./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label27.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label27.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 497301b92ba25c2f1607465beb3fb2acf88756e6c4b878ac8a9bf2f715106635 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:29:09,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:29:09,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:29:09,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:29:09,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:29:09,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:29:09,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:29:09,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:29:09,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:29:09,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:29:09,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:29:09,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:29:09,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:29:09,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:29:09,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:29:09,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:29:09,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:29:09,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:29:09,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:29:09,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:29:09,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:29:09,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:29:09,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:29:09,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:29:09,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:29:09,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:29:09,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:29:09,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:29:09,716 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:29:09,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:29:09,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:29:09,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:29:09,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:29:09,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:29:09,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:29:09,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:29:09,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:29:09,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:29:09,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:29:09,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:29:09,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:29:09,738 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:29:09,780 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:29:09,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:29:09,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:29:09,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:29:09,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:29:09,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:29:09,784 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:29:09,784 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:29:09,784 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:29:09,784 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:29:09,786 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:29:09,786 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:29:09,786 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:29:09,787 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:29:09,787 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:29:09,787 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:29:09,787 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:29:09,788 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:29:09,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:29:09,789 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:29:09,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:29:09,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:29:09,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:29:09,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:29:09,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:29:09,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:29:09,792 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:29:09,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:29:09,792 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:29:09,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:29:09,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:29:09,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:29:09,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:29:09,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:29:09,794 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:29:09,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:29:09,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:29:09,795 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:29:09,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:29:09,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:29:09,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:29:09,796 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_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497301b92ba25c2f1607465beb3fb2acf88756e6c4b878ac8a9bf2f715106635 [2022-11-26 00:29:10,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:29:10,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:29:10,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:29:10,139 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:29:10,140 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:29:10,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/eca-rers2012/Problem03_label27.c [2022-11-26 00:29:13,929 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:29:14,445 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:29:14,446 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/sv-benchmarks/c/eca-rers2012/Problem03_label27.c [2022-11-26 00:29:14,466 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/data/796e320a7/70ae545c7fb14466b0f0efdf56d5eb84/FLAGf6bcbacf6 [2022-11-26 00:29:14,489 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/data/796e320a7/70ae545c7fb14466b0f0efdf56d5eb84 [2022-11-26 00:29:14,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:29:14,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:29:14,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:29:14,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:29:14,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:29:14,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:29:14" (1/1) ... [2022-11-26 00:29:14,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc6f7b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:14, skipping insertion in model container [2022-11-26 00:29:14,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:29:14" (1/1) ... [2022-11-26 00:29:14,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:29:14,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:29:15,411 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_d6fc75bf-1dff-4689-8f04-276731e1d625/sv-benchmarks/c/eca-rers2012/Problem03_label27.c[54867,54880] [2022-11-26 00:29:15,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:29:15,478 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:29:15,757 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_d6fc75bf-1dff-4689-8f04-276731e1d625/sv-benchmarks/c/eca-rers2012/Problem03_label27.c[54867,54880] [2022-11-26 00:29:15,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:29:15,904 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:29:15,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:15 WrapperNode [2022-11-26 00:29:15,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:29:15,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:29:15,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:29:15,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:29:15,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:15" (1/1) ... [2022-11-26 00:29:15,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:15" (1/1) ... [2022-11-26 00:29:16,116 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-26 00:29:16,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:29:16,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:29:16,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:29:16,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:29:16,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:15" (1/1) ... [2022-11-26 00:29:16,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:15" (1/1) ... [2022-11-26 00:29:16,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:15" (1/1) ... [2022-11-26 00:29:16,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:15" (1/1) ... [2022-11-26 00:29:16,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:15" (1/1) ... [2022-11-26 00:29:16,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:15" (1/1) ... [2022-11-26 00:29:16,229 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:15" (1/1) ... [2022-11-26 00:29:16,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:15" (1/1) ... [2022-11-26 00:29:16,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:29:16,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:29:16,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:29:16,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:29:16,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:15" (1/1) ... [2022-11-26 00:29:16,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:29:16,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:16,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:29:16,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:29:16,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:29:16,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:29:16,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:29:16,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:29:16,474 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:29:16,476 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:29:18,898 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:29:19,400 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:29:19,401 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:29:19,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:29:19 BoogieIcfgContainer [2022-11-26 00:29:19,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:29:19,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:29:19,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:29:19,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:29:19,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:29:14" (1/3) ... [2022-11-26 00:29:19,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@103c8218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:29:19, skipping insertion in model container [2022-11-26 00:29:19,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:15" (2/3) ... [2022-11-26 00:29:19,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@103c8218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:29:19, skipping insertion in model container [2022-11-26 00:29:19,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:29:19" (3/3) ... [2022-11-26 00:29:19,426 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label27.c [2022-11-26 00:29:19,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:29:19,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:29:19,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:29:19,535 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;@71d02d6b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:29:19,536 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:29:19,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:19,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-26 00:29:19,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:19,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:19,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:19,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:19,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1724867080, now seen corresponding path program 1 times [2022-11-26 00:29:19,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:19,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670759347] [2022-11-26 00:29:19,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:19,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:20,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:20,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670759347] [2022-11-26 00:29:20,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670759347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:20,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:20,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:29:20,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389005283] [2022-11-26 00:29:20,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:20,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:29:20,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:20,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:29:20,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:20,802 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:22,071 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-11-26 00:29:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:29:22,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-11-26 00:29:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:22,098 INFO L225 Difference]: With dead ends: 440 [2022-11-26 00:29:22,098 INFO L226 Difference]: Without dead ends: 289 [2022-11-26 00:29:22,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:22,109 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:22,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 22 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:29:22,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-26 00:29:22,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-26 00:29:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.9270833333333333) internal successors, (555), 288 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 555 transitions. [2022-11-26 00:29:22,204 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 555 transitions. Word has length 143 [2022-11-26 00:29:22,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:22,205 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 555 transitions. [2022-11-26 00:29:22,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:22,209 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 555 transitions. [2022-11-26 00:29:22,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-26 00:29:22,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:22,223 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:22,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:29:22,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:22,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:22,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2102123277, now seen corresponding path program 1 times [2022-11-26 00:29:22,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:22,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885498249] [2022-11-26 00:29:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:22,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:22,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:22,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885498249] [2022-11-26 00:29:22,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885498249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:22,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:22,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:29:22,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292286667] [2022-11-26 00:29:22,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:22,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:29:22,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:22,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:29:22,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:22,693 INFO L87 Difference]: Start difference. First operand 289 states and 555 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:23,736 INFO L93 Difference]: Finished difference Result 865 states and 1663 transitions. [2022-11-26 00:29:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:29:23,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-11-26 00:29:23,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:23,741 INFO L225 Difference]: With dead ends: 865 [2022-11-26 00:29:23,741 INFO L226 Difference]: Without dead ends: 577 [2022-11-26 00:29:23,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:23,744 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 180 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:23,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 28 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:29:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-26 00:29:23,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2022-11-26 00:29:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.8954703832752613) internal successors, (1088), 574 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1088 transitions. [2022-11-26 00:29:23,776 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1088 transitions. Word has length 147 [2022-11-26 00:29:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:23,776 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1088 transitions. [2022-11-26 00:29:23,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:23,777 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1088 transitions. [2022-11-26 00:29:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-26 00:29:23,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:23,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:23,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:29:23,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:23,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1067662428, now seen corresponding path program 1 times [2022-11-26 00:29:23,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:23,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784244475] [2022-11-26 00:29:23,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:23,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:24,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:24,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784244475] [2022-11-26 00:29:24,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784244475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:24,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:24,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:29:24,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384524607] [2022-11-26 00:29:24,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:24,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:29:24,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:29:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:24,067 INFO L87 Difference]: Start difference. First operand 575 states and 1088 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:25,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:25,137 INFO L93 Difference]: Finished difference Result 1721 states and 3261 transitions. [2022-11-26 00:29:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:29:25,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2022-11-26 00:29:25,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:25,143 INFO L225 Difference]: With dead ends: 1721 [2022-11-26 00:29:25,144 INFO L226 Difference]: Without dead ends: 1147 [2022-11-26 00:29:25,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:25,147 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 150 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:25,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 97 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:29:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-11-26 00:29:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 861. [2022-11-26 00:29:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 1.6732558139534883) internal successors, (1439), 860 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1439 transitions. [2022-11-26 00:29:25,185 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1439 transitions. Word has length 149 [2022-11-26 00:29:25,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:25,186 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1439 transitions. [2022-11-26 00:29:25,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:25,187 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1439 transitions. [2022-11-26 00:29:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-26 00:29:25,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:25,192 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:25,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:29:25,193 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash -208550100, now seen corresponding path program 1 times [2022-11-26 00:29:25,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:25,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208105103] [2022-11-26 00:29:25,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:25,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:29:25,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:25,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208105103] [2022-11-26 00:29:25,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208105103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:25,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:25,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:29:25,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779992228] [2022-11-26 00:29:25,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:25,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:29:25,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:25,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:29:25,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:25,449 INFO L87 Difference]: Start difference. First operand 861 states and 1439 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:26,528 INFO L93 Difference]: Finished difference Result 2579 states and 4314 transitions. [2022-11-26 00:29:26,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:29:26,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2022-11-26 00:29:26,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:26,536 INFO L225 Difference]: With dead ends: 2579 [2022-11-26 00:29:26,536 INFO L226 Difference]: Without dead ends: 1719 [2022-11-26 00:29:26,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:26,540 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:26,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:29:26,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-26 00:29:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-11-26 00:29:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.6332945285215368) internal successors, (2806), 1718 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2806 transitions. [2022-11-26 00:29:26,590 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2806 transitions. Word has length 155 [2022-11-26 00:29:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:26,591 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2806 transitions. [2022-11-26 00:29:26,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2806 transitions. [2022-11-26 00:29:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-26 00:29:26,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:26,598 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:26,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:29:26,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:26,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:26,599 INFO L85 PathProgramCache]: Analyzing trace with hash 375293327, now seen corresponding path program 1 times [2022-11-26 00:29:26,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:26,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567814822] [2022-11-26 00:29:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:26,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:29:27,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:27,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567814822] [2022-11-26 00:29:27,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567814822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:27,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:27,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:29:27,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202431003] [2022-11-26 00:29:27,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:27,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:29:27,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:27,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:29:27,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:27,059 INFO L87 Difference]: Start difference. First operand 1719 states and 2806 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:28,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:28,108 INFO L93 Difference]: Finished difference Result 5010 states and 8242 transitions. [2022-11-26 00:29:28,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:29:28,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-11-26 00:29:28,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:28,123 INFO L225 Difference]: With dead ends: 5010 [2022-11-26 00:29:28,124 INFO L226 Difference]: Without dead ends: 3292 [2022-11-26 00:29:28,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:28,134 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 142 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:28,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 222 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:29:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3292 states. [2022-11-26 00:29:28,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3292 to 3292. [2022-11-26 00:29:28,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3292 states, 3291 states have (on average 1.4992403524764508) internal successors, (4934), 3291 states have internal predecessors, (4934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3292 states to 3292 states and 4934 transitions. [2022-11-26 00:29:28,276 INFO L78 Accepts]: Start accepts. Automaton has 3292 states and 4934 transitions. Word has length 162 [2022-11-26 00:29:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:28,277 INFO L495 AbstractCegarLoop]: Abstraction has 3292 states and 4934 transitions. [2022-11-26 00:29:28,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3292 states and 4934 transitions. [2022-11-26 00:29:28,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-26 00:29:28,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:28,285 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:28,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:29:28,286 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:28,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:28,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1951300394, now seen corresponding path program 1 times [2022-11-26 00:29:28,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:28,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217998422] [2022-11-26 00:29:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:28,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:29:28,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:28,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217998422] [2022-11-26 00:29:28,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217998422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:28,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:28,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:29:28,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830991977] [2022-11-26 00:29:28,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:28,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:29:28,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:28,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:29:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:28,950 INFO L87 Difference]: Start difference. First operand 3292 states and 4934 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:30,037 INFO L93 Difference]: Finished difference Result 7727 states and 11649 transitions. [2022-11-26 00:29:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:29:30,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2022-11-26 00:29:30,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:30,056 INFO L225 Difference]: With dead ends: 7727 [2022-11-26 00:29:30,056 INFO L226 Difference]: Without dead ends: 4436 [2022-11-26 00:29:30,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:30,061 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 137 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:30,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 222 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:29:30,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2022-11-26 00:29:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 4436. [2022-11-26 00:29:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 1.4340473506200677) internal successors, (6360), 4435 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 6360 transitions. [2022-11-26 00:29:30,187 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 6360 transitions. Word has length 171 [2022-11-26 00:29:30,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:30,187 INFO L495 AbstractCegarLoop]: Abstraction has 4436 states and 6360 transitions. [2022-11-26 00:29:30,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 6360 transitions. [2022-11-26 00:29:30,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-26 00:29:30,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:30,197 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:30,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:29:30,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:30,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:30,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1836480674, now seen corresponding path program 1 times [2022-11-26 00:29:30,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:30,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657503163] [2022-11-26 00:29:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:30,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:30,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:30,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657503163] [2022-11-26 00:29:30,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657503163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:30,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:30,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:29:30,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360897147] [2022-11-26 00:29:30,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:30,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:29:30,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:30,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:29:30,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:30,786 INFO L87 Difference]: Start difference. First operand 4436 states and 6360 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:31,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:31,972 INFO L93 Difference]: Finished difference Result 12877 states and 18504 transitions. [2022-11-26 00:29:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:29:31,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2022-11-26 00:29:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:32,012 INFO L225 Difference]: With dead ends: 12877 [2022-11-26 00:29:32,012 INFO L226 Difference]: Without dead ends: 8442 [2022-11-26 00:29:32,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:32,023 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 138 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:32,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 72 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:29:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8442 states. [2022-11-26 00:29:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8442 to 8440. [2022-11-26 00:29:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8440 states, 8439 states have (on average 1.3842872378243867) internal successors, (11682), 8439 states have internal predecessors, (11682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8440 states to 8440 states and 11682 transitions. [2022-11-26 00:29:32,271 INFO L78 Accepts]: Start accepts. Automaton has 8440 states and 11682 transitions. Word has length 171 [2022-11-26 00:29:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:32,271 INFO L495 AbstractCegarLoop]: Abstraction has 8440 states and 11682 transitions. [2022-11-26 00:29:32,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 8440 states and 11682 transitions. [2022-11-26 00:29:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-26 00:29:32,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:32,287 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:32,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:29:32,288 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:32,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2015271214, now seen corresponding path program 1 times [2022-11-26 00:29:32,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:32,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695752651] [2022-11-26 00:29:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:32,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:29:32,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:32,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695752651] [2022-11-26 00:29:32,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695752651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:32,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:32,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:29:32,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893901562] [2022-11-26 00:29:32,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:32,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:29:32,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:32,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:29:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:32,582 INFO L87 Difference]: Start difference. First operand 8440 states and 11682 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:33,732 INFO L93 Difference]: Finished difference Result 22601 states and 31420 transitions. [2022-11-26 00:29:33,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:29:33,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2022-11-26 00:29:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:33,801 INFO L225 Difference]: With dead ends: 22601 [2022-11-26 00:29:33,802 INFO L226 Difference]: Without dead ends: 14162 [2022-11-26 00:29:33,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:33,815 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 158 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:33,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 71 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:29:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14162 states. [2022-11-26 00:29:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14162 to 12301. [2022-11-26 00:29:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12301 states, 12300 states have (on average 1.3490243902439025) internal successors, (16593), 12300 states have internal predecessors, (16593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12301 states to 12301 states and 16593 transitions. [2022-11-26 00:29:34,238 INFO L78 Accepts]: Start accepts. Automaton has 12301 states and 16593 transitions. Word has length 184 [2022-11-26 00:29:34,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:34,244 INFO L495 AbstractCegarLoop]: Abstraction has 12301 states and 16593 transitions. [2022-11-26 00:29:34,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:34,245 INFO L276 IsEmpty]: Start isEmpty. Operand 12301 states and 16593 transitions. [2022-11-26 00:29:34,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-26 00:29:34,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:34,259 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:34,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:29:34,260 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:34,261 INFO L85 PathProgramCache]: Analyzing trace with hash -674899003, now seen corresponding path program 1 times [2022-11-26 00:29:34,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:34,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165648149] [2022-11-26 00:29:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:34,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:34,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:34,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165648149] [2022-11-26 00:29:34,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165648149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:34,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:34,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:29:34,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293238619] [2022-11-26 00:29:34,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:34,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:29:34,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:34,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:29:34,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:29:34,709 INFO L87 Difference]: Start difference. First operand 12301 states and 16593 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:36,376 INFO L93 Difference]: Finished difference Result 24601 states and 33185 transitions. [2022-11-26 00:29:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:29:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2022-11-26 00:29:36,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:36,406 INFO L225 Difference]: With dead ends: 24601 [2022-11-26 00:29:36,407 INFO L226 Difference]: Without dead ends: 12301 [2022-11-26 00:29:36,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:29:36,420 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 262 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:36,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 66 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-26 00:29:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12301 states. [2022-11-26 00:29:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12301 to 11872. [2022-11-26 00:29:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11872 states, 11871 states have (on average 1.3483278578047342) internal successors, (16006), 11871 states have internal predecessors, (16006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:36,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11872 states to 11872 states and 16006 transitions. [2022-11-26 00:29:36,874 INFO L78 Accepts]: Start accepts. Automaton has 11872 states and 16006 transitions. Word has length 187 [2022-11-26 00:29:36,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:36,875 INFO L495 AbstractCegarLoop]: Abstraction has 11872 states and 16006 transitions. [2022-11-26 00:29:36,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:36,876 INFO L276 IsEmpty]: Start isEmpty. Operand 11872 states and 16006 transitions. [2022-11-26 00:29:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-26 00:29:36,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:36,911 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:36,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:29:36,911 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:36,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:36,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1836560856, now seen corresponding path program 1 times [2022-11-26 00:29:36,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:36,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771307618] [2022-11-26 00:29:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:36,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:29:37,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:37,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771307618] [2022-11-26 00:29:37,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771307618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:29:37,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113618188] [2022-11-26 00:29:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:37,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:37,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:37,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:37,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:29:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:37,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:29:37,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 00:29:38,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:29:38,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113618188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:38,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:29:38,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-26 00:29:38,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526778979] [2022-11-26 00:29:38,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:38,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:29:38,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:29:38,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:29:38,335 INFO L87 Difference]: Start difference. First operand 11872 states and 16006 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:39,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:39,629 INFO L93 Difference]: Finished difference Result 24744 states and 33715 transitions. [2022-11-26 00:29:39,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:29:39,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2022-11-26 00:29:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:39,659 INFO L225 Difference]: With dead ends: 24744 [2022-11-26 00:29:39,660 INFO L226 Difference]: Without dead ends: 12873 [2022-11-26 00:29:39,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:29:39,671 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:39,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 231 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:29:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12873 states. [2022-11-26 00:29:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12873 to 12873. [2022-11-26 00:29:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12873 states, 12872 states have (on average 1.3538688626476072) internal successors, (17427), 12872 states have internal predecessors, (17427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12873 states to 12873 states and 17427 transitions. [2022-11-26 00:29:39,960 INFO L78 Accepts]: Start accepts. Automaton has 12873 states and 17427 transitions. Word has length 194 [2022-11-26 00:29:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:39,961 INFO L495 AbstractCegarLoop]: Abstraction has 12873 states and 17427 transitions. [2022-11-26 00:29:39,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 12873 states and 17427 transitions. [2022-11-26 00:29:39,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-11-26 00:29:39,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:39,980 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:39,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:29:40,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:29:40,187 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:40,189 INFO L85 PathProgramCache]: Analyzing trace with hash -153718945, now seen corresponding path program 1 times [2022-11-26 00:29:40,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:40,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172109783] [2022-11-26 00:29:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:40,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:29:40,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:40,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172109783] [2022-11-26 00:29:40,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172109783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:40,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:40,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:29:40,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770082523] [2022-11-26 00:29:40,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:40,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:29:40,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:40,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:29:40,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:40,873 INFO L87 Difference]: Start difference. First operand 12873 states and 17427 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:42,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:42,161 INFO L93 Difference]: Finished difference Result 30180 states and 40930 transitions. [2022-11-26 00:29:42,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:29:42,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2022-11-26 00:29:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:42,291 INFO L225 Difference]: With dead ends: 30180 [2022-11-26 00:29:42,291 INFO L226 Difference]: Without dead ends: 17308 [2022-11-26 00:29:42,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:42,301 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 130 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:42,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 126 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:29:42,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17308 states. [2022-11-26 00:29:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17308 to 17306. [2022-11-26 00:29:42,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17306 states, 17305 states have (on average 1.3538861600693441) internal successors, (23429), 17305 states have internal predecessors, (23429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:42,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17306 states to 17306 states and 23429 transitions. [2022-11-26 00:29:42,668 INFO L78 Accepts]: Start accepts. Automaton has 17306 states and 23429 transitions. Word has length 201 [2022-11-26 00:29:42,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:42,669 INFO L495 AbstractCegarLoop]: Abstraction has 17306 states and 23429 transitions. [2022-11-26 00:29:42,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:42,669 INFO L276 IsEmpty]: Start isEmpty. Operand 17306 states and 23429 transitions. [2022-11-26 00:29:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-26 00:29:42,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:42,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:42,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:29:42,688 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:42,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:42,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1583352469, now seen corresponding path program 1 times [2022-11-26 00:29:42,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:42,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709937519] [2022-11-26 00:29:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:42,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:29:43,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:43,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709937519] [2022-11-26 00:29:43,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709937519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:43,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:43,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:29:43,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309198224] [2022-11-26 00:29:43,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:43,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:29:43,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:43,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:29:43,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:43,330 INFO L87 Difference]: Start difference. First operand 17306 states and 23429 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:44,665 INFO L93 Difference]: Finished difference Result 43622 states and 58937 transitions. [2022-11-26 00:29:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:29:44,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2022-11-26 00:29:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:44,753 INFO L225 Difference]: With dead ends: 43622 [2022-11-26 00:29:44,754 INFO L226 Difference]: Without dead ends: 26603 [2022-11-26 00:29:44,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:44,778 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 155 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:44,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 112 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:29:44,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26603 states. [2022-11-26 00:29:45,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26603 to 26601. [2022-11-26 00:29:45,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26601 states, 26600 states have (on average 1.3381954887218046) internal successors, (35596), 26600 states have internal predecessors, (35596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26601 states to 26601 states and 35596 transitions. [2022-11-26 00:29:45,407 INFO L78 Accepts]: Start accepts. Automaton has 26601 states and 35596 transitions. Word has length 205 [2022-11-26 00:29:45,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:45,407 INFO L495 AbstractCegarLoop]: Abstraction has 26601 states and 35596 transitions. [2022-11-26 00:29:45,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 26601 states and 35596 transitions. [2022-11-26 00:29:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-26 00:29:45,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:45,429 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:45,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:29:45,429 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:45,430 INFO L85 PathProgramCache]: Analyzing trace with hash -242531497, now seen corresponding path program 1 times [2022-11-26 00:29:45,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:45,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399282078] [2022-11-26 00:29:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:45,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:29:45,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:45,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399282078] [2022-11-26 00:29:45,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399282078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:45,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:45,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:29:45,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954229658] [2022-11-26 00:29:45,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:45,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:29:45,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:29:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:45,802 INFO L87 Difference]: Start difference. First operand 26601 states and 35596 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:47,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:47,107 INFO L93 Difference]: Finished difference Result 55918 states and 75933 transitions. [2022-11-26 00:29:47,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:29:47,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2022-11-26 00:29:47,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:47,341 INFO L225 Difference]: With dead ends: 55918 [2022-11-26 00:29:47,341 INFO L226 Difference]: Without dead ends: 29890 [2022-11-26 00:29:47,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:47,356 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 108 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:47,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 253 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:29:47,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29890 states. [2022-11-26 00:29:47,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29890 to 27030. [2022-11-26 00:29:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27030 states, 27029 states have (on average 1.2938695475230308) internal successors, (34972), 27029 states have internal predecessors, (34972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:48,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27030 states to 27030 states and 34972 transitions. [2022-11-26 00:29:48,022 INFO L78 Accepts]: Start accepts. Automaton has 27030 states and 34972 transitions. Word has length 207 [2022-11-26 00:29:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:48,023 INFO L495 AbstractCegarLoop]: Abstraction has 27030 states and 34972 transitions. [2022-11-26 00:29:48,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 27030 states and 34972 transitions. [2022-11-26 00:29:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-26 00:29:48,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:48,046 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:48,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:29:48,046 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:48,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:48,047 INFO L85 PathProgramCache]: Analyzing trace with hash 866158633, now seen corresponding path program 1 times [2022-11-26 00:29:48,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:48,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326314035] [2022-11-26 00:29:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:48,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-26 00:29:48,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:48,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326314035] [2022-11-26 00:29:48,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326314035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:29:48,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114317040] [2022-11-26 00:29:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:48,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:48,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:48,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:29:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:48,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:29:48,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:29:49,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:29:49,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114317040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:49,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1222267407] [2022-11-26 00:29:49,819 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-11-26 00:29:49,819 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:29:49,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:29:49,832 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:29:49,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:39:52,642 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2022-11-26 00:39:53,006 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 69120 conjuctions. This might take some time... [2022-11-26 00:40:10,757 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1728 conjuctions. [2022-11-26 00:40:10,837 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2022-11-26 00:40:11,174 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 69120 conjuctions. This might take some time... [2022-11-26 00:40:30,447 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1728 conjuctions. [2022-11-26 00:40:33,581 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2022-11-26 00:40:33,864 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 69120 conjuctions. This might take some time... [2022-11-26 00:40:52,230 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1728 conjuctions. [2022-11-26 00:42:27,234 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:42:56,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '367567#(and (<= 26 ~z~0) (<= 5 ~e~0) (<= 25 ~y~0) (<= ~a0~0 1) (<= ~a7~0 0) (<= ~c~0 3) (= ~a26~0 1) (<= ~e~0 5) (<= 6 ~f~0) (<= 0 |#NULL.base|) (<= ~a1~0 1) (<= ~w~0 23) (<= ~u~0 21) (<= 1 ~a1~0) (<= 1 ~a16~0) (<= |ULTIMATE.start_calculate_output_~input#1| 6) (<= ~a10~0 1) (<= 1 |ULTIMATE.start_calculate_output_~input#1|) (<= |ULTIMATE.start_main_~input~0#1| 6) (<= ~a20~0 0) (<= 0 ~a7~0) (<= ~a9~0 1) (<= ~a4~0 1) (<= 0 ~a17~0) (<= 0 ~a23~0) (<= 0 ~a20~0) (<= ~a13~0 1) (= ~a5~0 1) (<= 0 ~a14~0) (<= ~x~0 24) (<= ~b~0 2) (<= ~a2~0 0) (<= 1 ~a22~0) (<= 1 ~a4~0) (<= ~a21~0 1) (<= 3 ~c~0) (<= 1 ~a24~0) (<= 1 ~a0~0) (<= ~a28~0 1) (<= |ULTIMATE.start_calculate_output_#in~input#1| 6) (<= 0 ~a12~0) (<= 1 ~a21~0) (<= 0 ~a19~0) (<= |#NULL.offset| 0) (<= ~v~0 22) (<= ~a15~0 1) (<= ~a22~0 1) (<= 1 |ULTIMATE.start_main_~input~0#1|) (<= ~a~0 1) (<= 4 ~d~0) (<= 0 ~a11~0) (<= 23 ~w~0) (<= ~a17~0 0) (<= ~a23~0 0) (<= ~a24~0 1) (<= ~z~0 26) (<= 21 ~u~0) (<= 2 ~b~0) (<= 0 (+ |ULTIMATE.start_main_~output~0#1| 1)) (<= 1 |ULTIMATE.start_calculate_output_#in~input#1|) (not (= ~a12~0 1)) (<= 1 ~a9~0) (not (= ~a6~0 1)) (<= |#NULL.base| 0) (<= ~a8~0 0) (<= ~a14~0 0) (<= 1 ~a29~0) (<= ~y~0 25) (<= 1 ~a13~0) (<= 1 ~a28~0) (<= 0 ~a6~0) (<= 1 ~a~0) (= ~a27~0 1) (<= 22 ~v~0) (not (= ~a11~0 1)) (<= 1 ~a10~0) (<= 0 ~a2~0) (<= 1 ~a15~0) (<= 0 |#NULL.offset|) (<= ~d~0 4) (<= 0 |#StackHeapBarrier|) (= ~a3~0 0) (= ~a18~0 1) (<= ~a25~0 0) (<= ~a29~0 1) (<= 0 ~a8~0) (<= ~f~0 6) (<= ~a16~0 1) (<= 0 ~a25~0) (<= 24 ~x~0) (<= ~a19~0 0))' at error location [2022-11-26 00:42:56,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:42:56,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:42:56,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-11-26 00:42:56,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764165598] [2022-11-26 00:42:56,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:42:56,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:42:56,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:42:56,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:42:56,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:42:56,861 INFO L87 Difference]: Start difference. First operand 27030 states and 34972 transitions. Second operand has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:01,687 INFO L93 Difference]: Finished difference Result 96107 states and 125263 transitions. [2022-11-26 00:43:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:43:01,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2022-11-26 00:43:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:01,831 INFO L225 Difference]: With dead ends: 96107 [2022-11-26 00:43:01,832 INFO L226 Difference]: Without dead ends: 69793 [2022-11-26 00:43:01,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 462 SyntacticMatches, 172 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:43:01,868 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1770 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 2925 mSolverCounterSat, 872 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1770 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 872 IncrementalHoareTripleChecker+Valid, 2925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:01,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1770 Valid, 112 Invalid, 3797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [872 Valid, 2925 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-26 00:43:01,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69793 states. [2022-11-26 00:43:02,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69793 to 65068. [2022-11-26 00:43:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65068 states, 65067 states have (on average 1.2520325203252032) internal successors, (81466), 65067 states have internal predecessors, (81466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65068 states to 65068 states and 81466 transitions. [2022-11-26 00:43:03,095 INFO L78 Accepts]: Start accepts. Automaton has 65068 states and 81466 transitions. Word has length 212 [2022-11-26 00:43:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:03,096 INFO L495 AbstractCegarLoop]: Abstraction has 65068 states and 81466 transitions. [2022-11-26 00:43:03,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 65068 states and 81466 transitions. [2022-11-26 00:43:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-26 00:43:03,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:03,122 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2022-11-26 00:43:03,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:03,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:03,330 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:03,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:03,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2121427618, now seen corresponding path program 1 times [2022-11-26 00:43:03,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:03,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298301097] [2022-11-26 00:43:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:03,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:04,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:04,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298301097] [2022-11-26 00:43:04,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298301097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:04,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151187503] [2022-11-26 00:43:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:04,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:04,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:04,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:04,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:43:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:04,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:43:04,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:43:04,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:43:04,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151187503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:04,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:43:04,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-26 00:43:04,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753844056] [2022-11-26 00:43:04,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:04,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:43:04,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:04,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:43:04,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:43:04,495 INFO L87 Difference]: Start difference. First operand 65068 states and 81466 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:05,910 INFO L93 Difference]: Finished difference Result 132423 states and 166972 transitions. [2022-11-26 00:43:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:43:05,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2022-11-26 00:43:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:06,058 INFO L225 Difference]: With dead ends: 132423 [2022-11-26 00:43:06,059 INFO L226 Difference]: Without dead ends: 69072 [2022-11-26 00:43:06,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:43:06,102 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 44 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:06,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 194 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:43:06,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69072 states. [2022-11-26 00:43:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69072 to 69072. [2022-11-26 00:43:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69072 states, 69071 states have (on average 1.240144199446946) internal successors, (85658), 69071 states have internal predecessors, (85658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:07,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69072 states to 69072 states and 85658 transitions. [2022-11-26 00:43:07,802 INFO L78 Accepts]: Start accepts. Automaton has 69072 states and 85658 transitions. Word has length 243 [2022-11-26 00:43:07,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:07,803 INFO L495 AbstractCegarLoop]: Abstraction has 69072 states and 85658 transitions. [2022-11-26 00:43:07,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 69072 states and 85658 transitions. [2022-11-26 00:43:07,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-26 00:43:07,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:07,829 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:07,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:08,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:43:08,038 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:08,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:08,040 INFO L85 PathProgramCache]: Analyzing trace with hash 837778474, now seen corresponding path program 1 times [2022-11-26 00:43:08,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:08,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028878333] [2022-11-26 00:43:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:08,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:08,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:08,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028878333] [2022-11-26 00:43:08,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028878333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:08,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:43:08,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:43:08,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165361165] [2022-11-26 00:43:08,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:08,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:43:08,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:08,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:43:08,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:43:08,326 INFO L87 Difference]: Start difference. First operand 69072 states and 85658 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:10,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:10,435 INFO L93 Difference]: Finished difference Result 138286 states and 172250 transitions. [2022-11-26 00:43:10,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:43:10,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2022-11-26 00:43:10,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:10,530 INFO L225 Difference]: With dead ends: 138286 [2022-11-26 00:43:10,530 INFO L226 Difference]: Without dead ends: 70359 [2022-11-26 00:43:10,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:43:10,558 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 141 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:10,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 216 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:43:10,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70359 states. [2022-11-26 00:43:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70359 to 68929. [2022-11-26 00:43:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68929 states, 68928 states have (on average 1.2196639972144847) internal successors, (84069), 68928 states have internal predecessors, (84069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68929 states to 68929 states and 84069 transitions. [2022-11-26 00:43:12,012 INFO L78 Accepts]: Start accepts. Automaton has 68929 states and 84069 transitions. Word has length 245 [2022-11-26 00:43:12,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:12,013 INFO L495 AbstractCegarLoop]: Abstraction has 68929 states and 84069 transitions. [2022-11-26 00:43:12,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:12,013 INFO L276 IsEmpty]: Start isEmpty. Operand 68929 states and 84069 transitions. [2022-11-26 00:43:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-26 00:43:12,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:12,044 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:12,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:43:12,045 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:12,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:12,046 INFO L85 PathProgramCache]: Analyzing trace with hash -833387662, now seen corresponding path program 1 times [2022-11-26 00:43:12,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:12,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375386643] [2022-11-26 00:43:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:12,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-26 00:43:12,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:12,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375386643] [2022-11-26 00:43:12,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375386643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:12,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:43:12,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:43:12,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367455085] [2022-11-26 00:43:12,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:12,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:43:12,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:12,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:43:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:43:12,837 INFO L87 Difference]: Start difference. First operand 68929 states and 84069 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:14,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:14,493 INFO L93 Difference]: Finished difference Result 116693 states and 142053 transitions. [2022-11-26 00:43:14,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:43:14,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-11-26 00:43:14,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:14,687 INFO L225 Difference]: With dead ends: 116693 [2022-11-26 00:43:14,687 INFO L226 Difference]: Without dead ends: 43904 [2022-11-26 00:43:14,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:43:14,709 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 374 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:14,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 11 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:43:14,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43904 states. [2022-11-26 00:43:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43904 to 39042. [2022-11-26 00:43:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39042 states, 39041 states have (on average 1.1216925795958095) internal successors, (43792), 39041 states have internal predecessors, (43792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:15,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39042 states to 39042 states and 43792 transitions. [2022-11-26 00:43:15,359 INFO L78 Accepts]: Start accepts. Automaton has 39042 states and 43792 transitions. Word has length 266 [2022-11-26 00:43:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:15,360 INFO L495 AbstractCegarLoop]: Abstraction has 39042 states and 43792 transitions. [2022-11-26 00:43:15,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand 39042 states and 43792 transitions. [2022-11-26 00:43:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-11-26 00:43:15,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:15,553 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:15,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:43:15,553 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:15,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:15,554 INFO L85 PathProgramCache]: Analyzing trace with hash -704736606, now seen corresponding path program 1 times [2022-11-26 00:43:15,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:15,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53731761] [2022-11-26 00:43:15,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:15,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-26 00:43:16,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:16,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53731761] [2022-11-26 00:43:16,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53731761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:16,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:43:16,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:43:16,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25511061] [2022-11-26 00:43:16,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:16,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:43:16,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:16,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:43:16,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:43:16,532 INFO L87 Difference]: Start difference. First operand 39042 states and 43792 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:17,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:17,495 INFO L93 Difference]: Finished difference Result 75938 states and 85343 transitions. [2022-11-26 00:43:17,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:43:17,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2022-11-26 00:43:17,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:17,534 INFO L225 Difference]: With dead ends: 75938 [2022-11-26 00:43:17,534 INFO L226 Difference]: Without dead ends: 38184 [2022-11-26 00:43:17,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:43:17,551 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:17,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 72 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:43:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38184 states. [2022-11-26 00:43:18,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38184 to 38184. [2022-11-26 00:43:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38184 states, 38183 states have (on average 1.1235890317680644) internal successors, (42902), 38183 states have internal predecessors, (42902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38184 states to 38184 states and 42902 transitions. [2022-11-26 00:43:18,143 INFO L78 Accepts]: Start accepts. Automaton has 38184 states and 42902 transitions. Word has length 271 [2022-11-26 00:43:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:18,143 INFO L495 AbstractCegarLoop]: Abstraction has 38184 states and 42902 transitions. [2022-11-26 00:43:18,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 38184 states and 42902 transitions. [2022-11-26 00:43:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-11-26 00:43:18,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:18,153 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2022-11-26 00:43:18,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 00:43:18,154 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1669695700, now seen corresponding path program 1 times [2022-11-26 00:43:18,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:18,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664660422] [2022-11-26 00:43:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:18,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 144 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-26 00:43:18,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:18,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664660422] [2022-11-26 00:43:18,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664660422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:18,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493760350] [2022-11-26 00:43:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:18,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:18,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:18,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:18,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:43:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:19,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:43:19,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-26 00:43:19,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:43:19,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493760350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:19,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:43:19,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-26 00:43:19,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303636959] [2022-11-26 00:43:19,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:19,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:43:19,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:19,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:43:19,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:43:19,289 INFO L87 Difference]: Start difference. First operand 38184 states and 42902 transitions. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:20,854 INFO L93 Difference]: Finished difference Result 79084 states and 89199 transitions. [2022-11-26 00:43:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:43:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 282 [2022-11-26 00:43:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:20,906 INFO L225 Difference]: With dead ends: 79084 [2022-11-26 00:43:20,906 INFO L226 Difference]: Without dead ends: 42188 [2022-11-26 00:43:20,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:43:20,927 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 253 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:20,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 41 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:43:20,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42188 states. [2022-11-26 00:43:21,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42188 to 41616. [2022-11-26 00:43:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41616 states, 41615 states have (on average 1.109335576114382) internal successors, (46165), 41615 states have internal predecessors, (46165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41616 states to 41616 states and 46165 transitions. [2022-11-26 00:43:21,896 INFO L78 Accepts]: Start accepts. Automaton has 41616 states and 46165 transitions. Word has length 282 [2022-11-26 00:43:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:21,897 INFO L495 AbstractCegarLoop]: Abstraction has 41616 states and 46165 transitions. [2022-11-26 00:43:21,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 41616 states and 46165 transitions. [2022-11-26 00:43:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-11-26 00:43:21,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:21,916 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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] [2022-11-26 00:43:21,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-26 00:43:22,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:22,123 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:22,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:22,124 INFO L85 PathProgramCache]: Analyzing trace with hash 905963261, now seen corresponding path program 1 times [2022-11-26 00:43:22,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:22,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638718106] [2022-11-26 00:43:22,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:22,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 196 proven. 47 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:43:23,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:23,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638718106] [2022-11-26 00:43:23,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638718106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:23,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395783720] [2022-11-26 00:43:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:23,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:23,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:23,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:23,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:43:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:24,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:43:24,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 00:43:24,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:43:24,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395783720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:24,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:43:24,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-11-26 00:43:24,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139439477] [2022-11-26 00:43:24,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:24,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:43:24,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:24,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:43:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:43:24,233 INFO L87 Difference]: Start difference. First operand 41616 states and 46165 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:25,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:25,251 INFO L93 Difference]: Finished difference Result 93384 states and 103973 transitions. [2022-11-26 00:43:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:43:25,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 314 [2022-11-26 00:43:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:25,307 INFO L225 Difference]: With dead ends: 93384 [2022-11-26 00:43:25,307 INFO L226 Difference]: Without dead ends: 53056 [2022-11-26 00:43:25,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:43:25,328 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 144 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:25,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 56 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:43:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53056 states. [2022-11-26 00:43:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53056 to 49910. [2022-11-26 00:43:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49910 states, 49909 states have (on average 1.1041695886513454) internal successors, (55108), 49909 states have internal predecessors, (55108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49910 states to 49910 states and 55108 transitions. [2022-11-26 00:43:26,125 INFO L78 Accepts]: Start accepts. Automaton has 49910 states and 55108 transitions. Word has length 314 [2022-11-26 00:43:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:26,125 INFO L495 AbstractCegarLoop]: Abstraction has 49910 states and 55108 transitions. [2022-11-26 00:43:26,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:26,126 INFO L276 IsEmpty]: Start isEmpty. Operand 49910 states and 55108 transitions. [2022-11-26 00:43:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-11-26 00:43:26,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:26,141 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:26,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:26,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:26,342 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:26,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:26,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1983670869, now seen corresponding path program 1 times [2022-11-26 00:43:26,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:26,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405412918] [2022-11-26 00:43:26,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:26,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 198 proven. 65 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 00:43:28,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:28,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405412918] [2022-11-26 00:43:28,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405412918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:28,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20230608] [2022-11-26 00:43:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:28,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:28,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:28,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:28,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:43:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:28,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:43:28,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-26 00:43:28,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:43:28,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20230608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:28,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:43:28,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-26 00:43:28,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604366853] [2022-11-26 00:43:28,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:28,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:43:28,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:28,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:43:28,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:43:28,754 INFO L87 Difference]: Start difference. First operand 49910 states and 55108 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:29,916 INFO L93 Difference]: Finished difference Result 96959 states and 107079 transitions. [2022-11-26 00:43:29,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:43:29,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2022-11-26 00:43:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:29,968 INFO L225 Difference]: With dead ends: 96959 [2022-11-26 00:43:29,968 INFO L226 Difference]: Without dead ends: 49195 [2022-11-26 00:43:29,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:43:29,983 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 126 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:29,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 179 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:43:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49195 states. [2022-11-26 00:43:30,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49195 to 49052. [2022-11-26 00:43:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49052 states, 49051 states have (on average 1.0992232574259444) internal successors, (53918), 49051 states have internal predecessors, (53918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:30,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49052 states to 49052 states and 53918 transitions. [2022-11-26 00:43:30,837 INFO L78 Accepts]: Start accepts. Automaton has 49052 states and 53918 transitions. Word has length 330 [2022-11-26 00:43:30,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:30,837 INFO L495 AbstractCegarLoop]: Abstraction has 49052 states and 53918 transitions. [2022-11-26 00:43:30,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:30,837 INFO L276 IsEmpty]: Start isEmpty. Operand 49052 states and 53918 transitions. [2022-11-26 00:43:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-11-26 00:43:30,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:30,852 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:30,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:31,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:31,060 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:31,061 INFO L85 PathProgramCache]: Analyzing trace with hash 390123061, now seen corresponding path program 1 times [2022-11-26 00:43:31,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:31,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266225793] [2022-11-26 00:43:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:31,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 190 proven. 69 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:43:31,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:31,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266225793] [2022-11-26 00:43:31,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266225793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:31,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616674328] [2022-11-26 00:43:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:31,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:31,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:31,381 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:31,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:43:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:31,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:43:31,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:43:32,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:43:32,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616674328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:32,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:43:32,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-11-26 00:43:32,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079072385] [2022-11-26 00:43:32,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:32,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:43:32,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:32,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:43:32,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:43:32,053 INFO L87 Difference]: Start difference. First operand 49052 states and 53918 transitions. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:33,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:33,782 INFO L93 Difference]: Finished difference Result 111831 states and 122656 transitions. [2022-11-26 00:43:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:43:33,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 334 [2022-11-26 00:43:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:33,851 INFO L225 Difference]: With dead ends: 111831 [2022-11-26 00:43:33,852 INFO L226 Difference]: Without dead ends: 64210 [2022-11-26 00:43:33,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:43:33,877 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 238 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:33,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 193 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 00:43:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64210 states. [2022-11-26 00:43:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64210 to 61207. [2022-11-26 00:43:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61207 states, 61206 states have (on average 1.093340522171029) internal successors, (66919), 61206 states have internal predecessors, (66919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61207 states to 61207 states and 66919 transitions. [2022-11-26 00:43:34,914 INFO L78 Accepts]: Start accepts. Automaton has 61207 states and 66919 transitions. Word has length 334 [2022-11-26 00:43:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:34,914 INFO L495 AbstractCegarLoop]: Abstraction has 61207 states and 66919 transitions. [2022-11-26 00:43:34,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 61207 states and 66919 transitions. [2022-11-26 00:43:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-11-26 00:43:34,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:34,931 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 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] [2022-11-26 00:43:34,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:35,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-26 00:43:35,131 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:35,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:35,132 INFO L85 PathProgramCache]: Analyzing trace with hash 701527057, now seen corresponding path program 1 times [2022-11-26 00:43:35,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:35,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895486311] [2022-11-26 00:43:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:35,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 226 proven. 74 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:43:37,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:37,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895486311] [2022-11-26 00:43:37,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895486311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:37,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669811625] [2022-11-26 00:43:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:37,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:37,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:37,179 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:37,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:43:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:37,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:43:37,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-26 00:43:37,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:43:37,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669811625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:37,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:43:37,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-11-26 00:43:37,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670418347] [2022-11-26 00:43:37,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:37,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:43:37,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:37,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:43:37,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:43:37,583 INFO L87 Difference]: Start difference. First operand 61207 states and 66919 transitions. Second operand has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:39,228 INFO L93 Difference]: Finished difference Result 129992 states and 142365 transitions. [2022-11-26 00:43:39,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:43:39,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 340 [2022-11-26 00:43:39,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:39,301 INFO L225 Difference]: With dead ends: 129992 [2022-11-26 00:43:39,301 INFO L226 Difference]: Without dead ends: 70931 [2022-11-26 00:43:39,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:43:39,323 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 288 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:39,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 191 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:43:39,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70931 states. [2022-11-26 00:43:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70931 to 67213. [2022-11-26 00:43:40,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67213 states, 67212 states have (on average 1.0965006248884128) internal successors, (73698), 67212 states have internal predecessors, (73698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67213 states to 67213 states and 73698 transitions. [2022-11-26 00:43:40,406 INFO L78 Accepts]: Start accepts. Automaton has 67213 states and 73698 transitions. Word has length 340 [2022-11-26 00:43:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:40,406 INFO L495 AbstractCegarLoop]: Abstraction has 67213 states and 73698 transitions. [2022-11-26 00:43:40,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:40,407 INFO L276 IsEmpty]: Start isEmpty. Operand 67213 states and 73698 transitions. [2022-11-26 00:43:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-11-26 00:43:40,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:40,425 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-26 00:43:40,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:40,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-26 00:43:40,626 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:40,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:40,627 INFO L85 PathProgramCache]: Analyzing trace with hash 620003456, now seen corresponding path program 1 times [2022-11-26 00:43:40,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:40,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811829740] [2022-11-26 00:43:40,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:40,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 269 proven. 82 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:43:42,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:42,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811829740] [2022-11-26 00:43:42,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811829740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:42,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800843896] [2022-11-26 00:43:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:42,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:42,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:42,941 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:42,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fc75bf-1dff-4689-8f04-276731e1d625/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:43:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:43,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:43:43,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-26 00:43:44,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:43:44,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800843896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:43:44,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:43:44,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-26 00:43:44,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194575543] [2022-11-26 00:43:44,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:43:44,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:43:44,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:43:44,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:43:44,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:43:44,010 INFO L87 Difference]: Start difference. First operand 67213 states and 73698 transitions. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)