./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label59.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label59.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P --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 2d68e7262b60a12a6597b15e2848fbc8314c4945758acd933fd69212a55e4a41 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:25:30,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:25:30,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:25:30,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:25:30,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:25:30,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:25:30,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:25:30,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:25:30,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:25:30,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:25:30,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:25:30,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:25:30,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:25:30,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:25:30,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:25:30,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:25:30,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:25:30,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:25:30,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:25:30,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:25:30,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:25:30,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:25:30,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:25:30,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:25:30,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:25:30,352 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:25:30,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:25:30,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:25:30,355 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:25:30,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:25:30,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:25:30,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:25:30,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:25:30,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:25:30,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:25:30,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:25:30,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:25:30,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:25:30,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:25:30,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:25:30,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:25:30,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:25:30,392 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:25:30,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:25:30,393 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:25:30,393 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:25:30,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:25:30,394 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:25:30,395 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:25:30,395 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:25:30,395 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:25:30,395 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:25:30,396 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:25:30,396 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:25:30,396 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:25:30,396 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:25:30,397 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:25:30,397 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:25:30,397 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:25:30,397 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:25:30,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:25:30,399 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:25:30,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:25:30,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:25:30,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:25:30,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:25:30,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:25:30,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:25:30,400 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:25:30,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:25:30,401 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:25:30,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:25:30,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:25:30,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:25:30,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:25:30,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:25:30,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:25:30,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:25:30,403 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:25:30,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:25:30,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:25:30,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:25:30,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:25:30,404 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d68e7262b60a12a6597b15e2848fbc8314c4945758acd933fd69212a55e4a41 [2021-11-21 01:25:30,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:25:30,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:25:30,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:25:30,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:25:30,723 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:25:30,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/eca-rers2012/Problem03_label59.c [2021-11-21 01:25:30,818 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/data/44668c952/0ca65c5a5301412ebfaff88b0b97a70c/FLAGcca720619 [2021-11-21 01:25:31,589 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:25:31,589 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/sv-benchmarks/c/eca-rers2012/Problem03_label59.c [2021-11-21 01:25:31,613 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/data/44668c952/0ca65c5a5301412ebfaff88b0b97a70c/FLAGcca720619 [2021-11-21 01:25:31,815 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/data/44668c952/0ca65c5a5301412ebfaff88b0b97a70c [2021-11-21 01:25:31,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:25:31,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:25:31,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:25:31,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:25:31,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:25:31,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:25:31" (1/1) ... [2021-11-21 01:25:31,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68583413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:31, skipping insertion in model container [2021-11-21 01:25:31,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:25:31" (1/1) ... [2021-11-21 01:25:31,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:25:31,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:25:32,511 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_3b3ef86c-0e03-406e-a31c-1f9ff3652377/sv-benchmarks/c/eca-rers2012/Problem03_label59.c[57711,57724] [2021-11-21 01:25:32,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:25:32,554 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:25:32,827 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_3b3ef86c-0e03-406e-a31c-1f9ff3652377/sv-benchmarks/c/eca-rers2012/Problem03_label59.c[57711,57724] [2021-11-21 01:25:32,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:25:32,865 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:25:32,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:32 WrapperNode [2021-11-21 01:25:32,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:25:32,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:25:32,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:25:32,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:25:32,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:32" (1/1) ... [2021-11-21 01:25:32,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:32" (1/1) ... [2021-11-21 01:25:33,039 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-21 01:25:33,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:25:33,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:25:33,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:25:33,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:25:33,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:32" (1/1) ... [2021-11-21 01:25:33,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:32" (1/1) ... [2021-11-21 01:25:33,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:32" (1/1) ... [2021-11-21 01:25:33,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:32" (1/1) ... [2021-11-21 01:25:33,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:32" (1/1) ... [2021-11-21 01:25:33,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:32" (1/1) ... [2021-11-21 01:25:33,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:32" (1/1) ... [2021-11-21 01:25:33,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:25:33,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:25:33,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:25:33,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:25:33,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:32" (1/1) ... [2021-11-21 01:25:33,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:25:33,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:33,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:25:33,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:25:33,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:25:33,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:25:33,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:25:33,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:25:33,344 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:25:33,346 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:25:35,037 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:25:35,327 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:25:35,327 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:25:35,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:25:35 BoogieIcfgContainer [2021-11-21 01:25:35,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:25:35,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:25:35,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:25:35,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:25:35,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:25:31" (1/3) ... [2021-11-21 01:25:35,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c4490db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:25:35, skipping insertion in model container [2021-11-21 01:25:35,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:32" (2/3) ... [2021-11-21 01:25:35,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c4490db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:25:35, skipping insertion in model container [2021-11-21 01:25:35,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:25:35" (3/3) ... [2021-11-21 01:25:35,341 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label59.c [2021-11-21 01:25:35,349 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:25:35,349 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:25:35,409 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:25:35,418 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:25:35,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:25:35,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:35,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-21 01:25:35,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:35,469 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:35,470 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:35,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:35,477 INFO L85 PathProgramCache]: Analyzing trace with hash 209344695, now seen corresponding path program 1 times [2021-11-21 01:25:35,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:35,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181918841] [2021-11-21 01:25:35,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:35,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:36,050 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:36,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181918841] [2021-11-21 01:25:36,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181918841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:36,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:36,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:36,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737953215] [2021-11-21 01:25:36,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:36,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:36,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:36,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:36,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:36,086 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:36,900 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2021-11-21 01:25:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:36,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2021-11-21 01:25:36,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:36,915 INFO L225 Difference]: With dead ends: 440 [2021-11-21 01:25:36,915 INFO L226 Difference]: Without dead ends: 289 [2021-11-21 01:25:36,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:36,937 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:36,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 57 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:25:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-21 01:25:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-21 01:25:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.9270833333333333) internal successors, (555), 288 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 555 transitions. [2021-11-21 01:25:37,067 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 555 transitions. Word has length 143 [2021-11-21 01:25:37,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:37,071 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 555 transitions. [2021-11-21 01:25:37,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 555 transitions. [2021-11-21 01:25:37,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-21 01:25:37,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:37,083 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1] [2021-11-21 01:25:37,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:25:37,084 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash 967422061, now seen corresponding path program 1 times [2021-11-21 01:25:37,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:37,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011070307] [2021-11-21 01:25:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:37,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:37,214 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:37,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011070307] [2021-11-21 01:25:37,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011070307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:37,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:37,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:37,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063634232] [2021-11-21 01:25:37,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:37,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:37,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:37,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:37,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:37,218 INFO L87 Difference]: Start difference. First operand 289 states and 555 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:37,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:37,949 INFO L93 Difference]: Finished difference Result 865 states and 1663 transitions. [2021-11-21 01:25:37,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:37,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2021-11-21 01:25:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:37,956 INFO L225 Difference]: With dead ends: 865 [2021-11-21 01:25:37,956 INFO L226 Difference]: Without dead ends: 577 [2021-11-21 01:25:37,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:37,960 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 176 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:37,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 51 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:25:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-21 01:25:38,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2021-11-21 01:25:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7822299651567943) internal successors, (1023), 574 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1023 transitions. [2021-11-21 01:25:38,018 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1023 transitions. Word has length 147 [2021-11-21 01:25:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:38,019 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1023 transitions. [2021-11-21 01:25:38,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1023 transitions. [2021-11-21 01:25:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:25:38,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:38,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:38,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:25:38,034 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:38,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:38,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1322620577, now seen corresponding path program 1 times [2021-11-21 01:25:38,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:38,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309425686] [2021-11-21 01:25:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:38,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:38,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:38,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309425686] [2021-11-21 01:25:38,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309425686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:38,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:38,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:38,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722129132] [2021-11-21 01:25:38,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:38,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:38,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:38,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:38,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:38,164 INFO L87 Difference]: Start difference. First operand 575 states and 1023 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:38,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:38,849 INFO L93 Difference]: Finished difference Result 1723 states and 3067 transitions. [2021-11-21 01:25:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:38,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2021-11-21 01:25:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:38,856 INFO L225 Difference]: With dead ends: 1723 [2021-11-21 01:25:38,857 INFO L226 Difference]: Without dead ends: 1149 [2021-11-21 01:25:38,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:38,859 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 166 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:38,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 74 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:25:38,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-11-21 01:25:38,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2021-11-21 01:25:38,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.649214659685864) internal successors, (1890), 1146 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1890 transitions. [2021-11-21 01:25:38,902 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1890 transitions. Word has length 148 [2021-11-21 01:25:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:38,902 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1890 transitions. [2021-11-21 01:25:38,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1890 transitions. [2021-11-21 01:25:38,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-21 01:25:38,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:38,906 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:38,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:25:38,907 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:38,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1094384982, now seen corresponding path program 1 times [2021-11-21 01:25:38,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:38,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877157883] [2021-11-21 01:25:38,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:38,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:38,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:38,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877157883] [2021-11-21 01:25:38,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877157883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:38,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:38,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:38,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022220061] [2021-11-21 01:25:38,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:38,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:38,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:38,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:38,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:38,962 INFO L87 Difference]: Start difference. First operand 1147 states and 1890 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:39,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:39,662 INFO L93 Difference]: Finished difference Result 3437 states and 5667 transitions. [2021-11-21 01:25:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:39,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 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 151 [2021-11-21 01:25:39,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:39,677 INFO L225 Difference]: With dead ends: 3437 [2021-11-21 01:25:39,677 INFO L226 Difference]: Without dead ends: 2291 [2021-11-21 01:25:39,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:39,680 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:39,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:25:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-11-21 01:25:39,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2021-11-21 01:25:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.6096069868995633) internal successors, (3686), 2290 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3686 transitions. [2021-11-21 01:25:39,782 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3686 transitions. Word has length 151 [2021-11-21 01:25:39,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:39,782 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 3686 transitions. [2021-11-21 01:25:39,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:39,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3686 transitions. [2021-11-21 01:25:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-21 01:25:39,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:39,790 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:39,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:25:39,791 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:39,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:39,792 INFO L85 PathProgramCache]: Analyzing trace with hash 14512849, now seen corresponding path program 1 times [2021-11-21 01:25:39,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:39,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125026809] [2021-11-21 01:25:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:39,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:39,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:39,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125026809] [2021-11-21 01:25:39,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125026809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:39,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:39,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:39,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709093300] [2021-11-21 01:25:39,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:39,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:39,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:39,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:39,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:39,860 INFO L87 Difference]: Start difference. First operand 2291 states and 3686 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:40,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:40,618 INFO L93 Difference]: Finished difference Result 5725 states and 9167 transitions. [2021-11-21 01:25:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:40,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-11-21 01:25:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:40,638 INFO L225 Difference]: With dead ends: 5725 [2021-11-21 01:25:40,639 INFO L226 Difference]: Without dead ends: 3435 [2021-11-21 01:25:40,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:40,650 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 157 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:40,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 34 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:25:40,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2021-11-21 01:25:40,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2021-11-21 01:25:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.5690157251019219) internal successors, (5388), 3434 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 5388 transitions. [2021-11-21 01:25:40,762 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 5388 transitions. Word has length 153 [2021-11-21 01:25:40,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:40,763 INFO L470 AbstractCegarLoop]: Abstraction has 3435 states and 5388 transitions. [2021-11-21 01:25:40,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:40,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 5388 transitions. [2021-11-21 01:25:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-21 01:25:40,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:40,778 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1] [2021-11-21 01:25:40,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:25:40,778 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:40,779 INFO L85 PathProgramCache]: Analyzing trace with hash -316853541, now seen corresponding path program 1 times [2021-11-21 01:25:40,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:40,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867284185] [2021-11-21 01:25:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:40,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:40,941 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:40,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867284185] [2021-11-21 01:25:40,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867284185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:40,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339073737] [2021-11-21 01:25:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:40,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:40,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:40,944 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:40,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:25:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:41,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:25:41,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:25:41,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:25:41,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339073737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:41,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:25:41,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-21 01:25:41,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368270047] [2021-11-21 01:25:41,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:41,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:41,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:41,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:41,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:41,531 INFO L87 Difference]: Start difference. First operand 3435 states and 5388 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:42,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:42,291 INFO L93 Difference]: Finished difference Result 10301 states and 16161 transitions. [2021-11-21 01:25:42,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:42,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 158 [2021-11-21 01:25:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:42,331 INFO L225 Difference]: With dead ends: 10301 [2021-11-21 01:25:42,332 INFO L226 Difference]: Without dead ends: 6867 [2021-11-21 01:25:42,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:42,338 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 14 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:42,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 259 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:25:42,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2021-11-21 01:25:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 5580. [2021-11-21 01:25:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5580 states, 5579 states have (on average 1.4104678257752286) internal successors, (7869), 5579 states have internal predecessors, (7869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5580 states to 5580 states and 7869 transitions. [2021-11-21 01:25:42,516 INFO L78 Accepts]: Start accepts. Automaton has 5580 states and 7869 transitions. Word has length 158 [2021-11-21 01:25:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:42,517 INFO L470 AbstractCegarLoop]: Abstraction has 5580 states and 7869 transitions. [2021-11-21 01:25:42,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 5580 states and 7869 transitions. [2021-11-21 01:25:42,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-21 01:25:42,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:42,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:42,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:42,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:25:42,752 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1854709246, now seen corresponding path program 1 times [2021-11-21 01:25:42,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:42,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162405177] [2021-11-21 01:25:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:42,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:42,807 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:42,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162405177] [2021-11-21 01:25:42,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162405177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:42,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:42,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:42,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539102538] [2021-11-21 01:25:42,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:42,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:42,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:42,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:42,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:42,810 INFO L87 Difference]: Start difference. First operand 5580 states and 7869 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:43,616 INFO L93 Difference]: Finished difference Result 14591 states and 21123 transitions. [2021-11-21 01:25:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:43,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 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 162 [2021-11-21 01:25:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:43,662 INFO L225 Difference]: With dead ends: 14591 [2021-11-21 01:25:43,662 INFO L226 Difference]: Without dead ends: 9012 [2021-11-21 01:25:43,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:43,670 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 138 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:43,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 108 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:25:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2021-11-21 01:25:43,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 9012. [2021-11-21 01:25:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9012 states, 9011 states have (on average 1.317389856841638) internal successors, (11871), 9011 states have internal predecessors, (11871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9012 states to 9012 states and 11871 transitions. [2021-11-21 01:25:43,924 INFO L78 Accepts]: Start accepts. Automaton has 9012 states and 11871 transitions. Word has length 162 [2021-11-21 01:25:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:43,924 INFO L470 AbstractCegarLoop]: Abstraction has 9012 states and 11871 transitions. [2021-11-21 01:25:43,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand 9012 states and 11871 transitions. [2021-11-21 01:25:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-21 01:25:43,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:43,941 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:43,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:25:43,942 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:43,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:43,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1769901956, now seen corresponding path program 1 times [2021-11-21 01:25:43,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:43,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033298631] [2021-11-21 01:25:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:43,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:25:44,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:44,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033298631] [2021-11-21 01:25:44,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033298631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:44,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935736837] [2021-11-21 01:25:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:44,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:44,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:44,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:44,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:25:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:44,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:25:44,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:25:44,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:25:44,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935736837] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:44,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:25:44,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-21 01:25:44,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993377427] [2021-11-21 01:25:44,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:44,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:44,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:44,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:44,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:44,628 INFO L87 Difference]: Start difference. First operand 9012 states and 11871 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:45,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:45,116 INFO L93 Difference]: Finished difference Result 17880 states and 23537 transitions. [2021-11-21 01:25:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:45,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 199 [2021-11-21 01:25:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:45,160 INFO L225 Difference]: With dead ends: 17880 [2021-11-21 01:25:45,160 INFO L226 Difference]: Without dead ends: 8869 [2021-11-21 01:25:45,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:45,174 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:45,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:25:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8869 states. [2021-11-21 01:25:45,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8869 to 8869. [2021-11-21 01:25:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8869 states, 8868 states have (on average 1.2949932341001353) internal successors, (11484), 8868 states have internal predecessors, (11484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8869 states to 8869 states and 11484 transitions. [2021-11-21 01:25:45,391 INFO L78 Accepts]: Start accepts. Automaton has 8869 states and 11484 transitions. Word has length 199 [2021-11-21 01:25:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:45,392 INFO L470 AbstractCegarLoop]: Abstraction has 8869 states and 11484 transitions. [2021-11-21 01:25:45,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 8869 states and 11484 transitions. [2021-11-21 01:25:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-21 01:25:45,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:45,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:45,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:45,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 01:25:45,624 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1315654686, now seen corresponding path program 1 times [2021-11-21 01:25:45,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:45,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761969834] [2021-11-21 01:25:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:45,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:45,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:45,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761969834] [2021-11-21 01:25:45,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761969834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:45,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:45,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:45,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19464487] [2021-11-21 01:25:45,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:45,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:45,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:45,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:45,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:45,732 INFO L87 Difference]: Start difference. First operand 8869 states and 11484 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:46,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:46,493 INFO L93 Difference]: Finished difference Result 20599 states and 26599 transitions. [2021-11-21 01:25:46,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:46,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 206 [2021-11-21 01:25:46,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:46,514 INFO L225 Difference]: With dead ends: 20599 [2021-11-21 01:25:46,515 INFO L226 Difference]: Without dead ends: 11731 [2021-11-21 01:25:46,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:46,525 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 96 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:46,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 111 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:25:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11731 states. [2021-11-21 01:25:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11731 to 11729. [2021-11-21 01:25:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11729 states, 11728 states have (on average 1.2794167803547067) internal successors, (15005), 11728 states have internal predecessors, (15005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11729 states to 11729 states and 15005 transitions. [2021-11-21 01:25:46,745 INFO L78 Accepts]: Start accepts. Automaton has 11729 states and 15005 transitions. Word has length 206 [2021-11-21 01:25:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:46,745 INFO L470 AbstractCegarLoop]: Abstraction has 11729 states and 15005 transitions. [2021-11-21 01:25:46,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 11729 states and 15005 transitions. [2021-11-21 01:25:46,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-21 01:25:46,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:46,762 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:46,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:25:46,763 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:46,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1345065795, now seen corresponding path program 1 times [2021-11-21 01:25:46,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:46,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402646472] [2021-11-21 01:25:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:46,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:46,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:46,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402646472] [2021-11-21 01:25:46,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402646472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:46,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196553676] [2021-11-21 01:25:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:46,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:46,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:46,878 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:46,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:25:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:47,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:25:47,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:47,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:25:47,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196553676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:47,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:25:47,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-21 01:25:47,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007104672] [2021-11-21 01:25:47,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:47,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:47,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:47,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:47,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:47,833 INFO L87 Difference]: Start difference. First operand 11729 states and 15005 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:48,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:48,439 INFO L93 Difference]: Finished difference Result 26031 states and 32988 transitions. [2021-11-21 01:25:48,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:48,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 213 [2021-11-21 01:25:48,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:48,465 INFO L225 Difference]: With dead ends: 26031 [2021-11-21 01:25:48,466 INFO L226 Difference]: Without dead ends: 14303 [2021-11-21 01:25:48,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:48,480 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 82 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:48,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 105 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:25:48,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14303 states. [2021-11-21 01:25:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14303 to 14160. [2021-11-21 01:25:48,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14160 states, 14159 states have (on average 1.2509358005508864) internal successors, (17712), 14159 states have internal predecessors, (17712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14160 states to 14160 states and 17712 transitions. [2021-11-21 01:25:48,764 INFO L78 Accepts]: Start accepts. Automaton has 14160 states and 17712 transitions. Word has length 213 [2021-11-21 01:25:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:48,764 INFO L470 AbstractCegarLoop]: Abstraction has 14160 states and 17712 transitions. [2021-11-21 01:25:48,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:48,765 INFO L276 IsEmpty]: Start isEmpty. Operand 14160 states and 17712 transitions. [2021-11-21 01:25:48,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-21 01:25:48,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:48,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:48,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:49,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:25:49,000 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:49,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:49,001 INFO L85 PathProgramCache]: Analyzing trace with hash 525262019, now seen corresponding path program 1 times [2021-11-21 01:25:49,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:49,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691950017] [2021-11-21 01:25:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:49,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:49,173 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:49,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691950017] [2021-11-21 01:25:49,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691950017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:49,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:49,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:25:49,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951248340] [2021-11-21 01:25:49,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:49,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:49,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:49,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:49,176 INFO L87 Difference]: Start difference. First operand 14160 states and 17712 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:49,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:49,818 INFO L93 Difference]: Finished difference Result 28750 states and 35921 transitions. [2021-11-21 01:25:49,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:49,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 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 217 [2021-11-21 01:25:49,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:49,850 INFO L225 Difference]: With dead ends: 28750 [2021-11-21 01:25:49,850 INFO L226 Difference]: Without dead ends: 14734 [2021-11-21 01:25:49,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:25:49,866 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 74 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:49,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 104 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:25:49,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14734 states. [2021-11-21 01:25:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14734 to 14732. [2021-11-21 01:25:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14732 states, 14731 states have (on average 1.246487000203652) internal successors, (18362), 14731 states have internal predecessors, (18362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14732 states to 14732 states and 18362 transitions. [2021-11-21 01:25:50,133 INFO L78 Accepts]: Start accepts. Automaton has 14732 states and 18362 transitions. Word has length 217 [2021-11-21 01:25:50,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:50,134 INFO L470 AbstractCegarLoop]: Abstraction has 14732 states and 18362 transitions. [2021-11-21 01:25:50,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand 14732 states and 18362 transitions. [2021-11-21 01:25:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-21 01:25:50,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:50,151 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:50,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:25:50,152 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:50,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:50,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1143616790, now seen corresponding path program 1 times [2021-11-21 01:25:50,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:50,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354258382] [2021-11-21 01:25:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:50,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 86 proven. 6 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 01:25:50,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:50,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354258382] [2021-11-21 01:25:50,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354258382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:50,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876569171] [2021-11-21 01:25:50,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:50,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:50,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:50,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:50,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:25:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:50,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:25:50,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-21 01:25:50,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:25:50,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876569171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:50,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:25:50,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-21 01:25:50,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009943178] [2021-11-21 01:25:50,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:50,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:50,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:50,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:50,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:50,888 INFO L87 Difference]: Start difference. First operand 14732 states and 18362 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:51,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:51,618 INFO L93 Difference]: Finished difference Result 33753 states and 42244 transitions. [2021-11-21 01:25:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:51,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2021-11-21 01:25:51,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:51,646 INFO L225 Difference]: With dead ends: 33753 [2021-11-21 01:25:51,646 INFO L226 Difference]: Without dead ends: 19737 [2021-11-21 01:25:51,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:51,658 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:51,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 200 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:25:51,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19737 states. [2021-11-21 01:25:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19737 to 19165. [2021-11-21 01:25:51,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19165 states, 19164 states have (on average 1.2269881026925484) internal successors, (23514), 19164 states have internal predecessors, (23514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19165 states to 19165 states and 23514 transitions. [2021-11-21 01:25:51,957 INFO L78 Accepts]: Start accepts. Automaton has 19165 states and 23514 transitions. Word has length 231 [2021-11-21 01:25:51,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:51,958 INFO L470 AbstractCegarLoop]: Abstraction has 19165 states and 23514 transitions. [2021-11-21 01:25:51,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 19165 states and 23514 transitions. [2021-11-21 01:25:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-21 01:25:52,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:52,048 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:52,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:52,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:52,267 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1505883134, now seen corresponding path program 1 times [2021-11-21 01:25:52,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:52,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653539768] [2021-11-21 01:25:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:52,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:52,393 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:52,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653539768] [2021-11-21 01:25:52,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653539768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:52,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:52,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:25:52,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192016018] [2021-11-21 01:25:52,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:52,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:25:52,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:52,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:25:52,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:25:52,395 INFO L87 Difference]: Start difference. First operand 19165 states and 23514 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:53,422 INFO L93 Difference]: Finished difference Result 38615 states and 47411 transitions. [2021-11-21 01:25:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:25:53,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 243 [2021-11-21 01:25:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:53,450 INFO L225 Difference]: With dead ends: 38615 [2021-11-21 01:25:53,451 INFO L226 Difference]: Without dead ends: 20166 [2021-11-21 01:25:53,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:25:53,463 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 201 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:53,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 64 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:25:53,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20166 states. [2021-11-21 01:25:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20166 to 20166. [2021-11-21 01:25:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20166 states, 20165 states have (on average 1.2194396231093478) internal successors, (24590), 20165 states have internal predecessors, (24590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20166 states to 20166 states and 24590 transitions. [2021-11-21 01:25:53,821 INFO L78 Accepts]: Start accepts. Automaton has 20166 states and 24590 transitions. Word has length 243 [2021-11-21 01:25:53,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:53,821 INFO L470 AbstractCegarLoop]: Abstraction has 20166 states and 24590 transitions. [2021-11-21 01:25:53,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:53,822 INFO L276 IsEmpty]: Start isEmpty. Operand 20166 states and 24590 transitions. [2021-11-21 01:25:53,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-21 01:25:53,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:53,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:53,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:25:53,857 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:53,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:53,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1465849667, now seen corresponding path program 1 times [2021-11-21 01:25:53,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:53,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441249753] [2021-11-21 01:25:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:53,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:54,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:54,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441249753] [2021-11-21 01:25:54,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441249753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:54,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655628568] [2021-11-21 01:25:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:54,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:54,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:54,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:54,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:25:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:54,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:25:54,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:54,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:25:54,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655628568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:54,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:25:54,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-21 01:25:54,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056053869] [2021-11-21 01:25:54,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:54,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:54,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:54,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:54,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:54,621 INFO L87 Difference]: Start difference. First operand 20166 states and 24590 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:55,451 INFO L93 Difference]: Finished difference Result 40045 states and 49052 transitions. [2021-11-21 01:25:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:55,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 245 [2021-11-21 01:25:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:55,473 INFO L225 Difference]: With dead ends: 40045 [2021-11-21 01:25:55,474 INFO L226 Difference]: Without dead ends: 20166 [2021-11-21 01:25:55,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:25:55,487 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:55,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 243 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:25:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20166 states. [2021-11-21 01:25:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20166 to 19308. [2021-11-21 01:25:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19308 states, 19307 states have (on average 1.223390480136738) internal successors, (23620), 19307 states have internal predecessors, (23620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:55,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19308 states to 19308 states and 23620 transitions. [2021-11-21 01:25:55,825 INFO L78 Accepts]: Start accepts. Automaton has 19308 states and 23620 transitions. Word has length 245 [2021-11-21 01:25:55,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:55,826 INFO L470 AbstractCegarLoop]: Abstraction has 19308 states and 23620 transitions. [2021-11-21 01:25:55,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:55,826 INFO L276 IsEmpty]: Start isEmpty. Operand 19308 states and 23620 transitions. [2021-11-21 01:25:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-21 01:25:55,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:55,842 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:55,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:56,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 01:25:56,056 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:56,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:56,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1908387941, now seen corresponding path program 1 times [2021-11-21 01:25:56,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:56,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237178044] [2021-11-21 01:25:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:56,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:25:56,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:56,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237178044] [2021-11-21 01:25:56,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237178044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:56,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027216108] [2021-11-21 01:25:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:56,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:56,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:56,287 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:56,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:25:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:56,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:25:56,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:25:57,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:25:57,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027216108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:57,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:25:57,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-21 01:25:57,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709087204] [2021-11-21 01:25:57,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:57,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:25:57,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:25:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:25:57,327 INFO L87 Difference]: Start difference. First operand 19308 states and 23620 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:58,155 INFO L93 Difference]: Finished difference Result 41618 states and 51139 transitions. [2021-11-21 01:25:58,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:25:58,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 271 [2021-11-21 01:25:58,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:58,179 INFO L225 Difference]: With dead ends: 41618 [2021-11-21 01:25:58,179 INFO L226 Difference]: Without dead ends: 22883 [2021-11-21 01:25:58,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:25:58,193 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:58,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 183 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:25:58,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22883 states. [2021-11-21 01:25:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22883 to 20595. [2021-11-21 01:25:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20595 states, 20594 states have (on average 1.1970962416237738) internal successors, (24653), 20594 states have internal predecessors, (24653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20595 states to 20595 states and 24653 transitions. [2021-11-21 01:25:58,517 INFO L78 Accepts]: Start accepts. Automaton has 20595 states and 24653 transitions. Word has length 271 [2021-11-21 01:25:58,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:58,518 INFO L470 AbstractCegarLoop]: Abstraction has 20595 states and 24653 transitions. [2021-11-21 01:25:58,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:25:58,518 INFO L276 IsEmpty]: Start isEmpty. Operand 20595 states and 24653 transitions. [2021-11-21 01:25:58,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-21 01:25:58,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:58,536 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:58,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:58,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 01:25:58,756 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:58,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:58,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1889286485, now seen corresponding path program 1 times [2021-11-21 01:25:58,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:58,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349839840] [2021-11-21 01:25:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:58,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 68 proven. 6 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-21 01:25:58,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:58,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349839840] [2021-11-21 01:25:58,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349839840] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:58,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054492356] [2021-11-21 01:25:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:58,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:58,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:58,860 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:58,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:25:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:59,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:25:59,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 01:26:00,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:26:00,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054492356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:00,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:26:00,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-21 01:26:00,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381372777] [2021-11-21 01:26:00,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:00,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:26:00,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:26:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:00,753 INFO L87 Difference]: Start difference. First operand 20595 states and 24653 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:01,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:01,535 INFO L93 Difference]: Finished difference Result 49769 states and 59416 transitions. [2021-11-21 01:26:01,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:26:01,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 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 302 [2021-11-21 01:26:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:01,565 INFO L225 Difference]: With dead ends: 49769 [2021-11-21 01:26:01,566 INFO L226 Difference]: Without dead ends: 29747 [2021-11-21 01:26:01,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:01,579 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:01,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 256 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:26:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29747 states. [2021-11-21 01:26:01,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29747 to 28889. [2021-11-21 01:26:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28889 states, 28888 states have (on average 1.173013015785101) internal successors, (33886), 28888 states have internal predecessors, (33886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28889 states to 28889 states and 33886 transitions. [2021-11-21 01:26:02,031 INFO L78 Accepts]: Start accepts. Automaton has 28889 states and 33886 transitions. Word has length 302 [2021-11-21 01:26:02,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:02,031 INFO L470 AbstractCegarLoop]: Abstraction has 28889 states and 33886 transitions. [2021-11-21 01:26:02,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 28889 states and 33886 transitions. [2021-11-21 01:26:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-11-21 01:26:02,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:02,062 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:02,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 01:26:02,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:02,276 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:02,277 INFO L85 PathProgramCache]: Analyzing trace with hash 160288661, now seen corresponding path program 1 times [2021-11-21 01:26:02,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:02,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056449555] [2021-11-21 01:26:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:02,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 203 proven. 82 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 01:26:02,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:02,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056449555] [2021-11-21 01:26:02,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056449555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:02,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517376544] [2021-11-21 01:26:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:02,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:02,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:02,446 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:02,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:26:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:02,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:26:02,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 243 proven. 40 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-21 01:26:03,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 243 proven. 40 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-21 01:26:03,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517376544] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:03,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [953081170] [2021-11-21 01:26:03,975 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2021-11-21 01:26:03,975 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:03,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:26:03,985 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:26:03,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:35:16,881 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:35:44,337 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:35:44,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:35:44,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-21 01:35:44,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25264609] [2021-11-21 01:35:44,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:44,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:35:44,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:44,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:35:44,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=2304, Unknown=0, NotChecked=0, Total=2652 [2021-11-21 01:35:44,342 INFO L87 Difference]: Start difference. First operand 28889 states and 33886 transitions. Second operand has 7 states, 7 states have (on average 84.28571428571429) internal successors, (590), 6 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:49,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:49,394 INFO L93 Difference]: Finished difference Result 198070 states and 233905 transitions. [2021-11-21 01:35:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:35:49,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 84.28571428571429) internal successors, (590), 6 states have internal predecessors, (590), 0 states have call successors, (0), 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 347 [2021-11-21 01:35:49,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:49,542 INFO L225 Difference]: With dead ends: 198070 [2021-11-21 01:35:49,542 INFO L226 Difference]: Without dead ends: 169754 [2021-11-21 01:35:49,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1060 GetRequests, 905 SyntacticMatches, 87 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4079 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=588, Invalid=4242, Unknown=0, NotChecked=0, Total=4830 [2021-11-21 01:35:49,574 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 2372 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 3590 mSolverCounterSat, 1621 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2372 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 5211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1621 IncrementalHoareTripleChecker+Valid, 3590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:49,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2372 Valid, 357 Invalid, 5211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1621 Valid, 3590 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-21 01:35:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169754 states. [2021-11-21 01:35:51,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169754 to 104965. [2021-11-21 01:35:51,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104965 states, 104964 states have (on average 1.1561583018939827) internal successors, (121355), 104964 states have internal predecessors, (121355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104965 states to 104965 states and 121355 transitions. [2021-11-21 01:35:52,117 INFO L78 Accepts]: Start accepts. Automaton has 104965 states and 121355 transitions. Word has length 347 [2021-11-21 01:35:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:52,118 INFO L470 AbstractCegarLoop]: Abstraction has 104965 states and 121355 transitions. [2021-11-21 01:35:52,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.28571428571429) internal successors, (590), 6 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:52,118 INFO L276 IsEmpty]: Start isEmpty. Operand 104965 states and 121355 transitions. [2021-11-21 01:35:52,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2021-11-21 01:35:52,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:52,295 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:52,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:52,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-21 01:35:52,520 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:52,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:52,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1770497189, now seen corresponding path program 1 times [2021-11-21 01:35:52,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:52,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333105323] [2021-11-21 01:35:52,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:52,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 143 proven. 6 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2021-11-21 01:35:52,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:52,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333105323] [2021-11-21 01:35:52,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333105323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:35:52,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098091069] [2021-11-21 01:35:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:52,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:52,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:52,646 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:52,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:35:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:52,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:35:52,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-21 01:35:53,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:35:53,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098091069] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:53,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:35:53,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-21 01:35:53,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086256418] [2021-11-21 01:35:53,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:53,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:35:53,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:53,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:35:53,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:35:53,535 INFO L87 Difference]: Start difference. First operand 104965 states and 121355 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:54,872 INFO L93 Difference]: Finished difference Result 277999 states and 320328 transitions. [2021-11-21 01:35:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:35:54,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 382 [2021-11-21 01:35:54,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:55,260 INFO L225 Difference]: With dead ends: 277999 [2021-11-21 01:35:55,260 INFO L226 Difference]: Without dead ends: 173750 [2021-11-21 01:35:55,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:35:55,327 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 229 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:55,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 484 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:35:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173750 states. [2021-11-21 01:35:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173750 to 172604. [2021-11-21 01:35:58,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172604 states, 172603 states have (on average 1.1476393805437912) internal successors, (198086), 172603 states have internal predecessors, (198086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172604 states to 172604 states and 198086 transitions. [2021-11-21 01:35:58,581 INFO L78 Accepts]: Start accepts. Automaton has 172604 states and 198086 transitions. Word has length 382 [2021-11-21 01:35:58,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:58,582 INFO L470 AbstractCegarLoop]: Abstraction has 172604 states and 198086 transitions. [2021-11-21 01:35:58,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:58,582 INFO L276 IsEmpty]: Start isEmpty. Operand 172604 states and 198086 transitions. [2021-11-21 01:35:58,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-11-21 01:35:58,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:58,662 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:58,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-21 01:35:58,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 01:35:58,879 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:58,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash 679729027, now seen corresponding path program 1 times [2021-11-21 01:35:58,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:58,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983109340] [2021-11-21 01:35:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:58,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 366 proven. 0 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-11-21 01:35:59,363 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:59,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983109340] [2021-11-21 01:35:59,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983109340] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:59,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:59,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:35:59,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639340325] [2021-11-21 01:35:59,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:59,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:35:59,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:59,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:35:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:35:59,368 INFO L87 Difference]: Start difference. First operand 172604 states and 198086 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:01,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:01,269 INFO L93 Difference]: Finished difference Result 352643 states and 404260 transitions. [2021-11-21 01:36:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:36:01,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 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 403 [2021-11-21 01:36:01,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:01,495 INFO L225 Difference]: With dead ends: 352643 [2021-11-21 01:36:01,495 INFO L226 Difference]: Without dead ends: 180755 [2021-11-21 01:36:01,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:36:01,568 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 140 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:01,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 211 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:36:01,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180755 states. [2021-11-21 01:36:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180755 to 178467. [2021-11-21 01:36:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178467 states, 178466 states have (on average 1.1352190333172705) internal successors, (202598), 178466 states have internal predecessors, (202598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178467 states to 178467 states and 202598 transitions. [2021-11-21 01:36:04,619 INFO L78 Accepts]: Start accepts. Automaton has 178467 states and 202598 transitions. Word has length 403 [2021-11-21 01:36:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:04,620 INFO L470 AbstractCegarLoop]: Abstraction has 178467 states and 202598 transitions. [2021-11-21 01:36:04,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 178467 states and 202598 transitions. [2021-11-21 01:36:05,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-11-21 01:36:05,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:05,177 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:05,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 01:36:05,177 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:05,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1042259888, now seen corresponding path program 1 times [2021-11-21 01:36:05,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:05,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853610701] [2021-11-21 01:36:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:05,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 168 proven. 6 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-21 01:36:05,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:05,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853610701] [2021-11-21 01:36:05,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853610701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:36:05,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554511306] [2021-11-21 01:36:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:05,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:05,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:05,449 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:05,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:36:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:05,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:36:05,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 438 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-21 01:36:06,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:36:06,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554511306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:06,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:36:06,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-21 01:36:06,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146734152] [2021-11-21 01:36:06,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:06,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:36:06,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:06,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:36:06,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:36:06,554 INFO L87 Difference]: Start difference. First operand 178467 states and 202598 transitions. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:08,573 INFO L93 Difference]: Finished difference Result 376238 states and 426521 transitions. [2021-11-21 01:36:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:36:08,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 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 404 [2021-11-21 01:36:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:08,814 INFO L225 Difference]: With dead ends: 376238 [2021-11-21 01:36:08,814 INFO L226 Difference]: Without dead ends: 198487 [2021-11-21 01:36:08,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:36:08,885 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 125 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:08,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 242 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:36:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198487 states. [2021-11-21 01:36:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198487 to 194769. [2021-11-21 01:36:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194769 states, 194768 states have (on average 1.1230489608149183) internal successors, (218734), 194768 states have internal predecessors, (218734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:12,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194769 states to 194769 states and 218734 transitions. [2021-11-21 01:36:12,467 INFO L78 Accepts]: Start accepts. Automaton has 194769 states and 218734 transitions. Word has length 404 [2021-11-21 01:36:12,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:12,467 INFO L470 AbstractCegarLoop]: Abstraction has 194769 states and 218734 transitions. [2021-11-21 01:36:12,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:12,467 INFO L276 IsEmpty]: Start isEmpty. Operand 194769 states and 218734 transitions. [2021-11-21 01:36:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-11-21 01:36:12,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:12,546 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:12,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:12,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-21 01:36:12,747 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:12,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:12,747 INFO L85 PathProgramCache]: Analyzing trace with hash 493278566, now seen corresponding path program 1 times [2021-11-21 01:36:12,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:12,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470818306] [2021-11-21 01:36:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:12,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 170 proven. 6 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2021-11-21 01:36:12,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:12,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470818306] [2021-11-21 01:36:12,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470818306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:36:12,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160842414] [2021-11-21 01:36:12,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:12,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:12,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:12,878 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:12,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:36:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:13,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:36:13,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 456 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-21 01:36:14,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:36:14,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160842414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:14,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:36:14,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-21 01:36:14,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134861397] [2021-11-21 01:36:14,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:14,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:36:14,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:36:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:36:14,490 INFO L87 Difference]: Start difference. First operand 194769 states and 218734 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:16,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:16,577 INFO L93 Difference]: Finished difference Result 393684 states and 442387 transitions. [2021-11-21 01:36:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:36:16,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 408 [2021-11-21 01:36:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:16,860 INFO L225 Difference]: With dead ends: 393684 [2021-11-21 01:36:16,860 INFO L226 Difference]: Without dead ends: 199631 [2021-11-21 01:36:16,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:36:16,944 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 144 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:16,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 210 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:36:17,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199631 states. [2021-11-21 01:36:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199631 to 199202. [2021-11-21 01:36:20,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199202 states, 199201 states have (on average 1.1237744790437798) internal successors, (223857), 199201 states have internal predecessors, (223857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:21,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199202 states to 199202 states and 223857 transitions. [2021-11-21 01:36:21,078 INFO L78 Accepts]: Start accepts. Automaton has 199202 states and 223857 transitions. Word has length 408 [2021-11-21 01:36:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:21,078 INFO L470 AbstractCegarLoop]: Abstraction has 199202 states and 223857 transitions. [2021-11-21 01:36:21,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 199202 states and 223857 transitions. [2021-11-21 01:36:21,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-11-21 01:36:21,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:21,178 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:21,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:21,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b3ef86c-0e03-406e-a31c-1f9ff3652377/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-21 01:36:21,396 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:21,397 INFO L85 PathProgramCache]: Analyzing trace with hash -106793774, now seen corresponding path program 1 times [2021-11-21 01:36:21,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:21,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102415391] [2021-11-21 01:36:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:21,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 534 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-21 01:36:21,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:21,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102415391] [2021-11-21 01:36:21,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102415391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:36:21,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:36:21,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:36:21,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642521673] [2021-11-21 01:36:21,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:36:21,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:36:21,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:21,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:36:21,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:36:21,589 INFO L87 Difference]: Start difference. First operand 199202 states and 223857 transitions. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:23,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:23,693 INFO L93 Difference]: Finished difference Result 467474 states and 525457 transitions. [2021-11-21 01:36:23,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:36:23,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 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 435 [2021-11-21 01:36:23,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:24,013 INFO L225 Difference]: With dead ends: 467474 [2021-11-21 01:36:24,013 INFO L226 Difference]: Without dead ends: 268988 [2021-11-21 01:36:24,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:36:24,108 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 188 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:24,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 278 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:36:24,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268988 states.