./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6fd1b86eb4bd4da10127873e4ddea09cb0ce3be9adebe9545b8e8b0c5a6a02d7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:31:05,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:31:05,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:31:05,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:31:05,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:31:05,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:31:05,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:31:05,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:31:05,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:31:05,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:31:05,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:31:05,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:31:05,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:31:05,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:31:05,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:31:05,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:31:05,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:31:05,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:31:05,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:31:05,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:31:05,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:31:05,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:31:05,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:31:05,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:31:05,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:31:05,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:31:05,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:31:05,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:31:05,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:31:05,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:31:05,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:31:05,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:31:05,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:31:05,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:31:05,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:31:05,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:31:05,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:31:05,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:31:05,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:31:05,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:31:05,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:31:05,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:31:05,361 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:31:05,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:31:05,362 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:31:05,362 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:31:05,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:31:05,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:31:05,364 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:31:05,364 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:31:05,365 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:31:05,365 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:31:05,366 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:31:05,366 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:31:05,367 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:31:05,367 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:31:05,367 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:31:05,368 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:31:05,368 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:31:05,368 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:31:05,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:31:05,369 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:31:05,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:31:05,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:31:05,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:31:05,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:31:05,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:31:05,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:31:05,372 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:31:05,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:31:05,373 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:31:05,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:31:05,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:31:05,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:31:05,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:31:05,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:31:05,375 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:31:05,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:31:05,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:31:05,375 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:31:05,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:31:05,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:31:05,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:31:05,377 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_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fd1b86eb4bd4da10127873e4ddea09cb0ce3be9adebe9545b8e8b0c5a6a02d7 [2022-11-22 00:31:05,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:31:05,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:31:05,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:31:05,728 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:31:05,729 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:31:05,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-22 00:31:08,762 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:31:09,054 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:31:09,055 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-22 00:31:09,065 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/data/fd72f4a60/053a37077d3d4641a0255fd5b0ca750e/FLAG6587ed218 [2022-11-22 00:31:09,081 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/data/fd72f4a60/053a37077d3d4641a0255fd5b0ca750e [2022-11-22 00:31:09,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:31:09,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:31:09,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:31:09,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:31:09,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:31:09,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:31:09" (1/1) ... [2022-11-22 00:31:09,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cac7c30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09, skipping insertion in model container [2022-11-22 00:31:09,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:31:09" (1/1) ... [2022-11-22 00:31:09,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:31:09,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:31:09,380 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7806,7819] [2022-11-22 00:31:09,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:31:09,455 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:31:09,510 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7806,7819] [2022-11-22 00:31:09,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:31:09,554 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:31:09,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09 WrapperNode [2022-11-22 00:31:09,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:31:09,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:31:09,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:31:09,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:31:09,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09" (1/1) ... [2022-11-22 00:31:09,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09" (1/1) ... [2022-11-22 00:31:09,656 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 633 [2022-11-22 00:31:09,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:31:09,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:31:09,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:31:09,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:31:09,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09" (1/1) ... [2022-11-22 00:31:09,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09" (1/1) ... [2022-11-22 00:31:09,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09" (1/1) ... [2022-11-22 00:31:09,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09" (1/1) ... [2022-11-22 00:31:09,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09" (1/1) ... [2022-11-22 00:31:09,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09" (1/1) ... [2022-11-22 00:31:09,704 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09" (1/1) ... [2022-11-22 00:31:09,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09" (1/1) ... [2022-11-22 00:31:09,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:31:09,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:31:09,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:31:09,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:31:09,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09" (1/1) ... [2022-11-22 00:31:09,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:31:09,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:09,762 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:31:09,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:31:09,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:31:09,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:31:09,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:31:09,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:31:09,999 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:31:10,001 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:31:10,751 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:31:11,237 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:31:11,237 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 00:31:11,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:31:11 BoogieIcfgContainer [2022-11-22 00:31:11,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:31:11,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:31:11,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:31:11,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:31:11,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:31:09" (1/3) ... [2022-11-22 00:31:11,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500f4e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:31:11, skipping insertion in model container [2022-11-22 00:31:11,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:09" (2/3) ... [2022-11-22 00:31:11,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500f4e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:31:11, skipping insertion in model container [2022-11-22 00:31:11,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:31:11" (3/3) ... [2022-11-22 00:31:11,251 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-22 00:31:11,271 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:31:11,271 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:31:11,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:31:11,346 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;@7045acb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:31:11,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:31:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 96 states have (on average 1.7708333333333333) internal successors, (170), 97 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 00:31:11,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:11,359 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] [2022-11-22 00:31:11,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:11,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:11,364 INFO L85 PathProgramCache]: Analyzing trace with hash 566108884, now seen corresponding path program 1 times [2022-11-22 00:31:11,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:11,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607419636] [2022-11-22 00:31:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:11,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:11,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:11,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607419636] [2022-11-22 00:31:11,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607419636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:11,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:11,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:11,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444645736] [2022-11-22 00:31:11,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:11,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:11,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:12,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:12,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:12,023 INFO L87 Difference]: Start difference. First operand has 98 states, 96 states have (on average 1.7708333333333333) internal successors, (170), 97 states have internal predecessors, (170), 0 states have call successors, (0), 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 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:12,120 INFO L93 Difference]: Finished difference Result 216 states and 361 transitions. [2022-11-22 00:31:12,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:12,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2022-11-22 00:31:12,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:12,133 INFO L225 Difference]: With dead ends: 216 [2022-11-22 00:31:12,133 INFO L226 Difference]: Without dead ends: 146 [2022-11-22 00:31:12,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:12,140 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 109 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:12,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 362 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-22 00:31:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-11-22 00:31:12,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.5034965034965035) internal successors, (215), 143 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 215 transitions. [2022-11-22 00:31:12,203 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 215 transitions. Word has length 43 [2022-11-22 00:31:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:12,204 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 215 transitions. [2022-11-22 00:31:12,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 215 transitions. [2022-11-22 00:31:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 00:31:12,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:12,207 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] [2022-11-22 00:31:12,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:31:12,207 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1914990475, now seen corresponding path program 1 times [2022-11-22 00:31:12,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:12,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102065467] [2022-11-22 00:31:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:12,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:12,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:12,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102065467] [2022-11-22 00:31:12,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102065467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:12,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:12,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:12,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592972798] [2022-11-22 00:31:12,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:12,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:12,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:12,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:12,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:12,425 INFO L87 Difference]: Start difference. First operand 144 states and 215 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:12,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:12,569 INFO L93 Difference]: Finished difference Result 309 states and 482 transitions. [2022-11-22 00:31:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:12,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2022-11-22 00:31:12,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:12,571 INFO L225 Difference]: With dead ends: 309 [2022-11-22 00:31:12,572 INFO L226 Difference]: Without dead ends: 197 [2022-11-22 00:31:12,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:12,574 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 95 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:12,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 205 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-22 00:31:12,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2022-11-22 00:31:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.5154639175257731) internal successors, (294), 194 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 294 transitions. [2022-11-22 00:31:12,637 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 294 transitions. Word has length 45 [2022-11-22 00:31:12,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:12,638 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 294 transitions. [2022-11-22 00:31:12,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:12,639 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 294 transitions. [2022-11-22 00:31:12,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 00:31:12,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:12,643 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] [2022-11-22 00:31:12,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:31:12,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:12,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1398553194, now seen corresponding path program 1 times [2022-11-22 00:31:12,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:12,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681832989] [2022-11-22 00:31:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:12,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:12,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681832989] [2022-11-22 00:31:12,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681832989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:12,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:12,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:12,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774023913] [2022-11-22 00:31:12,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:12,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:12,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:12,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:12,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:12,803 INFO L87 Difference]: Start difference. First operand 195 states and 294 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:12,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:12,898 INFO L93 Difference]: Finished difference Result 475 states and 745 transitions. [2022-11-22 00:31:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:12,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-11-22 00:31:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:12,905 INFO L225 Difference]: With dead ends: 475 [2022-11-22 00:31:12,906 INFO L226 Difference]: Without dead ends: 314 [2022-11-22 00:31:12,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:12,916 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 95 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:12,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 276 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-22 00:31:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2022-11-22 00:31:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.5466237942122187) internal successors, (481), 311 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:12,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 481 transitions. [2022-11-22 00:31:12,971 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 481 transitions. Word has length 47 [2022-11-22 00:31:12,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:12,972 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 481 transitions. [2022-11-22 00:31:12,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 481 transitions. [2022-11-22 00:31:12,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 00:31:12,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:12,976 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] [2022-11-22 00:31:12,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:31:12,977 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:12,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1696286242, now seen corresponding path program 1 times [2022-11-22 00:31:12,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:12,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96073841] [2022-11-22 00:31:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:12,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:13,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:13,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96073841] [2022-11-22 00:31:13,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96073841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:13,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:13,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:13,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215979267] [2022-11-22 00:31:13,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:13,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:13,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:13,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:13,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:13,098 INFO L87 Difference]: Start difference. First operand 312 states and 481 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:13,168 INFO L93 Difference]: Finished difference Result 767 states and 1212 transitions. [2022-11-22 00:31:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:13,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2022-11-22 00:31:13,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:13,171 INFO L225 Difference]: With dead ends: 767 [2022-11-22 00:31:13,172 INFO L226 Difference]: Without dead ends: 489 [2022-11-22 00:31:13,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:13,174 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 94 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:13,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 241 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:13,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-11-22 00:31:13,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 487. [2022-11-22 00:31:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.5658436213991769) internal successors, (761), 486 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 761 transitions. [2022-11-22 00:31:13,217 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 761 transitions. Word has length 49 [2022-11-22 00:31:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:13,217 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 761 transitions. [2022-11-22 00:31:13,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 761 transitions. [2022-11-22 00:31:13,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 00:31:13,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:13,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:13,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:31:13,220 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:13,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:13,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2030005373, now seen corresponding path program 1 times [2022-11-22 00:31:13,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:13,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246469850] [2022-11-22 00:31:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:13,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:13,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:13,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246469850] [2022-11-22 00:31:13,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246469850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:13,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:13,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:13,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094588779] [2022-11-22 00:31:13,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:13,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:13,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:13,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:13,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:13,290 INFO L87 Difference]: Start difference. First operand 487 states and 761 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:13,402 INFO L93 Difference]: Finished difference Result 1235 states and 1960 transitions. [2022-11-22 00:31:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:13,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-22 00:31:13,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:13,407 INFO L225 Difference]: With dead ends: 1235 [2022-11-22 00:31:13,407 INFO L226 Difference]: Without dead ends: 798 [2022-11-22 00:31:13,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:13,410 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 89 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:13,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 252 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-11-22 00:31:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 796. [2022-11-22 00:31:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 1.568553459119497) internal successors, (1247), 795 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1247 transitions. [2022-11-22 00:31:13,530 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1247 transitions. Word has length 51 [2022-11-22 00:31:13,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:13,531 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1247 transitions. [2022-11-22 00:31:13,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:13,531 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1247 transitions. [2022-11-22 00:31:13,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 00:31:13,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:13,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:13,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:31:13,533 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:13,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:13,534 INFO L85 PathProgramCache]: Analyzing trace with hash -745174181, now seen corresponding path program 1 times [2022-11-22 00:31:13,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:13,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827248726] [2022-11-22 00:31:13,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:13,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:13,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:13,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827248726] [2022-11-22 00:31:13,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827248726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:13,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:13,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:13,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401882462] [2022-11-22 00:31:13,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:13,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:13,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:13,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:13,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:13,656 INFO L87 Difference]: Start difference. First operand 796 states and 1247 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:13,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:13,855 INFO L93 Difference]: Finished difference Result 1995 states and 3163 transitions. [2022-11-22 00:31:13,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:13,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-22 00:31:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:13,864 INFO L225 Difference]: With dead ends: 1995 [2022-11-22 00:31:13,864 INFO L226 Difference]: Without dead ends: 1249 [2022-11-22 00:31:13,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:13,867 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 88 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:13,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 243 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-11-22 00:31:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1247. [2022-11-22 00:31:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 1.5762439807383628) internal successors, (1964), 1246 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1964 transitions. [2022-11-22 00:31:14,012 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1964 transitions. Word has length 53 [2022-11-22 00:31:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:14,012 INFO L495 AbstractCegarLoop]: Abstraction has 1247 states and 1964 transitions. [2022-11-22 00:31:14,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1964 transitions. [2022-11-22 00:31:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-22 00:31:14,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:14,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:14,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:31:14,014 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:14,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:14,015 INFO L85 PathProgramCache]: Analyzing trace with hash -585568132, now seen corresponding path program 1 times [2022-11-22 00:31:14,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:14,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168114672] [2022-11-22 00:31:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:14,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:14,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:14,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168114672] [2022-11-22 00:31:14,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168114672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:14,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:14,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:31:14,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468114490] [2022-11-22 00:31:14,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:14,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:14,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:14,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:14,151 INFO L87 Difference]: Start difference. First operand 1247 states and 1964 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:14,672 INFO L93 Difference]: Finished difference Result 3944 states and 6219 transitions. [2022-11-22 00:31:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:31:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-22 00:31:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:14,683 INFO L225 Difference]: With dead ends: 3944 [2022-11-22 00:31:14,683 INFO L226 Difference]: Without dead ends: 2763 [2022-11-22 00:31:14,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:31:14,686 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 549 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:14,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 959 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:31:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2022-11-22 00:31:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 1985. [2022-11-22 00:31:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 1.5665322580645162) internal successors, (3108), 1984 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 3108 transitions. [2022-11-22 00:31:14,913 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 3108 transitions. Word has length 55 [2022-11-22 00:31:14,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:14,915 INFO L495 AbstractCegarLoop]: Abstraction has 1985 states and 3108 transitions. [2022-11-22 00:31:14,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 3108 transitions. [2022-11-22 00:31:14,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 00:31:14,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:14,918 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] [2022-11-22 00:31:14,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 00:31:14,919 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:14,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:14,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1035247094, now seen corresponding path program 1 times [2022-11-22 00:31:14,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:14,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252581140] [2022-11-22 00:31:14,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:14,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:15,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:15,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252581140] [2022-11-22 00:31:15,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252581140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:15,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:15,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:15,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984672620] [2022-11-22 00:31:15,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:15,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:15,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:15,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:15,065 INFO L87 Difference]: Start difference. First operand 1985 states and 3108 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:15,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:15,422 INFO L93 Difference]: Finished difference Result 4674 states and 7329 transitions. [2022-11-22 00:31:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:31:15,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2022-11-22 00:31:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:15,436 INFO L225 Difference]: With dead ends: 4674 [2022-11-22 00:31:15,436 INFO L226 Difference]: Without dead ends: 2755 [2022-11-22 00:31:15,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:15,443 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 182 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:15,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 347 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2022-11-22 00:31:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2753. [2022-11-22 00:31:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 1.5588662790697674) internal successors, (4290), 2752 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:15,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 4290 transitions. [2022-11-22 00:31:15,807 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 4290 transitions. Word has length 56 [2022-11-22 00:31:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:15,809 INFO L495 AbstractCegarLoop]: Abstraction has 2753 states and 4290 transitions. [2022-11-22 00:31:15,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 4290 transitions. [2022-11-22 00:31:15,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-22 00:31:15,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:15,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:15,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 00:31:15,812 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:15,813 INFO L85 PathProgramCache]: Analyzing trace with hash -2085835005, now seen corresponding path program 1 times [2022-11-22 00:31:15,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:15,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125808673] [2022-11-22 00:31:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:15,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:15,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:15,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125808673] [2022-11-22 00:31:15,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125808673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:15,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:15,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:15,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378065688] [2022-11-22 00:31:15,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:15,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:15,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:15,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:15,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:15,930 INFO L87 Difference]: Start difference. First operand 2753 states and 4290 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:16,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:16,291 INFO L93 Difference]: Finished difference Result 5442 states and 8499 transitions. [2022-11-22 00:31:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:31:16,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-22 00:31:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:16,302 INFO L225 Difference]: With dead ends: 5442 [2022-11-22 00:31:16,303 INFO L226 Difference]: Without dead ends: 2755 [2022-11-22 00:31:16,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:16,308 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 190 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:16,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 353 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:16,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2022-11-22 00:31:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2753. [2022-11-22 00:31:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 1.552688953488372) internal successors, (4273), 2752 states have internal predecessors, (4273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:16,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 4273 transitions. [2022-11-22 00:31:16,615 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 4273 transitions. Word has length 57 [2022-11-22 00:31:16,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:16,616 INFO L495 AbstractCegarLoop]: Abstraction has 2753 states and 4273 transitions. [2022-11-22 00:31:16,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 4273 transitions. [2022-11-22 00:31:16,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 00:31:16,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:16,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:16,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:31:16,617 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:16,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:16,622 INFO L85 PathProgramCache]: Analyzing trace with hash -289763855, now seen corresponding path program 1 times [2022-11-22 00:31:16,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:16,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219028994] [2022-11-22 00:31:16,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:16,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:16,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:16,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219028994] [2022-11-22 00:31:16,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219028994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:16,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:16,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:16,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043434388] [2022-11-22 00:31:16,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:16,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:16,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:16,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:16,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:16,736 INFO L87 Difference]: Start difference. First operand 2753 states and 4273 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:17,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:17,096 INFO L93 Difference]: Finished difference Result 5442 states and 8465 transitions. [2022-11-22 00:31:17,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:31:17,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-22 00:31:17,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:17,106 INFO L225 Difference]: With dead ends: 5442 [2022-11-22 00:31:17,106 INFO L226 Difference]: Without dead ends: 2755 [2022-11-22 00:31:17,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:17,110 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 188 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:17,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 356 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2022-11-22 00:31:17,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2753. [2022-11-22 00:31:17,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 1.5465116279069768) internal successors, (4256), 2752 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 4256 transitions. [2022-11-22 00:31:17,398 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 4256 transitions. Word has length 58 [2022-11-22 00:31:17,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:17,399 INFO L495 AbstractCegarLoop]: Abstraction has 2753 states and 4256 transitions. [2022-11-22 00:31:17,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 4256 transitions. [2022-11-22 00:31:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 00:31:17,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:17,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:17,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 00:31:17,401 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:17,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:17,402 INFO L85 PathProgramCache]: Analyzing trace with hash -807501630, now seen corresponding path program 1 times [2022-11-22 00:31:17,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:17,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133637189] [2022-11-22 00:31:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:17,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:17,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:17,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133637189] [2022-11-22 00:31:17,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133637189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:17,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:17,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:31:17,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317978455] [2022-11-22 00:31:17,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:17,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:17,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:17,621 INFO L87 Difference]: Start difference. First operand 2753 states and 4256 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:18,069 INFO L93 Difference]: Finished difference Result 5442 states and 8431 transitions. [2022-11-22 00:31:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:18,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-22 00:31:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:18,080 INFO L225 Difference]: With dead ends: 5442 [2022-11-22 00:31:18,080 INFO L226 Difference]: Without dead ends: 2755 [2022-11-22 00:31:18,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:31:18,085 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 145 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:18,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 448 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:18,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2022-11-22 00:31:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2753. [2022-11-22 00:31:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 1.5421511627906976) internal successors, (4244), 2752 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 4244 transitions. [2022-11-22 00:31:18,395 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 4244 transitions. Word has length 60 [2022-11-22 00:31:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:18,396 INFO L495 AbstractCegarLoop]: Abstraction has 2753 states and 4244 transitions. [2022-11-22 00:31:18,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 4244 transitions. [2022-11-22 00:31:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 00:31:18,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:18,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:18,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 00:31:18,398 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:18,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:18,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2077186613, now seen corresponding path program 1 times [2022-11-22 00:31:18,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:18,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887666066] [2022-11-22 00:31:18,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:18,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:18,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:18,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887666066] [2022-11-22 00:31:18,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887666066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:18,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:18,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:31:18,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397618997] [2022-11-22 00:31:18,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:18,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:18,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:18,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:18,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:18,596 INFO L87 Difference]: Start difference. First operand 2753 states and 4244 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:19,193 INFO L93 Difference]: Finished difference Result 7105 states and 10944 transitions. [2022-11-22 00:31:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:19,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-22 00:31:19,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:19,210 INFO L225 Difference]: With dead ends: 7105 [2022-11-22 00:31:19,210 INFO L226 Difference]: Without dead ends: 4418 [2022-11-22 00:31:19,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:31:19,214 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 290 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:19,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 361 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2022-11-22 00:31:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 4416. [2022-11-22 00:31:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4416 states, 4415 states have (on average 1.5322763306908267) internal successors, (6765), 4415 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4416 states to 4416 states and 6765 transitions. [2022-11-22 00:31:19,834 INFO L78 Accepts]: Start accepts. Automaton has 4416 states and 6765 transitions. Word has length 63 [2022-11-22 00:31:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:19,835 INFO L495 AbstractCegarLoop]: Abstraction has 4416 states and 6765 transitions. [2022-11-22 00:31:19,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4416 states and 6765 transitions. [2022-11-22 00:31:19,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 00:31:19,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:19,836 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] [2022-11-22 00:31:19,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 00:31:19,837 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:19,837 INFO L85 PathProgramCache]: Analyzing trace with hash -20376734, now seen corresponding path program 1 times [2022-11-22 00:31:19,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:19,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246677851] [2022-11-22 00:31:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:19,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:20,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:20,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246677851] [2022-11-22 00:31:20,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246677851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:20,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:20,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:31:20,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838233402] [2022-11-22 00:31:20,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:20,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:31:20,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:20,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:31:20,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:31:20,179 INFO L87 Difference]: Start difference. First operand 4416 states and 6765 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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) [2022-11-22 00:31:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:21,046 INFO L93 Difference]: Finished difference Result 5613 states and 8557 transitions. [2022-11-22 00:31:21,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 00:31:21,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 [2022-11-22 00:31:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:21,083 INFO L225 Difference]: With dead ends: 5613 [2022-11-22 00:31:21,083 INFO L226 Difference]: Without dead ends: 5611 [2022-11-22 00:31:21,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:31:21,086 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 259 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:21,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 816 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2022-11-22 00:31:21,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 4430. [2022-11-22 00:31:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 4429 states have (on average 1.5281101828855272) internal successors, (6768), 4429 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 6768 transitions. [2022-11-22 00:31:21,671 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 6768 transitions. Word has length 64 [2022-11-22 00:31:21,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:21,672 INFO L495 AbstractCegarLoop]: Abstraction has 4430 states and 6768 transitions. [2022-11-22 00:31:21,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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) [2022-11-22 00:31:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 6768 transitions. [2022-11-22 00:31:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 00:31:21,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:21,673 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:31:21,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 00:31:21,673 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:21,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:21,674 INFO L85 PathProgramCache]: Analyzing trace with hash 329424148, now seen corresponding path program 1 times [2022-11-22 00:31:21,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:21,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920604344] [2022-11-22 00:31:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:21,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:31:23,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:23,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920604344] [2022-11-22 00:31:23,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920604344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:31:23,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276002603] [2022-11-22 00:31:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:23,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:23,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:23,078 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:31:23,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:31:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:23,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 00:31:23,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:31:24,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:31:24,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:31:24,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276002603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:24,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:31:24,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-11-22 00:31:24,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199929990] [2022-11-22 00:31:24,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:24,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:24,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:24,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:31:24,082 INFO L87 Difference]: Start difference. First operand 4430 states and 6768 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:26,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:26,186 INFO L93 Difference]: Finished difference Result 12815 states and 19588 transitions. [2022-11-22 00:31:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:26,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-22 00:31:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:26,209 INFO L225 Difference]: With dead ends: 12815 [2022-11-22 00:31:26,209 INFO L226 Difference]: Without dead ends: 8448 [2022-11-22 00:31:26,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:31:26,216 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 322 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:26,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 334 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:26,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8448 states. [2022-11-22 00:31:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8448 to 8446. [2022-11-22 00:31:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8446 states, 8445 states have (on average 1.5188869153345175) internal successors, (12827), 8445 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:27,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8446 states to 8446 states and 12827 transitions. [2022-11-22 00:31:27,733 INFO L78 Accepts]: Start accepts. Automaton has 8446 states and 12827 transitions. Word has length 74 [2022-11-22 00:31:27,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:27,734 INFO L495 AbstractCegarLoop]: Abstraction has 8446 states and 12827 transitions. [2022-11-22 00:31:27,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:27,734 INFO L276 IsEmpty]: Start isEmpty. Operand 8446 states and 12827 transitions. [2022-11-22 00:31:27,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-22 00:31:27,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:27,735 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:31:27,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:31:27,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:31:27,942 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:27,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:27,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1783789587, now seen corresponding path program 1 times [2022-11-22 00:31:27,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:27,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341005027] [2022-11-22 00:31:27,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:27,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:31:28,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:28,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341005027] [2022-11-22 00:31:28,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341005027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:28,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:28,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:28,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457895471] [2022-11-22 00:31:28,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:28,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:28,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:28,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:28,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:28,023 INFO L87 Difference]: Start difference. First operand 8446 states and 12827 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:29,748 INFO L93 Difference]: Finished difference Result 19834 states and 30241 transitions. [2022-11-22 00:31:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:29,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 75 [2022-11-22 00:31:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:29,775 INFO L225 Difference]: With dead ends: 19834 [2022-11-22 00:31:29,775 INFO L226 Difference]: Without dead ends: 11446 [2022-11-22 00:31:29,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:29,785 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 91 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:29,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 257 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11446 states. [2022-11-22 00:31:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11446 to 11444. [2022-11-22 00:31:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11444 states, 11443 states have (on average 1.5093069999126103) internal successors, (17271), 11443 states have internal predecessors, (17271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11444 states to 11444 states and 17271 transitions. [2022-11-22 00:31:31,197 INFO L78 Accepts]: Start accepts. Automaton has 11444 states and 17271 transitions. Word has length 75 [2022-11-22 00:31:31,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:31,197 INFO L495 AbstractCegarLoop]: Abstraction has 11444 states and 17271 transitions. [2022-11-22 00:31:31,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:31,198 INFO L276 IsEmpty]: Start isEmpty. Operand 11444 states and 17271 transitions. [2022-11-22 00:31:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-22 00:31:31,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:31,199 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:31:31,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 00:31:31,200 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:31,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:31,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1046963442, now seen corresponding path program 1 times [2022-11-22 00:31:31,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:31,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168486565] [2022-11-22 00:31:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:31,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:31:31,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:31,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168486565] [2022-11-22 00:31:31,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168486565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:31,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:31,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:31,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345588024] [2022-11-22 00:31:31,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:31,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:31,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:31,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:31,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:31,368 INFO L87 Difference]: Start difference. First operand 11444 states and 17271 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:33,559 INFO L93 Difference]: Finished difference Result 22832 states and 34475 transitions. [2022-11-22 00:31:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:33,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 [2022-11-22 00:31:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:33,587 INFO L225 Difference]: With dead ends: 22832 [2022-11-22 00:31:33,587 INFO L226 Difference]: Without dead ends: 11444 [2022-11-22 00:31:33,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:31:33,603 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 336 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:33,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 122 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11444 states. [2022-11-22 00:31:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11444 to 11444. [2022-11-22 00:31:35,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11444 states, 11443 states have (on average 1.4907803897579306) internal successors, (17059), 11443 states have internal predecessors, (17059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11444 states to 11444 states and 17059 transitions. [2022-11-22 00:31:35,200 INFO L78 Accepts]: Start accepts. Automaton has 11444 states and 17059 transitions. Word has length 78 [2022-11-22 00:31:35,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:35,200 INFO L495 AbstractCegarLoop]: Abstraction has 11444 states and 17059 transitions. [2022-11-22 00:31:35,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:35,200 INFO L276 IsEmpty]: Start isEmpty. Operand 11444 states and 17059 transitions. [2022-11-22 00:31:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-22 00:31:35,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:35,202 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:31:35,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 00:31:35,202 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:35,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:35,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1672225687, now seen corresponding path program 1 times [2022-11-22 00:31:35,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:35,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885208940] [2022-11-22 00:31:35,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:35,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:31:36,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:36,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885208940] [2022-11-22 00:31:36,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885208940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:31:36,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444966171] [2022-11-22 00:31:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:36,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:36,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:36,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:31:36,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:31:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:36,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 00:31:36,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:31:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:31:36,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:31:36,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444966171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:36,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:31:36,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-11-22 00:31:36,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168078765] [2022-11-22 00:31:36,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:36,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:36,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:36,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:36,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:31:36,996 INFO L87 Difference]: Start difference. First operand 11444 states and 17059 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:41,054 INFO L93 Difference]: Finished difference Result 33419 states and 49757 transitions. [2022-11-22 00:31:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:41,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-22 00:31:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:41,102 INFO L225 Difference]: With dead ends: 33419 [2022-11-22 00:31:41,103 INFO L226 Difference]: Without dead ends: 22022 [2022-11-22 00:31:41,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:31:41,120 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 324 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:41,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 328 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22022 states. [2022-11-22 00:31:44,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22022 to 22020. [2022-11-22 00:31:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22020 states, 22019 states have (on average 1.4799491348380944) internal successors, (32587), 22019 states have internal predecessors, (32587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22020 states to 22020 states and 32587 transitions. [2022-11-22 00:31:44,406 INFO L78 Accepts]: Start accepts. Automaton has 22020 states and 32587 transitions. Word has length 78 [2022-11-22 00:31:44,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:44,406 INFO L495 AbstractCegarLoop]: Abstraction has 22020 states and 32587 transitions. [2022-11-22 00:31:44,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 22020 states and 32587 transitions. [2022-11-22 00:31:44,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-22 00:31:44,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:44,408 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:31:44,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:31:44,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 00:31:44,614 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:44,615 INFO L85 PathProgramCache]: Analyzing trace with hash -139066846, now seen corresponding path program 1 times [2022-11-22 00:31:44,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:44,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311190074] [2022-11-22 00:31:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:44,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:31:44,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:44,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311190074] [2022-11-22 00:31:44,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311190074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:44,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:44,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:44,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952895842] [2022-11-22 00:31:44,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:44,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:44,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:44,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:44,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:44,685 INFO L87 Difference]: Start difference. First operand 22020 states and 32587 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:49,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:49,818 INFO L93 Difference]: Finished difference Result 50328 states and 74421 transitions. [2022-11-22 00:31:49,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:49,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 79 [2022-11-22 00:31:49,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:49,869 INFO L225 Difference]: With dead ends: 50328 [2022-11-22 00:31:49,870 INFO L226 Difference]: Without dead ends: 28350 [2022-11-22 00:31:49,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:49,890 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 89 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:49,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 248 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:31:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28350 states. [2022-11-22 00:31:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28350 to 28348. [2022-11-22 00:31:54,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28348 states, 28347 states have (on average 1.460789501534554) internal successors, (41409), 28347 states have internal predecessors, (41409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28348 states to 28348 states and 41409 transitions. [2022-11-22 00:31:54,294 INFO L78 Accepts]: Start accepts. Automaton has 28348 states and 41409 transitions. Word has length 79 [2022-11-22 00:31:54,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:54,295 INFO L495 AbstractCegarLoop]: Abstraction has 28348 states and 41409 transitions. [2022-11-22 00:31:54,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:31:54,295 INFO L276 IsEmpty]: Start isEmpty. Operand 28348 states and 41409 transitions. [2022-11-22 00:31:54,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-22 00:31:54,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:54,297 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:31:54,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-22 00:31:54,298 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:54,298 INFO L85 PathProgramCache]: Analyzing trace with hash -216121986, now seen corresponding path program 1 times [2022-11-22 00:31:54,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:54,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613462771] [2022-11-22 00:31:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:54,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:31:55,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:55,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613462771] [2022-11-22 00:31:55,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613462771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:31:55,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843868800] [2022-11-22 00:31:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:55,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:55,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:55,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:31:55,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:31:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:55,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 00:31:55,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:31:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:31:56,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:31:56,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843868800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:56,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:31:56,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2022-11-22 00:31:56,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664047510] [2022-11-22 00:31:56,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:56,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:56,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:56,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:56,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:31:56,155 INFO L87 Difference]: Start difference. First operand 28348 states and 41409 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:32:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:07,507 INFO L93 Difference]: Finished difference Result 82776 states and 120683 transitions. [2022-11-22 00:32:07,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:32:07,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 82 [2022-11-22 00:32:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:07,639 INFO L225 Difference]: With dead ends: 82776 [2022-11-22 00:32:07,639 INFO L226 Difference]: Without dead ends: 54522 [2022-11-22 00:32:07,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:32:07,663 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 301 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:07,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 326 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:32:07,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54522 states. [2022-11-22 00:32:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54522 to 54520. [2022-11-22 00:32:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54520 states, 54519 states have (on average 1.448394137823511) internal successors, (78965), 54519 states have internal predecessors, (78965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:32:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54520 states to 54520 states and 78965 transitions. [2022-11-22 00:32:19,738 INFO L78 Accepts]: Start accepts. Automaton has 54520 states and 78965 transitions. Word has length 82 [2022-11-22 00:32:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:19,738 INFO L495 AbstractCegarLoop]: Abstraction has 54520 states and 78965 transitions. [2022-11-22 00:32:19,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:32:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 54520 states and 78965 transitions. [2022-11-22 00:32:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-22 00:32:19,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:19,741 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:32:19,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:32:19,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7d19b12-fa73-4f1c-947c-38a111c27adc/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:19,941 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:19,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:19,942 INFO L85 PathProgramCache]: Analyzing trace with hash 895804263, now seen corresponding path program 1 times [2022-11-22 00:32:19,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:19,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328454301] [2022-11-22 00:32:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:19,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:32:20,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:20,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328454301] [2022-11-22 00:32:20,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328454301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:20,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:32:20,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:32:20,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595414072] [2022-11-22 00:32:20,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:20,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:32:20,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:20,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:32:20,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:32:20,047 INFO L87 Difference]: Start difference. First operand 54520 states and 78965 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)