./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label35.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label35.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7d54fa4bc915c3e337e3a3fd5a20fd6a2b066ccd7f01acca135e0e9b0e83a6b2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:48:20,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:48:20,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:48:20,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:48:20,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:48:20,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:48:20,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:48:20,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:48:20,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:48:20,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:48:20,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:48:20,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:48:20,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:48:20,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:48:20,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:48:20,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:48:20,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:48:20,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:48:20,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:48:20,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:48:20,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:48:20,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:48:20,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:48:20,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:48:20,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:48:20,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:48:20,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:48:20,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:48:20,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:48:20,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:48:20,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:48:20,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:48:20,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:48:20,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:48:20,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:48:20,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:48:20,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:48:20,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:48:20,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:48:20,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:48:20,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:48:20,926 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:48:20,945 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:48:20,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:48:20,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:48:20,945 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:48:20,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:48:20,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:48:20,946 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:48:20,946 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:48:20,946 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:48:20,947 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:48:20,947 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:48:20,947 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:48:20,947 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:48:20,947 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:48:20,947 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:48:20,948 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:48:20,948 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:48:20,948 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:48:20,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:48:20,949 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:48:20,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:48:20,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:48:20,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:48:20,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:48:20,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:48:20,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:48:20,949 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:48:20,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:48:20,950 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:48:20,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:48:20,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:48:20,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:48:20,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:48:20,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:48:20,951 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:48:20,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:48:20,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:48:20,951 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:48:20,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:48:20,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:48:20,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:48:20,951 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_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d54fa4bc915c3e337e3a3fd5a20fd6a2b066ccd7f01acca135e0e9b0e83a6b2 [2022-12-14 07:48:21,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:48:21,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:48:21,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:48:21,144 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:48:21,144 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:48:21,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/eca-rers2012/Problem03_label35.c [2022-12-14 07:48:23,764 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:48:23,979 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:48:23,979 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/sv-benchmarks/c/eca-rers2012/Problem03_label35.c [2022-12-14 07:48:23,990 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/data/9ee20e641/0a9ebdf586104a528aec416ea6c402ed/FLAG5b1f81e61 [2022-12-14 07:48:24,001 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/data/9ee20e641/0a9ebdf586104a528aec416ea6c402ed [2022-12-14 07:48:24,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:48:24,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:48:24,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:48:24,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:48:24,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:48:24,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:48:24" (1/1) ... [2022-12-14 07:48:24,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70dd523d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24, skipping insertion in model container [2022-12-14 07:48:24,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:48:24" (1/1) ... [2022-12-14 07:48:24,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:48:24,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:48:24,394 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_65528863-9288-4ed1-bfa8-6c7d71b3d97e/sv-benchmarks/c/eca-rers2012/Problem03_label35.c[53787,53800] [2022-12-14 07:48:24,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:48:24,438 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:48:24,620 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_65528863-9288-4ed1-bfa8-6c7d71b3d97e/sv-benchmarks/c/eca-rers2012/Problem03_label35.c[53787,53800] [2022-12-14 07:48:24,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:48:24,643 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:48:24,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24 WrapperNode [2022-12-14 07:48:24,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:48:24,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:48:24,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:48:24,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:48:24,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24" (1/1) ... [2022-12-14 07:48:24,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24" (1/1) ... [2022-12-14 07:48:24,740 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-12-14 07:48:24,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:48:24,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:48:24,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:48:24,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:48:24,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24" (1/1) ... [2022-12-14 07:48:24,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24" (1/1) ... [2022-12-14 07:48:24,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24" (1/1) ... [2022-12-14 07:48:24,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24" (1/1) ... [2022-12-14 07:48:24,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24" (1/1) ... [2022-12-14 07:48:24,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24" (1/1) ... [2022-12-14 07:48:24,805 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24" (1/1) ... [2022-12-14 07:48:24,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24" (1/1) ... [2022-12-14 07:48:24,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:48:24,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:48:24,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:48:24,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:48:24,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24" (1/1) ... [2022-12-14 07:48:24,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:48:24,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:48:24,841 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:48:24,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:48:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:48:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:48:24,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:48:24,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:48:24,932 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:48:24,934 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:48:26,276 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:48:26,458 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:48:26,458 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 07:48:26,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:48:26 BoogieIcfgContainer [2022-12-14 07:48:26,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:48:26,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:48:26,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:48:26,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:48:26,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:48:24" (1/3) ... [2022-12-14 07:48:26,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7079f9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:48:26, skipping insertion in model container [2022-12-14 07:48:26,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:48:24" (2/3) ... [2022-12-14 07:48:26,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7079f9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:48:26, skipping insertion in model container [2022-12-14 07:48:26,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:48:26" (3/3) ... [2022-12-14 07:48:26,466 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label35.c [2022-12-14 07:48:26,480 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:48:26,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:48:26,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:48:26,523 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;@43a6ac2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:48:26,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:48:26,528 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) [2022-12-14 07:48:26,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 07:48:26,538 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:26,539 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] [2022-12-14 07:48:26,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:26,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:26,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1725019044, now seen corresponding path program 1 times [2022-12-14 07:48:26,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:26,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59095967] [2022-12-14 07:48:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:26,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:27,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:27,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59095967] [2022-12-14 07:48:27,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59095967] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:27,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:27,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:48:27,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363359890] [2022-12-14 07:48:27,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:27,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:27,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:27,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:27,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:27,131 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) [2022-12-14 07:48:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:27,789 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-12-14 07:48:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:27,791 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 [2022-12-14 07:48:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:27,801 INFO L225 Difference]: With dead ends: 440 [2022-12-14 07:48:27,801 INFO L226 Difference]: Without dead ends: 289 [2022-12-14 07:48:27,804 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 [2022-12-14 07:48:27,806 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:27,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 51 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:48:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-12-14 07:48:27,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-12-14 07:48:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.7881944444444444) internal successors, (515), 288 states have internal predecessors, (515), 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) [2022-12-14 07:48:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 515 transitions. [2022-12-14 07:48:27,857 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 515 transitions. Word has length 143 [2022-12-14 07:48:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:27,857 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 515 transitions. [2022-12-14 07:48:27,858 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) [2022-12-14 07:48:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 515 transitions. [2022-12-14 07:48:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 07:48:27,861 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:27,861 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:27,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:48:27,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:27,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1817518075, now seen corresponding path program 1 times [2022-12-14 07:48:27,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:27,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875902495] [2022-12-14 07:48:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:27,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:28,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:28,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875902495] [2022-12-14 07:48:28,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875902495] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:28,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:28,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:48:28,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786229106] [2022-12-14 07:48:28,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:28,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:28,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:28,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:28,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:28,033 INFO L87 Difference]: Start difference. First operand 289 states and 515 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2022-12-14 07:48:28,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:28,584 INFO L93 Difference]: Finished difference Result 863 states and 1542 transitions. [2022-12-14 07:48:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:28,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 151 [2022-12-14 07:48:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:28,587 INFO L225 Difference]: With dead ends: 863 [2022-12-14 07:48:28,587 INFO L226 Difference]: Without dead ends: 575 [2022-12-14 07:48:28,588 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 [2022-12-14 07:48:28,589 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:28,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:48:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-12-14 07:48:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-12-14 07:48:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7421602787456445) internal successors, (1000), 574 states have internal predecessors, (1000), 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) [2022-12-14 07:48:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1000 transitions. [2022-12-14 07:48:28,618 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1000 transitions. Word has length 151 [2022-12-14 07:48:28,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:28,618 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1000 transitions. [2022-12-14 07:48:28,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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) [2022-12-14 07:48:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1000 transitions. [2022-12-14 07:48:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 07:48:28,622 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:28,623 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-12-14 07:48:28,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:48:28,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:28,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:28,624 INFO L85 PathProgramCache]: Analyzing trace with hash 732858334, now seen corresponding path program 1 times [2022-12-14 07:48:28,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:28,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544271310] [2022-12-14 07:48:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:28,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:28,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:28,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544271310] [2022-12-14 07:48:28,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544271310] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:48:28,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698830869] [2022-12-14 07:48:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:28,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:28,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:48:28,868 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:48:28,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:48:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:29,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:48:29,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:48:29,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:48:29,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698830869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:29,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:48:29,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 07:48:29,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575708191] [2022-12-14 07:48:29,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:29,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:29,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:48:29,200 INFO L87 Difference]: Start difference. First operand 575 states and 1000 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2022-12-14 07:48:29,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:29,781 INFO L93 Difference]: Finished difference Result 1721 states and 2997 transitions. [2022-12-14 07:48:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:29,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 158 [2022-12-14 07:48:29,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:29,788 INFO L225 Difference]: With dead ends: 1721 [2022-12-14 07:48:29,788 INFO L226 Difference]: Without dead ends: 1147 [2022-12-14 07:48:29,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:48:29,790 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 14 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:29,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 262 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:48:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-12-14 07:48:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2022-12-14 07:48:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.4773123909249564) internal successors, (1693), 1146 states have internal predecessors, (1693), 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) [2022-12-14 07:48:29,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1693 transitions. [2022-12-14 07:48:29,814 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1693 transitions. Word has length 158 [2022-12-14 07:48:29,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:29,814 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1693 transitions. [2022-12-14 07:48:29,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2022-12-14 07:48:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1693 transitions. [2022-12-14 07:48:29,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 07:48:29,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:29,817 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:29,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:48:30,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:30,018 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:30,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2058219657, now seen corresponding path program 1 times [2022-12-14 07:48:30,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:30,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317111942] [2022-12-14 07:48:30,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:30,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:30,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317111942] [2022-12-14 07:48:30,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317111942] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:30,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:30,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:48:30,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905185780] [2022-12-14 07:48:30,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:30,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:30,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:30,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:30,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:30,215 INFO L87 Difference]: Start difference. First operand 1147 states and 1693 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 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) [2022-12-14 07:48:30,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:30,853 INFO L93 Difference]: Finished difference Result 3439 states and 5077 transitions. [2022-12-14 07:48:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:30,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 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 166 [2022-12-14 07:48:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:30,860 INFO L225 Difference]: With dead ends: 3439 [2022-12-14 07:48:30,861 INFO L226 Difference]: Without dead ends: 2293 [2022-12-14 07:48:30,862 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 [2022-12-14 07:48:30,863 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 173 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:30,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 25 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:48:30,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2022-12-14 07:48:30,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2291. [2022-12-14 07:48:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.45764192139738) internal successors, (3338), 2290 states have internal predecessors, (3338), 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) [2022-12-14 07:48:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3338 transitions. [2022-12-14 07:48:30,920 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3338 transitions. Word has length 166 [2022-12-14 07:48:30,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:30,920 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3338 transitions. [2022-12-14 07:48:30,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 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) [2022-12-14 07:48:30,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3338 transitions. [2022-12-14 07:48:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 07:48:30,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:30,926 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:30,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:48:30,927 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:30,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:30,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1144854439, now seen corresponding path program 1 times [2022-12-14 07:48:30,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:30,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664564240] [2022-12-14 07:48:30,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:30,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:31,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:31,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664564240] [2022-12-14 07:48:31,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664564240] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:31,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:31,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:48:31,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419230298] [2022-12-14 07:48:31,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:31,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:31,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:31,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:31,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:31,103 INFO L87 Difference]: Start difference. First operand 2291 states and 3338 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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) [2022-12-14 07:48:31,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:31,640 INFO L93 Difference]: Finished difference Result 6869 states and 10011 transitions. [2022-12-14 07:48:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:31,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 169 [2022-12-14 07:48:31,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:31,655 INFO L225 Difference]: With dead ends: 6869 [2022-12-14 07:48:31,655 INFO L226 Difference]: Without dead ends: 4579 [2022-12-14 07:48:31,658 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 [2022-12-14 07:48:31,659 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 129 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:31,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 73 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:48:31,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2022-12-14 07:48:31,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4007. [2022-12-14 07:48:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 4006 states have (on average 1.4772840738891662) internal successors, (5918), 4006 states have internal predecessors, (5918), 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) [2022-12-14 07:48:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 5918 transitions. [2022-12-14 07:48:31,750 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 5918 transitions. Word has length 169 [2022-12-14 07:48:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:31,751 INFO L495 AbstractCegarLoop]: Abstraction has 4007 states and 5918 transitions. [2022-12-14 07:48:31,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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) [2022-12-14 07:48:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 5918 transitions. [2022-12-14 07:48:31,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 07:48:31,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:31,759 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:31,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:48:31,759 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:31,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:31,760 INFO L85 PathProgramCache]: Analyzing trace with hash 913133919, now seen corresponding path program 1 times [2022-12-14 07:48:31,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:31,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768069503] [2022-12-14 07:48:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:31,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 07:48:31,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:31,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768069503] [2022-12-14 07:48:31,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768069503] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:31,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:31,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:48:31,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081197953] [2022-12-14 07:48:31,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:31,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:31,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:31,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:31,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:31,869 INFO L87 Difference]: Start difference. First operand 4007 states and 5918 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2022-12-14 07:48:32,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:32,214 INFO L93 Difference]: Finished difference Result 8013 states and 11835 transitions. [2022-12-14 07:48:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:32,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 176 [2022-12-14 07:48:32,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:32,223 INFO L225 Difference]: With dead ends: 8013 [2022-12-14 07:48:32,223 INFO L226 Difference]: Without dead ends: 4007 [2022-12-14 07:48:32,226 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 [2022-12-14 07:48:32,226 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:32,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:48:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2022-12-14 07:48:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 4007. [2022-12-14 07:48:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 4006 states have (on average 1.4231153270094858) internal successors, (5701), 4006 states have internal predecessors, (5701), 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) [2022-12-14 07:48:32,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 5701 transitions. [2022-12-14 07:48:32,278 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 5701 transitions. Word has length 176 [2022-12-14 07:48:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:32,278 INFO L495 AbstractCegarLoop]: Abstraction has 4007 states and 5701 transitions. [2022-12-14 07:48:32,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2022-12-14 07:48:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 5701 transitions. [2022-12-14 07:48:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-12-14 07:48:32,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:32,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:32,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:48:32,283 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:32,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:32,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1881402799, now seen corresponding path program 1 times [2022-12-14 07:48:32,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:32,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485827214] [2022-12-14 07:48:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:32,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:48:32,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:32,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485827214] [2022-12-14 07:48:32,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485827214] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:32,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:32,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:48:32,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623899603] [2022-12-14 07:48:32,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:32,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:32,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:32,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:32,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:32,490 INFO L87 Difference]: Start difference. First operand 4007 states and 5701 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) [2022-12-14 07:48:33,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:33,066 INFO L93 Difference]: Finished difference Result 10875 states and 15672 transitions. [2022-12-14 07:48:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:33,066 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 177 [2022-12-14 07:48:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:33,079 INFO L225 Difference]: With dead ends: 10875 [2022-12-14 07:48:33,079 INFO L226 Difference]: Without dead ends: 6869 [2022-12-14 07:48:33,083 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 [2022-12-14 07:48:33,084 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 130 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:33,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 74 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:48:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6869 states. [2022-12-14 07:48:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6869 to 6724. [2022-12-14 07:48:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 1.4515841142347166) internal successors, (9759), 6723 states have internal predecessors, (9759), 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) [2022-12-14 07:48:33,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 9759 transitions. [2022-12-14 07:48:33,183 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 9759 transitions. Word has length 177 [2022-12-14 07:48:33,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:33,183 INFO L495 AbstractCegarLoop]: Abstraction has 6724 states and 9759 transitions. [2022-12-14 07:48:33,183 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) [2022-12-14 07:48:33,183 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 9759 transitions. [2022-12-14 07:48:33,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-12-14 07:48:33,189 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:33,189 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:33,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:48:33,189 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:33,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1380876940, now seen corresponding path program 1 times [2022-12-14 07:48:33,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:33,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257552224] [2022-12-14 07:48:33,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:33,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 07:48:33,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:33,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257552224] [2022-12-14 07:48:33,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257552224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:33,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:33,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:48:33,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97212412] [2022-12-14 07:48:33,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:33,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:33,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:33,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:33,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:33,455 INFO L87 Difference]: Start difference. First operand 6724 states and 9759 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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) [2022-12-14 07:48:34,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:34,067 INFO L93 Difference]: Finished difference Result 15449 states and 22407 transitions. [2022-12-14 07:48:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:34,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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 188 [2022-12-14 07:48:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:34,082 INFO L225 Difference]: With dead ends: 15449 [2022-12-14 07:48:34,082 INFO L226 Difference]: Without dead ends: 8726 [2022-12-14 07:48:34,086 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 [2022-12-14 07:48:34,086 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 128 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:34,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 80 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:48:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8726 states. [2022-12-14 07:48:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8726 to 8726. [2022-12-14 07:48:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8726 states, 8725 states have (on average 1.4239541547277936) internal successors, (12424), 8725 states have internal predecessors, (12424), 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) [2022-12-14 07:48:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8726 states to 8726 states and 12424 transitions. [2022-12-14 07:48:34,186 INFO L78 Accepts]: Start accepts. Automaton has 8726 states and 12424 transitions. Word has length 188 [2022-12-14 07:48:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:34,186 INFO L495 AbstractCegarLoop]: Abstraction has 8726 states and 12424 transitions. [2022-12-14 07:48:34,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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) [2022-12-14 07:48:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8726 states and 12424 transitions. [2022-12-14 07:48:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-12-14 07:48:34,193 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:34,193 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:34,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:48:34,194 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:34,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:34,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1717272169, now seen corresponding path program 1 times [2022-12-14 07:48:34,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:34,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792818326] [2022-12-14 07:48:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:34,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:48:34,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:34,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792818326] [2022-12-14 07:48:34,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792818326] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:34,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:34,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:48:34,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6270809] [2022-12-14 07:48:34,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:34,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:34,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:34,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:34,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:34,416 INFO L87 Difference]: Start difference. First operand 8726 states and 12424 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 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) [2022-12-14 07:48:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:34,949 INFO L93 Difference]: Finished difference Result 19169 states and 27103 transitions. [2022-12-14 07:48:34,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:34,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 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 188 [2022-12-14 07:48:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:34,964 INFO L225 Difference]: With dead ends: 19169 [2022-12-14 07:48:34,964 INFO L226 Difference]: Without dead ends: 10873 [2022-12-14 07:48:34,968 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 [2022-12-14 07:48:34,969 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 118 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:34,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 90 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:48:34,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10873 states. [2022-12-14 07:48:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10873 to 10871. [2022-12-14 07:48:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10871 states, 10870 states have (on average 1.3975160993560258) internal successors, (15191), 10870 states have internal predecessors, (15191), 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) [2022-12-14 07:48:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10871 states to 10871 states and 15191 transitions. [2022-12-14 07:48:35,081 INFO L78 Accepts]: Start accepts. Automaton has 10871 states and 15191 transitions. Word has length 188 [2022-12-14 07:48:35,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:35,081 INFO L495 AbstractCegarLoop]: Abstraction has 10871 states and 15191 transitions. [2022-12-14 07:48:35,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 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) [2022-12-14 07:48:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 10871 states and 15191 transitions. [2022-12-14 07:48:35,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-12-14 07:48:35,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:35,090 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:35,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:48:35,090 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:35,090 INFO L85 PathProgramCache]: Analyzing trace with hash -270902135, now seen corresponding path program 1 times [2022-12-14 07:48:35,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:35,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859716037] [2022-12-14 07:48:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:35,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 07:48:35,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:35,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859716037] [2022-12-14 07:48:35,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859716037] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:48:35,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817529973] [2022-12-14 07:48:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:35,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:35,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:48:35,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:48:35,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:48:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:35,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:48:35,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 07:48:35,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:48:35,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817529973] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:35,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:48:35,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-12-14 07:48:35,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13497721] [2022-12-14 07:48:35,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:35,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:35,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:35,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:35,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:48:35,546 INFO L87 Difference]: Start difference. First operand 10871 states and 15191 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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) [2022-12-14 07:48:36,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:36,219 INFO L93 Difference]: Finished difference Result 25602 states and 36922 transitions. [2022-12-14 07:48:36,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:36,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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 195 [2022-12-14 07:48:36,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:36,236 INFO L225 Difference]: With dead ends: 25602 [2022-12-14 07:48:36,236 INFO L226 Difference]: Without dead ends: 15161 [2022-12-14 07:48:36,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:48:36,244 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 136 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:36,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 85 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:48:36,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15161 states. [2022-12-14 07:48:36,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15161 to 15161. [2022-12-14 07:48:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15161 states, 15160 states have (on average 1.3180079155672824) internal successors, (19981), 15160 states have internal predecessors, (19981), 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) [2022-12-14 07:48:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 19981 transitions. [2022-12-14 07:48:36,412 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 19981 transitions. Word has length 195 [2022-12-14 07:48:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:36,412 INFO L495 AbstractCegarLoop]: Abstraction has 15161 states and 19981 transitions. [2022-12-14 07:48:36,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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) [2022-12-14 07:48:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 19981 transitions. [2022-12-14 07:48:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-12-14 07:48:36,419 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:36,419 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:36,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:48:36,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 07:48:36,620 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:36,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1222319198, now seen corresponding path program 1 times [2022-12-14 07:48:36,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:36,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026938350] [2022-12-14 07:48:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:36,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:36,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:36,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026938350] [2022-12-14 07:48:36,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026938350] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:36,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:36,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:48:36,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678575497] [2022-12-14 07:48:36,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:36,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:48:36,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:36,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:48:36,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:48:36,929 INFO L87 Difference]: Start difference. First operand 15161 states and 19981 transitions. Second operand has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 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) [2022-12-14 07:48:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:38,017 INFO L93 Difference]: Finished difference Result 34754 states and 45409 transitions. [2022-12-14 07:48:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:48:38,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 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 213 [2022-12-14 07:48:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:38,037 INFO L225 Difference]: With dead ends: 34754 [2022-12-14 07:48:38,037 INFO L226 Difference]: Without dead ends: 20309 [2022-12-14 07:48:38,046 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 [2022-12-14 07:48:38,046 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 220 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:38,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 105 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 07:48:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20309 states. [2022-12-14 07:48:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20309 to 18879. [2022-12-14 07:48:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18879 states, 18878 states have (on average 1.2822862591376205) internal successors, (24207), 18878 states have internal predecessors, (24207), 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) [2022-12-14 07:48:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18879 states to 18879 states and 24207 transitions. [2022-12-14 07:48:38,249 INFO L78 Accepts]: Start accepts. Automaton has 18879 states and 24207 transitions. Word has length 213 [2022-12-14 07:48:38,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:38,249 INFO L495 AbstractCegarLoop]: Abstraction has 18879 states and 24207 transitions. [2022-12-14 07:48:38,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.25) internal successors, (213), 3 states have internal predecessors, (213), 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) [2022-12-14 07:48:38,249 INFO L276 IsEmpty]: Start isEmpty. Operand 18879 states and 24207 transitions. [2022-12-14 07:48:38,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-12-14 07:48:38,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:38,257 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 07:48:38,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 07:48:38,258 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:38,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:38,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1791175464, now seen corresponding path program 1 times [2022-12-14 07:48:38,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:38,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150435301] [2022-12-14 07:48:38,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:38,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:38,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:38,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150435301] [2022-12-14 07:48:38,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150435301] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:38,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:38,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:48:38,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493497116] [2022-12-14 07:48:38,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:38,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:38,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:38,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:38,647 INFO L87 Difference]: Start difference. First operand 18879 states and 24207 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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) [2022-12-14 07:48:39,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:39,106 INFO L93 Difference]: Finished difference Result 37042 states and 47629 transitions. [2022-12-14 07:48:39,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:39,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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 217 [2022-12-14 07:48:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:39,125 INFO L225 Difference]: With dead ends: 37042 [2022-12-14 07:48:39,125 INFO L226 Difference]: Without dead ends: 19022 [2022-12-14 07:48:39,134 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 [2022-12-14 07:48:39,134 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:39,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 107 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:48:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19022 states. [2022-12-14 07:48:39,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19022 to 19022. [2022-12-14 07:48:39,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19022 states, 19021 states have (on average 1.281636086430787) internal successors, (24378), 19021 states have internal predecessors, (24378), 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) [2022-12-14 07:48:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19022 states to 19022 states and 24378 transitions. [2022-12-14 07:48:39,343 INFO L78 Accepts]: Start accepts. Automaton has 19022 states and 24378 transitions. Word has length 217 [2022-12-14 07:48:39,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:39,344 INFO L495 AbstractCegarLoop]: Abstraction has 19022 states and 24378 transitions. [2022-12-14 07:48:39,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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) [2022-12-14 07:48:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 19022 states and 24378 transitions. [2022-12-14 07:48:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-12-14 07:48:39,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:39,355 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, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 07:48:39,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 07:48:39,355 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:39,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:39,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1609721934, now seen corresponding path program 1 times [2022-12-14 07:48:39,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:39,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645123229] [2022-12-14 07:48:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:39,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 07:48:39,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:39,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645123229] [2022-12-14 07:48:39,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645123229] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:39,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:39,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:48:39,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580738174] [2022-12-14 07:48:39,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:39,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:39,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:39,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:39,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:39,625 INFO L87 Difference]: Start difference. First operand 19022 states and 24378 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) [2022-12-14 07:48:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:40,085 INFO L93 Difference]: Finished difference Result 39046 states and 49970 transitions. [2022-12-14 07:48:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:40,086 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 240 [2022-12-14 07:48:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:40,103 INFO L225 Difference]: With dead ends: 39046 [2022-12-14 07:48:40,103 INFO L226 Difference]: Without dead ends: 21169 [2022-12-14 07:48:40,112 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 [2022-12-14 07:48:40,112 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 121 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:40,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 108 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:48:40,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21169 states. [2022-12-14 07:48:40,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21169 to 21024. [2022-12-14 07:48:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21024 states, 21023 states have (on average 1.2694667744850878) internal successors, (26688), 21023 states have internal predecessors, (26688), 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) [2022-12-14 07:48:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21024 states to 21024 states and 26688 transitions. [2022-12-14 07:48:40,315 INFO L78 Accepts]: Start accepts. Automaton has 21024 states and 26688 transitions. Word has length 240 [2022-12-14 07:48:40,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:40,316 INFO L495 AbstractCegarLoop]: Abstraction has 21024 states and 26688 transitions. [2022-12-14 07:48:40,316 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) [2022-12-14 07:48:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 21024 states and 26688 transitions. [2022-12-14 07:48:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-12-14 07:48:40,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:40,325 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:40,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 07:48:40,325 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:40,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1043367287, now seen corresponding path program 1 times [2022-12-14 07:48:40,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:40,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69381053] [2022-12-14 07:48:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:40,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 07:48:40,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:40,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69381053] [2022-12-14 07:48:40,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69381053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:40,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:40,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:48:40,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505782601] [2022-12-14 07:48:40,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:40,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:48:40,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:40,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:48:40,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:48:40,539 INFO L87 Difference]: Start difference. First operand 21024 states and 26688 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 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) [2022-12-14 07:48:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:41,153 INFO L93 Difference]: Finished difference Result 47052 states and 60366 transitions. [2022-12-14 07:48:41,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:48:41,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 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 241 [2022-12-14 07:48:41,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:41,181 INFO L225 Difference]: With dead ends: 47052 [2022-12-14 07:48:41,181 INFO L226 Difference]: Without dead ends: 27173 [2022-12-14 07:48:41,194 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 [2022-12-14 07:48:41,194 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 318 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:41,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 10 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:48:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27173 states. [2022-12-14 07:48:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27173 to 26601. [2022-12-14 07:48:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26601 states, 26600 states have (on average 1.2143233082706766) internal successors, (32301), 26600 states have internal predecessors, (32301), 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) [2022-12-14 07:48:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26601 states to 26601 states and 32301 transitions. [2022-12-14 07:48:41,577 INFO L78 Accepts]: Start accepts. Automaton has 26601 states and 32301 transitions. Word has length 241 [2022-12-14 07:48:41,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:41,577 INFO L495 AbstractCegarLoop]: Abstraction has 26601 states and 32301 transitions. [2022-12-14 07:48:41,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 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) [2022-12-14 07:48:41,577 INFO L276 IsEmpty]: Start isEmpty. Operand 26601 states and 32301 transitions. [2022-12-14 07:48:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-12-14 07:48:41,588 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:41,588 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] [2022-12-14 07:48:41,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 07:48:41,588 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:41,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:41,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2004547867, now seen corresponding path program 1 times [2022-12-14 07:48:41,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:41,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176362345] [2022-12-14 07:48:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:41,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 99 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:41,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:41,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176362345] [2022-12-14 07:48:41,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176362345] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:48:41,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100074569] [2022-12-14 07:48:41,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:41,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:41,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:48:41,900 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:48:41,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:48:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:42,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:48:42,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:48:42,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:48:42,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100074569] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:42,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:48:42,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 07:48:42,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727158151] [2022-12-14 07:48:42,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:42,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:42,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:42,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:42,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:48:42,160 INFO L87 Difference]: Start difference. First operand 26601 states and 32301 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) [2022-12-14 07:48:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:42,679 INFO L93 Difference]: Finished difference Result 50055 states and 61609 transitions. [2022-12-14 07:48:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:42,680 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 [2022-12-14 07:48:42,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:42,702 INFO L225 Difference]: With dead ends: 50055 [2022-12-14 07:48:42,702 INFO L226 Difference]: Without dead ends: 27602 [2022-12-14 07:48:42,711 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 [2022-12-14 07:48:42,711 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:42,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 187 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:48:42,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27602 states. [2022-12-14 07:48:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27602 to 27602. [2022-12-14 07:48:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27602 states, 27601 states have (on average 1.2183254229919205) internal successors, (33627), 27601 states have internal predecessors, (33627), 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) [2022-12-14 07:48:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27602 states to 27602 states and 33627 transitions. [2022-12-14 07:48:43,017 INFO L78 Accepts]: Start accepts. Automaton has 27602 states and 33627 transitions. Word has length 243 [2022-12-14 07:48:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:43,018 INFO L495 AbstractCegarLoop]: Abstraction has 27602 states and 33627 transitions. [2022-12-14 07:48:43,018 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) [2022-12-14 07:48:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 27602 states and 33627 transitions. [2022-12-14 07:48:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-12-14 07:48:43,036 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:43,036 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-12-14 07:48:43,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:48:43,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:43,238 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:43,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:43,239 INFO L85 PathProgramCache]: Analyzing trace with hash 695708624, now seen corresponding path program 1 times [2022-12-14 07:48:43,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:43,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903326653] [2022-12-14 07:48:43,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:43,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 120 proven. 6 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-12-14 07:48:43,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:43,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903326653] [2022-12-14 07:48:43,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903326653] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:48:43,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966657185] [2022-12-14 07:48:43,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:43,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:43,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:48:43,612 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:48:43,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:48:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:43,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:48:43,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-14 07:48:43,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:48:43,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966657185] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:43,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:48:43,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 07:48:43,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340834593] [2022-12-14 07:48:43,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:43,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:43,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:43,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:43,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:48:43,838 INFO L87 Difference]: Start difference. First operand 27602 states and 33627 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 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) [2022-12-14 07:48:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:44,464 INFO L93 Difference]: Finished difference Result 54345 states and 67280 transitions. [2022-12-14 07:48:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:44,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 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 261 [2022-12-14 07:48:44,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:44,487 INFO L225 Difference]: With dead ends: 54345 [2022-12-14 07:48:44,487 INFO L226 Difference]: Without dead ends: 27745 [2022-12-14 07:48:44,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:48:44,498 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 144 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:44,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 55 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:48:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27745 states. [2022-12-14 07:48:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27745 to 24599. [2022-12-14 07:48:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24599 states, 24598 states have (on average 1.2347345312627043) internal successors, (30372), 24598 states have internal predecessors, (30372), 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) [2022-12-14 07:48:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24599 states to 24599 states and 30372 transitions. [2022-12-14 07:48:44,779 INFO L78 Accepts]: Start accepts. Automaton has 24599 states and 30372 transitions. Word has length 261 [2022-12-14 07:48:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:44,779 INFO L495 AbstractCegarLoop]: Abstraction has 24599 states and 30372 transitions. [2022-12-14 07:48:44,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 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) [2022-12-14 07:48:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 24599 states and 30372 transitions. [2022-12-14 07:48:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-12-14 07:48:44,791 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:44,791 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 07:48:44,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:48:44,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 07:48:44,993 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:44,995 INFO L85 PathProgramCache]: Analyzing trace with hash -295901758, now seen corresponding path program 1 times [2022-12-14 07:48:44,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:44,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394322766] [2022-12-14 07:48:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:44,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:45,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:45,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394322766] [2022-12-14 07:48:45,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394322766] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:45,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:45,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:48:45,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094490575] [2022-12-14 07:48:45,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:45,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:45,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:45,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:45,179 INFO L87 Difference]: Start difference. First operand 24599 states and 30372 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2022-12-14 07:48:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:45,704 INFO L93 Difference]: Finished difference Result 49197 states and 60745 transitions. [2022-12-14 07:48:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:45,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 262 [2022-12-14 07:48:45,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:45,727 INFO L225 Difference]: With dead ends: 49197 [2022-12-14 07:48:45,727 INFO L226 Difference]: Without dead ends: 25457 [2022-12-14 07:48:45,737 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 [2022-12-14 07:48:45,738 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 149 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:45,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 201 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:48:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25457 states. [2022-12-14 07:48:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25457 to 23884. [2022-12-14 07:48:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23884 states, 23883 states have (on average 1.1984256584181217) internal successors, (28622), 23883 states have internal predecessors, (28622), 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) [2022-12-14 07:48:46,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23884 states to 23884 states and 28622 transitions. [2022-12-14 07:48:46,015 INFO L78 Accepts]: Start accepts. Automaton has 23884 states and 28622 transitions. Word has length 262 [2022-12-14 07:48:46,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:46,016 INFO L495 AbstractCegarLoop]: Abstraction has 23884 states and 28622 transitions. [2022-12-14 07:48:46,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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) [2022-12-14 07:48:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 23884 states and 28622 transitions. [2022-12-14 07:48:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-12-14 07:48:46,028 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:46,028 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 07:48:46,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 07:48:46,029 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:46,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:46,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1206139544, now seen corresponding path program 1 times [2022-12-14 07:48:46,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:46,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783730336] [2022-12-14 07:48:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:46,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-12-14 07:48:46,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:46,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783730336] [2022-12-14 07:48:46,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783730336] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:46,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:46,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:48:46,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966365752] [2022-12-14 07:48:46,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:46,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:46,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:46,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:46,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:46,313 INFO L87 Difference]: Start difference. First operand 23884 states and 28622 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2022-12-14 07:48:46,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:46,941 INFO L93 Difference]: Finished difference Result 51628 states and 61733 transitions. [2022-12-14 07:48:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:46,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 295 [2022-12-14 07:48:46,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:46,969 INFO L225 Difference]: With dead ends: 51628 [2022-12-14 07:48:46,969 INFO L226 Difference]: Without dead ends: 28746 [2022-12-14 07:48:46,981 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 [2022-12-14 07:48:46,982 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 133 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:46,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 84 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:48:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28746 states. [2022-12-14 07:48:47,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28746 to 28746. [2022-12-14 07:48:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28746 states, 28745 states have (on average 1.185353974604279) internal successors, (34073), 28745 states have internal predecessors, (34073), 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) [2022-12-14 07:48:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28746 states to 28746 states and 34073 transitions. [2022-12-14 07:48:47,422 INFO L78 Accepts]: Start accepts. Automaton has 28746 states and 34073 transitions. Word has length 295 [2022-12-14 07:48:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:47,422 INFO L495 AbstractCegarLoop]: Abstraction has 28746 states and 34073 transitions. [2022-12-14 07:48:47,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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) [2022-12-14 07:48:47,423 INFO L276 IsEmpty]: Start isEmpty. Operand 28746 states and 34073 transitions. [2022-12-14 07:48:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-12-14 07:48:47,443 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:47,444 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:47,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 07:48:47,444 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:47,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:47,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1478207851, now seen corresponding path program 1 times [2022-12-14 07:48:47,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:47,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297639487] [2022-12-14 07:48:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:47,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 07:48:47,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:47,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297639487] [2022-12-14 07:48:47,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297639487] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:47,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:47,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:48:47,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900854953] [2022-12-14 07:48:47,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:47,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:47,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:47,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:47,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:47,655 INFO L87 Difference]: Start difference. First operand 28746 states and 34073 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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) [2022-12-14 07:48:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:48,306 INFO L93 Difference]: Finished difference Result 59350 states and 70573 transitions. [2022-12-14 07:48:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:48,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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 296 [2022-12-14 07:48:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:48,333 INFO L225 Difference]: With dead ends: 59350 [2022-12-14 07:48:48,334 INFO L226 Difference]: Without dead ends: 32464 [2022-12-14 07:48:48,343 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 [2022-12-14 07:48:48,344 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 135 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:48,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 225 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:48:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32464 states. [2022-12-14 07:48:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32464 to 31606. [2022-12-14 07:48:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31606 states, 31605 states have (on average 1.178294573643411) internal successors, (37240), 31605 states have internal predecessors, (37240), 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) [2022-12-14 07:48:48,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31606 states to 31606 states and 37240 transitions. [2022-12-14 07:48:48,665 INFO L78 Accepts]: Start accepts. Automaton has 31606 states and 37240 transitions. Word has length 296 [2022-12-14 07:48:48,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:48,666 INFO L495 AbstractCegarLoop]: Abstraction has 31606 states and 37240 transitions. [2022-12-14 07:48:48,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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) [2022-12-14 07:48:48,666 INFO L276 IsEmpty]: Start isEmpty. Operand 31606 states and 37240 transitions. [2022-12-14 07:48:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-12-14 07:48:48,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:48,681 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 07:48:48,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 07:48:48,682 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:48,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:48,682 INFO L85 PathProgramCache]: Analyzing trace with hash 960917258, now seen corresponding path program 1 times [2022-12-14 07:48:48,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:48,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864646235] [2022-12-14 07:48:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:48,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 173 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-14 07:48:49,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:49,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864646235] [2022-12-14 07:48:49,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864646235] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:48:49,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427132583] [2022-12-14 07:48:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:49,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:49,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:48:49,027 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:48:49,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:48:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:49,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:48:49,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-12-14 07:48:49,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:48:49,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427132583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:49,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:48:49,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 07:48:49,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665425284] [2022-12-14 07:48:49,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:49,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:49,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:49,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:49,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:48:49,313 INFO L87 Difference]: Start difference. First operand 31606 states and 37240 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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) [2022-12-14 07:48:50,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:50,007 INFO L93 Difference]: Finished difference Result 63497 states and 74837 transitions. [2022-12-14 07:48:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:50,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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 311 [2022-12-14 07:48:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:50,033 INFO L225 Difference]: With dead ends: 63497 [2022-12-14 07:48:50,033 INFO L226 Difference]: Without dead ends: 32178 [2022-12-14 07:48:50,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:48:50,044 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:50,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 245 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:48:50,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32178 states. [2022-12-14 07:48:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32178 to 32178. [2022-12-14 07:48:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32178 states, 32177 states have (on average 1.1728563881033036) internal successors, (37739), 32177 states have internal predecessors, (37739), 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) [2022-12-14 07:48:50,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32178 states to 32178 states and 37739 transitions. [2022-12-14 07:48:50,375 INFO L78 Accepts]: Start accepts. Automaton has 32178 states and 37739 transitions. Word has length 311 [2022-12-14 07:48:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:50,375 INFO L495 AbstractCegarLoop]: Abstraction has 32178 states and 37739 transitions. [2022-12-14 07:48:50,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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) [2022-12-14 07:48:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 32178 states and 37739 transitions. [2022-12-14 07:48:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-12-14 07:48:50,391 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:50,392 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 07:48:50,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 07:48:50,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:50,594 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:50,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1322166560, now seen corresponding path program 1 times [2022-12-14 07:48:50,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:50,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740960124] [2022-12-14 07:48:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:50,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 169 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:51,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:51,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740960124] [2022-12-14 07:48:51,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740960124] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:48:51,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369845193] [2022-12-14 07:48:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:51,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:51,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:48:51,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:48:51,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:48:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:51,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 07:48:51,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:51,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:48:51,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369845193] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:51,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:48:51,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2022-12-14 07:48:51,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391782439] [2022-12-14 07:48:51,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:51,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:48:51,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:48:51,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:48:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:48:51,862 INFO L87 Difference]: Start difference. First operand 32178 states and 37739 transitions. Second operand has 5 states, 5 states have (on average 62.6) internal successors, (313), 4 states have internal predecessors, (313), 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) [2022-12-14 07:48:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:52,968 INFO L93 Difference]: Finished difference Result 105829 states and 123722 transitions. [2022-12-14 07:48:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:48:52,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 62.6) internal successors, (313), 4 states have internal predecessors, (313), 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 313 [2022-12-14 07:48:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:53,037 INFO L225 Difference]: With dead ends: 105829 [2022-12-14 07:48:53,037 INFO L226 Difference]: Without dead ends: 75654 [2022-12-14 07:48:53,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:48:53,059 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 478 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:53,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 394 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:48:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75654 states. [2022-12-14 07:48:53,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75654 to 75078. [2022-12-14 07:48:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75078 states, 75077 states have (on average 1.1626863087230443) internal successors, (87291), 75077 states have internal predecessors, (87291), 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) [2022-12-14 07:48:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75078 states to 75078 states and 87291 transitions. [2022-12-14 07:48:54,115 INFO L78 Accepts]: Start accepts. Automaton has 75078 states and 87291 transitions. Word has length 313 [2022-12-14 07:48:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:54,116 INFO L495 AbstractCegarLoop]: Abstraction has 75078 states and 87291 transitions. [2022-12-14 07:48:54,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.6) internal successors, (313), 4 states have internal predecessors, (313), 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) [2022-12-14 07:48:54,116 INFO L276 IsEmpty]: Start isEmpty. Operand 75078 states and 87291 transitions. [2022-12-14 07:48:54,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-12-14 07:48:54,146 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:54,147 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:54,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:48:54,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:54,349 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:48:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:54,350 INFO L85 PathProgramCache]: Analyzing trace with hash -129311690, now seen corresponding path program 1 times [2022-12-14 07:48:54,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:48:54,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769721385] [2022-12-14 07:48:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:54,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:48:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 196 proven. 3 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-12-14 07:48:54,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:48:54,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769721385] [2022-12-14 07:48:54,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769721385] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:48:54,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722465789] [2022-12-14 07:48:54,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:54,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:54,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:48:54,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:48:54,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:48:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:54,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:48:54,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 190 proven. 87 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 07:48:55,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:48:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 190 proven. 87 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 07:48:55,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722465789] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:48:55,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1992203259] [2022-12-14 07:48:55,316 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 07:48:55,316 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:48:55,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:48:55,323 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:48:55,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:55:48,167 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:56:11,312 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1088840#(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) (<= 0 ~a19~0) (<= |#NULL.offset| 0) (<= ~v~0 22) (<= ~a15~0 1) (<= ~a22~0 1) (<= 1 |ULTIMATE.start_main_~input~0#1|) (= ~a11~0 1) (<= ~a~0 1) (<= 4 ~d~0) (<= 23 ~w~0) (<= ~a17~0 0) (<= ~a23~0 0) (<= ~a24~0 1) (<= ~z~0 26) (<= 21 ~u~0) (<= 2 ~b~0) (= ~a3~0 1) (<= 0 (+ |ULTIMATE.start_main_~output~0#1| 1)) (<= 1 |ULTIMATE.start_calculate_output_#in~input#1|) (= ~a6~0 1) (not (= ~a12~0 1)) (<= 1 ~a9~0) (<= |#NULL.base| 0) (<= ~a8~0 0) (<= ~a14~0 0) (<= 1 ~a29~0) (<= ~y~0 25) (<= 1 ~a13~0) (<= 1 ~a28~0) (<= 1 ~a~0) (= ~a27~0 1) (<= 22 ~v~0) (<= 1 ~a10~0) (<= 0 ~a2~0) (<= 1 ~a15~0) (<= 0 |#NULL.offset|) (<= ~d~0 4) (<= 0 |#StackHeapBarrier|) (= ~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 [2022-12-14 07:56:11,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:56:11,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:56:11,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 07:56:11,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065955520] [2022-12-14 07:56:11,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:56:11,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:56:11,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:56:11,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:56:11,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:56:11,314 INFO L87 Difference]: Start difference. First operand 75078 states and 87291 transitions. Second operand has 7 states, 7 states have (on average 69.28571428571429) internal successors, (485), 6 states have internal predecessors, (485), 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) [2022-12-14 07:56:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:56:16,208 INFO L93 Difference]: Finished difference Result 299594 states and 350463 transitions. [2022-12-14 07:56:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 07:56:16,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 69.28571428571429) internal successors, (485), 6 states have internal predecessors, (485), 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 [2022-12-14 07:56:16,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:56:16,441 INFO L225 Difference]: With dead ends: 299594 [2022-12-14 07:56:16,441 INFO L226 Difference]: Without dead ends: 213220 [2022-12-14 07:56:16,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 680 SyntacticMatches, 313 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-12-14 07:56:16,486 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2256 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 3983 mSolverCounterSat, 964 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2256 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 4947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 964 IncrementalHoareTripleChecker+Valid, 3983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:56:16,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2256 Valid, 266 Invalid, 4947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [964 Valid, 3983 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 07:56:16,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213220 states. [2022-12-14 07:56:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213220 to 125843. [2022-12-14 07:56:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125843 states, 125842 states have (on average 1.1148662608668012) internal successors, (140297), 125842 states have internal predecessors, (140297), 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) [2022-12-14 07:56:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125843 states to 125843 states and 140297 transitions. [2022-12-14 07:56:18,625 INFO L78 Accepts]: Start accepts. Automaton has 125843 states and 140297 transitions. Word has length 334 [2022-12-14 07:56:18,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:56:18,626 INFO L495 AbstractCegarLoop]: Abstraction has 125843 states and 140297 transitions. [2022-12-14 07:56:18,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.28571428571429) internal successors, (485), 6 states have internal predecessors, (485), 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) [2022-12-14 07:56:18,626 INFO L276 IsEmpty]: Start isEmpty. Operand 125843 states and 140297 transitions. [2022-12-14 07:56:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-12-14 07:56:18,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:56:18,656 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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] [2022-12-14 07:56:18,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:56:18,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:56:18,857 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:56:18,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:56:18,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1444833683, now seen corresponding path program 1 times [2022-12-14 07:56:18,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:56:18,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313897919] [2022-12-14 07:56:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:56:18,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:56:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:56:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 07:56:19,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:56:19,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313897919] [2022-12-14 07:56:19,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313897919] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:56:19,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:56:19,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:56:19,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108546468] [2022-12-14 07:56:19,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:56:19,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:56:19,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:56:19,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:56:19,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:56:19,266 INFO L87 Difference]: Start difference. First operand 125843 states and 140297 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 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) [2022-12-14 07:56:20,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:56:20,382 INFO L93 Difference]: Finished difference Result 281572 states and 314354 transitions. [2022-12-14 07:56:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:56:20,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 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 350 [2022-12-14 07:56:20,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:56:20,543 INFO L225 Difference]: With dead ends: 281572 [2022-12-14 07:56:20,543 INFO L226 Difference]: Without dead ends: 157160 [2022-12-14 07:56:20,678 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 [2022-12-14 07:56:20,679 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:56:20,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 52 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:56:20,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157160 states. [2022-12-14 07:56:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157160 to 155587. [2022-12-14 07:56:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155587 states, 155586 states have (on average 1.1116809995757972) internal successors, (172962), 155586 states have internal predecessors, (172962), 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) [2022-12-14 07:56:22,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155587 states to 155587 states and 172962 transitions. [2022-12-14 07:56:22,765 INFO L78 Accepts]: Start accepts. Automaton has 155587 states and 172962 transitions. Word has length 350 [2022-12-14 07:56:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:56:22,765 INFO L495 AbstractCegarLoop]: Abstraction has 155587 states and 172962 transitions. [2022-12-14 07:56:22,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 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) [2022-12-14 07:56:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 155587 states and 172962 transitions. [2022-12-14 07:56:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-12-14 07:56:22,810 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:56:22,811 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 07:56:22,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 07:56:22,811 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:56:22,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:56:22,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1324258017, now seen corresponding path program 1 times [2022-12-14 07:56:22,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:56:22,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145975192] [2022-12-14 07:56:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:56:22,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:56:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:56:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 291 proven. 123 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 07:56:23,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:56:23,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145975192] [2022-12-14 07:56:23,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145975192] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:56:23,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78398088] [2022-12-14 07:56:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:56:23,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:56:23,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:56:23,640 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:56:23,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65528863-9288-4ed1-bfa8-6c7d71b3d97e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:56:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:56:23,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:56:23,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:56:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 272 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-14 07:56:23,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:56:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 272 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-14 07:56:24,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78398088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:56:24,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1477876579] [2022-12-14 07:56:24,030 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-12-14 07:56:24,030 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:56:24,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:56:24,031 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:56:24,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs