./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba --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 4a068220cd9a63125e810935e79eeb0e481ecd288491865590be5286d46acb22 --- 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-b5237d8 [2022-11-22 02:34:33,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:34:33,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:34:33,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:34:33,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:34:33,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:34:33,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:34:33,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:34:33,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:34:33,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:34:33,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:34:33,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:34:33,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:34:33,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:34:33,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:34:33,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:34:33,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:34:33,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:34:33,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:34:33,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:34:33,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:34:33,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:34:33,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:34:33,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:34:33,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:34:33,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:34:33,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:34:33,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:34:33,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:34:33,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:34:33,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:34:33,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:34:33,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:34:33,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:34:33,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:34:33,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:34:33,183 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:34:33,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:34:33,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:34:33,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:34:33,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:34:33,186 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:34:33,207 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:34:33,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:34:33,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:34:33,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:34:33,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:34:33,209 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:34:33,209 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:34:33,210 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:34:33,210 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:34:33,210 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:34:33,210 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:34:33,211 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:34:33,211 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:34:33,211 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:34:33,211 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:34:33,212 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:34:33,212 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:34:33,212 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:34:33,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:34:33,213 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:34:33,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:34:33,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:34:33,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:34:33,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:34:33,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:34:33,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:34:33,215 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:34:33,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:34:33,215 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:34:33,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:34:33,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:34:33,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:34:33,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:34:33,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:34:33,217 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:34:33,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:34:33,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:34:33,218 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:34:33,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:34:33,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:34:33,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:34:33,219 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_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a068220cd9a63125e810935e79eeb0e481ecd288491865590be5286d46acb22 [2022-11-22 02:34:33,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:34:33,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:34:33,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:34:33,558 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:34:33,558 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:34:33,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-22 02:34:36,595 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:34:36,847 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:34:36,848 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-22 02:34:36,858 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/data/76a615c8b/d048e3321ab442848682bf895d0f4542/FLAG821d555b3 [2022-11-22 02:34:36,873 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/data/76a615c8b/d048e3321ab442848682bf895d0f4542 [2022-11-22 02:34:36,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:34:36,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:34:36,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:34:36,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:34:36,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:34:36,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:34:36" (1/1) ... [2022-11-22 02:34:36,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577d589d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:36, skipping insertion in model container [2022-11-22 02:34:36,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:34:36" (1/1) ... [2022-11-22 02:34:36,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:34:36,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:34:37,156 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_f0fb21b8-ad55-441b-817b-7fa1615c435f/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2022-11-22 02:34:37,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:34:37,239 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:34:37,296 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_f0fb21b8-ad55-441b-817b-7fa1615c435f/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7235,7248] [2022-11-22 02:34:37,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:34:37,357 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:34:37,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:37 WrapperNode [2022-11-22 02:34:37,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:34:37,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:34:37,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:34:37,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:34:37,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:37" (1/1) ... [2022-11-22 02:34:37,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:37" (1/1) ... [2022-11-22 02:34:37,415 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 588 [2022-11-22 02:34:37,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:34:37,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:34:37,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:34:37,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:34:37,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:37" (1/1) ... [2022-11-22 02:34:37,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:37" (1/1) ... [2022-11-22 02:34:37,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:37" (1/1) ... [2022-11-22 02:34:37,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:37" (1/1) ... [2022-11-22 02:34:37,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:37" (1/1) ... [2022-11-22 02:34:37,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:37" (1/1) ... [2022-11-22 02:34:37,458 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:37" (1/1) ... [2022-11-22 02:34:37,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:37" (1/1) ... [2022-11-22 02:34:37,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:34:37,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:34:37,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:34:37,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:34:37,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:37" (1/1) ... [2022-11-22 02:34:37,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:34:37,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:37,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:34:37,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:34:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:34:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:34:37,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:34:37,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:34:37,778 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:34:37,780 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:34:38,424 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:34:38,866 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:34:38,867 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 02:34:38,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:34:38 BoogieIcfgContainer [2022-11-22 02:34:38,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:34:38,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:34:38,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:34:38,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:34:38,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:34:36" (1/3) ... [2022-11-22 02:34:38,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30655904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:34:38, skipping insertion in model container [2022-11-22 02:34:38,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:34:37" (2/3) ... [2022-11-22 02:34:38,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30655904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:34:38, skipping insertion in model container [2022-11-22 02:34:38,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:34:38" (3/3) ... [2022-11-22 02:34:38,880 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-22 02:34:38,907 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:34:38,907 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:34:38,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:34:38,979 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;@7268ff34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:34:38,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:34:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 1.7647058823529411) internal successors, (150), 86 states have internal predecessors, (150), 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) [2022-11-22 02:34:38,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 02:34:38,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:38,990 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] [2022-11-22 02:34:38,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:38,996 INFO L85 PathProgramCache]: Analyzing trace with hash 223748202, now seen corresponding path program 1 times [2022-11-22 02:34:39,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:39,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7044282] [2022-11-22 02:34:39,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:39,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:39,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:39,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7044282] [2022-11-22 02:34:39,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7044282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:39,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:39,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:34:39,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701322964] [2022-11-22 02:34:39,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:39,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:34:39,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:39,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:34:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:34:39,535 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 1.7647058823529411) internal successors, (150), 86 states have internal predecessors, (150), 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 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-11-22 02:34:39,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:39,627 INFO L93 Difference]: Finished difference Result 191 states and 317 transitions. [2022-11-22 02:34:39,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:34:39,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 38 [2022-11-22 02:34:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:39,642 INFO L225 Difference]: With dead ends: 191 [2022-11-22 02:34:39,643 INFO L226 Difference]: Without dead ends: 129 [2022-11-22 02:34:39,647 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 [2022-11-22 02:34:39,652 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 92 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:39,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 322 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:34:39,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-22 02:34:39,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2022-11-22 02:34:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.492063492063492) internal successors, (188), 126 states have internal predecessors, (188), 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) [2022-11-22 02:34:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 188 transitions. [2022-11-22 02:34:39,709 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 188 transitions. Word has length 38 [2022-11-22 02:34:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:39,710 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 188 transitions. [2022-11-22 02:34:39,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2022-11-22 02:34:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 188 transitions. [2022-11-22 02:34:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 02:34:39,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:39,712 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] [2022-11-22 02:34:39,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:34:39,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:39,714 INFO L85 PathProgramCache]: Analyzing trace with hash -679526618, now seen corresponding path program 1 times [2022-11-22 02:34:39,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:39,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034964976] [2022-11-22 02:34:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:39,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:39,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:39,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034964976] [2022-11-22 02:34:39,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034964976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:39,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:39,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:34:39,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643257254] [2022-11-22 02:34:39,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:39,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:34:39,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:39,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:34:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:34:39,849 INFO L87 Difference]: Start difference. First operand 127 states and 188 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-11-22 02:34:39,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:39,977 INFO L93 Difference]: Finished difference Result 282 states and 437 transitions. [2022-11-22 02:34:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:34:39,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2022-11-22 02:34:39,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:39,979 INFO L225 Difference]: With dead ends: 282 [2022-11-22 02:34:39,980 INFO L226 Difference]: Without dead ends: 184 [2022-11-22 02:34:39,981 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 [2022-11-22 02:34:39,982 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 81 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:39,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 194 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:34:39,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-22 02:34:40,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2022-11-22 02:34:40,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5082872928176796) internal successors, (273), 181 states have internal predecessors, (273), 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) [2022-11-22 02:34:40,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 273 transitions. [2022-11-22 02:34:40,018 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 273 transitions. Word has length 40 [2022-11-22 02:34:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:40,018 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 273 transitions. [2022-11-22 02:34:40,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2022-11-22 02:34:40,019 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 273 transitions. [2022-11-22 02:34:40,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 02:34:40,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:40,020 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] [2022-11-22 02:34:40,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:34:40,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:40,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:40,021 INFO L85 PathProgramCache]: Analyzing trace with hash 128704147, now seen corresponding path program 1 times [2022-11-22 02:34:40,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:40,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677094945] [2022-11-22 02:34:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:40,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:40,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:40,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677094945] [2022-11-22 02:34:40,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677094945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:40,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:40,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:34:40,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369596224] [2022-11-22 02:34:40,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:40,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:34:40,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:40,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:34:40,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:34:40,176 INFO L87 Difference]: Start difference. First operand 182 states and 273 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2022-11-22 02:34:40,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:40,253 INFO L93 Difference]: Finished difference Result 448 states and 700 transitions. [2022-11-22 02:34:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:34:40,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2022-11-22 02:34:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:40,256 INFO L225 Difference]: With dead ends: 448 [2022-11-22 02:34:40,256 INFO L226 Difference]: Without dead ends: 297 [2022-11-22 02:34:40,257 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 [2022-11-22 02:34:40,259 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 82 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:40,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 244 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:34:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-22 02:34:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2022-11-22 02:34:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.5442176870748299) internal successors, (454), 294 states have internal predecessors, (454), 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) [2022-11-22 02:34:40,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 454 transitions. [2022-11-22 02:34:40,321 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 454 transitions. Word has length 42 [2022-11-22 02:34:40,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:40,321 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 454 transitions. [2022-11-22 02:34:40,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2022-11-22 02:34:40,322 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 454 transitions. [2022-11-22 02:34:40,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:34:40,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:40,329 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] [2022-11-22 02:34:40,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:34:40,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:40,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:40,331 INFO L85 PathProgramCache]: Analyzing trace with hash -725243457, now seen corresponding path program 1 times [2022-11-22 02:34:40,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:40,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106691184] [2022-11-22 02:34:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:40,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:40,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:40,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106691184] [2022-11-22 02:34:40,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106691184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:40,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:40,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:34:40,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135906628] [2022-11-22 02:34:40,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:40,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:34:40,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:40,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:34:40,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:34:40,458 INFO L87 Difference]: Start difference. First operand 295 states and 454 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-11-22 02:34:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:40,540 INFO L93 Difference]: Finished difference Result 723 states and 1138 transitions. [2022-11-22 02:34:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:34:40,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2022-11-22 02:34:40,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:40,545 INFO L225 Difference]: With dead ends: 723 [2022-11-22 02:34:40,545 INFO L226 Difference]: Without dead ends: 459 [2022-11-22 02:34:40,550 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 [2022-11-22 02:34:40,551 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 81 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:40,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 210 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:34:40,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-11-22 02:34:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2022-11-22 02:34:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.5592105263157894) internal successors, (711), 456 states have internal predecessors, (711), 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) [2022-11-22 02:34:40,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 711 transitions. [2022-11-22 02:34:40,592 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 711 transitions. Word has length 44 [2022-11-22 02:34:40,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:40,593 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 711 transitions. [2022-11-22 02:34:40,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-11-22 02:34:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 711 transitions. [2022-11-22 02:34:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 02:34:40,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:40,594 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] [2022-11-22 02:34:40,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:34:40,594 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:40,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash -448509902, now seen corresponding path program 1 times [2022-11-22 02:34:40,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:40,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466337060] [2022-11-22 02:34:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:40,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:40,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:40,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466337060] [2022-11-22 02:34:40,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466337060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:40,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:40,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:34:40,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143832639] [2022-11-22 02:34:40,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:40,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:34:40,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:40,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:34:40,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:34:40,746 INFO L87 Difference]: Start difference. First operand 457 states and 711 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2022-11-22 02:34:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:40,878 INFO L93 Difference]: Finished difference Result 1175 states and 1862 transitions. [2022-11-22 02:34:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:34:40,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 46 [2022-11-22 02:34:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:40,887 INFO L225 Difference]: With dead ends: 1175 [2022-11-22 02:34:40,887 INFO L226 Difference]: Without dead ends: 762 [2022-11-22 02:34:40,889 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 [2022-11-22 02:34:40,894 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 77 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:40,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 225 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:34:40,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-11-22 02:34:40,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 760. [2022-11-22 02:34:40,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 1.5691699604743083) internal successors, (1191), 759 states have internal predecessors, (1191), 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) [2022-11-22 02:34:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1191 transitions. [2022-11-22 02:34:41,000 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1191 transitions. Word has length 46 [2022-11-22 02:34:41,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:41,001 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 1191 transitions. [2022-11-22 02:34:41,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2022-11-22 02:34:41,002 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1191 transitions. [2022-11-22 02:34:41,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 02:34:41,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:41,009 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] [2022-11-22 02:34:41,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:34:41,010 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:41,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1743853951, now seen corresponding path program 1 times [2022-11-22 02:34:41,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:41,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856415842] [2022-11-22 02:34:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:41,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:41,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:41,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856415842] [2022-11-22 02:34:41,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856415842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:41,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:41,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:34:41,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041671565] [2022-11-22 02:34:41,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:41,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:34:41,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:41,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:34:41,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:34:41,126 INFO L87 Difference]: Start difference. First operand 760 states and 1191 transitions. 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) [2022-11-22 02:34:41,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:41,333 INFO L93 Difference]: Finished difference Result 1902 states and 3012 transitions. [2022-11-22 02:34:41,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:34:41,337 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 [2022-11-22 02:34:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:41,344 INFO L225 Difference]: With dead ends: 1902 [2022-11-22 02:34:41,344 INFO L226 Difference]: Without dead ends: 1186 [2022-11-22 02:34:41,345 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 [2022-11-22 02:34:41,351 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 76 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:41,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 212 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:34:41,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-11-22 02:34:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1184. [2022-11-22 02:34:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.5731191885038038) internal successors, (1861), 1183 states have internal predecessors, (1861), 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) [2022-11-22 02:34:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1861 transitions. [2022-11-22 02:34:41,500 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1861 transitions. Word has length 48 [2022-11-22 02:34:41,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:41,500 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1861 transitions. [2022-11-22 02:34:41,500 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) [2022-11-22 02:34:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1861 transitions. [2022-11-22 02:34:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 02:34:41,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:41,502 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] [2022-11-22 02:34:41,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:34:41,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:41,503 INFO L85 PathProgramCache]: Analyzing trace with hash -496972498, now seen corresponding path program 1 times [2022-11-22 02:34:41,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:41,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500674373] [2022-11-22 02:34:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:41,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:41,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:41,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500674373] [2022-11-22 02:34:41,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500674373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:41,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:41,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:34:41,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283380742] [2022-11-22 02:34:41,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:41,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:34:41,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:41,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:34:41,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:34:41,660 INFO L87 Difference]: Start difference. First operand 1184 states and 1861 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2022-11-22 02:34:42,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:42,129 INFO L93 Difference]: Finished difference Result 3012 states and 4750 transitions. [2022-11-22 02:34:42,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:34:42,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 50 [2022-11-22 02:34:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:42,139 INFO L225 Difference]: With dead ends: 3012 [2022-11-22 02:34:42,139 INFO L226 Difference]: Without dead ends: 1885 [2022-11-22 02:34:42,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:34:42,142 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 463 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:42,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 816 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:34:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2022-11-22 02:34:42,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1875. [2022-11-22 02:34:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.5618996798292422) internal successors, (2927), 1874 states have internal predecessors, (2927), 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) [2022-11-22 02:34:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2927 transitions. [2022-11-22 02:34:42,385 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2927 transitions. Word has length 50 [2022-11-22 02:34:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:42,386 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2927 transitions. [2022-11-22 02:34:42,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2022-11-22 02:34:42,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2927 transitions. [2022-11-22 02:34:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 02:34:42,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:42,388 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] [2022-11-22 02:34:42,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:34:42,388 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:42,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:42,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1711217546, now seen corresponding path program 1 times [2022-11-22 02:34:42,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:42,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089074915] [2022-11-22 02:34:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:42,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:42,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:42,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089074915] [2022-11-22 02:34:42,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089074915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:42,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:42,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:34:42,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976254068] [2022-11-22 02:34:42,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:42,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:34:42,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:34:42,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:34:42,526 INFO L87 Difference]: Start difference. First operand 1875 states and 2927 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2022-11-22 02:34:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:42,856 INFO L93 Difference]: Finished difference Result 3695 states and 5786 transitions. [2022-11-22 02:34:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:34:42,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 [2022-11-22 02:34:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:42,869 INFO L225 Difference]: With dead ends: 3695 [2022-11-22 02:34:42,869 INFO L226 Difference]: Without dead ends: 1877 [2022-11-22 02:34:42,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:34:42,874 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 153 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:42,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 302 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:34:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-22 02:34:43,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2022-11-22 02:34:43,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.555496264674493) internal successors, (2915), 1874 states have internal predecessors, (2915), 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) [2022-11-22 02:34:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2915 transitions. [2022-11-22 02:34:43,151 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2915 transitions. Word has length 51 [2022-11-22 02:34:43,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:43,151 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2915 transitions. [2022-11-22 02:34:43,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2022-11-22 02:34:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2915 transitions. [2022-11-22 02:34:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 02:34:43,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:43,153 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] [2022-11-22 02:34:43,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:34:43,153 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:43,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:43,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1450190197, now seen corresponding path program 1 times [2022-11-22 02:34:43,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:43,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395684481] [2022-11-22 02:34:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:43,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:43,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:43,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395684481] [2022-11-22 02:34:43,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395684481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:43,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:43,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:34:43,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217630984] [2022-11-22 02:34:43,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:43,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:34:43,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:43,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:34:43,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:34:43,310 INFO L87 Difference]: Start difference. First operand 1875 states and 2915 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2022-11-22 02:34:43,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:43,610 INFO L93 Difference]: Finished difference Result 3695 states and 5762 transitions. [2022-11-22 02:34:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:34:43,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 52 [2022-11-22 02:34:43,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:43,618 INFO L225 Difference]: With dead ends: 3695 [2022-11-22 02:34:43,618 INFO L226 Difference]: Without dead ends: 1877 [2022-11-22 02:34:43,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:34:43,621 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 161 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:43,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 308 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:34:43,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-22 02:34:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2022-11-22 02:34:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.5490928495197438) internal successors, (2903), 1874 states have internal predecessors, (2903), 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) [2022-11-22 02:34:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2903 transitions. [2022-11-22 02:34:43,824 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2903 transitions. Word has length 52 [2022-11-22 02:34:43,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:43,824 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2903 transitions. [2022-11-22 02:34:43,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2022-11-22 02:34:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2903 transitions. [2022-11-22 02:34:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 02:34:43,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:43,825 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] [2022-11-22 02:34:43,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:34:43,826 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1952834993, now seen corresponding path program 1 times [2022-11-22 02:34:43,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:43,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912485358] [2022-11-22 02:34:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:43,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:43,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:43,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912485358] [2022-11-22 02:34:43,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912485358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:43,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:43,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:34:43,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248361846] [2022-11-22 02:34:43,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:43,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:34:43,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:43,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:34:43,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:34:43,925 INFO L87 Difference]: Start difference. First operand 1875 states and 2903 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2022-11-22 02:34:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:44,195 INFO L93 Difference]: Finished difference Result 3695 states and 5738 transitions. [2022-11-22 02:34:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:34:44,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2022-11-22 02:34:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:44,204 INFO L225 Difference]: With dead ends: 3695 [2022-11-22 02:34:44,204 INFO L226 Difference]: Without dead ends: 1877 [2022-11-22 02:34:44,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:34:44,208 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 159 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:44,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 311 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:34:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-22 02:34:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2022-11-22 02:34:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.5426894343649946) internal successors, (2891), 1874 states have internal predecessors, (2891), 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) [2022-11-22 02:34:44,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2891 transitions. [2022-11-22 02:34:44,437 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2891 transitions. Word has length 53 [2022-11-22 02:34:44,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:44,437 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2891 transitions. [2022-11-22 02:34:44,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2022-11-22 02:34:44,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2891 transitions. [2022-11-22 02:34:44,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-22 02:34:44,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:44,438 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] [2022-11-22 02:34:44,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 02:34:44,439 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:44,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:44,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1743591742, now seen corresponding path program 1 times [2022-11-22 02:34:44,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:44,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187346555] [2022-11-22 02:34:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:44,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:44,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:44,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187346555] [2022-11-22 02:34:44,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187346555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:44,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:44,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:34:44,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866298885] [2022-11-22 02:34:44,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:44,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:34:44,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:34:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:34:44,619 INFO L87 Difference]: Start difference. First operand 1875 states and 2891 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2022-11-22 02:34:45,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:45,006 INFO L93 Difference]: Finished difference Result 3695 states and 5714 transitions. [2022-11-22 02:34:45,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:34:45,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 55 [2022-11-22 02:34:45,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:45,015 INFO L225 Difference]: With dead ends: 3695 [2022-11-22 02:34:45,015 INFO L226 Difference]: Without dead ends: 1877 [2022-11-22 02:34:45,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:34:45,019 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 185 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:45,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 297 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:34:45,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-11-22 02:34:45,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1875. [2022-11-22 02:34:45,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.538420490928495) internal successors, (2883), 1874 states have internal predecessors, (2883), 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) [2022-11-22 02:34:45,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 2883 transitions. [2022-11-22 02:34:45,250 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 2883 transitions. Word has length 55 [2022-11-22 02:34:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:45,250 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 2883 transitions. [2022-11-22 02:34:45,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2022-11-22 02:34:45,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 2883 transitions. [2022-11-22 02:34:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 02:34:45,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:45,251 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] [2022-11-22 02:34:45,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 02:34:45,251 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2055668249, now seen corresponding path program 1 times [2022-11-22 02:34:45,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:45,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805299741] [2022-11-22 02:34:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:45,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:45,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:45,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805299741] [2022-11-22 02:34:45,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805299741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:45,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:45,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:34:45,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66209558] [2022-11-22 02:34:45,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:45,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:34:45,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:45,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:34:45,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:34:45,457 INFO L87 Difference]: Start difference. First operand 1875 states and 2883 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-11-22 02:34:45,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:45,887 INFO L93 Difference]: Finished difference Result 4716 states and 7241 transitions. [2022-11-22 02:34:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:34:45,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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 58 [2022-11-22 02:34:45,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:45,897 INFO L225 Difference]: With dead ends: 4716 [2022-11-22 02:34:45,897 INFO L226 Difference]: Without dead ends: 2898 [2022-11-22 02:34:45,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:34:45,900 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 244 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:45,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 316 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:34:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2022-11-22 02:34:46,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2896. [2022-11-22 02:34:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 1.5246977547495681) internal successors, (4414), 2895 states have internal predecessors, (4414), 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) [2022-11-22 02:34:46,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 4414 transitions. [2022-11-22 02:34:46,272 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 4414 transitions. Word has length 58 [2022-11-22 02:34:46,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:46,272 INFO L495 AbstractCegarLoop]: Abstraction has 2896 states and 4414 transitions. [2022-11-22 02:34:46,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2022-11-22 02:34:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 4414 transitions. [2022-11-22 02:34:46,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-22 02:34:46,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:46,274 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] [2022-11-22 02:34:46,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 02:34:46,274 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:46,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:46,275 INFO L85 PathProgramCache]: Analyzing trace with hash 709545590, now seen corresponding path program 1 times [2022-11-22 02:34:46,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:46,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013285266] [2022-11-22 02:34:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:46,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:34:46,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:46,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013285266] [2022-11-22 02:34:46,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013285266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:46,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:46,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:34:46,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533394682] [2022-11-22 02:34:46,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:46,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:34:46,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:46,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:34:46,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:34:46,565 INFO L87 Difference]: Start difference. First operand 2896 states and 4414 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2022-11-22 02:34:47,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:47,281 INFO L93 Difference]: Finished difference Result 3555 states and 5390 transitions. [2022-11-22 02:34:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:34:47,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 59 [2022-11-22 02:34:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:47,296 INFO L225 Difference]: With dead ends: 3555 [2022-11-22 02:34:47,296 INFO L226 Difference]: Without dead ends: 3553 [2022-11-22 02:34:47,298 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 [2022-11-22 02:34:47,298 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 218 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:47,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 711 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:34:47,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2022-11-22 02:34:47,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2902. [2022-11-22 02:34:47,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 1.5215442950706652) internal successors, (4414), 2901 states have internal predecessors, (4414), 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) [2022-11-22 02:34:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 4414 transitions. [2022-11-22 02:34:47,725 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 4414 transitions. Word has length 59 [2022-11-22 02:34:47,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:47,725 INFO L495 AbstractCegarLoop]: Abstraction has 2902 states and 4414 transitions. [2022-11-22 02:34:47,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2022-11-22 02:34:47,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 4414 transitions. [2022-11-22 02:34:47,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 02:34:47,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:47,727 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:47,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 02:34:47,727 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:47,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:47,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1768604799, now seen corresponding path program 1 times [2022-11-22 02:34:47,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:47,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346973955] [2022-11-22 02:34:47,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:47,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:34:49,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:49,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346973955] [2022-11-22 02:34:49,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346973955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:34:49,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236467186] [2022-11-22 02:34:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:49,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:49,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:49,065 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:34:49,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:34:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:49,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:34:49,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:49,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:34:49,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236467186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:49,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:34:49,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-11-22 02:34:49,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738672034] [2022-11-22 02:34:49,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:49,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:34:49,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:49,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:34:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:34:49,754 INFO L87 Difference]: Start difference. First operand 2902 states and 4414 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 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) [2022-11-22 02:34:51,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:51,401 INFO L93 Difference]: Finished difference Result 8379 states and 12782 transitions. [2022-11-22 02:34:51,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:34:51,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 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 67 [2022-11-22 02:34:51,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:51,438 INFO L225 Difference]: With dead ends: 8379 [2022-11-22 02:34:51,438 INFO L226 Difference]: Without dead ends: 5519 [2022-11-22 02:34:51,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:34:51,444 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 428 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:51,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 221 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:34:51,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5519 states. [2022-11-22 02:34:52,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5519 to 5517. [2022-11-22 02:34:52,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 5516 states have (on average 1.5143219724438) internal successors, (8353), 5516 states have internal predecessors, (8353), 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) [2022-11-22 02:34:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 8353 transitions. [2022-11-22 02:34:52,589 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 8353 transitions. Word has length 67 [2022-11-22 02:34:52,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:52,589 INFO L495 AbstractCegarLoop]: Abstraction has 5517 states and 8353 transitions. [2022-11-22 02:34:52,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 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) [2022-11-22 02:34:52,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 8353 transitions. [2022-11-22 02:34:52,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 02:34:52,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:52,591 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:52,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:34:52,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:52,805 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:52,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:52,806 INFO L85 PathProgramCache]: Analyzing trace with hash 318928394, now seen corresponding path program 1 times [2022-11-22 02:34:52,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:52,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639323482] [2022-11-22 02:34:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:52,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:34:52,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:52,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639323482] [2022-11-22 02:34:52,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639323482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:52,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:34:52,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:34:52,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491507336] [2022-11-22 02:34:52,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:52,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:34:52,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:52,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:34:52,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:34:52,940 INFO L87 Difference]: Start difference. First operand 5517 states and 8353 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-11-22 02:34:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:34:54,217 INFO L93 Difference]: Finished difference Result 10998 states and 16667 transitions. [2022-11-22 02:34:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:34:54,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 70 [2022-11-22 02:34:54,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:34:54,234 INFO L225 Difference]: With dead ends: 10998 [2022-11-22 02:34:54,234 INFO L226 Difference]: Without dead ends: 5517 [2022-11-22 02:34:54,241 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 [2022-11-22 02:34:54,242 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 296 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:34:54,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 103 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:34:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5517 states. [2022-11-22 02:34:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5517 to 5517. [2022-11-22 02:34:55,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 5516 states have (on average 1.4807831762146484) internal successors, (8168), 5516 states have internal predecessors, (8168), 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) [2022-11-22 02:34:55,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 8168 transitions. [2022-11-22 02:34:55,386 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 8168 transitions. Word has length 70 [2022-11-22 02:34:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:34:55,387 INFO L495 AbstractCegarLoop]: Abstraction has 5517 states and 8168 transitions. [2022-11-22 02:34:55,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-11-22 02:34:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 8168 transitions. [2022-11-22 02:34:55,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 02:34:55,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:34:55,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:34:55,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 02:34:55,388 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:34:55,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:34:55,389 INFO L85 PathProgramCache]: Analyzing trace with hash -184116433, now seen corresponding path program 1 times [2022-11-22 02:34:55,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:34:55,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951219757] [2022-11-22 02:34:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:55,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:34:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:34:56,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:34:56,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951219757] [2022-11-22 02:34:56,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951219757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:34:56,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303963500] [2022-11-22 02:34:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:34:56,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:34:56,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:34:56,709 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:34:56,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:34:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:34:56,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:34:56,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:34:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:34:57,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:34:57,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303963500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:34:57,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:34:57,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-11-22 02:34:57,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228270149] [2022-11-22 02:34:57,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:34:57,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:34:57,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:34:57,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:34:57,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:34:57,318 INFO L87 Difference]: Start difference. First operand 5517 states and 8168 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-11-22 02:35:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:35:00,209 INFO L93 Difference]: Finished difference Result 16047 states and 23786 transitions. [2022-11-22 02:35:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:35:00,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 70 [2022-11-22 02:35:00,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:35:00,236 INFO L225 Difference]: With dead ends: 16047 [2022-11-22 02:35:00,237 INFO L226 Difference]: Without dead ends: 10599 [2022-11-22 02:35:00,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:35:00,245 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 374 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:35:00,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 234 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:35:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10599 states. [2022-11-22 02:35:02,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10599 to 10597. [2022-11-22 02:35:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10597 states, 10596 states have (on average 1.4730086825217064) internal successors, (15608), 10596 states have internal predecessors, (15608), 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) [2022-11-22 02:35:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10597 states to 10597 states and 15608 transitions. [2022-11-22 02:35:02,406 INFO L78 Accepts]: Start accepts. Automaton has 10597 states and 15608 transitions. Word has length 70 [2022-11-22 02:35:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:35:02,407 INFO L495 AbstractCegarLoop]: Abstraction has 10597 states and 15608 transitions. [2022-11-22 02:35:02,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-11-22 02:35:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 10597 states and 15608 transitions. [2022-11-22 02:35:02,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 02:35:02,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:35:02,408 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:35:02,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:35:02,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 02:35:02,615 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:35:02,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:35:02,615 INFO L85 PathProgramCache]: Analyzing trace with hash 886657518, now seen corresponding path program 1 times [2022-11-22 02:35:02,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:35:02,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972516771] [2022-11-22 02:35:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:02,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:35:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:35:02,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:35:02,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972516771] [2022-11-22 02:35:02,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972516771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:35:02,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:35:02,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:35:02,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436533037] [2022-11-22 02:35:02,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:35:02,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:35:02,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:35:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:35:02,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:35:02,741 INFO L87 Difference]: Start difference. First operand 10597 states and 15608 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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) [2022-11-22 02:35:05,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:35:05,019 INFO L93 Difference]: Finished difference Result 21137 states and 31149 transitions. [2022-11-22 02:35:05,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:35:05,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 73 [2022-11-22 02:35:05,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:35:05,047 INFO L225 Difference]: With dead ends: 21137 [2022-11-22 02:35:05,048 INFO L226 Difference]: Without dead ends: 10597 [2022-11-22 02:35:05,061 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 [2022-11-22 02:35:05,061 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 280 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:35:05,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 105 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:35:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10597 states. [2022-11-22 02:35:06,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10597 to 10597. [2022-11-22 02:35:06,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10597 states, 10596 states have (on average 1.446583616459041) internal successors, (15328), 10596 states have internal predecessors, (15328), 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) [2022-11-22 02:35:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10597 states to 10597 states and 15328 transitions. [2022-11-22 02:35:06,912 INFO L78 Accepts]: Start accepts. Automaton has 10597 states and 15328 transitions. Word has length 73 [2022-11-22 02:35:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:35:06,912 INFO L495 AbstractCegarLoop]: Abstraction has 10597 states and 15328 transitions. [2022-11-22 02:35:06,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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) [2022-11-22 02:35:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 10597 states and 15328 transitions. [2022-11-22 02:35:06,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 02:35:06,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:35:06,915 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:35:06,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 02:35:06,915 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:35:06,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:35:06,916 INFO L85 PathProgramCache]: Analyzing trace with hash 530696617, now seen corresponding path program 1 times [2022-11-22 02:35:06,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:35:06,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390019484] [2022-11-22 02:35:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:06,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:35:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:35:07,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:35:07,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390019484] [2022-11-22 02:35:07,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390019484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:35:07,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874564114] [2022-11-22 02:35:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:07,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:35:07,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:35:07,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:35:07,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:35:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:35:08,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:35:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:35:08,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:35:08,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874564114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:35:08,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:35:08,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-11-22 02:35:08,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237422118] [2022-11-22 02:35:08,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:35:08,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:35:08,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:35:08,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:35:08,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:35:08,658 INFO L87 Difference]: Start difference. First operand 10597 states and 15328 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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) [2022-11-22 02:35:13,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:35:13,632 INFO L93 Difference]: Finished difference Result 31057 states and 44938 transitions. [2022-11-22 02:35:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:35:13,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 73 [2022-11-22 02:35:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:35:13,686 INFO L225 Difference]: With dead ends: 31057 [2022-11-22 02:35:13,687 INFO L226 Difference]: Without dead ends: 20539 [2022-11-22 02:35:13,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-22 02:35:13,703 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 246 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:35:13,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 289 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:35:13,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20539 states. [2022-11-22 02:35:18,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20539 to 20537. [2022-11-22 02:35:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20537 states, 20536 states have (on average 1.4392286716010907) internal successors, (29556), 20536 states have internal predecessors, (29556), 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) [2022-11-22 02:35:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20537 states to 20537 states and 29556 transitions. [2022-11-22 02:35:18,231 INFO L78 Accepts]: Start accepts. Automaton has 20537 states and 29556 transitions. Word has length 73 [2022-11-22 02:35:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:35:18,232 INFO L495 AbstractCegarLoop]: Abstraction has 20537 states and 29556 transitions. [2022-11-22 02:35:18,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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) [2022-11-22 02:35:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 20537 states and 29556 transitions. [2022-11-22 02:35:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 02:35:18,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:35:18,234 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:35:18,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:35:18,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 02:35:18,445 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:35:18,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:35:18,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1012531897, now seen corresponding path program 1 times [2022-11-22 02:35:18,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:35:18,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90114899] [2022-11-22 02:35:18,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:18,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:35:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:35:19,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:35:19,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90114899] [2022-11-22 02:35:19,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90114899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:35:19,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424666805] [2022-11-22 02:35:19,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:19,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:35:19,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:35:19,472 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:35:19,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:35:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:19,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:35:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:35:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:35:20,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:35:20,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424666805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:35:20,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:35:20,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2022-11-22 02:35:20,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221658023] [2022-11-22 02:35:20,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:35:20,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:35:20,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:35:20,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:35:20,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:35:20,257 INFO L87 Difference]: Start difference. First operand 20537 states and 29556 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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) [2022-11-22 02:35:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:35:26,801 INFO L93 Difference]: Finished difference Result 39711 states and 56806 transitions. [2022-11-22 02:35:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:35:26,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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 76 [2022-11-22 02:35:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:35:26,868 INFO L225 Difference]: With dead ends: 39711 [2022-11-22 02:35:26,868 INFO L226 Difference]: Without dead ends: 28993 [2022-11-22 02:35:26,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:35:26,887 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 407 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:35:26,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 387 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:35:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28993 states. [2022-11-22 02:35:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28993 to 20559. [2022-11-22 02:35:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20559 states, 20558 states have (on average 1.4390018484288354) internal successors, (29583), 20558 states have internal predecessors, (29583), 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) [2022-11-22 02:35:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20559 states to 20559 states and 29583 transitions. [2022-11-22 02:35:32,238 INFO L78 Accepts]: Start accepts. Automaton has 20559 states and 29583 transitions. Word has length 76 [2022-11-22 02:35:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:35:32,239 INFO L495 AbstractCegarLoop]: Abstraction has 20559 states and 29583 transitions. [2022-11-22 02:35:32,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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) [2022-11-22 02:35:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 20559 states and 29583 transitions. [2022-11-22 02:35:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 02:35:32,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:35:32,241 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:35:32,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:35:32,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:35:32,448 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:35:32,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:35:32,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1639058183, now seen corresponding path program 1 times [2022-11-22 02:35:32,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:35:32,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744867677] [2022-11-22 02:35:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:32,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:35:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:35:33,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:35:33,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744867677] [2022-11-22 02:35:33,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744867677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:35:33,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005243824] [2022-11-22 02:35:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:33,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:35:33,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:35:33,408 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:35:33,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:35:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:33,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:35:33,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:35:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:35:34,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:35:34,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005243824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:35:34,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:35:34,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2022-11-22 02:35:34,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061424826] [2022-11-22 02:35:34,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:35:34,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:35:34,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:35:34,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:35:34,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:35:34,262 INFO L87 Difference]: Start difference. First operand 20559 states and 29583 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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) [2022-11-22 02:35:43,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:35:43,372 INFO L93 Difference]: Finished difference Result 48663 states and 69901 transitions. [2022-11-22 02:35:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:35:43,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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 76 [2022-11-22 02:35:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:35:43,448 INFO L225 Difference]: With dead ends: 48663 [2022-11-22 02:35:43,448 INFO L226 Difference]: Without dead ends: 38145 [2022-11-22 02:35:43,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:35:43,460 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 369 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:35:43,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 429 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:35:43,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38145 states. [2022-11-22 02:35:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38145 to 30525. [2022-11-22 02:35:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30525 states, 30524 states have (on average 1.426942733586686) internal successors, (43556), 30524 states have internal predecessors, (43556), 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) [2022-11-22 02:35:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30525 states to 30525 states and 43556 transitions. [2022-11-22 02:35:51,150 INFO L78 Accepts]: Start accepts. Automaton has 30525 states and 43556 transitions. Word has length 76 [2022-11-22 02:35:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:35:51,151 INFO L495 AbstractCegarLoop]: Abstraction has 30525 states and 43556 transitions. [2022-11-22 02:35:51,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 5 states have internal predecessors, (74), 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) [2022-11-22 02:35:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 30525 states and 43556 transitions. [2022-11-22 02:35:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 02:35:51,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:35:51,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:35:51,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 02:35:51,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:35:51,359 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:35:51,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:35:51,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1006096199, now seen corresponding path program 1 times [2022-11-22 02:35:51,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:35:51,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799332510] [2022-11-22 02:35:51,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:51,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:35:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:35:52,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:35:52,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799332510] [2022-11-22 02:35:52,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799332510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:35:52,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455062583] [2022-11-22 02:35:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:35:52,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:35:52,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:35:52,293 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:35:52,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0fb21b8-ad55-441b-817b-7fa1615c435f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:35:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:35:52,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-22 02:35:52,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:35:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:35:54,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:36:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:36:00,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455062583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:36:00,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216930485] [2022-11-22 02:36:00,534 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-22 02:36:00,534 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:36:00,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:36:00,543 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:36:00,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:36:01,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:36:01,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:36:01,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-22 02:36:01,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:01,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:01,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:36:01,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-22 02:36:01,281 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 02:36:11,094 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6