./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS --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 e806b2de9400f1b211ac03466f80bb324cfea44da3c1d913127efd4a407821e8 --- 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-8393723 [2022-11-19 08:00:32,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:00:32,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:00:32,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:00:32,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:00:32,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:00:32,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:00:32,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:00:32,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:00:32,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:00:32,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:00:32,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:00:32,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:00:32,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:00:32,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:00:32,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:00:32,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:00:32,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:00:32,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:00:32,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:00:32,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:00:32,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:00:32,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:00:32,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:00:32,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:00:32,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:00:32,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:00:32,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:00:32,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:00:32,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:00:32,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:00:32,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:00:32,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:00:32,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:00:32,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:00:32,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:00:32,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:00:32,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:00:32,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:00:32,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:00:32,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:00:32,522 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:00:32,546 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:00:32,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:00:32,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:00:32,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:00:32,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:00:32,547 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:00:32,548 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:00:32,548 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:00:32,548 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:00:32,548 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:00:32,549 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:00:32,549 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:00:32,549 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:00:32,549 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:00:32,549 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:00:32,550 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:00:32,550 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:00:32,550 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:00:32,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:00:32,551 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:00:32,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:00:32,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:00:32,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:00:32,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:00:32,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:00:32,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:00:32,552 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:00:32,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:00:32,553 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:00:32,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:00:32,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:00:32,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:00:32,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:00:32,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:00:32,554 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:00:32,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:00:32,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:00:32,554 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:00:32,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:00:32,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:00:32,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:00:32,555 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_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e806b2de9400f1b211ac03466f80bb324cfea44da3c1d913127efd4a407821e8 [2022-11-19 08:00:32,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:00:32,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:00:32,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:00:32,822 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:00:32,822 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:00:32,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-19 08:00:32,895 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/data/d91eb0e73/d37cffe5f4f64cdbab64c33d1d7d71b0/FLAG169c1e106 [2022-11-19 08:00:33,340 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:00:33,340 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-19 08:00:33,357 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/data/d91eb0e73/d37cffe5f4f64cdbab64c33d1d7d71b0/FLAG169c1e106 [2022-11-19 08:00:33,713 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/data/d91eb0e73/d37cffe5f4f64cdbab64c33d1d7d71b0 [2022-11-19 08:00:33,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:00:33,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:00:33,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:00:33,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:00:33,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:00:33,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:33" (1/1) ... [2022-11-19 08:00:33,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6deb7000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:33, skipping insertion in model container [2022-11-19 08:00:33,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:33" (1/1) ... [2022-11-19 08:00:33,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:00:33,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:00:34,064 WARN L234 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_a7b00d66-2348-41c6-91ab-58ef83253a93/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7399,7412] [2022-11-19 08:00:34,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:00:34,116 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:00:34,161 WARN L234 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_a7b00d66-2348-41c6-91ab-58ef83253a93/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7399,7412] [2022-11-19 08:00:34,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:00:34,226 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:00:34,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34 WrapperNode [2022-11-19 08:00:34,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:00:34,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:00:34,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:00:34,230 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:00:34,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2022-11-19 08:00:34,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2022-11-19 08:00:34,310 INFO L138 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 619 [2022-11-19 08:00:34,310 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:00:34,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:00:34,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:00:34,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:00:34,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2022-11-19 08:00:34,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2022-11-19 08:00:34,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2022-11-19 08:00:34,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2022-11-19 08:00:34,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2022-11-19 08:00:34,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2022-11-19 08:00:34,343 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2022-11-19 08:00:34,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2022-11-19 08:00:34,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:00:34,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:00:34,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:00:34,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:00:34,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (1/1) ... [2022-11-19 08:00:34,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:00:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:34,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:00:34,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:00:34,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:00:34,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:00:34,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:00:34,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:00:34,656 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:00:34,658 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:00:35,359 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:00:35,647 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:00:35,658 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 08:00:35,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:35 BoogieIcfgContainer [2022-11-19 08:00:35,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:00:35,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:00:35,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:00:35,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:00:35,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:33" (1/3) ... [2022-11-19 08:00:35,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767314b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:35, skipping insertion in model container [2022-11-19 08:00:35,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:34" (2/3) ... [2022-11-19 08:00:35,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767314b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:35, skipping insertion in model container [2022-11-19 08:00:35,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:35" (3/3) ... [2022-11-19 08:00:35,672 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-11-19 08:00:35,698 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:00:35,699 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:00:35,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:00:35,805 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;@328138e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:00:35,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:00:35,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 127 states, 125 states have (on average 1.688) internal successors, (211), 126 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:35,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 08:00:35,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:35,826 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] [2022-11-19 08:00:35,827 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1291372094, now seen corresponding path program 1 times [2022-11-19 08:00:35,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:35,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001912774] [2022-11-19 08:00:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:35,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:36,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:36,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001912774] [2022-11-19 08:00:36,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001912774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:36,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:36,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:00:36,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087417583] [2022-11-19 08:00:36,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:36,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:00:36,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:36,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:00:36,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:00:36,470 INFO L87 Difference]: Start difference. First operand has 127 states, 125 states have (on average 1.688) internal successors, (211), 126 states have internal predecessors, (211), 0 states have call successors, (0), 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 19.333333333333332) internal successors, (58), 3 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) [2022-11-19 08:00:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:36,651 INFO L93 Difference]: Finished difference Result 284 states and 446 transitions. [2022-11-19 08:00:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:00:36,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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 [2022-11-19 08:00:36,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:36,673 INFO L225 Difference]: With dead ends: 284 [2022-11-19 08:00:36,673 INFO L226 Difference]: Without dead ends: 196 [2022-11-19 08:00:36,678 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 [2022-11-19 08:00:36,684 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 158 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:36,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 407 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:00:36,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-19 08:00:36,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2022-11-19 08:00:36,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.4093264248704662) internal successors, (272), 193 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:36,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 272 transitions. [2022-11-19 08:00:36,774 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 272 transitions. Word has length 58 [2022-11-19 08:00:36,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:36,775 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 272 transitions. [2022-11-19 08:00:36,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2022-11-19 08:00:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 272 transitions. [2022-11-19 08:00:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 08:00:36,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:36,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:36,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:00:36,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:36,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash 381868271, now seen corresponding path program 1 times [2022-11-19 08:00:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:36,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496894206] [2022-11-19 08:00:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:36,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:36,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:36,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496894206] [2022-11-19 08:00:36,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496894206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:36,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:36,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:00:36,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587402593] [2022-11-19 08:00:36,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:36,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:00:36,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:36,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:00:36,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:00:36,969 INFO L87 Difference]: Start difference. First operand 194 states and 272 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:37,109 INFO L93 Difference]: Finished difference Result 474 states and 696 transitions. [2022-11-19 08:00:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:00:37,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2022-11-19 08:00:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:37,113 INFO L225 Difference]: With dead ends: 474 [2022-11-19 08:00:37,114 INFO L226 Difference]: Without dead ends: 323 [2022-11-19 08:00:37,119 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 [2022-11-19 08:00:37,122 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 116 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:37,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 345 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:00:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-19 08:00:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 321. [2022-11-19 08:00:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.45) internal successors, (464), 320 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 464 transitions. [2022-11-19 08:00:37,196 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 464 transitions. Word has length 61 [2022-11-19 08:00:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:37,197 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 464 transitions. [2022-11-19 08:00:37,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:37,199 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 464 transitions. [2022-11-19 08:00:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 08:00:37,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:37,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:37,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:00:37,204 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash 40937796, now seen corresponding path program 1 times [2022-11-19 08:00:37,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:37,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282372288] [2022-11-19 08:00:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:37,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:37,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:37,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282372288] [2022-11-19 08:00:37,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282372288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:37,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:37,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:00:37,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023277970] [2022-11-19 08:00:37,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:37,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:00:37,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:37,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:00:37,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:00:37,339 INFO L87 Difference]: Start difference. First operand 321 states and 464 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:37,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:37,448 INFO L93 Difference]: Finished difference Result 833 states and 1238 transitions. [2022-11-19 08:00:37,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:00:37,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2022-11-19 08:00:37,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:37,454 INFO L225 Difference]: With dead ends: 833 [2022-11-19 08:00:37,454 INFO L226 Difference]: Without dead ends: 555 [2022-11-19 08:00:37,461 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 [2022-11-19 08:00:37,466 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 111 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:37,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 330 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:00:37,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-11-19 08:00:37,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 553. [2022-11-19 08:00:37,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.4710144927536233) internal successors, (812), 552 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:37,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 812 transitions. [2022-11-19 08:00:37,573 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 812 transitions. Word has length 64 [2022-11-19 08:00:37,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:37,573 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 812 transitions. [2022-11-19 08:00:37,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 812 transitions. [2022-11-19 08:00:37,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:00:37,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:37,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:37,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:00:37,576 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:37,577 INFO L85 PathProgramCache]: Analyzing trace with hash 409037512, now seen corresponding path program 1 times [2022-11-19 08:00:37,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:37,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633504158] [2022-11-19 08:00:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:37,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:37,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:37,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633504158] [2022-11-19 08:00:37,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633504158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:37,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:37,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:00:37,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894998277] [2022-11-19 08:00:37,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:37,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:00:37,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:37,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:00:37,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:00:37,668 INFO L87 Difference]: Start difference. First operand 553 states and 812 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:37,848 INFO L93 Difference]: Finished difference Result 1485 states and 2214 transitions. [2022-11-19 08:00:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:00:37,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2022-11-19 08:00:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:37,853 INFO L225 Difference]: With dead ends: 1485 [2022-11-19 08:00:37,853 INFO L226 Difference]: Without dead ends: 975 [2022-11-19 08:00:37,854 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 [2022-11-19 08:00:37,861 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 106 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:37,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 315 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:00:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-11-19 08:00:37,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 973. [2022-11-19 08:00:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 1.477366255144033) internal successors, (1436), 972 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1436 transitions. [2022-11-19 08:00:38,000 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1436 transitions. Word has length 67 [2022-11-19 08:00:38,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:38,001 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1436 transitions. [2022-11-19 08:00:38,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:38,001 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1436 transitions. [2022-11-19 08:00:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 08:00:38,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:38,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:38,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:00:38,007 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:38,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:38,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1680750051, now seen corresponding path program 1 times [2022-11-19 08:00:38,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:38,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132544054] [2022-11-19 08:00:38,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:38,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:38,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:38,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132544054] [2022-11-19 08:00:38,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132544054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:38,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:38,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:00:38,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988453795] [2022-11-19 08:00:38,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:38,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:00:38,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:38,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:00:38,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:00:38,124 INFO L87 Difference]: Start difference. First operand 973 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:38,468 INFO L93 Difference]: Finished difference Result 2657 states and 3950 transitions. [2022-11-19 08:00:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:00:38,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 [2022-11-19 08:00:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:38,476 INFO L225 Difference]: With dead ends: 2657 [2022-11-19 08:00:38,476 INFO L226 Difference]: Without dead ends: 1727 [2022-11-19 08:00:38,477 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 [2022-11-19 08:00:38,478 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 101 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:38,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 300 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:00:38,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-11-19 08:00:38,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1725. [2022-11-19 08:00:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.4733178654292343) internal successors, (2540), 1724 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2540 transitions. [2022-11-19 08:00:38,770 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2540 transitions. Word has length 70 [2022-11-19 08:00:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:38,771 INFO L495 AbstractCegarLoop]: Abstraction has 1725 states and 2540 transitions. [2022-11-19 08:00:38,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2540 transitions. [2022-11-19 08:00:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 08:00:38,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:38,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:38,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:00:38,773 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:38,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1203841107, now seen corresponding path program 1 times [2022-11-19 08:00:38,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:38,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515401189] [2022-11-19 08:00:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:38,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:38,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:38,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515401189] [2022-11-19 08:00:38,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515401189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:38,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:38,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:00:38,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568968951] [2022-11-19 08:00:38,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:38,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:00:38,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:38,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:00:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:00:38,861 INFO L87 Difference]: Start difference. First operand 1725 states and 2540 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:39,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:39,371 INFO L93 Difference]: Finished difference Result 4737 states and 6990 transitions. [2022-11-19 08:00:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:00:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 [2022-11-19 08:00:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:39,383 INFO L225 Difference]: With dead ends: 4737 [2022-11-19 08:00:39,383 INFO L226 Difference]: Without dead ends: 3055 [2022-11-19 08:00:39,385 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 [2022-11-19 08:00:39,386 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 96 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:39,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 285 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:00:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2022-11-19 08:00:39,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 3053. [2022-11-19 08:00:39,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 1.4613368283093053) internal successors, (4460), 3052 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 4460 transitions. [2022-11-19 08:00:39,903 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 4460 transitions. Word has length 73 [2022-11-19 08:00:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:39,904 INFO L495 AbstractCegarLoop]: Abstraction has 3053 states and 4460 transitions. [2022-11-19 08:00:39,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 4460 transitions. [2022-11-19 08:00:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 08:00:39,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:39,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:39,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:00:39,906 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:39,907 INFO L85 PathProgramCache]: Analyzing trace with hash 349706559, now seen corresponding path program 1 times [2022-11-19 08:00:39,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:39,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327016812] [2022-11-19 08:00:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:39,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:40,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:40,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327016812] [2022-11-19 08:00:40,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327016812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:40,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:40,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:00:40,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463079855] [2022-11-19 08:00:40,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:40,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:00:40,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:40,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:00:40,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:00:40,351 INFO L87 Difference]: Start difference. First operand 3053 states and 4460 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:43,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:43,748 INFO L93 Difference]: Finished difference Result 18233 states and 26546 transitions. [2022-11-19 08:00:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:00:43,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2022-11-19 08:00:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:43,814 INFO L225 Difference]: With dead ends: 18233 [2022-11-19 08:00:43,815 INFO L226 Difference]: Without dead ends: 15223 [2022-11-19 08:00:43,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:00:43,829 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 635 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:43,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 1109 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:00:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15223 states. [2022-11-19 08:00:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15223 to 15213. [2022-11-19 08:00:46,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15213 states, 15212 states have (on average 1.4522745201156981) internal successors, (22092), 15212 states have internal predecessors, (22092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15213 states to 15213 states and 22092 transitions. [2022-11-19 08:00:46,920 INFO L78 Accepts]: Start accepts. Automaton has 15213 states and 22092 transitions. Word has length 76 [2022-11-19 08:00:46,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:46,920 INFO L495 AbstractCegarLoop]: Abstraction has 15213 states and 22092 transitions. [2022-11-19 08:00:46,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:46,921 INFO L276 IsEmpty]: Start isEmpty. Operand 15213 states and 22092 transitions. [2022-11-19 08:00:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-19 08:00:46,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:46,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:46,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:00:46,923 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:46,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:46,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1702218856, now seen corresponding path program 1 times [2022-11-19 08:00:46,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:46,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340497775] [2022-11-19 08:00:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:46,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:47,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:47,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340497775] [2022-11-19 08:00:47,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340497775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:47,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:47,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:00:47,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347993238] [2022-11-19 08:00:47,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:47,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:00:47,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:47,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:00:47,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:00:47,075 INFO L87 Difference]: Start difference. First operand 15213 states and 22092 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:51,336 INFO L93 Difference]: Finished difference Result 38947 states and 56768 transitions. [2022-11-19 08:00:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:00:51,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2022-11-19 08:00:51,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:51,408 INFO L225 Difference]: With dead ends: 38947 [2022-11-19 08:00:51,409 INFO L226 Difference]: Without dead ends: 23777 [2022-11-19 08:00:51,428 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 [2022-11-19 08:00:51,429 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 678 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:51,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 163 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:00:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23777 states. [2022-11-19 08:00:54,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23777 to 23775. [2022-11-19 08:00:54,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23775 states, 23774 states have (on average 1.4455287288634644) internal successors, (34366), 23774 states have internal predecessors, (34366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23775 states to 23775 states and 34366 transitions. [2022-11-19 08:00:54,955 INFO L78 Accepts]: Start accepts. Automaton has 23775 states and 34366 transitions. Word has length 78 [2022-11-19 08:00:54,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:54,955 INFO L495 AbstractCegarLoop]: Abstraction has 23775 states and 34366 transitions. [2022-11-19 08:00:54,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 23775 states and 34366 transitions. [2022-11-19 08:00:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-19 08:00:54,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:54,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:54,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:00:54,958 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:00:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:54,958 INFO L85 PathProgramCache]: Analyzing trace with hash -742634483, now seen corresponding path program 1 times [2022-11-19 08:00:54,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:54,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049485732] [2022-11-19 08:00:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:54,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:55,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:55,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049485732] [2022-11-19 08:00:55,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049485732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:55,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:55,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-19 08:00:55,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310848670] [2022-11-19 08:00:55,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:55,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:00:55,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:55,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:00:55,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:00:55,566 INFO L87 Difference]: Start difference. First operand 23775 states and 34366 transitions. Second operand has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:04,216 INFO L93 Difference]: Finished difference Result 44764 states and 64937 transitions. [2022-11-19 08:01:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:01:04,217 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2022-11-19 08:01:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:04,333 INFO L225 Difference]: With dead ends: 44764 [2022-11-19 08:01:04,333 INFO L226 Difference]: Without dead ends: 44762 [2022-11-19 08:01:04,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:01:04,342 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 1720 mSDsluCounter, 3318 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 3882 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:04,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1720 Valid, 3882 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:01:04,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44762 states. [2022-11-19 08:01:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44762 to 24335. [2022-11-19 08:01:08,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24335 states, 24334 states have (on average 1.445960384646996) internal successors, (35186), 24334 states have internal predecessors, (35186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24335 states to 24335 states and 35186 transitions. [2022-11-19 08:01:08,965 INFO L78 Accepts]: Start accepts. Automaton has 24335 states and 35186 transitions. Word has length 78 [2022-11-19 08:01:08,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:08,966 INFO L495 AbstractCegarLoop]: Abstraction has 24335 states and 35186 transitions. [2022-11-19 08:01:08,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.090909090909091) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 24335 states and 35186 transitions. [2022-11-19 08:01:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-19 08:01:08,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:08,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:08,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:01:08,970 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:01:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:08,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1465333773, now seen corresponding path program 1 times [2022-11-19 08:01:08,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:08,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444090474] [2022-11-19 08:01:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:08,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:11,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:11,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444090474] [2022-11-19 08:01:11,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444090474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:11,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488809849] [2022-11-19 08:01:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:11,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:11,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:11,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:11,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b00d66-2348-41c6-91ab-58ef83253a93/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:01:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:11,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-19 08:01:11,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:17,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:50,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488809849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:50,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1142157622] [2022-11-19 08:02:50,781 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-11-19 08:02:50,781 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:02:50,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:02:50,793 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:02:50,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:02:51,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:51,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 30 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2022-11-19 08:02:51,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:51,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:51,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:51,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:51,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:51,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 31 [2022-11-19 08:03:34,287 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:05:05,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '294020#(and (<= 0 ~id6~0) (<= 0 ~send5~0) (<= ~send3~0 127) (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (= ~nomsg~0 ~p4_new~0) (= ~p4~0 0) (<= ~st3~0 0) (<= 0 ~mode1~0) (<= 0 ~mode4~0) (<= 0 ~send4~0) (<= 0 ~id5~0) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 ~mode6~0) (= ~nomsg~0 ~p5_new~0) (<= 0 ~p6~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= ~st6~0 0) (<= 0 ~mode3~0) (<= (+ ~p6_old~0 1) 0) (<= ~send1~0 127) (<= ~st1~0 0) (<= 0 (+ ~p5_old~0 1)) (<= ~st5~0 0) (= ~p3_new~0 ~nomsg~0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (<= (+ ~p5_old~0 1) 0) (<= ~mode5~0 1) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_182348~0) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= ~id6~0 127) (<= ~id5~0 127) (<= 0 ~st2~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (<= 0 ~st5~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (= ~nomsg~0 ~p2_new~0) (or (and (not (< (mod ~r1~0 256) 6)) (not (= (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0 ~st6~0) 1))) (not (<= (+ ~st5~0 ~st4~0 ~st3~0 ~st2~0 ~st1~0 ~st6~0) 1))) (<= (+ |ULTIMATE.start_main_~node5__m5~0#1| 1) 0) (<= ~mode6~0 1) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= |ULTIMATE.start_main_~main__i2~0#1| 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= ~nomsg~0 ~p6_new~0) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= (+ |ULTIMATE.start_main_~node6__m6~0#1| 1) 0) (<= ~st4~0 0) (<= 0 (+ |ULTIMATE.start_main_~node5__m5~0#1| 1)) (<= ~__return_182153~0 1) (<= 0 ~id4~0) (<= 0 ~p5~0) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= 0 (+ |ULTIMATE.start_main_~node6__m6~0#1| 1)) (<= ~send5~0 127) (<= ~p6~0 0) (<= 1 ~__return_182153~0) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= 0 ~send6~0) (<= ~p2~0 0) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (<= 0 (+ ~p6_old~0 1)) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (= |ULTIMATE.start_main_~check__tmp~0#1| ~__return_182348~0) (<= 0 ~send3~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 0 ~mode5~0) (<= 0 ~st6~0) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (<= ~send6~0 127) (= |#NULL.base| 0) (<= ~p5~0 0))' at error location [2022-11-19 08:05:05,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:05:05,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:05:05,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 59 [2022-11-19 08:05:05,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190529303] [2022-11-19 08:05:05,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:05,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-19 08:05:05,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:06,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-19 08:05:06,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2684, Invalid=14872, Unknown=0, NotChecked=0, Total=17556 [2022-11-19 08:05:06,004 INFO L87 Difference]: Start difference. First operand 24335 states and 35186 transitions. Second operand has 59 states, 59 states have (on average 4.627118644067797) internal successors, (273), 59 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)