./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI --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 bbbfe45c1ffa647ad91a5ae3f1a7c62de0a461f2a2e6ecaa8ebabd9df308d4ae --- 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-5e519f3 [2022-11-03 02:27:17,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:27:17,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:27:17,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:27:17,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:27:17,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:27:17,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:27:17,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:27:17,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:27:17,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:27:17,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:27:17,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:27:17,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:27:17,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:27:17,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:27:17,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:27:17,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:27:17,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:27:17,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:27:17,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:27:17,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:27:17,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:27:17,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:27:17,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:27:17,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:27:17,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:27:17,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:27:17,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:27:17,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:27:17,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:27:17,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:27:17,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:27:17,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:27:17,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:27:17,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:27:17,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:27:17,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:27:17,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:27:17,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:27:17,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:27:17,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:27:17,613 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:27:17,659 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:27:17,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:27:17,661 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:27:17,661 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:27:17,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:27:17,662 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:27:17,662 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:27:17,663 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:27:17,663 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:27:17,663 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:27:17,664 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:27:17,665 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:27:17,665 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:27:17,665 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:27:17,665 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:27:17,666 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:27:17,666 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:27:17,666 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:27:17,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:27:17,667 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:27:17,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:27:17,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:27:17,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:27:17,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:27:17,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:27:17,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:27:17,669 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:27:17,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:27:17,669 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:27:17,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:27:17,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:27:17,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:27:17,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:17,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:27:17,672 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:27:17,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:27:17,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:27:17,672 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:27:17,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:27:17,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:27:17,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:27:17,673 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_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbbfe45c1ffa647ad91a5ae3f1a7c62de0a461f2a2e6ecaa8ebabd9df308d4ae [2022-11-03 02:27:18,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:27:18,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:27:18,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:27:18,120 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:27:18,121 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:27:18,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c [2022-11-03 02:27:18,202 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/data/f71e73962/3c237ece808544c6b66c9a0c018fe620/FLAGcd0858e96 [2022-11-03 02:27:18,883 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:27:18,890 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c [2022-11-03 02:27:18,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/data/f71e73962/3c237ece808544c6b66c9a0c018fe620/FLAGcd0858e96 [2022-11-03 02:27:19,107 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/data/f71e73962/3c237ece808544c6b66c9a0c018fe620 [2022-11-03 02:27:19,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:27:19,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:27:19,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:19,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:27:19,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:27:19,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:19" (1/1) ... [2022-11-03 02:27:19,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d6f890b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19, skipping insertion in model container [2022-11-03 02:27:19,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:19" (1/1) ... [2022-11-03 02:27:19,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:27:19,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:27:19,813 WARN L230 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_accdd8a4-8972-4785-805c-3c950ca8bfc6/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c[61125,61138] [2022-11-03 02:27:19,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:19,838 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:27:20,042 WARN L230 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_accdd8a4-8972-4785-805c-3c950ca8bfc6/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c[61125,61138] [2022-11-03 02:27:20,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:20,065 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:27:20,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:20 WrapperNode [2022-11-03 02:27:20,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:20,067 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:20,067 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:27:20,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:27:20,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:20" (1/1) ... [2022-11-03 02:27:20,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:20" (1/1) ... [2022-11-03 02:27:20,242 INFO L138 Inliner]: procedures = 25, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 2053 [2022-11-03 02:27:20,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:20,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:27:20,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:27:20,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:27:20,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:20" (1/1) ... [2022-11-03 02:27:20,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:20" (1/1) ... [2022-11-03 02:27:20,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:20" (1/1) ... [2022-11-03 02:27:20,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:20" (1/1) ... [2022-11-03 02:27:20,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:20" (1/1) ... [2022-11-03 02:27:20,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:20" (1/1) ... [2022-11-03 02:27:20,404 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:20" (1/1) ... [2022-11-03 02:27:20,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:20" (1/1) ... [2022-11-03 02:27:20,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:27:20,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:27:20,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:27:20,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:27:20,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:20" (1/1) ... [2022-11-03 02:27:20,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:20,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:20,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:27:20,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:27:20,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:27:20,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:27:20,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:27:20,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:27:20,734 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:27:20,737 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:27:23,094 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:27:25,391 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:27:25,391 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:27:25,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:25 BoogieIcfgContainer [2022-11-03 02:27:25,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:27:25,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:27:25,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:27:25,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:27:25,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:27:19" (1/3) ... [2022-11-03 02:27:25,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e05a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:25, skipping insertion in model container [2022-11-03 02:27:25,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:20" (2/3) ... [2022-11-03 02:27:25,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e05a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:25, skipping insertion in model container [2022-11-03 02:27:25,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:25" (3/3) ... [2022-11-03 02:27:25,408 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c [2022-11-03 02:27:25,430 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:27:25,430 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:27:25,520 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:27:25,539 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;@2a3bfaa3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:27:25,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:27:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:27:25,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:25,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:25,582 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:25,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:25,592 INFO L85 PathProgramCache]: Analyzing trace with hash -862910580, now seen corresponding path program 1 times [2022-11-03 02:27:25,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:25,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931060980] [2022-11-03 02:27:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:25,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:35,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:35,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931060980] [2022-11-03 02:27:35,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931060980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:35,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:35,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:35,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097418518] [2022-11-03 02:27:35,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:35,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:35,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:35,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:35,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:35,180 INFO L87 Difference]: Start difference. First operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 0 states have call successors, (0), 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 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:35,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:35,622 INFO L93 Difference]: Finished difference Result 480 states and 822 transitions. [2022-11-03 02:27:35,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:35,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2022-11-03 02:27:35,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:35,638 INFO L225 Difference]: With dead ends: 480 [2022-11-03 02:27:35,639 INFO L226 Difference]: Without dead ends: 460 [2022-11-03 02:27:35,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:35,645 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 28 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:35,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1356 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:27:35,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-03 02:27:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 450. [2022-11-03 02:27:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.712694877505568) internal successors, (769), 449 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 769 transitions. [2022-11-03 02:27:35,710 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 769 transitions. Word has length 126 [2022-11-03 02:27:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:35,711 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 769 transitions. [2022-11-03 02:27:35,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:35,712 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 769 transitions. [2022-11-03 02:27:35,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 02:27:35,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:35,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:35,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:27:35,719 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:35,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:35,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1054109118, now seen corresponding path program 1 times [2022-11-03 02:27:35,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:35,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312394668] [2022-11-03 02:27:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:35,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:41,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:41,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312394668] [2022-11-03 02:27:41,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312394668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:41,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:41,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:41,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308771396] [2022-11-03 02:27:41,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:41,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:41,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:41,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:41,316 INFO L87 Difference]: Start difference. First operand 450 states and 769 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:41,716 INFO L93 Difference]: Finished difference Result 483 states and 819 transitions. [2022-11-03 02:27:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:41,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2022-11-03 02:27:41,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:41,720 INFO L225 Difference]: With dead ends: 483 [2022-11-03 02:27:41,720 INFO L226 Difference]: Without dead ends: 462 [2022-11-03 02:27:41,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:41,722 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 26 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:41,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:27:41,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-03 02:27:41,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-03 02:27:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.710467706013363) internal successors, (768), 449 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 768 transitions. [2022-11-03 02:27:41,744 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 768 transitions. Word has length 127 [2022-11-03 02:27:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:41,745 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 768 transitions. [2022-11-03 02:27:41,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 768 transitions. [2022-11-03 02:27:41,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 02:27:41,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:41,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:41,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:27:41,748 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:41,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:41,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1614122549, now seen corresponding path program 1 times [2022-11-03 02:27:41,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:41,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528279378] [2022-11-03 02:27:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:41,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:46,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:46,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528279378] [2022-11-03 02:27:46,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528279378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:46,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:46,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:46,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488090884] [2022-11-03 02:27:46,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:46,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:46,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:46,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:46,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:46,162 INFO L87 Difference]: Start difference. First operand 450 states and 768 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:46,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:46,530 INFO L93 Difference]: Finished difference Result 483 states and 818 transitions. [2022-11-03 02:27:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:46,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2022-11-03 02:27:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:46,535 INFO L225 Difference]: With dead ends: 483 [2022-11-03 02:27:46,538 INFO L226 Difference]: Without dead ends: 462 [2022-11-03 02:27:46,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:46,542 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 24 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:46,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:27:46,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-03 02:27:46,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-03 02:27:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7082405345211582) internal successors, (767), 449 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 767 transitions. [2022-11-03 02:27:46,581 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 767 transitions. Word has length 128 [2022-11-03 02:27:46,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:46,582 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 767 transitions. [2022-11-03 02:27:46,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:46,584 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 767 transitions. [2022-11-03 02:27:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 02:27:46,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:46,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:46,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:27:46,588 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:46,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:46,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1564589941, now seen corresponding path program 1 times [2022-11-03 02:27:46,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:46,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661657668] [2022-11-03 02:27:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:50,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:50,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661657668] [2022-11-03 02:27:50,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661657668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:50,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:50,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:50,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889813236] [2022-11-03 02:27:50,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:50,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:50,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:50,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:50,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:50,966 INFO L87 Difference]: Start difference. First operand 450 states and 767 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:51,324 INFO L93 Difference]: Finished difference Result 483 states and 817 transitions. [2022-11-03 02:27:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2022-11-03 02:27:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:51,328 INFO L225 Difference]: With dead ends: 483 [2022-11-03 02:27:51,328 INFO L226 Difference]: Without dead ends: 462 [2022-11-03 02:27:51,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:51,329 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 22 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:51,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:27:51,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-03 02:27:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-03 02:27:51,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7060133630289531) internal successors, (766), 449 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 766 transitions. [2022-11-03 02:27:51,352 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 766 transitions. Word has length 129 [2022-11-03 02:27:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:51,352 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 766 transitions. [2022-11-03 02:27:51,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 766 transitions. [2022-11-03 02:27:51,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:27:51,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:51,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:51,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:27:51,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:51,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1314977570, now seen corresponding path program 1 times [2022-11-03 02:27:51,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:51,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061947696] [2022-11-03 02:27:51,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:51,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:54,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:54,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061947696] [2022-11-03 02:27:54,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061947696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:54,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:54,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:54,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145089356] [2022-11-03 02:27:54,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:54,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:54,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:54,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:54,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:54,905 INFO L87 Difference]: Start difference. First operand 450 states and 766 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:55,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:55,190 INFO L93 Difference]: Finished difference Result 483 states and 816 transitions. [2022-11-03 02:27:55,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:55,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2022-11-03 02:27:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:55,193 INFO L225 Difference]: With dead ends: 483 [2022-11-03 02:27:55,193 INFO L226 Difference]: Without dead ends: 462 [2022-11-03 02:27:55,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:55,195 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 20 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:55,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1372 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:27:55,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-03 02:27:55,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-03 02:27:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7037861915367483) internal successors, (765), 449 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:55,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 765 transitions. [2022-11-03 02:27:55,209 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 765 transitions. Word has length 130 [2022-11-03 02:27:55,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:55,211 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 765 transitions. [2022-11-03 02:27:55,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 765 transitions. [2022-11-03 02:27:55,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:27:55,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:55,219 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:55,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:27:55,220 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:55,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:55,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2133490388, now seen corresponding path program 1 times [2022-11-03 02:27:55,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:55,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827417383] [2022-11-03 02:27:55,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:55,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:58,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:58,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827417383] [2022-11-03 02:27:58,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827417383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:58,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:58,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:58,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112247569] [2022-11-03 02:27:58,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:58,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:58,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:58,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:58,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:58,475 INFO L87 Difference]: Start difference. First operand 450 states and 765 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:58,784 INFO L93 Difference]: Finished difference Result 483 states and 815 transitions. [2022-11-03 02:27:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:58,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2022-11-03 02:27:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:58,787 INFO L225 Difference]: With dead ends: 483 [2022-11-03 02:27:58,787 INFO L226 Difference]: Without dead ends: 462 [2022-11-03 02:27:58,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:58,789 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 18 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:58,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 1371 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:27:58,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-03 02:27:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-11-03 02:27:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7015590200445434) internal successors, (764), 449 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 764 transitions. [2022-11-03 02:27:58,803 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 764 transitions. Word has length 131 [2022-11-03 02:27:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:58,803 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 764 transitions. [2022-11-03 02:27:58,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:27:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 764 transitions. [2022-11-03 02:27:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 02:27:58,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:58,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:58,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:27:58,806 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:58,807 INFO L85 PathProgramCache]: Analyzing trace with hash 106614076, now seen corresponding path program 1 times [2022-11-03 02:27:58,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:58,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60899587] [2022-11-03 02:27:58,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:58,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:02,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:02,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60899587] [2022-11-03 02:28:02,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60899587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:02,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:02,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:28:02,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112392957] [2022-11-03 02:28:02,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:02,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:28:02,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:28:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:28:02,532 INFO L87 Difference]: Start difference. First operand 450 states and 764 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:02,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:02,895 INFO L93 Difference]: Finished difference Result 481 states and 811 transitions. [2022-11-03 02:28:02,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:28:02,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2022-11-03 02:28:02,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:02,898 INFO L225 Difference]: With dead ends: 481 [2022-11-03 02:28:02,898 INFO L226 Difference]: Without dead ends: 460 [2022-11-03 02:28:02,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:28:02,899 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 15 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:02,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1362 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:28:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-03 02:28:02,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 451. [2022-11-03 02:28:02,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.7) internal successors, (765), 450 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 765 transitions. [2022-11-03 02:28:02,914 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 765 transitions. Word has length 133 [2022-11-03 02:28:02,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:02,914 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 765 transitions. [2022-11-03 02:28:02,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 765 transitions. [2022-11-03 02:28:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 02:28:02,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:02,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:02,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:28:02,917 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:02,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:02,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1078004907, now seen corresponding path program 1 times [2022-11-03 02:28:02,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:02,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819510628] [2022-11-03 02:28:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:02,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:07,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:07,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819510628] [2022-11-03 02:28:07,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819510628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:07,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:07,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:28:07,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84079578] [2022-11-03 02:28:07,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:07,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:28:07,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:07,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:28:07,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:28:07,226 INFO L87 Difference]: Start difference. First operand 451 states and 765 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:07,557 INFO L93 Difference]: Finished difference Result 482 states and 812 transitions. [2022-11-03 02:28:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:28:07,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-11-03 02:28:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:07,560 INFO L225 Difference]: With dead ends: 482 [2022-11-03 02:28:07,560 INFO L226 Difference]: Without dead ends: 461 [2022-11-03 02:28:07,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:28:07,561 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 12 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:07,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2046 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:28:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-03 02:28:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 453. [2022-11-03 02:28:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.6946902654867257) internal successors, (766), 452 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 766 transitions. [2022-11-03 02:28:07,576 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 766 transitions. Word has length 134 [2022-11-03 02:28:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:07,576 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 766 transitions. [2022-11-03 02:28:07,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 766 transitions. [2022-11-03 02:28:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-03 02:28:07,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:07,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:07,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:28:07,580 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:07,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:07,580 INFO L85 PathProgramCache]: Analyzing trace with hash 633489339, now seen corresponding path program 1 times [2022-11-03 02:28:07,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:07,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970736131] [2022-11-03 02:28:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:07,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:11,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:11,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970736131] [2022-11-03 02:28:11,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970736131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:11,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:11,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:28:11,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920732824] [2022-11-03 02:28:11,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:11,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:28:11,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:11,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:28:11,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:28:11,972 INFO L87 Difference]: Start difference. First operand 453 states and 766 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:12,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:12,306 INFO L93 Difference]: Finished difference Result 482 states and 809 transitions. [2022-11-03 02:28:12,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:28:12,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2022-11-03 02:28:12,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:12,309 INFO L225 Difference]: With dead ends: 482 [2022-11-03 02:28:12,309 INFO L226 Difference]: Without dead ends: 461 [2022-11-03 02:28:12,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:28:12,310 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 7 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:12,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1365 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:28:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-03 02:28:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 454. [2022-11-03 02:28:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6931567328918322) internal successors, (767), 453 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 767 transitions. [2022-11-03 02:28:12,326 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 767 transitions. Word has length 136 [2022-11-03 02:28:12,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:12,327 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 767 transitions. [2022-11-03 02:28:12,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:12,327 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 767 transitions. [2022-11-03 02:28:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:28:12,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:12,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:12,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:28:12,330 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:12,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1847552457, now seen corresponding path program 1 times [2022-11-03 02:28:12,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:12,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476403780] [2022-11-03 02:28:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:12,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:12,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:12,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476403780] [2022-11-03 02:28:12,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476403780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:12,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:12,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:28:12,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591992446] [2022-11-03 02:28:12,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:12,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:28:12,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:12,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:28:12,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:28:12,903 INFO L87 Difference]: Start difference. First operand 454 states and 767 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:13,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:13,394 INFO L93 Difference]: Finished difference Result 505 states and 847 transitions. [2022-11-03 02:28:13,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:28:13,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2022-11-03 02:28:13,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:13,397 INFO L225 Difference]: With dead ends: 505 [2022-11-03 02:28:13,397 INFO L226 Difference]: Without dead ends: 484 [2022-11-03 02:28:13,398 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 [2022-11-03 02:28:13,398 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 46 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2754 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:13,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 2754 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:28:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-03 02:28:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 457. [2022-11-03 02:28:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.6864035087719298) internal successors, (769), 456 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 769 transitions. [2022-11-03 02:28:13,414 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 769 transitions. Word has length 137 [2022-11-03 02:28:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:13,414 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 769 transitions. [2022-11-03 02:28:13,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:28:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 769 transitions. [2022-11-03 02:28:13,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:28:13,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:13,417 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:13,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:28:13,417 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:13,418 INFO L85 PathProgramCache]: Analyzing trace with hash -358222161, now seen corresponding path program 1 times [2022-11-03 02:28:13,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:13,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249088843] [2022-11-03 02:28:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:13,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:28:49,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:49,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249088843] [2022-11-03 02:28:49,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249088843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:49,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399154788] [2022-11-03 02:28:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:49,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:49,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:49,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:49,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_accdd8a4-8972-4785-805c-3c950ca8bfc6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:28:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:50,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:28:50,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:14,806 WARN L234 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 538 DAG size of output: 500 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:31:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:31:13,451 INFO L328 TraceCheckSpWp]: Computing backward predicates...