./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9 --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 7f7a5a1c3d43a07fad050d83cae91745968fcd759f4b97582e892f295162805b --- 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-6b4ec56 [2022-11-20 21:08:52,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:08:52,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:08:52,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:08:52,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:08:52,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:08:52,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:08:52,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:08:52,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:08:52,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:08:52,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:08:52,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:08:52,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:08:52,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:08:52,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:08:52,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:08:52,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:08:52,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:08:52,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:08:52,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:08:52,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:08:52,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:08:52,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:08:52,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:08:52,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:08:52,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:08:52,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:08:52,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:08:52,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:08:52,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:08:52,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:08:52,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:08:52,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:08:52,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:08:52,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:08:52,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:08:52,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:08:52,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:08:52,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:08:52,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:08:52,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:08:52,898 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:08:52,953 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:08:52,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:08:52,954 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:08:52,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:08:52,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:08:52,955 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:08:52,955 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:08:52,955 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:08:52,955 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:08:52,955 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:08:52,955 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:08:52,956 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:08:52,956 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:08:52,956 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:08:52,956 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:08:52,956 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:08:52,957 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:08:52,957 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:08:52,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:08:52,958 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:08:52,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:08:52,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:08:52,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:08:52,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:08:52,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:08:52,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:08:52,969 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:08:52,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:08:52,969 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:08:52,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:08:52,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:08:52,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:08:52,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:08:52,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:08:52,971 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:08:52,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:08:52,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:08:52,973 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:08:52,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:08:52,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:08:52,974 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:08:52,974 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_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f7a5a1c3d43a07fad050d83cae91745968fcd759f4b97582e892f295162805b [2022-11-20 21:08:53,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:08:53,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:08:53,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:08:53,235 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:08:53,235 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:08:53,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-20 21:08:56,343 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:08:56,616 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:08:56,617 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-20 21:08:56,626 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/data/1600768a9/cdfb7dd4267c4823a158d3770a69f27f/FLAG9795bfc00 [2022-11-20 21:08:56,642 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/data/1600768a9/cdfb7dd4267c4823a158d3770a69f27f [2022-11-20 21:08:56,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:08:56,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:08:56,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:08:56,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:08:56,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:08:56,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:08:56" (1/1) ... [2022-11-20 21:08:56,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42859f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:56, skipping insertion in model container [2022-11-20 21:08:56,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:08:56" (1/1) ... [2022-11-20 21:08:56,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:08:56,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:08:56,930 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_ff69167c-875d-4e0d-8ef6-8b829c6f766d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5805,5818] [2022-11-20 21:08:56,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:08:56,985 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:08:57,027 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_ff69167c-875d-4e0d-8ef6-8b829c6f766d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5805,5818] [2022-11-20 21:08:57,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:08:57,062 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:08:57,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:57 WrapperNode [2022-11-20 21:08:57,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:08:57,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:08:57,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:08:57,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:08:57,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:57" (1/1) ... [2022-11-20 21:08:57,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:57" (1/1) ... [2022-11-20 21:08:57,127 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 413 [2022-11-20 21:08:57,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:08:57,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:08:57,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:08:57,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:08:57,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:57" (1/1) ... [2022-11-20 21:08:57,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:57" (1/1) ... [2022-11-20 21:08:57,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:57" (1/1) ... [2022-11-20 21:08:57,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:57" (1/1) ... [2022-11-20 21:08:57,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:57" (1/1) ... [2022-11-20 21:08:57,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:57" (1/1) ... [2022-11-20 21:08:57,158 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:57" (1/1) ... [2022-11-20 21:08:57,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:57" (1/1) ... [2022-11-20 21:08:57,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:08:57,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:08:57,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:08:57,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:08:57,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:57" (1/1) ... [2022-11-20 21:08:57,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:08:57,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:08:57,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:08:57,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:08:57,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:08:57,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:08:57,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:08:57,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:08:57,368 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:08:57,370 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:08:57,969 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:08:58,099 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:08:58,099 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 21:08:58,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:08:58 BoogieIcfgContainer [2022-11-20 21:08:58,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:08:58,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:08:58,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:08:58,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:08:58,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:08:56" (1/3) ... [2022-11-20 21:08:58,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5620b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:08:58, skipping insertion in model container [2022-11-20 21:08:58,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:08:57" (2/3) ... [2022-11-20 21:08:58,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5620b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:08:58, skipping insertion in model container [2022-11-20 21:08:58,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:08:58" (3/3) ... [2022-11-20 21:08:58,111 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-20 21:08:58,138 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:08:58,138 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:08:58,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:08:58,222 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;@5e5c1347, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:08:58,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:08:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 72 states have (on average 1.7222222222222223) internal successors, (124), 73 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 21:08:58,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:08:58,241 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] [2022-11-20 21:08:58,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:08:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:08:58,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1248708535, now seen corresponding path program 1 times [2022-11-20 21:08:58,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:08:58,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071037286] [2022-11-20 21:08:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:08:58,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:08:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:08:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:08:58,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:08:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071037286] [2022-11-20 21:08:58,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071037286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:08:58,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:08:58,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:08:58,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965222052] [2022-11-20 21:08:58,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:08:58,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:08:58,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:08:58,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:08:58,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:08:58,817 INFO L87 Difference]: Start difference. First operand has 74 states, 72 states have (on average 1.7222222222222223) internal successors, (124), 73 states have internal predecessors, (124), 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 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:08:58,939 INFO L93 Difference]: Finished difference Result 152 states and 236 transitions. [2022-11-20 21:08:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:08:58,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2022-11-20 21:08:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:08:58,951 INFO L225 Difference]: With dead ends: 152 [2022-11-20 21:08:58,951 INFO L226 Difference]: Without dead ends: 107 [2022-11-20 21:08:58,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:08:58,956 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 82 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:08:58,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 209 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:08:58,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-20 21:08:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2022-11-20 21:08:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.3365384615384615) internal successors, (139), 104 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 139 transitions. [2022-11-20 21:08:59,007 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 139 transitions. Word has length 48 [2022-11-20 21:08:59,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:08:59,007 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 139 transitions. [2022-11-20 21:08:59,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:59,008 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 139 transitions. [2022-11-20 21:08:59,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 21:08:59,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:08:59,010 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] [2022-11-20 21:08:59,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:08:59,010 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:08:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:08:59,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2036715381, now seen corresponding path program 1 times [2022-11-20 21:08:59,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:08:59,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503993441] [2022-11-20 21:08:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:08:59,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:08:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:08:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:08:59,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:08:59,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503993441] [2022-11-20 21:08:59,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503993441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:08:59,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:08:59,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:08:59,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624187247] [2022-11-20 21:08:59,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:08:59,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:08:59,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:08:59,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:08:59,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:08:59,184 INFO L87 Difference]: Start difference. First operand 105 states and 139 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:08:59,263 INFO L93 Difference]: Finished difference Result 241 states and 339 transitions. [2022-11-20 21:08:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:08:59,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 51 [2022-11-20 21:08:59,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:08:59,265 INFO L225 Difference]: With dead ends: 241 [2022-11-20 21:08:59,266 INFO L226 Difference]: Without dead ends: 169 [2022-11-20 21:08:59,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:08:59,276 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 49 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:08:59,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 169 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:08:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-20 21:08:59,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2022-11-20 21:08:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.3855421686746987) internal successors, (230), 166 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 230 transitions. [2022-11-20 21:08:59,330 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 230 transitions. Word has length 51 [2022-11-20 21:08:59,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:08:59,331 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 230 transitions. [2022-11-20 21:08:59,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 230 transitions. [2022-11-20 21:08:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 21:08:59,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:08:59,335 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] [2022-11-20 21:08:59,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:08:59,336 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:08:59,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:08:59,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1508454477, now seen corresponding path program 1 times [2022-11-20 21:08:59,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:08:59,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001646723] [2022-11-20 21:08:59,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:08:59,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:08:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:08:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:08:59,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:08:59,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001646723] [2022-11-20 21:08:59,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001646723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:08:59,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:08:59,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:08:59,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782290767] [2022-11-20 21:08:59,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:08:59,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:08:59,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:08:59,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:08:59,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:08:59,470 INFO L87 Difference]: Start difference. First operand 167 states and 230 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:08:59,577 INFO L93 Difference]: Finished difference Result 419 states and 600 transitions. [2022-11-20 21:08:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:08:59,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2022-11-20 21:08:59,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:08:59,585 INFO L225 Difference]: With dead ends: 419 [2022-11-20 21:08:59,585 INFO L226 Difference]: Without dead ends: 285 [2022-11-20 21:08:59,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:08:59,595 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 44 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:08:59,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 165 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:08:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-20 21:08:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2022-11-20 21:08:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.4113475177304964) internal successors, (398), 282 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 398 transitions. [2022-11-20 21:08:59,678 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 398 transitions. Word has length 54 [2022-11-20 21:08:59,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:08:59,680 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 398 transitions. [2022-11-20 21:08:59,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 398 transitions. [2022-11-20 21:08:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 21:08:59,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:08:59,688 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] [2022-11-20 21:08:59,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:08:59,688 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:08:59,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:08:59,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1561870265, now seen corresponding path program 1 times [2022-11-20 21:08:59,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:08:59,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024609866] [2022-11-20 21:08:59,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:08:59,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:08:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:08:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:08:59,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:08:59,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024609866] [2022-11-20 21:08:59,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024609866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:08:59,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:08:59,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:08:59,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006586282] [2022-11-20 21:08:59,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:08:59,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:08:59,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:08:59,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:08:59,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:08:59,782 INFO L87 Difference]: Start difference. First operand 283 states and 398 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:59,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:08:59,899 INFO L93 Difference]: Finished difference Result 751 states and 1080 transitions. [2022-11-20 21:08:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:08:59,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 57 [2022-11-20 21:08:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:08:59,903 INFO L225 Difference]: With dead ends: 751 [2022-11-20 21:08:59,903 INFO L226 Difference]: Without dead ends: 501 [2022-11-20 21:08:59,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:08:59,905 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 39 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:08:59,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 161 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:08:59,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-20 21:08:59,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 499. [2022-11-20 21:08:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.4176706827309238) internal successors, (706), 498 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 706 transitions. [2022-11-20 21:08:59,985 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 706 transitions. Word has length 57 [2022-11-20 21:08:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:08:59,986 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 706 transitions. [2022-11-20 21:08:59,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 706 transitions. [2022-11-20 21:08:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 21:08:59,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:08:59,987 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] [2022-11-20 21:08:59,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 21:08:59,988 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:08:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:08:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1448811497, now seen corresponding path program 1 times [2022-11-20 21:08:59,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:08:59,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130600169] [2022-11-20 21:08:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:08:59,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:00,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:00,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130600169] [2022-11-20 21:09:00,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130600169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:00,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:00,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:09:00,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549367642] [2022-11-20 21:09:00,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:00,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:09:00,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:00,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:09:00,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:09:00,070 INFO L87 Difference]: Start difference. First operand 499 states and 706 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:00,264 INFO L93 Difference]: Finished difference Result 1367 states and 1956 transitions. [2022-11-20 21:09:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:09:00,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2022-11-20 21:09:00,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:00,268 INFO L225 Difference]: With dead ends: 1367 [2022-11-20 21:09:00,269 INFO L226 Difference]: Without dead ends: 901 [2022-11-20 21:09:00,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:09:00,271 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 34 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:00,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 157 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:09:00,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-11-20 21:09:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 899. [2022-11-20 21:09:00,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.4097995545657016) internal successors, (1266), 898 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1266 transitions. [2022-11-20 21:09:00,478 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1266 transitions. Word has length 60 [2022-11-20 21:09:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:00,479 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1266 transitions. [2022-11-20 21:09:00,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1266 transitions. [2022-11-20 21:09:00,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 21:09:00,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:00,487 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] [2022-11-20 21:09:00,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 21:09:00,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:00,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2021688885, now seen corresponding path program 1 times [2022-11-20 21:09:00,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:00,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93257586] [2022-11-20 21:09:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:00,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:00,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:00,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93257586] [2022-11-20 21:09:00,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93257586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:00,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:00,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 21:09:00,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507152544] [2022-11-20 21:09:00,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:00,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:09:00,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:00,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:09:00,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:09:00,654 INFO L87 Difference]: Start difference. First operand 899 states and 1266 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:01,546 INFO L93 Difference]: Finished difference Result 3691 states and 5249 transitions. [2022-11-20 21:09:01,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 21:09:01,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 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 63 [2022-11-20 21:09:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:01,559 INFO L225 Difference]: With dead ends: 3691 [2022-11-20 21:09:01,560 INFO L226 Difference]: Without dead ends: 2825 [2022-11-20 21:09:01,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:09:01,567 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 558 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:01,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1295 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:09:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2022-11-20 21:09:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 1247. [2022-11-20 21:09:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 1.397271268057785) internal successors, (1741), 1246 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1741 transitions. [2022-11-20 21:09:01,837 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1741 transitions. Word has length 63 [2022-11-20 21:09:01,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:01,839 INFO L495 AbstractCegarLoop]: Abstraction has 1247 states and 1741 transitions. [2022-11-20 21:09:01,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:01,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1741 transitions. [2022-11-20 21:09:01,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 21:09:01,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:01,840 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] [2022-11-20 21:09:01,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 21:09:01,840 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:01,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1862495607, now seen corresponding path program 1 times [2022-11-20 21:09:01,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:01,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506690136] [2022-11-20 21:09:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:01,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:01,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:01,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506690136] [2022-11-20 21:09:01,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506690136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:01,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:01,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:09:01,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628683736] [2022-11-20 21:09:01,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:01,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:09:01,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:01,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:09:01,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:09:01,981 INFO L87 Difference]: Start difference. First operand 1247 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:02,405 INFO L93 Difference]: Finished difference Result 3181 states and 4487 transitions. [2022-11-20 21:09:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:09:02,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2022-11-20 21:09:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:02,413 INFO L225 Difference]: With dead ends: 3181 [2022-11-20 21:09:02,413 INFO L226 Difference]: Without dead ends: 1967 [2022-11-20 21:09:02,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:09:02,416 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 28 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:02,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 132 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:09:02,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2022-11-20 21:09:02,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1965. [2022-11-20 21:09:02,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.4058044806517311) internal successors, (2761), 1964 states have internal predecessors, (2761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2761 transitions. [2022-11-20 21:09:02,811 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2761 transitions. Word has length 65 [2022-11-20 21:09:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:02,811 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2761 transitions. [2022-11-20 21:09:02,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2761 transitions. [2022-11-20 21:09:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 21:09:02,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:02,813 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] [2022-11-20 21:09:02,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 21:09:02,813 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:02,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:02,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1876348422, now seen corresponding path program 1 times [2022-11-20 21:09:02,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:02,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311327891] [2022-11-20 21:09:02,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:02,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:03,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:03,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311327891] [2022-11-20 21:09:03,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311327891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:03,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:03,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 21:09:03,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607179942] [2022-11-20 21:09:03,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:03,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:09:03,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:03,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:09:03,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:09:03,142 INFO L87 Difference]: Start difference. First operand 1965 states and 2761 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:03,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:03,779 INFO L93 Difference]: Finished difference Result 3897 states and 5488 transitions. [2022-11-20 21:09:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:09:03,780 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 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 65 [2022-11-20 21:09:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:03,786 INFO L225 Difference]: With dead ends: 3897 [2022-11-20 21:09:03,788 INFO L226 Difference]: Without dead ends: 1967 [2022-11-20 21:09:03,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:09:03,794 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 302 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:03,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 295 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:03,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2022-11-20 21:09:04,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1965. [2022-11-20 21:09:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.404786150712831) internal successors, (2759), 1964 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:04,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2759 transitions. [2022-11-20 21:09:04,136 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2759 transitions. Word has length 65 [2022-11-20 21:09:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:04,137 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2759 transitions. [2022-11-20 21:09:04,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2759 transitions. [2022-11-20 21:09:04,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 21:09:04,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:04,138 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] [2022-11-20 21:09:04,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 21:09:04,139 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:04,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:04,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1957500574, now seen corresponding path program 1 times [2022-11-20 21:09:04,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:04,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309831754] [2022-11-20 21:09:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:04,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:04,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:04,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309831754] [2022-11-20 21:09:04,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309831754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:04,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:04,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:09:04,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552407548] [2022-11-20 21:09:04,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:04,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:09:04,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:04,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:09:04,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:09:04,261 INFO L87 Difference]: Start difference. First operand 1965 states and 2759 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:04,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:04,873 INFO L93 Difference]: Finished difference Result 3895 states and 5483 transitions. [2022-11-20 21:09:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:09:04,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 66 [2022-11-20 21:09:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:04,881 INFO L225 Difference]: With dead ends: 3895 [2022-11-20 21:09:04,881 INFO L226 Difference]: Without dead ends: 1965 [2022-11-20 21:09:04,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:09:04,885 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 199 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:04,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 71 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-11-20 21:09:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1965. [2022-11-20 21:09:05,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.3884928716904277) internal successors, (2727), 1964 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2727 transitions. [2022-11-20 21:09:05,246 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2727 transitions. Word has length 66 [2022-11-20 21:09:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:05,246 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2727 transitions. [2022-11-20 21:09:05,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2727 transitions. [2022-11-20 21:09:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 21:09:05,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:05,248 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] [2022-11-20 21:09:05,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 21:09:05,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:05,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1829415267, now seen corresponding path program 1 times [2022-11-20 21:09:05,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:05,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235063532] [2022-11-20 21:09:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:05,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:05,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:05,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235063532] [2022-11-20 21:09:05,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235063532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:05,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:05,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:09:05,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140114197] [2022-11-20 21:09:05,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:05,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:09:05,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:05,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:09:05,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:09:05,356 INFO L87 Difference]: Start difference. First operand 1965 states and 2727 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:05,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:05,812 INFO L93 Difference]: Finished difference Result 3895 states and 5419 transitions. [2022-11-20 21:09:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:09:05,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 66 [2022-11-20 21:09:05,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:05,820 INFO L225 Difference]: With dead ends: 3895 [2022-11-20 21:09:05,820 INFO L226 Difference]: Without dead ends: 1965 [2022-11-20 21:09:05,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:09:05,825 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 170 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:05,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 87 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-11-20 21:09:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1965. [2022-11-20 21:09:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.375254582484725) internal successors, (2701), 1964 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2701 transitions. [2022-11-20 21:09:06,175 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2701 transitions. Word has length 66 [2022-11-20 21:09:06,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:06,175 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2701 transitions. [2022-11-20 21:09:06,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2701 transitions. [2022-11-20 21:09:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 21:09:06,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:06,177 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] [2022-11-20 21:09:06,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 21:09:06,177 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:06,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:06,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1936261528, now seen corresponding path program 1 times [2022-11-20 21:09:06,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:06,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901601964] [2022-11-20 21:09:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:06,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:06,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:06,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901601964] [2022-11-20 21:09:06,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901601964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:06,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:06,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:09:06,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715405771] [2022-11-20 21:09:06,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:06,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:09:06,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:06,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:09:06,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:09:06,294 INFO L87 Difference]: Start difference. First operand 1965 states and 2701 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:06,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:06,816 INFO L93 Difference]: Finished difference Result 3895 states and 5367 transitions. [2022-11-20 21:09:06,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:09:06,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 66 [2022-11-20 21:09:06,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:06,826 INFO L225 Difference]: With dead ends: 3895 [2022-11-20 21:09:06,827 INFO L226 Difference]: Without dead ends: 1965 [2022-11-20 21:09:06,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:09:06,831 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 206 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:06,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 63 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-11-20 21:09:07,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1965. [2022-11-20 21:09:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.354887983706721) internal successors, (2661), 1964 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:07,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2661 transitions. [2022-11-20 21:09:07,286 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2661 transitions. Word has length 66 [2022-11-20 21:09:07,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:07,286 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2661 transitions. [2022-11-20 21:09:07,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:07,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2661 transitions. [2022-11-20 21:09:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 21:09:07,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:07,287 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] [2022-11-20 21:09:07,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 21:09:07,288 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:07,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1173397821, now seen corresponding path program 1 times [2022-11-20 21:09:07,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:07,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172879449] [2022-11-20 21:09:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:07,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:07,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:07,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172879449] [2022-11-20 21:09:07,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172879449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:07,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:07,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 21:09:07,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077204045] [2022-11-20 21:09:07,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:07,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:09:07,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:07,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:09:07,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:07,608 INFO L87 Difference]: Start difference. First operand 1965 states and 2661 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:08,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:08,422 INFO L93 Difference]: Finished difference Result 2628 states and 3519 transitions. [2022-11-20 21:09:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:09:08,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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 66 [2022-11-20 21:09:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:08,432 INFO L225 Difference]: With dead ends: 2628 [2022-11-20 21:09:08,432 INFO L226 Difference]: Without dead ends: 2626 [2022-11-20 21:09:08,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:09:08,434 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 128 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:08,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 512 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:08,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2022-11-20 21:09:08,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1965. [2022-11-20 21:09:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.3467413441955194) internal successors, (2645), 1964 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2645 transitions. [2022-11-20 21:09:08,930 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2645 transitions. Word has length 66 [2022-11-20 21:09:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:08,931 INFO L495 AbstractCegarLoop]: Abstraction has 1965 states and 2645 transitions. [2022-11-20 21:09:08,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2645 transitions. [2022-11-20 21:09:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 21:09:08,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:08,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:08,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 21:09:08,933 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:08,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:08,933 INFO L85 PathProgramCache]: Analyzing trace with hash -97171403, now seen corresponding path program 1 times [2022-11-20 21:09:08,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:08,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223857309] [2022-11-20 21:09:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:08,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:20,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:20,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223857309] [2022-11-20 21:09:20,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223857309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:09:20,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400131860] [2022-11-20 21:09:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:20,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:20,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:09:20,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:09:20,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff69167c-875d-4e0d-8ef6-8b829c6f766d/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:09:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:20,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 21:09:20,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:37,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:22:12,498 WARN L233 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 887 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)