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 694 transitions. Word has length 70 [2022-12-14 15:14:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:14:46,813 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 694 transitions. [2022-12-14 15:14:46,813 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 15:14:46,813 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 694 transitions. [2022-12-14 15:14:46,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 15:14:46,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:14:46,814 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 15:14:46,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:14:47,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:47,016 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:14:47,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:14:47,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1770630772, now seen corresponding path program 1 times [2022-12-14 15:14:47,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:14:47,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659868915] [2022-12-14 15:14:47,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:47,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:14:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:47,218 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 15:14:47,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:47,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659868915] [2022-12-14 15:14:47,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659868915] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:14:47,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:14:47,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:14:47,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404749629] [2022-12-14 15:14:47,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:14:47,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:14:47,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:14:47,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:14:47,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:14:47,220 INFO L87 Difference]: Start difference. First operand 532 states and 694 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 15:14:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:14:47,929 INFO L93 Difference]: Finished difference Result 1170 states and 1609 transitions. [2022-12-14 15:14:47,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:14:47,930 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 15:14:47,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:14:47,933 INFO L225 Difference]: With dead ends: 1170 [2022-12-14 15:14:47,933 INFO L226 Difference]: Without dead ends: 876 [2022-12-14 15:14:47,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:14:47,934 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 515 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:14:47,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 2248 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:14:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-12-14 15:14:48,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 671. [2022-12-14 15:14:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 496 states have (on average 1.3064516129032258) internal successors, (648), 499 states have internal predecessors, (648), 116 states have call successors, (116), 58 states have call predecessors, (116), 58 states have return successors, (116), 113 states have call predecessors, (116), 116 states have call successors, (116) [2022-12-14 15:14:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 880 transitions. [2022-12-14 15:14:48,089 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 880 transitions. Word has length 71 [2022-12-14 15:14:48,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:14:48,089 INFO L495 AbstractCegarLoop]: Abstraction has 671 states and 880 transitions. [2022-12-14 15:14:48,089 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 15:14:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 880 transitions. [2022-12-14 15:14:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 15:14:48,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:14:48,090 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 15:14:48,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 15:14:48,091 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:14:48,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:14:48,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1967961618, now seen corresponding path program 1 times [2022-12-14 15:14:48,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:14:48,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516357583] [2022-12-14 15:14:48,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:48,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:14:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:48,296 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 15:14:48,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:48,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516357583] [2022-12-14 15:14:48,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516357583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:14:48,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:14:48,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:14:48,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028091863] [2022-12-14 15:14:48,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:14:48,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:14:48,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:14:48,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:14:48,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:14:48,298 INFO L87 Difference]: Start difference. First operand 671 states and 880 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 15:14:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:14:48,977 INFO L93 Difference]: Finished difference Result 1540 states and 2122 transitions. [2022-12-14 15:14:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 15:14:48,978 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 15:14:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:14:48,981 INFO L225 Difference]: With dead ends: 1540 [2022-12-14 15:14:48,981 INFO L226 Difference]: Without dead ends: 1211 [2022-12-14 15:14:48,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 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 15:14:48,982 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 733 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:14:48,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 1389 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:14:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-12-14 15:14:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 927. [2022-12-14 15:14:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 679 states have (on average 1.3136966126656848) internal successors, (892), 684 states have internal predecessors, (892), 165 states have call successors, (165), 82 states have call predecessors, (165), 82 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) [2022-12-14 15:14:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1222 transitions. [2022-12-14 15:14:49,144 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1222 transitions. Word has length 73 [2022-12-14 15:14:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:14:49,145 INFO L495 AbstractCegarLoop]: Abstraction has 927 states and 1222 transitions. [2022-12-14 15:14:49,145 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 15:14:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1222 transitions. [2022-12-14 15:14:49,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 15:14:49,146 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:14:49,146 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 15:14:49,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 15:14:49,147 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:14:49,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:14:49,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1644453955, now seen corresponding path program 1 times [2022-12-14 15:14:49,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:14:49,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625941721] [2022-12-14 15:14:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:49,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:14:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:49,348 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 15:14:49,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:49,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625941721] [2022-12-14 15:14:49,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625941721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:14:49,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035176476] [2022-12-14 15:14:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:49,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:49,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:14:49,350 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:14:49,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:14:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:49,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 15:14:49,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:14:49,532 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 15:14:49,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:14:49,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035176476] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:14:49,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:14:49,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 15:14:49,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151733049] [2022-12-14 15:14:49,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:14:49,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:14:49,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:14:49,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:14:49,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:14:49,534 INFO L87 Difference]: Start difference. First operand 927 states and 1222 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:14:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:14:50,033 INFO L93 Difference]: Finished difference Result 1783 states and 2415 transitions. [2022-12-14 15:14:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:14:50,033 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 15:14:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:14:50,036 INFO L225 Difference]: With dead ends: 1783 [2022-12-14 15:14:50,036 INFO L226 Difference]: Without dead ends: 1090 [2022-12-14 15:14:50,037 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 15:14:50,038 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 485 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:14:50,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1561 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:14:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-12-14 15:14:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 927. [2022-12-14 15:14:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 679 states have (on average 1.3078055964653903) internal successors, (888), 684 states have internal predecessors, (888), 165 states have call successors, (165), 82 states have call predecessors, (165), 82 states have return successors, (165), 160 states have call predecessors, (165), 165 states have call successors, (165) [2022-12-14 15:14:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1218 transitions. [2022-12-14 15:14:50,211 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1218 transitions. Word has length 77 [2022-12-14 15:14:50,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:14:50,211 INFO L495 AbstractCegarLoop]: Abstraction has 927 states and 1218 transitions. [2022-12-14 15:14:50,211 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 15:14:50,211 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1218 transitions. [2022-12-14 15:14:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 15:14:50,212 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:14:50,212 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 15:14:50,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:14:50,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 15:14:50,413 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:14:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:14:50,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1640007252, now seen corresponding path program 1 times [2022-12-14 15:14:50,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:14:50,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887599786] [2022-12-14 15:14:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:50,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:14:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:50,613 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 15:14:50,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:14:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887599786] [2022-12-14 15:14:50,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887599786] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:14:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074311766] [2022-12-14 15:14:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:14:50,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:14:50,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:14:50,614 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:14:50,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:14:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:14:50,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:14:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:14:50,785 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 15:14:50,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:14:50,881 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 15:14:50,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074311766] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:14:50,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [8768788] [2022-12-14 15:14:50,884 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-12-14 15:14:50,884 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:14:50,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:14:50,884 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:14:50,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:14:53,741 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 15:14:53,761 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 15:14:53,783 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 15:14:53,875 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 15:14:53,927 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:15:16,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [8768788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:15:16,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:15:16,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [8, 9, 9] total 47 [2022-12-14 15:15:16,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685660318] [2022-12-14 15:15:16,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:15:16,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 15:15:16,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:15:16,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 15:15:16,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 15:15:16,136 INFO L87 Difference]: Start difference. First operand 927 states and 1218 transitions. Second operand has 36 states, 32 states have (on average 1.5) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 15:15:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:15:21,344 INFO L93 Difference]: Finished difference Result 1489 states and 1977 transitions. [2022-12-14 15:15:21,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 15:15:21,345 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 15:15:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:15:21,347 INFO L225 Difference]: With dead ends: 1489 [2022-12-14 15:15:21,347 INFO L226 Difference]: Without dead ends: 913 [2022-12-14 15:15:21,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 15:15:21,349 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 134 mSDsluCounter, 2799 mSDsCounter, 0 mSdLazyCounter, 2415 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 3013 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:15:21,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 3013 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2415 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-12-14 15:15:21,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-12-14 15:15:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 913. [2022-12-14 15:15:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 669 states have (on average 1.3064275037369208) internal successors, (874), 674 states have internal predecessors, (874), 162 states have call successors, (162), 81 states have call predecessors, (162), 81 states have return successors, (162), 157 states have call predecessors, (162), 162 states have call successors, (162) [2022-12-14 15:15:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1198 transitions. [2022-12-14 15:15:21,510 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1198 transitions. Word has length 77 [2022-12-14 15:15:21,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:15:21,510 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1198 transitions. [2022-12-14 15:15:21,510 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 15:15:21,510 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1198 transitions. [2022-12-14 15:15:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 15:15:21,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:15:21,511 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 15:15:21,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:15:21,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 15:15:21,712 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:15:21,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:15:21,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2016603018, now seen corresponding path program 1 times [2022-12-14 15:15:21,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:15:21,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453654794] [2022-12-14 15:15:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:21,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:15:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:15:21,827 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 15:15:21,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:15:21,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453654794] [2022-12-14 15:15:21,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453654794] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:15:21,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:15:21,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:15:21,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221715352] [2022-12-14 15:15:21,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:15:21,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:15:21,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:15:21,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:15:21,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:15:21,829 INFO L87 Difference]: Start difference. First operand 913 states and 1198 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 15:15:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:15:22,116 INFO L93 Difference]: Finished difference Result 1201 states and 1645 transitions. [2022-12-14 15:15:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:15:22,117 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 15:15:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:15:22,120 INFO L225 Difference]: With dead ends: 1201 [2022-12-14 15:15:22,120 INFO L226 Difference]: Without dead ends: 1199 [2022-12-14 15:15:22,120 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 15:15:22,120 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 155 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:15:22,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1465 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:15:22,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-12-14 15:15:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 914. [2022-12-14 15:15:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 668 states have (on average 1.3068862275449102) internal successors, (873), 674 states have internal predecessors, (873), 163 states have call successors, (163), 82 states have call predecessors, (163), 82 states have return successors, (163), 157 states have call predecessors, (163), 163 states have call successors, (163) [2022-12-14 15:15:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1199 transitions. [2022-12-14 15:15:22,284 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1199 transitions. Word has length 80 [2022-12-14 15:15:22,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:15:22,284 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1199 transitions. [2022-12-14 15:15:22,285 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 15:15:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1199 transitions. [2022-12-14 15:15:22,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 15:15:22,285 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:15:22,285 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 15:15:22,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 15:15:22,286 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:15:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:15:22,286 INFO L85 PathProgramCache]: Analyzing trace with hash 464073779, now seen corresponding path program 1 times [2022-12-14 15:15:22,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:15:22,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80726721] [2022-12-14 15:15:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:22,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:15:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:15:22,376 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 15:15:22,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:15:22,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80726721] [2022-12-14 15:15:22,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80726721] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:15:22,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:15:22,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:15:22,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331945850] [2022-12-14 15:15:22,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:15:22,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:15:22,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:15:22,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:15:22,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:15:22,378 INFO L87 Difference]: Start difference. First operand 914 states and 1199 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 15:15:22,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:15:22,611 INFO L93 Difference]: Finished difference Result 1566 states and 2070 transitions. [2022-12-14 15:15:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:15:22,612 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 15:15:22,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:15:22,614 INFO L225 Difference]: With dead ends: 1566 [2022-12-14 15:15:22,614 INFO L226 Difference]: Without dead ends: 902 [2022-12-14 15:15:22,615 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 15:15:22,615 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 7 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:15:22,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 592 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:15:22,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-12-14 15:15:22,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 902. [2022-12-14 15:15:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 662 states have (on average 1.2824773413897281) internal successors, (849), 668 states have internal predecessors, (849), 157 states have call successors, (157), 82 states have call predecessors, (157), 82 states have return successors, (157), 151 states have call predecessors, (157), 157 states have call successors, (157) [2022-12-14 15:15:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1163 transitions. [2022-12-14 15:15:22,862 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1163 transitions. Word has length 83 [2022-12-14 15:15:22,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:15:22,862 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 1163 transitions. [2022-12-14 15:15:22,862 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 15:15:22,862 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1163 transitions. [2022-12-14 15:15:22,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 15:15:22,863 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:15:22,863 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 15:15:22,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 15:15:22,863 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:15:22,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:15:22,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1041283411, now seen corresponding path program 1 times [2022-12-14 15:15:22,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:15:22,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454577560] [2022-12-14 15:15:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:22,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:15:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:15:23,047 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 15:15:23,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:15:23,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454577560] [2022-12-14 15:15:23,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454577560] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:15:23,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558654551] [2022-12-14 15:15:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:15:23,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:15:23,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:15:23,048 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:15:23,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:15:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:15:23,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:15:23,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:15:23,216 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 15:15:23,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:15:23,319 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 15:15:23,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558654551] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:15:23,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1701822097] [2022-12-14 15:15:23,321 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-12-14 15:15:23,322 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:15:23,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:15:23,322 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:15:23,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:15:26,508 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 15:15:26,530 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 15:15:26,546 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-12-14 15:15:26,630 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 152 for LOIs [2022-12-14 15:15:26,673 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 15:15:26,720 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:15:55,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1701822097] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:15:55,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:15:55,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [8, 9, 9] total 53 [2022-12-14 15:15:55,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262215715] [2022-12-14 15:15:55,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:15:55,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 15:15:55,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:15:55,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 15:15:55,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 15:15:55,206 INFO L87 Difference]: Start difference. First operand 902 states and 1163 transitions. Second operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 29 states have internal predecessors, (50), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 15:16:03,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:03,314 INFO L93 Difference]: Finished difference Result 1515 states and 1985 transitions. [2022-12-14 15:16:03,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 15:16:03,315 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 15:16:03,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:03,319 INFO L225 Difference]: With dead ends: 1515 [2022-12-14 15:16:03,319 INFO L226 Difference]: Without dead ends: 944 [2022-12-14 15:16:03,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 200 SyntacticMatches, 13 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=258, Invalid=2604, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 15:16:03,321 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 217 mSDsluCounter, 4256 mSDsCounter, 0 mSdLazyCounter, 3768 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 4520 SdHoareTripleChecker+Invalid, 3827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:03,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 4520 Invalid, 3827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3768 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-12-14 15:16:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-12-14 15:16:03,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 905. [2022-12-14 15:16:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 664 states have (on average 1.2816265060240963) internal successors, (851), 670 states have internal predecessors, (851), 158 states have call successors, (158), 82 states have call predecessors, (158), 82 states have return successors, (158), 152 states have call predecessors, (158), 158 states have call successors, (158) [2022-12-14 15:16:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1167 transitions. [2022-12-14 15:16:03,495 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1167 transitions. Word has length 85 [2022-12-14 15:16:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:03,495 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 1167 transitions. [2022-12-14 15:16:03,495 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 15:16:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1167 transitions. [2022-12-14 15:16:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 15:16:03,496 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:03,496 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 15:16:03,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:16:03,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 15:16:03,698 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:03,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:03,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1329144526, now seen corresponding path program 1 times [2022-12-14 15:16:03,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:03,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008284826] [2022-12-14 15:16:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:03,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:03,925 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 15:16:03,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:03,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008284826] [2022-12-14 15:16:03,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008284826] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:03,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620007258] [2022-12-14 15:16:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:03,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:16:03,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:16:03,926 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:16:03,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:16:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:03,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 15:16:03,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:04,161 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 15:16:04,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:16:04,257 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 15:16:04,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620007258] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:16:04,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [930485368] [2022-12-14 15:16:04,259 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2022-12-14 15:16:04,259 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:16:04,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:16:04,259 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:16:04,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:16:07,795 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 241 for LOIs [2022-12-14 15:16:08,011 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 15:16:08,027 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 123 for LOIs [2022-12-14 15:16:08,114 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 157 for LOIs [2022-12-14 15:16:08,146 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-12-14 15:16:08,188 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 15:16:08,230 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:16:47,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41524#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (not (= (mod ~side1Failed_History_0~0 256) 0)) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2p_old~0) (<= 0 ~manual_selection_History_2~0) (= ~side2_written~0 0) (not (= (mod ~side2Failed_History_1~0 256) 0)) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (<= ~manual_selection_History_2~0 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256)))) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (= (mod ~side1Failed_History_1~0 256) 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 15:16:47,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:16:47,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:16:47,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-12-14 15:16:47,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948533748] [2022-12-14 15:16:47,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:16:47,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 15:16:47,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:16:47,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 15:16:47,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=3149, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 15:16:47,254 INFO L87 Difference]: Start difference. First operand 905 states and 1167 transitions. Second operand has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-12-14 15:16:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:16:48,043 INFO L93 Difference]: Finished difference Result 1858 states and 2462 transitions. [2022-12-14 15:16:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 15:16:48,044 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 85 [2022-12-14 15:16:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:16:48,047 INFO L225 Difference]: With dead ends: 1858 [2022-12-14 15:16:48,047 INFO L226 Difference]: Without dead ends: 1131 [2022-12-14 15:16:48,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 189 SyntacticMatches, 15 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=439, Invalid=3721, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 15:16:48,048 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 217 mSDsluCounter, 2799 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 3107 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:16:48,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 3107 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:16:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-12-14 15:16:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 884. [2022-12-14 15:16:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 649 states have (on average 1.2742681047765794) internal successors, (827), 655 states have internal predecessors, (827), 152 states have call successors, (152), 82 states have call predecessors, (152), 82 states have return successors, (152), 146 states have call predecessors, (152), 152 states have call successors, (152) [2022-12-14 15:16:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1131 transitions. [2022-12-14 15:16:48,213 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1131 transitions. Word has length 85 [2022-12-14 15:16:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:16:48,213 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1131 transitions. [2022-12-14 15:16:48,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 8.333333333333334) internal successors, (75), 12 states have internal predecessors, (75), 4 states have call successors, (21), 3 states have call predecessors, (21), 8 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-12-14 15:16:48,213 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1131 transitions. [2022-12-14 15:16:48,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 15:16:48,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:16:48,214 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 15:16:48,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 15:16:48,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:16:48,416 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:16:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:16:48,417 INFO L85 PathProgramCache]: Analyzing trace with hash -359874311, now seen corresponding path program 1 times [2022-12-14 15:16:48,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:16:48,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072677833] [2022-12-14 15:16:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:48,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:16:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:48,616 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 15:16:48,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:16:48,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072677833] [2022-12-14 15:16:48,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072677833] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:16:48,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241058968] [2022-12-14 15:16:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:16:48,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:16:48,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:16:48,617 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:16:48,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:16:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:16:48,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:16:48,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:16:48,782 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 15:16:48,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:16:48,877 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 15:16:48,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241058968] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:16:48,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [135219676] [2022-12-14 15:16:48,878 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 15:16:48,879 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:16:48,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:16:48,879 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:16:48,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:16:51,853 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 15:16:51,888 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 15:16:51,918 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-12-14 15:16:51,991 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 151 for LOIs [2022-12-14 15:16:52,032 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 15:16:52,072 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:17:24,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [135219676] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:17:24,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:17:24,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [8, 9, 9] total 55 [2022-12-14 15:17:24,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955188755] [2022-12-14 15:17:24,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:17:24,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 15:17:24,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:17:24,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 15:17:24,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2722, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 15:17:24,224 INFO L87 Difference]: Start difference. First operand 884 states and 1131 transitions. Second operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 31 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 15:17:33,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:17:33,230 INFO L93 Difference]: Finished difference Result 1479 states and 1926 transitions. [2022-12-14 15:17:33,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 15:17:33,231 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 15:17:33,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:17:33,233 INFO L225 Difference]: With dead ends: 1479 [2022-12-14 15:17:33,233 INFO L226 Difference]: Without dead ends: 919 [2022-12-14 15:17:33,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 203 SyntacticMatches, 14 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=265, Invalid=2927, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 15:17:33,234 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 138 mSDsluCounter, 4705 mSDsCounter, 0 mSdLazyCounter, 3694 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 4999 SdHoareTripleChecker+Invalid, 3740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:17:33,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 4999 Invalid, 3740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3694 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-12-14 15:17:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-12-14 15:17:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 887. [2022-12-14 15:17:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 651 states have (on average 1.273425499231951) internal successors, (829), 657 states have internal predecessors, (829), 153 states have call successors, (153), 82 states have call predecessors, (153), 82 states have return successors, (153), 147 states have call predecessors, (153), 153 states have call successors, (153) [2022-12-14 15:17:33,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1135 transitions. [2022-12-14 15:17:33,406 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1135 transitions. Word has length 87 [2022-12-14 15:17:33,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:17:33,406 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1135 transitions. [2022-12-14 15:17:33,407 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 15:17:33,407 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1135 transitions. [2022-12-14 15:17:33,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 15:17:33,410 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:17:33,410 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 15:17:33,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 15:17:33,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:33,611 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:17:33,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:17:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash -321220305, now seen corresponding path program 1 times [2022-12-14 15:17:33,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:17:33,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573295331] [2022-12-14 15:17:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:33,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:17:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:33,838 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 15:17:33,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:17:33,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573295331] [2022-12-14 15:17:33,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573295331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:17:33,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209825284] [2022-12-14 15:17:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:17:33,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:17:33,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:17:33,840 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:17:33,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:17:33,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:17:33,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:17:33,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:17:34,032 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 15:17:34,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:17:34,137 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 15:17:34,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209825284] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:17:34,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [826306580] [2022-12-14 15:17:34,139 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 15:17:34,140 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:17:34,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:17:34,140 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:17:34,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:17:37,221 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 123 for LOIs [2022-12-14 15:17:37,242 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 15:17:37,258 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 122 for LOIs [2022-12-14 15:17:37,353 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 202 for LOIs [2022-12-14 15:17:37,703 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 15:17:37,748 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:18:11,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [826306580] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:18:11,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:18:11,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-12-14 15:18:11,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046770335] [2022-12-14 15:18:11,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:18:11,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 15:18:11,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:18:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 15:18:11,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 15:18:11,522 INFO L87 Difference]: Start difference. First operand 887 states and 1135 transitions. Second operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 31 states have internal predecessors, (53), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 15:18:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:18:19,340 INFO L93 Difference]: Finished difference Result 1469 states and 1909 transitions. [2022-12-14 15:18:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 15:18:19,341 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 15:18:19,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:18:19,343 INFO L225 Difference]: With dead ends: 1469 [2022-12-14 15:18:19,343 INFO L226 Difference]: Without dead ends: 909 [2022-12-14 15:18:19,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 221 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=292, Invalid=2900, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 15:18:19,344 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 130 mSDsluCounter, 3729 mSDsCounter, 0 mSdLazyCounter, 3488 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 3967 SdHoareTripleChecker+Invalid, 3528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:18:19,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 3967 Invalid, 3528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3488 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-12-14 15:18:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-12-14 15:18:19,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 874. [2022-12-14 15:18:19,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 642 states have (on average 1.2710280373831775) internal successors, (816), 648 states have internal predecessors, (816), 149 states have call successors, (149), 82 states have call predecessors, (149), 82 states have return successors, (149), 143 states have call predecessors, (149), 149 states have call successors, (149) [2022-12-14 15:18:19,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1114 transitions. [2022-12-14 15:18:19,515 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1114 transitions. Word has length 92 [2022-12-14 15:18:19,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:18:19,515 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1114 transitions. [2022-12-14 15:18:19,515 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 15:18:19,516 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1114 transitions. [2022-12-14 15:18:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 15:18:19,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:18:19,516 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 15:18:19,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:18:19,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:19,717 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:18:19,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:18:19,717 INFO L85 PathProgramCache]: Analyzing trace with hash 489716455, now seen corresponding path program 1 times [2022-12-14 15:18:19,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:18:19,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900570777] [2022-12-14 15:18:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:19,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:18:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:19,806 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 15:18:19,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:18:19,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900570777] [2022-12-14 15:18:19,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900570777] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:18:19,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:18:19,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:18:19,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853988581] [2022-12-14 15:18:19,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:18:19,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:18:19,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:18:19,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:18:19,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:18:19,808 INFO L87 Difference]: Start difference. First operand 874 states and 1114 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-12-14 15:18:20,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:18:20,055 INFO L93 Difference]: Finished difference Result 1487 states and 1919 transitions. [2022-12-14 15:18:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:18:20,055 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 15:18:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:18:20,057 INFO L225 Difference]: With dead ends: 1487 [2022-12-14 15:18:20,057 INFO L226 Difference]: Without dead ends: 862 [2022-12-14 15:18:20,058 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 15:18:20,058 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 7 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:18:20,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 574 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:18:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-12-14 15:18:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2022-12-14 15:18:20,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 636 states have (on average 1.2452830188679245) internal successors, (792), 642 states have internal predecessors, (792), 143 states have call successors, (143), 82 states have call predecessors, (143), 82 states have return successors, (143), 137 states have call predecessors, (143), 143 states have call successors, (143) [2022-12-14 15:18:20,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1078 transitions. [2022-12-14 15:18:20,232 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1078 transitions. Word has length 92 [2022-12-14 15:18:20,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:18:20,232 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1078 transitions. [2022-12-14 15:18:20,233 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 15:18:20,233 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1078 transitions. [2022-12-14 15:18:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 15:18:20,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:18:20,234 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 15:18:20,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 15:18:20,234 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:18:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:18:20,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1876502883, now seen corresponding path program 1 times [2022-12-14 15:18:20,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:18:20,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039309562] [2022-12-14 15:18:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:20,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:18:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:20,422 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 15:18:20,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:18:20,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039309562] [2022-12-14 15:18:20,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039309562] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:18:20,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950868873] [2022-12-14 15:18:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:20,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:20,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:18:20,423 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:18:20,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:18:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:20,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:18:20,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:18:20,585 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 15:18:20,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:18:20,670 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 15:18:20,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950868873] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:18:20,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101863530] [2022-12-14 15:18:20,671 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-12-14 15:18:20,671 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:18:20,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:18:20,671 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:18:20,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:18:23,407 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 15:18:23,430 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 15:18:23,446 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 198 for LOIs [2022-12-14 15:18:23,768 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 193 for LOIs [2022-12-14 15:18:24,094 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 15:18:24,138 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:18:59,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [101863530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:18:59,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:18:59,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [8, 9, 9] total 56 [2022-12-14 15:18:59,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390813309] [2022-12-14 15:18:59,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:18:59,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 15:18:59,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:18:59,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 15:18:59,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2830, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 15:18:59,972 INFO L87 Difference]: Start difference. First operand 862 states and 1078 transitions. Second operand has 45 states, 40 states have (on average 1.375) internal successors, (55), 32 states have internal predecessors, (55), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-14 15:19:09,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:19:09,119 INFO L93 Difference]: Finished difference Result 1449 states and 1849 transitions. [2022-12-14 15:19:09,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 15:19:09,120 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 15:19:09,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:19:09,122 INFO L225 Difference]: With dead ends: 1449 [2022-12-14 15:19:09,122 INFO L226 Difference]: Without dead ends: 894 [2022-12-14 15:19:09,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 225 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=258, Invalid=2934, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 15:19:09,123 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 112 mSDsluCounter, 4888 mSDsCounter, 0 mSdLazyCounter, 4151 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 5172 SdHoareTripleChecker+Invalid, 4180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 4151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:19:09,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 5172 Invalid, 4180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 4151 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-12-14 15:19:09,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-12-14 15:19:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 862. [2022-12-14 15:19:09,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 636 states have (on average 1.2437106918238994) internal successors, (791), 642 states have internal predecessors, (791), 143 states have call successors, (143), 82 states have call predecessors, (143), 82 states have return successors, (143), 137 states have call predecessors, (143), 143 states have call successors, (143) [2022-12-14 15:19:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1077 transitions. [2022-12-14 15:19:09,300 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1077 transitions. Word has length 94 [2022-12-14 15:19:09,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:19:09,300 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1077 transitions. [2022-12-14 15:19:09,300 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 15:19:09,300 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1077 transitions. [2022-12-14 15:19:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 15:19:09,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:19:09,301 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 15:19:09,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 15:19:09,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 15:19:09,503 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:19:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:19:09,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1182437168, now seen corresponding path program 1 times [2022-12-14 15:19:09,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:19:09,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813878256] [2022-12-14 15:19:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:19:09,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:19:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:19:09,734 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 15:19:09,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:19:09,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813878256] [2022-12-14 15:19:09,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813878256] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:19:09,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102476367] [2022-12-14 15:19:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:19:09,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:19:09,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:19:09,735 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:19:09,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:19:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:19:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:19:09,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:19:09,900 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 15:19:09,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:19:09,991 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 15:19:09,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102476367] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:19:09,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501771799] [2022-12-14 15:19:09,993 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-12-14 15:19:09,993 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:19:09,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:19:09,993 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:19:09,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:19:13,324 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 125 for LOIs [2022-12-14 15:19:13,344 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 146 for LOIs [2022-12-14 15:19:13,365 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-12-14 15:19:13,428 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 203 for LOIs [2022-12-14 15:19:13,761 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 147 for LOIs [2022-12-14 15:19:13,801 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:19:50,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1501771799] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:19:50,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:19:50,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [8, 9, 9] total 58 [2022-12-14 15:19:50,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786119416] [2022-12-14 15:19:50,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:19:50,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 15:19:50,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:19:50,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 15:19:50,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=3024, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 15:19:50,031 INFO L87 Difference]: Start difference. First operand 862 states and 1077 transitions. Second operand has 47 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 33 states have internal predecessors, (59), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 15:19:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:19:58,391 INFO L93 Difference]: Finished difference Result 1436 states and 1827 transitions. [2022-12-14 15:19:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 15:19:58,391 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 15:19:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:19:58,393 INFO L225 Difference]: With dead ends: 1436 [2022-12-14 15:19:58,393 INFO L226 Difference]: Without dead ends: 884 [2022-12-14 15:19:58,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 17 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 15:19:58,395 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 201 mSDsluCounter, 4621 mSDsCounter, 0 mSdLazyCounter, 4021 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 4881 SdHoareTripleChecker+Invalid, 4089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 4021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:19:58,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 4881 Invalid, 4089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 4021 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-12-14 15:19:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-12-14 15:19:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 849. [2022-12-14 15:19:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 627 states have (on average 1.240829346092504) internal successors, (778), 633 states have internal predecessors, (778), 139 states have call successors, (139), 82 states have call predecessors, (139), 82 states have return successors, (139), 133 states have call predecessors, (139), 139 states have call successors, (139) [2022-12-14 15:19:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1056 transitions. [2022-12-14 15:19:58,568 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1056 transitions. Word has length 98 [2022-12-14 15:19:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:19:58,568 INFO L495 AbstractCegarLoop]: Abstraction has 849 states and 1056 transitions. [2022-12-14 15:19:58,568 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 15:19:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1056 transitions. [2022-12-14 15:19:58,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 15:19:58,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:19:58,569 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 15:19:58,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 15:19:58,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 15:19:58,771 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:19:58,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:19:58,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1397232506, now seen corresponding path program 1 times [2022-12-14 15:19:58,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:19:58,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065365164] [2022-12-14 15:19:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:19:58,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:19:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:19:58,895 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 15:19:58,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:19:58,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065365164] [2022-12-14 15:19:58,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065365164] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:19:58,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:19:58,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:19:58,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101806970] [2022-12-14 15:19:58,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:19:58,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:19:58,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:19:58,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:19:58,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:19:58,896 INFO L87 Difference]: Start difference. First operand 849 states and 1056 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-12-14 15:19:59,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:19:59,143 INFO L93 Difference]: Finished difference Result 1402 states and 1774 transitions. [2022-12-14 15:19:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:19:59,143 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 15:19:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:19:59,145 INFO L225 Difference]: With dead ends: 1402 [2022-12-14 15:19:59,145 INFO L226 Difference]: Without dead ends: 837 [2022-12-14 15:19:59,146 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 15:19:59,146 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 7 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:19:59,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 562 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:19:59,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-12-14 15:19:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 787. [2022-12-14 15:19:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 585 states have (on average 1.2068376068376068) internal successors, (706), 591 states have internal predecessors, (706), 125 states have call successors, (125), 76 states have call predecessors, (125), 76 states have return successors, (125), 119 states have call predecessors, (125), 125 states have call successors, (125) [2022-12-14 15:19:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 956 transitions. [2022-12-14 15:19:59,307 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 956 transitions. Word has length 108 [2022-12-14 15:19:59,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:19:59,307 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 956 transitions. [2022-12-14 15:19:59,307 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 15:19:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 956 transitions. [2022-12-14 15:19:59,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 15:19:59,308 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:19:59,308 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 15:19:59,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 15:19:59,309 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:19:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:19:59,309 INFO L85 PathProgramCache]: Analyzing trace with hash -620595695, now seen corresponding path program 1 times [2022-12-14 15:19:59,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:19:59,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559807161] [2022-12-14 15:19:59,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:19:59,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:19:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:19:59,394 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 15:19:59,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:19:59,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559807161] [2022-12-14 15:19:59,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559807161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:19:59,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:19:59,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:19:59,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794097370] [2022-12-14 15:19:59,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:19:59,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:19:59,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:19:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:19:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:19:59,396 INFO L87 Difference]: Start difference. First operand 787 states and 956 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 15:19:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:19:59,628 INFO L93 Difference]: Finished difference Result 1245 states and 1545 transitions. [2022-12-14 15:19:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:19:59,628 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 15:19:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:19:59,630 INFO L225 Difference]: With dead ends: 1245 [2022-12-14 15:19:59,630 INFO L226 Difference]: Without dead ends: 775 [2022-12-14 15:19:59,631 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 15:19:59,631 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 6 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:19:59,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 553 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:19:59,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-12-14 15:19:59,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 751. [2022-12-14 15:19:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 559 states have (on average 1.184257602862254) internal successors, (662), 565 states have internal predecessors, (662), 118 states have call successors, (118), 73 states have call predecessors, (118), 73 states have return successors, (118), 112 states have call predecessors, (118), 118 states have call successors, (118) [2022-12-14 15:19:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 898 transitions. [2022-12-14 15:19:59,791 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 898 transitions. Word has length 124 [2022-12-14 15:19:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:19:59,791 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 898 transitions. [2022-12-14 15:19:59,791 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 15:19:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 898 transitions. [2022-12-14 15:19:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 15:19:59,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:19:59,793 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 15:19:59,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 15:19:59,793 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:19:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:19:59,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1816869980, now seen corresponding path program 1 times [2022-12-14 15:19:59,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:19:59,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499916481] [2022-12-14 15:19:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:19:59,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:19:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:19:59,986 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 15:19:59,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:19:59,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499916481] [2022-12-14 15:19:59,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499916481] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:19:59,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336872933] [2022-12-14 15:19:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:19:59,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:19:59,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:19:59,987 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:19:59,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 15:20:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:20:00,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:20:00,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:20:00,148 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 15:20:00,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:20:00,241 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 15:20:00,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336872933] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:20:00,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833521045] [2022-12-14 15:20:00,243 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-12-14 15:20:00,243 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:20:00,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:20:00,244 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:20:00,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:20:06,344 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 91 for LOIs [2022-12-14 15:20:06,436 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 15:20:06,452 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 15:20:06,538 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 151 for LOIs [2022-12-14 15:20:06,569 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 195 for LOIs [2022-12-14 15:20:07,013 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 194 for LOIs [2022-12-14 15:20:07,404 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:20:49,971 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69096#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2p_old~0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 0)) 0 ~nomsg~0) 256)))) (= ~nomsg~0 ~cs2_new~0) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 15:20:49,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:20:49,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:20:49,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-12-14 15:20:49,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911450577] [2022-12-14 15:20:49,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:20:49,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 15:20:49,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:20:49,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 15:20:49,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=3961, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 15:20:49,973 INFO L87 Difference]: Start difference. First operand 751 states and 898 transitions. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 10 states have internal predecessors, (108), 3 states have call successors, (28), 3 states have call predecessors, (28), 7 states have return successors, (30), 6 states have call predecessors, (30), 3 states have call successors, (30) [2022-12-14 15:20:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:20:50,875 INFO L93 Difference]: Finished difference Result 1983 states and 2516 transitions. [2022-12-14 15:20:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 15:20:50,875 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 15:20:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:20:50,878 INFO L225 Difference]: With dead ends: 1983 [2022-12-14 15:20:50,879 INFO L226 Difference]: Without dead ends: 1399 [2022-12-14 15:20:50,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 323 SyntacticMatches, 24 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=365, Invalid=4605, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 15:20:50,880 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 459 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:20:50,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1929 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:20:50,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-12-14 15:20:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1054. [2022-12-14 15:20:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 781 states have (on average 1.17797695262484) internal successors, (920), 790 states have internal predecessors, (920), 166 states have call successors, (166), 106 states have call predecessors, (166), 106 states have return successors, (166), 157 states have call predecessors, (166), 166 states have call successors, (166) [2022-12-14 15:20:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1252 transitions. [2022-12-14 15:20:51,108 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1252 transitions. Word has length 134 [2022-12-14 15:20:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:20:51,108 INFO L495 AbstractCegarLoop]: Abstraction has 1054 states and 1252 transitions. [2022-12-14 15:20:51,108 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 15:20:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1252 transitions. [2022-12-14 15:20:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 15:20:51,109 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:20:51,109 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 15:20:51,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 15:20:51,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:20:51,311 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:20:51,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:20:51,312 INFO L85 PathProgramCache]: Analyzing trace with hash -534785460, now seen corresponding path program 1 times [2022-12-14 15:20:51,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:20:51,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57745276] [2022-12-14 15:20:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:51,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:20:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:20:53,158 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 15:20:53,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:20:53,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57745276] [2022-12-14 15:20:53,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57745276] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:20:53,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661134712] [2022-12-14 15:20:53,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:20:53,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:20:53,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:20:53,160 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:20:53,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 15:20:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:20:53,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 15:20:53,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:20:53,887 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 15:20:53,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:20:54,421 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 15:20:54,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661134712] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:20:54,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522601581] [2022-12-14 15:20:54,423 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2022-12-14 15:20:54,423 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:20:54,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:20:54,424 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:20:54,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:21:01,648 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 92 for LOIs [2022-12-14 15:21:01,740 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 145 for LOIs [2022-12-14 15:21:01,756 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 92 for LOIs [2022-12-14 15:21:01,844 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 152 for LOIs [2022-12-14 15:21:01,876 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 123 for LOIs [2022-12-14 15:21:01,975 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 197 for LOIs [2022-12-14 15:21:02,372 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:22:00,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '74011#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (= ~s1p_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (not (= (mod ~side1Failed~0 256) 0)) (<= 0 (+ 2 ~active_side_History_1~0)) (= ~s1p~0 0) (= ~cs1~0 0) (= ~s2s1~0 0) (<= (+ ~s1p_new~0 1) 0) (= (mod ~side2Failed_History_1~0 256) (mod ~side2Failed_History_2~0 256)) (<= ~manual_selection_History_0~0 127) (= ~manual_selection_History_1~0 0) (= |assert_#in~arg| 0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs2_old~0) (= ~s1s1~0 0) (= ~s1s2_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~s1s1_new~0) (= ~nomsg~0 ~s2s1_new~0) (= assert_~arg |assert_#in~arg|) (= ~s2s2~0 0) (= ~side2Failed~0 ~side2Failed_History_0~0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ 2 ~active_side_History_2~0) 0) (= (mod ~side2Failed_History_1~0 256) 0) (= ~side2_written~0 0) (= ~manual_selection_History_2~0 0) (= ~s1s2~0 0) (= (mod ~side2Failed~0 256) 0) (= ~nomsg~0 ~s2p_new~0) (= ~s2p_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= (+ 2 ~active_side_History_1~0) 0) (= ~side1Failed_History_0~0 ~side1Failed~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (+ (mod (ite (not (= ~nomsg~0 ~manual_selection_History_0~0)) ~manual_selection_History_0~0 ~nomsg~0) 256) (- 256))) ~cs1_old~0) (= |#NULL.offset| 0) (<= 0 (+ 2 ~active_side_History_2~0)) (= ~s1s1_old~0 (ite (<= (mod ~nomsg~0 256) 127) (mod ~nomsg~0 256) (+ (- 256) (mod ~nomsg~0 256)))) (= ~nomsg~0 ~cs1_new~0) (= ~active_side_History_0~0 0) (<= 0 (+ ~side1_written~0 1)) (= ~nomsg~0 ~s2s2_new~0) (= (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256))) ~s2s1_old~0) (= ~nomsg~0 ~cs2_new~0) (= ~s2s2_old~0 (ite (<= (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) 127) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256) (+ (- 256) (mod (ite (not (= ~nomsg~0 ~side2_written~0)) ~side2_written~0 ~nomsg~0) 256)))) (<= 0 (+ ~cs2_new~0 1)) (= ~cs2~0 0) (<= (+ ~side1_written~0 1) 0) (= ~nomsg~0 ~s1s2_new~0) (<= 0 |#StackHeapBarrier|) (= ~s2p~0 0) (<= (+ ~s1s1_new~0 1) 0) (= |#NULL.base| 0))' at error location [2022-12-14 15:22:00,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:22:00,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:22:00,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14, 14] total 55 [2022-12-14 15:22:00,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847764081] [2022-12-14 15:22:00,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:22:00,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 15:22:00,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:22:00,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 15:22:00,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=10192, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 15:22:00,420 INFO L87 Difference]: Start difference. First operand 1054 states and 1252 transitions. Second operand has 55 states, 43 states have (on average 4.3023255813953485) internal successors, (185), 44 states have internal predecessors, (185), 18 states have call successors, (50), 5 states have call predecessors, (50), 17 states have return successors, (49), 24 states have call predecessors, (49), 18 states have call successors, (49) [2022-12-14 15:22:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:22:05,753 INFO L93 Difference]: Finished difference Result 2558 states and 3339 transitions. [2022-12-14 15:22:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 15:22:05,754 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 15:22:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:22:05,758 INFO L225 Difference]: With dead ends: 2558 [2022-12-14 15:22:05,758 INFO L226 Difference]: Without dead ends: 1713 [2022-12-14 15:22:05,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 330 SyntacticMatches, 23 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6281 ImplicationChecksByTransitivity, 60.8s TimeCoverageRelationStatistics Valid=2492, Invalid=16414, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 15:22:05,760 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 785 mSDsluCounter, 12440 mSDsCounter, 0 mSdLazyCounter, 5639 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 12864 SdHoareTripleChecker+Invalid, 5835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 5639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 15:22:05,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 12864 Invalid, 5835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 5639 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 15:22:05,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-12-14 15:22:05,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 981. [2022-12-14 15:22:05,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 732 states have (on average 1.1967213114754098) internal successors, (876), 743 states have internal predecessors, (876), 151 states have call successors, (151), 97 states have call predecessors, (151), 97 states have return successors, (151), 140 states have call predecessors, (151), 151 states have call successors, (151) [2022-12-14 15:22:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1178 transitions. [2022-12-14 15:22:05,980 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1178 transitions. Word has length 142 [2022-12-14 15:22:05,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:22:05,980 INFO L495 AbstractCegarLoop]: Abstraction has 981 states and 1178 transitions. [2022-12-14 15:22:05,980 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 15:22:05,980 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1178 transitions. [2022-12-14 15:22:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 15:22:05,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:22:05,981 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:22:05,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 15:22:06,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:22:06,182 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:22:06,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:22:06,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1968333975, now seen corresponding path program 1 times [2022-12-14 15:22:06,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:22:06,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052897812] [2022-12-14 15:22:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:22:06,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:22:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:22:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 15:22:06,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:22:06,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052897812] [2022-12-14 15:22:06,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052897812] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:22:06,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500270204] [2022-12-14 15:22:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:22:06,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:22:06,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:22:06,350 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:22:06,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 15:22:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:22:06,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 15:22:06,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:22:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 67 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 15:22:06,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:22:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 15:22:07,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500270204] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:22:07,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1219362372] [2022-12-14 15:22:07,197 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-12-14 15:22:07,197 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:22:07,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:22:07,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:22:07,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:22:30,023 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 84 for LOIs [2022-12-14 15:22:30,077 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 15:22:30,082 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 116 for LOIs [2022-12-14 15:22:30,154 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 97 for LOIs [2022-12-14 15:22:30,223 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 90 for LOIs [2022-12-14 15:22:30,242 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 86 for LOIs [2022-12-14 15:22:30,260 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:23:01,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '79666#(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)) (<= ~manual_selection_History_1~0 127) (= ~s1s1~0 0) (<= 0 (+ ~s1s2_new~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (exists ((|v_ULTIMATE.start_check_#res#1_BEFORE_CALL_19| Int)) (and (<= 0 |v_ULTIMATE.start_check_#res#1_BEFORE_CALL_19|) (= (ite (= |v_ULTIMATE.start_check_#res#1_BEFORE_CALL_19| 0) 0 1) |assert_#in~arg|) (<= |v_ULTIMATE.start_check_#res#1_BEFORE_CALL_19| 1))) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~s2s1_new~0 1) 0) (= (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 15:23:01,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:23:01,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:23:01,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2022-12-14 15:23:01,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304082827] [2022-12-14 15:23:01,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:23:01,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 15:23:01,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:23:01,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 15:23:01,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=7029, Unknown=0, NotChecked=0, Total=7832 [2022-12-14 15:23:01,798 INFO L87 Difference]: Start difference. First operand 981 states and 1178 transitions. Second operand has 21 states, 21 states have (on average 9.095238095238095) internal successors, (191), 21 states have internal predecessors, (191), 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 15:23:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:23:05,097 INFO L93 Difference]: Finished difference Result 2533 states and 3365 transitions. [2022-12-14 15:23:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 15:23:05,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 9.095238095238095) internal successors, (191), 21 states have internal predecessors, (191), 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 143 [2022-12-14 15:23:05,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:23:05,102 INFO L225 Difference]: With dead ends: 2533 [2022-12-14 15:23:05,102 INFO L226 Difference]: Without dead ends: 1796 [2022-12-14 15:23:05,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 346 SyntacticMatches, 7 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5504 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=1363, Invalid=12209, Unknown=0, NotChecked=0, Total=13572 [2022-12-14 15:23:05,104 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 3489 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 1571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 3312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1571 IncrementalHoareTripleChecker+Valid, 1741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:23:05,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 1706 Invalid, 3312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1571 Valid, 1741 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 15:23:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2022-12-14 15:23:05,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1051. [2022-12-14 15:23:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 790 states have (on average 1.1949367088607594) internal successors, (944), 798 states have internal predecessors, (944), 156 states have call successors, (156), 104 states have call predecessors, (156), 104 states have return successors, (156), 148 states have call predecessors, (156), 156 states have call successors, (156) [2022-12-14 15:23:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1256 transitions. [2022-12-14 15:23:05,367 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1256 transitions. Word has length 143 [2022-12-14 15:23:05,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:23:05,367 INFO L495 AbstractCegarLoop]: Abstraction has 1051 states and 1256 transitions. [2022-12-14 15:23:05,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.095238095238095) internal successors, (191), 21 states have internal predecessors, (191), 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 15:23:05,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1256 transitions. [2022-12-14 15:23:05,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 15:23:05,369 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:23:05,369 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, 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] [2022-12-14 15:23:05,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 15:23:05,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 15:23:05,569 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:23:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:23:05,570 INFO L85 PathProgramCache]: Analyzing trace with hash 164121695, now seen corresponding path program 1 times [2022-12-14 15:23:05,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:23:05,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931604209] [2022-12-14 15:23:05,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:23:05,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:23:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:23:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 15:23:05,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:23:05,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931604209] [2022-12-14 15:23:05,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931604209] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:23:05,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:23:05,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:23:05,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849821951] [2022-12-14 15:23:05,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:23:05,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:23:05,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:23:05,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:23:05,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:23:05,667 INFO L87 Difference]: Start difference. First operand 1051 states and 1256 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 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 15:23:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:23:06,650 INFO L93 Difference]: Finished difference Result 3225 states and 4160 transitions. [2022-12-14 15:23:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:23:06,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 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 144 [2022-12-14 15:23:06,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:23:06,657 INFO L225 Difference]: With dead ends: 3225 [2022-12-14 15:23:06,657 INFO L226 Difference]: Without dead ends: 2439 [2022-12-14 15:23:06,658 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 15:23:06,658 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 496 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:23:06,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 1803 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:23:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2022-12-14 15:23:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 1727. [2022-12-14 15:23:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1283 states have (on average 1.1964146531566642) internal successors, (1535), 1298 states have internal predecessors, (1535), 271 states have call successors, (271), 172 states have call predecessors, (271), 172 states have return successors, (271), 256 states have call predecessors, (271), 271 states have call successors, (271) [2022-12-14 15:23:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2077 transitions. [2022-12-14 15:23:07,086 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2077 transitions. Word has length 144 [2022-12-14 15:23:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:23:07,087 INFO L495 AbstractCegarLoop]: Abstraction has 1727 states and 2077 transitions. [2022-12-14 15:23:07,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 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 15:23:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2077 transitions. [2022-12-14 15:23:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 15:23:07,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:23:07,088 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, 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] [2022-12-14 15:23:07,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 15:23:07,088 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:23:07,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:23:07,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1692322076, now seen corresponding path program 1 times [2022-12-14 15:23:07,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:23:07,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525001123] [2022-12-14 15:23:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:23:07,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:23:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:23:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 15:23:07,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:23:07,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525001123] [2022-12-14 15:23:07,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525001123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:23:07,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987146235] [2022-12-14 15:23:07,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:23:07,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:23:07,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:23:07,251 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:23:07,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 15:23:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:23:07,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 15:23:07,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:23:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 59 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 15:23:07,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:23:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 15:23:08,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987146235] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:23:08,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1352028924] [2022-12-14 15:23:08,065 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2022-12-14 15:23:08,065 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:23:08,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:23:08,066 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:23:08,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:23:18,073 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 93 for LOIs [2022-12-14 15:23:18,148 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 98 for LOIs [2022-12-14 15:23:18,154 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 123 for LOIs [2022-12-14 15:23:18,250 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 156 for LOIs [2022-12-14 15:23:18,293 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 153 for LOIs [2022-12-14 15:23:18,338 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 148 for LOIs [2022-12-14 15:23:18,381 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:24:10,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1352028924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:24:10,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:24:10,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [7, 11, 9] total 72 [2022-12-14 15:24:10,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777276054] [2022-12-14 15:24:10,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:24:10,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 15:24:10,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:24:10,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 15:24:10,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=4434, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 15:24:10,851 INFO L87 Difference]: Start difference. First operand 1727 states and 2077 transitions. Second operand has 51 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 35 states have internal predecessors, (64), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 15:24:23,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:24:23,450 INFO L93 Difference]: Finished difference Result 3389 states and 4135 transitions. [2022-12-14 15:24:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 15:24:23,450 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 35 states have internal predecessors, (64), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) Word has length 146 [2022-12-14 15:24:23,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:24:23,455 INFO L225 Difference]: With dead ends: 3389 [2022-12-14 15:24:23,455 INFO L226 Difference]: Without dead ends: 1918 [2022-12-14 15:24:23,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 351 SyntacticMatches, 22 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2654 ImplicationChecksByTransitivity, 54.7s TimeCoverageRelationStatistics Valid=717, Invalid=4983, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 15:24:23,456 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 183 mSDsluCounter, 4262 mSDsCounter, 0 mSdLazyCounter, 4798 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 4504 SdHoareTripleChecker+Invalid, 4853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 4798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:24:23,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 4504 Invalid, 4853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 4798 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-12-14 15:24:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2022-12-14 15:24:23,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1903. [2022-12-14 15:24:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1409 states have (on average 1.1944641589779985) internal successors, (1683), 1427 states have internal predecessors, (1683), 308 states have call successors, (308), 185 states have call predecessors, (308), 185 states have return successors, (308), 290 states have call predecessors, (308), 308 states have call successors, (308) [2022-12-14 15:24:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 2299 transitions. [2022-12-14 15:24:23,959 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 2299 transitions. Word has length 146 [2022-12-14 15:24:23,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:24:23,960 INFO L495 AbstractCegarLoop]: Abstraction has 1903 states and 2299 transitions. [2022-12-14 15:24:23,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 35 states have internal predecessors, (64), 11 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-14 15:24:23,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 2299 transitions. [2022-12-14 15:24:23,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 15:24:23,961 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:24:23,961 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, 1] [2022-12-14 15:24:23,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 15:24:24,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 15:24:24,163 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:24:24,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:24:24,164 INFO L85 PathProgramCache]: Analyzing trace with hash 449062168, now seen corresponding path program 1 times [2022-12-14 15:24:24,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:24:24,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596397857] [2022-12-14 15:24:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:24,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:24:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:24,575 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 15:24:24,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:24:24,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596397857] [2022-12-14 15:24:24,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596397857] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:24:24,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847971749] [2022-12-14 15:24:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:24:24,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:24:24,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:24:24,577 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:24:24,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 15:24:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:24:24,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 15:24:24,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:24:24,986 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 15:24:24,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:24:25,205 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 15:24:25,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847971749] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:24:25,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2028292485] [2022-12-14 15:24:25,207 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2022-12-14 15:24:25,207 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:24:25,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:24:25,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:24:25,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:24:45,451 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 129 for LOIs [2022-12-14 15:24:45,633 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 143 for LOIs [2022-12-14 15:24:45,647 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 90 for LOIs [2022-12-14 15:24:45,703 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 103 for LOIs [2022-12-14 15:24:45,782 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 118 for LOIs [2022-12-14 15:24:45,831 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 85 for LOIs [2022-12-14 15:24:45,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:25:15,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '99696#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (<= ~active_side_History_0~0 127) (= ~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) (<= 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) (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) (<= 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 15:25:15,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:25:15,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:25:15,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 22 [2022-12-14 15:25:15,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335582350] [2022-12-14 15:25:15,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:25:15,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 15:25:15,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:25:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 15:25:15,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=7693, Unknown=0, NotChecked=0, Total=8372 [2022-12-14 15:25:15,294 INFO L87 Difference]: Start difference. First operand 1903 states and 2299 transitions. Second operand has 22 states, 22 states have (on average 8.272727272727273) internal successors, (182), 22 states have internal predecessors, (182), 9 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-12-14 15:25:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:25:21,959 INFO L93 Difference]: Finished difference Result 6607 states and 8788 transitions. [2022-12-14 15:25:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-14 15:25:21,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.272727272727273) internal successors, (182), 22 states have internal predecessors, (182), 9 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 148 [2022-12-14 15:25:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:25:21,970 INFO L225 Difference]: With dead ends: 6607 [2022-12-14 15:25:21,970 INFO L226 Difference]: Without dead ends: 5145 [2022-12-14 15:25:21,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 360 SyntacticMatches, 10 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7592 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=1608, Invalid=18132, Unknown=0, NotChecked=0, Total=19740 [2022-12-14 15:25:21,973 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 2737 mSDsluCounter, 2297 mSDsCounter, 0 mSdLazyCounter, 3233 mSolverCounterSat, 1498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2737 SdHoareTripleChecker+Valid, 2734 SdHoareTripleChecker+Invalid, 4731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1498 IncrementalHoareTripleChecker+Valid, 3233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:25:21,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2737 Valid, 2734 Invalid, 4731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1498 Valid, 3233 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 15:25:21,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5145 states. [2022-12-14 15:25:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5145 to 3099. [2022-12-14 15:25:23,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3099 states, 2316 states have (on average 1.205958549222798) internal successors, (2793), 2338 states have internal predecessors, (2793), 481 states have call successors, (481), 301 states have call predecessors, (481), 301 states have return successors, (481), 459 states have call predecessors, (481), 481 states have call successors, (481) [2022-12-14 15:25:23,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 3755 transitions. [2022-12-14 15:25:23,010 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 3755 transitions. Word has length 148 [2022-12-14 15:25:23,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:25:23,010 INFO L495 AbstractCegarLoop]: Abstraction has 3099 states and 3755 transitions. [2022-12-14 15:25:23,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.272727272727273) internal successors, (182), 22 states have internal predecessors, (182), 9 states have call successors, (37), 5 states have call predecessors, (37), 5 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2022-12-14 15:25:23,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 3755 transitions. [2022-12-14 15:25:23,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 15:25:23,012 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:25:23,013 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, 1] [2022-12-14 15:25:23,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 15:25:23,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 15:25:23,213 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:25:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:25:23,214 INFO L85 PathProgramCache]: Analyzing trace with hash 23500130, now seen corresponding path program 1 times [2022-12-14 15:25:23,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:25:23,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774958595] [2022-12-14 15:25:23,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:23,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:25:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:24,008 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 15:25:24,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:25:24,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774958595] [2022-12-14 15:25:24,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774958595] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:25:24,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551504548] [2022-12-14 15:25:24,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:25:24,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:25:24,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:25:24,010 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:25:24,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 15:25:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:25:24,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 15:25:24,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:25:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 15:25:24,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:25:25,417 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 15:25:25,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551504548] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:25:25,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1805381222] [2022-12-14 15:25:25,419 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2022-12-14 15:25:25,419 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:25:25,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:25:25,419 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:25:25,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:25:50,570 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 85 for LOIs [2022-12-14 15:25:50,629 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 15:25:50,634 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 117 for LOIs [2022-12-14 15:25:50,714 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 98 for LOIs [2022-12-14 15:25:50,806 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 91 for LOIs [2022-12-14 15:25:50,825 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 91 for LOIs [2022-12-14 15:25:50,845 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:26:25,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '113511#(and (<= 0 (+ ~manual_selection_History_0~0 128)) (<= 0 (+ ~s1s1_new~0 1)) (<= 0 (+ 2 ~active_side_History_1~0)) (<= ~side1_written~0 0) (= ~s1p~0 0) (exists ((|v_ULTIMATE.start_check_#res#1_BEFORE_CALL_57| Int)) (and (<= |v_ULTIMATE.start_check_#res#1_BEFORE_CALL_57| 1) (<= 0 |v_ULTIMATE.start_check_#res#1_BEFORE_CALL_57|) (= (ite (= |v_ULTIMATE.start_check_#res#1_BEFORE_CALL_57| 0) 0 1) |assert_#in~arg|))) (<= 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)) (<= ~manual_selection_History_1~0 127) (= ~s1s1~0 0) (<= 0 (+ ~s1s2_new~0 1)) (<= 0 ~active_side_History_0~0) (= assert_~arg |assert_#in~arg|) (<= (+ ~cs2_new~0 1) 0) (<= (+ ~s1s2_new~0 1) 0) (= ~s2s2~0 0) (<= 0 (+ ~s1p_new~0 1)) (<= (+ ~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) (<= 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 15:26:25,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:26:25,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:26:25,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 15] total 32 [2022-12-14 15:26:25,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485370248] [2022-12-14 15:26:25,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:26:25,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 15:26:25,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:26:25,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 15:26:25,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=9543, Unknown=0, NotChecked=0, Total=10302 [2022-12-14 15:26:25,975 INFO L87 Difference]: Start difference. First operand 3099 states and 3755 transitions. Second operand has 32 states, 32 states have (on average 6.53125) internal successors, (209), 31 states have internal predecessors, (209), 11 states have call successors, (46), 7 states have call predecessors, (46), 9 states have return successors, (46), 11 states have call predecessors, (46), 10 states have call successors, (46) [2022-12-14 15:26:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:26:40,927 INFO L93 Difference]: Finished difference Result 11034 states and 14337 transitions. [2022-12-14 15:26:40,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-12-14 15:26:40,927 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.53125) internal successors, (209), 31 states have internal predecessors, (209), 11 states have call successors, (46), 7 states have call predecessors, (46), 9 states have return successors, (46), 11 states have call predecessors, (46), 10 states have call successors, (46) Word has length 148 [2022-12-14 15:26:40,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:26:40,943 INFO L225 Difference]: With dead ends: 11034 [2022-12-14 15:26:40,943 INFO L226 Difference]: Without dead ends: 8509 [2022-12-14 15:26:40,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 363 SyntacticMatches, 7 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26898 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=4986, Invalid=61836, Unknown=0, NotChecked=0, Total=66822 [2022-12-14 15:26:40,949 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 2971 mSDsluCounter, 7544 mSDsCounter, 0 mSdLazyCounter, 7994 mSolverCounterSat, 1791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2974 SdHoareTripleChecker+Valid, 8181 SdHoareTripleChecker+Invalid, 9785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1791 IncrementalHoareTripleChecker+Valid, 7994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:26:40,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2974 Valid, 8181 Invalid, 9785 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1791 Valid, 7994 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 15:26:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8509 states. [2022-12-14 15:26:42,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8509 to 3863. [2022-12-14 15:26:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 2884 states have (on average 1.2011095700416088) internal successors, (3464), 2912 states have internal predecessors, (3464), 600 states have call successors, (600), 378 states have call predecessors, (600), 378 states have return successors, (600), 572 states have call predecessors, (600), 600 states have call successors, (600) [2022-12-14 15:26:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 4664 transitions. [2022-12-14 15:26:42,042 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 4664 transitions. Word has length 148 [2022-12-14 15:26:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:26:42,043 INFO L495 AbstractCegarLoop]: Abstraction has 3863 states and 4664 transitions. [2022-12-14 15:26:42,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.53125) internal successors, (209), 31 states have internal predecessors, (209), 11 states have call successors, (46), 7 states have call predecessors, (46), 9 states have return successors, (46), 11 states have call predecessors, (46), 10 states have call successors, (46) [2022-12-14 15:26:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 4664 transitions. [2022-12-14 15:26:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 15:26:42,045 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:26:42,045 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-12-14 15:26:42,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 15:26:42,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:26:42,246 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:26:42,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:26:42,247 INFO L85 PathProgramCache]: Analyzing trace with hash 13003737, now seen corresponding path program 1 times [2022-12-14 15:26:42,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:26:42,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029102638] [2022-12-14 15:26:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:42,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:26:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-12-14 15:26:42,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:26:42,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029102638] [2022-12-14 15:26:42,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029102638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:26:42,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572291327] [2022-12-14 15:26:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:26:42,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:26:42,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:26:42,850 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:26:42,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15d3181b-9db6-4121-ac19-37be02afa015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 15:26:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:26:42,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:26:42,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:26:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 31 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 15:26:43,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:26:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 15:26:43,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572291327] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:26:43,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [543036899] [2022-12-14 15:26:43,262 INFO L159 IcfgInterpreter]: Started Sifa with 82 locations of interest [2022-12-14 15:26:43,262 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:26:43,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:26:43,262 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:26:43,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:26:55,922 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 96 for LOIs [2022-12-14 15:26:55,943 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 98 for LOIs [2022-12-14 15:26:55,948 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 95 for LOIs [2022-12-14 15:26:56,014 INFO L197 IcfgInterpreter]: Interpreting procedure read_side2_failed_history with input of size 139 for LOIs [2022-12-14 15:26:56,093 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 95 for LOIs [2022-12-14 15:26:56,114 INFO L180 IcfgInterpreter]: Interpretation finished