./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label57.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label57.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan --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 1b3ff5d79b7436b9866ad9b80b9e60df1f87bc40 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 18:01:31,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:01:31,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:01:31,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:01:31,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:01:31,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:01:31,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:01:31,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:01:31,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:01:31,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:01:31,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:01:31,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:01:31,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:01:31,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:01:31,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:01:31,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:01:31,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:01:31,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:01:31,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:01:31,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:01:31,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:01:31,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:01:31,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:01:31,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:01:31,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:01:31,474 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:01:31,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:01:31,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:01:31,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:01:31,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:01:31,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:01:31,477 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:01:31,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:01:31,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:01:31,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:01:31,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:01:31,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:01:31,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:01:31,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:01:31,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:01:31,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:01:31,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 18:01:31,499 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:01:31,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:01:31,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:01:31,500 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:01:31,500 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:01:31,500 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:01:31,500 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 18:01:31,501 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:01:31,501 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:01:31,501 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 18:01:31,501 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 18:01:31,501 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:01:31,501 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 18:01:31,502 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 18:01:31,502 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 18:01:31,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:01:31,502 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 18:01:31,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 18:01:31,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 18:01:31,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:01:31,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 18:01:31,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:01:31,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 18:01:31,503 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 18:01:31,503 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 18:01:31,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 18:01:31,503 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:01:31,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 18:01:31,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:01:31,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:01:31,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:01:31,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:01:31,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:01:31,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 18:01:31,504 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 18:01:31,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 18:01:31,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 18:01:31,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:01:31,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:01:31,505 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-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b3ff5d79b7436b9866ad9b80b9e60df1f87bc40 [2020-12-09 18:01:31,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:01:31,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:01:31,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:01:31,704 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:01:31,704 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:01:31,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem03_label57.c [2020-12-09 18:01:31,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/data/5f434467b/b993c0e627724668bf473e0e06aa27b7/FLAG857e9b78a [2020-12-09 18:01:32,230 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:01:32,231 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/sv-benchmarks/c/eca-rers2012/Problem03_label57.c [2020-12-09 18:01:32,244 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/data/5f434467b/b993c0e627724668bf473e0e06aa27b7/FLAG857e9b78a [2020-12-09 18:01:32,255 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/data/5f434467b/b993c0e627724668bf473e0e06aa27b7 [2020-12-09 18:01:32,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:01:32,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:01:32,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:01:32,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:01:32,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:01:32,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:01:32" (1/1) ... [2020-12-09 18:01:32,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b6d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:32, skipping insertion in model container [2020-12-09 18:01:32,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:01:32" (1/1) ... [2020-12-09 18:01:32,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:01:32,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:01:32,656 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/sv-benchmarks/c/eca-rers2012/Problem03_label57.c[55951,55964] [2020-12-09 18:01:32,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:01:32,687 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:01:32,831 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/sv-benchmarks/c/eca-rers2012/Problem03_label57.c[55951,55964] [2020-12-09 18:01:32,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:01:32,857 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:01:32,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:32 WrapperNode [2020-12-09 18:01:32,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:01:32,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:01:32,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:01:32,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:01:32,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:32" (1/1) ... [2020-12-09 18:01:32,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:32" (1/1) ... [2020-12-09 18:01:32,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:01:32,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:01:32,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:01:32,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:01:32,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:32" (1/1) ... [2020-12-09 18:01:32,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:32" (1/1) ... [2020-12-09 18:01:32,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:32" (1/1) ... [2020-12-09 18:01:32,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:32" (1/1) ... [2020-12-09 18:01:33,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:32" (1/1) ... [2020-12-09 18:01:33,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:32" (1/1) ... [2020-12-09 18:01:33,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:32" (1/1) ... [2020-12-09 18:01:33,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:01:33,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:01:33,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:01:33,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:01:33,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:01:33,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 18:01:33,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 18:01:33,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:01:33,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:01:35,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:01:35,160 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 18:01:35,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:01:35 BoogieIcfgContainer [2020-12-09 18:01:35,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:01:35,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:01:35,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:01:35,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:01:35,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:01:32" (1/3) ... [2020-12-09 18:01:35,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0fcca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:01:35, skipping insertion in model container [2020-12-09 18:01:35,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:01:32" (2/3) ... [2020-12-09 18:01:35,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0fcca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:01:35, skipping insertion in model container [2020-12-09 18:01:35,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:01:35" (3/3) ... [2020-12-09 18:01:35,168 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label57.c [2020-12-09 18:01:35,178 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:01:35,181 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 18:01:35,188 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 18:01:35,209 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:01:35,209 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 18:01:35,209 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:01:35,209 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:01:35,209 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:01:35,209 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:01:35,209 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:01:35,209 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:01:35,223 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states. [2020-12-09 18:01:35,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-09 18:01:35,232 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:35,233 INFO L422 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] [2020-12-09 18:01:35,233 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:35,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:35,237 INFO L82 PathProgramCache]: Analyzing trace with hash 466746324, now seen corresponding path program 1 times [2020-12-09 18:01:35,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:35,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489490114] [2020-12-09 18:01:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:01:35,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489490114] [2020-12-09 18:01:35,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:01:35,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:01:35,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682726273] [2020-12-09 18:01:35,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:35,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:35,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:35,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:01:35,633 INFO L87 Difference]: Start difference. First operand 148 states. Second operand 3 states. [2020-12-09 18:01:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:36,231 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2020-12-09 18:01:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:36,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 143 [2020-12-09 18:01:36,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:36,242 INFO L225 Difference]: With dead ends: 440 [2020-12-09 18:01:36,242 INFO L226 Difference]: Without dead ends: 289 [2020-12-09 18:01:36,245 INFO L677 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 [2020-12-09 18:01:36,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-09 18:01:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2020-12-09 18:01:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-09 18:01:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 549 transitions. [2020-12-09 18:01:36,287 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 549 transitions. Word has length 143 [2020-12-09 18:01:36,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:36,288 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 549 transitions. [2020-12-09 18:01:36,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 549 transitions. [2020-12-09 18:01:36,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-09 18:01:36,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:36,291 INFO L422 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] [2020-12-09 18:01:36,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 18:01:36,291 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:36,292 INFO L82 PathProgramCache]: Analyzing trace with hash 865032792, now seen corresponding path program 1 times [2020-12-09 18:01:36,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:36,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884708743] [2020-12-09 18:01:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:01:36,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884708743] [2020-12-09 18:01:36,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:01:36,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:01:36,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556834434] [2020-12-09 18:01:36,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:36,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:36,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:36,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:01:36,367 INFO L87 Difference]: Start difference. First operand 289 states and 549 transitions. Second operand 3 states. [2020-12-09 18:01:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:36,819 INFO L93 Difference]: Finished difference Result 865 states and 1645 transitions. [2020-12-09 18:01:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:36,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-12-09 18:01:36,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:36,824 INFO L225 Difference]: With dead ends: 865 [2020-12-09 18:01:36,824 INFO L226 Difference]: Without dead ends: 577 [2020-12-09 18:01:36,826 INFO L677 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 [2020-12-09 18:01:36,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2020-12-09 18:01:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2020-12-09 18:01:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-12-09 18:01:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1000 transitions. [2020-12-09 18:01:36,854 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1000 transitions. Word has length 148 [2020-12-09 18:01:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:36,855 INFO L481 AbstractCegarLoop]: Abstraction has 575 states and 1000 transitions. [2020-12-09 18:01:36,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1000 transitions. [2020-12-09 18:01:36,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-09 18:01:36,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:36,859 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:01:36,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 18:01:36,859 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:36,859 INFO L82 PathProgramCache]: Analyzing trace with hash -925512781, now seen corresponding path program 1 times [2020-12-09 18:01:36,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:36,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250837341] [2020-12-09 18:01:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:01:36,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250837341] [2020-12-09 18:01:36,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335065550] [2020-12-09 18:01:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:01:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:37,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 18:01:37,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:01:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 18:01:37,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:01:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 18:01:37,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 18:01:37,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 4 [2020-12-09 18:01:37,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688996375] [2020-12-09 18:01:37,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:37,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:37,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:37,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:01:37,313 INFO L87 Difference]: Start difference. First operand 575 states and 1000 transitions. Second operand 3 states. [2020-12-09 18:01:37,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:37,825 INFO L93 Difference]: Finished difference Result 1721 states and 2997 transitions. [2020-12-09 18:01:37,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:37,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2020-12-09 18:01:37,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:37,831 INFO L225 Difference]: With dead ends: 1721 [2020-12-09 18:01:37,831 INFO L226 Difference]: Without dead ends: 1147 [2020-12-09 18:01:37,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:01:37,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2020-12-09 18:01:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2020-12-09 18:01:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1147 states. [2020-12-09 18:01:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1964 transitions. [2020-12-09 18:01:37,855 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1964 transitions. Word has length 150 [2020-12-09 18:01:37,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:37,856 INFO L481 AbstractCegarLoop]: Abstraction has 1147 states and 1964 transitions. [2020-12-09 18:01:37,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:37,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1964 transitions. [2020-12-09 18:01:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-09 18:01:37,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:37,860 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-12-09 18:01:38,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 18:01:38,060 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:38,061 INFO L82 PathProgramCache]: Analyzing trace with hash 603121689, now seen corresponding path program 1 times [2020-12-09 18:01:38,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:38,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697746608] [2020-12-09 18:01:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 18:01:38,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697746608] [2020-12-09 18:01:38,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:01:38,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:01:38,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834762638] [2020-12-09 18:01:38,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:38,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:38,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:38,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:01:38,122 INFO L87 Difference]: Start difference. First operand 1147 states and 1964 transitions. Second operand 3 states. [2020-12-09 18:01:38,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:38,716 INFO L93 Difference]: Finished difference Result 2865 states and 4883 transitions. [2020-12-09 18:01:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:38,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2020-12-09 18:01:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:38,726 INFO L225 Difference]: With dead ends: 2865 [2020-12-09 18:01:38,727 INFO L226 Difference]: Without dead ends: 1719 [2020-12-09 18:01:38,729 INFO L677 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 [2020-12-09 18:01:38,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2020-12-09 18:01:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2020-12-09 18:01:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1719 states. [2020-12-09 18:01:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2860 transitions. [2020-12-09 18:01:38,764 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2860 transitions. Word has length 160 [2020-12-09 18:01:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:38,764 INFO L481 AbstractCegarLoop]: Abstraction has 1719 states and 2860 transitions. [2020-12-09 18:01:38,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2860 transitions. [2020-12-09 18:01:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-09 18:01:38,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:38,768 INFO L422 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] [2020-12-09 18:01:38,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 18:01:38,768 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:38,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2119273739, now seen corresponding path program 1 times [2020-12-09 18:01:38,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:38,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287712559] [2020-12-09 18:01:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:01:38,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287712559] [2020-12-09 18:01:38,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:01:38,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:01:38,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032429889] [2020-12-09 18:01:38,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:38,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:38,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:38,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:01:38,828 INFO L87 Difference]: Start difference. First operand 1719 states and 2860 transitions. Second operand 3 states. [2020-12-09 18:01:39,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:39,338 INFO L93 Difference]: Finished difference Result 5153 states and 8577 transitions. [2020-12-09 18:01:39,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:39,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2020-12-09 18:01:39,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:39,351 INFO L225 Difference]: With dead ends: 5153 [2020-12-09 18:01:39,351 INFO L226 Difference]: Without dead ends: 3435 [2020-12-09 18:01:39,354 INFO L677 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 [2020-12-09 18:01:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-12-09 18:01:39,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2020-12-09 18:01:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3435 states. [2020-12-09 18:01:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4992 transitions. [2020-12-09 18:01:39,407 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4992 transitions. Word has length 162 [2020-12-09 18:01:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:39,408 INFO L481 AbstractCegarLoop]: Abstraction has 3435 states and 4992 transitions. [2020-12-09 18:01:39,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4992 transitions. [2020-12-09 18:01:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-09 18:01:39,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:39,413 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2020-12-09 18:01:39,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 18:01:39,413 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:39,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:39,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1976905867, now seen corresponding path program 1 times [2020-12-09 18:01:39,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:39,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224844681] [2020-12-09 18:01:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 18:01:39,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224844681] [2020-12-09 18:01:39,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:01:39,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:01:39,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780469313] [2020-12-09 18:01:39,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:39,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:39,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:39,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:01:39,467 INFO L87 Difference]: Start difference. First operand 3435 states and 4992 transitions. Second operand 3 states. [2020-12-09 18:01:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:39,950 INFO L93 Difference]: Finished difference Result 8585 states and 12509 transitions. [2020-12-09 18:01:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:39,950 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2020-12-09 18:01:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:39,968 INFO L225 Difference]: With dead ends: 8585 [2020-12-09 18:01:39,969 INFO L226 Difference]: Without dead ends: 5151 [2020-12-09 18:01:39,973 INFO L677 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 [2020-12-09 18:01:39,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2020-12-09 18:01:40,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 5151. [2020-12-09 18:01:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5151 states. [2020-12-09 18:01:40,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5151 states to 5151 states and 7368 transitions. [2020-12-09 18:01:40,052 INFO L78 Accepts]: Start accepts. Automaton has 5151 states and 7368 transitions. Word has length 165 [2020-12-09 18:01:40,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:40,052 INFO L481 AbstractCegarLoop]: Abstraction has 5151 states and 7368 transitions. [2020-12-09 18:01:40,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:40,052 INFO L276 IsEmpty]: Start isEmpty. Operand 5151 states and 7368 transitions. [2020-12-09 18:01:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-09 18:01:40,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:40,058 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1] [2020-12-09 18:01:40,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 18:01:40,059 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1922027113, now seen corresponding path program 1 times [2020-12-09 18:01:40,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:40,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563907418] [2020-12-09 18:01:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 18:01:40,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563907418] [2020-12-09 18:01:40,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:01:40,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:01:40,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645869034] [2020-12-09 18:01:40,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:40,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:40,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:40,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:01:40,142 INFO L87 Difference]: Start difference. First operand 5151 states and 7368 transitions. Second operand 3 states. [2020-12-09 18:01:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:40,450 INFO L93 Difference]: Finished difference Result 10015 states and 14284 transitions. [2020-12-09 18:01:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:40,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2020-12-09 18:01:40,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:40,467 INFO L225 Difference]: With dead ends: 10015 [2020-12-09 18:01:40,468 INFO L226 Difference]: Without dead ends: 4865 [2020-12-09 18:01:40,472 INFO L677 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 [2020-12-09 18:01:40,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4865 states. [2020-12-09 18:01:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4865 to 4865. [2020-12-09 18:01:40,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4865 states. [2020-12-09 18:01:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 6707 transitions. [2020-12-09 18:01:40,537 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 6707 transitions. Word has length 168 [2020-12-09 18:01:40,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:40,537 INFO L481 AbstractCegarLoop]: Abstraction has 4865 states and 6707 transitions. [2020-12-09 18:01:40,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:40,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 6707 transitions. [2020-12-09 18:01:40,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-09 18:01:40,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:40,541 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:01:40,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 18:01:40,541 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:40,542 INFO L82 PathProgramCache]: Analyzing trace with hash -422246888, now seen corresponding path program 1 times [2020-12-09 18:01:40,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:40,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368548778] [2020-12-09 18:01:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:01:40,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368548778] [2020-12-09 18:01:40,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396431690] [2020-12-09 18:01:40,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:01:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:40,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 18:01:40,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:01:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 18:01:40,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:01:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 18:01:40,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 18:01:40,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2020-12-09 18:01:40,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149291059] [2020-12-09 18:01:40,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:40,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:40,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:40,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:01:40,942 INFO L87 Difference]: Start difference. First operand 4865 states and 6707 transitions. Second operand 3 states. [2020-12-09 18:01:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:41,365 INFO L93 Difference]: Finished difference Result 11302 states and 15258 transitions. [2020-12-09 18:01:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:41,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2020-12-09 18:01:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:41,387 INFO L225 Difference]: With dead ends: 11302 [2020-12-09 18:01:41,387 INFO L226 Difference]: Without dead ends: 6438 [2020-12-09 18:01:41,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 359 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:01:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2020-12-09 18:01:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 6295. [2020-12-09 18:01:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6295 states. [2020-12-09 18:01:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6295 states to 6295 states and 8310 transitions. [2020-12-09 18:01:41,473 INFO L78 Accepts]: Start accepts. Automaton has 6295 states and 8310 transitions. Word has length 181 [2020-12-09 18:01:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:41,473 INFO L481 AbstractCegarLoop]: Abstraction has 6295 states and 8310 transitions. [2020-12-09 18:01:41,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 6295 states and 8310 transitions. [2020-12-09 18:01:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-09 18:01:41,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:41,480 INFO L422 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] [2020-12-09 18:01:41,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:01:41,681 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:41,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1831061472, now seen corresponding path program 1 times [2020-12-09 18:01:41,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:41,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348131723] [2020-12-09 18:01:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:01:41,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348131723] [2020-12-09 18:01:41,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:01:41,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:01:41,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807314437] [2020-12-09 18:01:41,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:41,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:41,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:41,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:01:41,834 INFO L87 Difference]: Start difference. First operand 6295 states and 8310 transitions. Second operand 3 states. [2020-12-09 18:01:42,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:42,302 INFO L93 Difference]: Finished difference Result 14734 states and 19604 transitions. [2020-12-09 18:01:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:42,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2020-12-09 18:01:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:42,323 INFO L225 Difference]: With dead ends: 14734 [2020-12-09 18:01:42,323 INFO L226 Difference]: Without dead ends: 8440 [2020-12-09 18:01:42,328 INFO L677 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 [2020-12-09 18:01:42,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8440 states. [2020-12-09 18:01:42,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8440 to 7868. [2020-12-09 18:01:42,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7868 states. [2020-12-09 18:01:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7868 states to 7868 states and 10097 transitions. [2020-12-09 18:01:42,410 INFO L78 Accepts]: Start accepts. Automaton has 7868 states and 10097 transitions. Word has length 217 [2020-12-09 18:01:42,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:42,410 INFO L481 AbstractCegarLoop]: Abstraction has 7868 states and 10097 transitions. [2020-12-09 18:01:42,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 7868 states and 10097 transitions. [2020-12-09 18:01:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-09 18:01:42,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:42,417 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:01:42,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 18:01:42,417 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash -635284085, now seen corresponding path program 1 times [2020-12-09 18:01:42,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:42,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599919487] [2020-12-09 18:01:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:01:42,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599919487] [2020-12-09 18:01:42,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357614626] [2020-12-09 18:01:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:01:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:42,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 18:01:42,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:01:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:01:42,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:01:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 18:01:42,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 18:01:42,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 4] total 6 [2020-12-09 18:01:42,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925244874] [2020-12-09 18:01:42,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:42,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:42,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:42,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:01:42,937 INFO L87 Difference]: Start difference. First operand 7868 states and 10097 transitions. Second operand 3 states. [2020-12-09 18:01:43,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:43,461 INFO L93 Difference]: Finished difference Result 19882 states and 25456 transitions. [2020-12-09 18:01:43,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:43,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2020-12-09 18:01:43,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:43,479 INFO L225 Difference]: With dead ends: 19882 [2020-12-09 18:01:43,479 INFO L226 Difference]: Without dead ends: 12015 [2020-12-09 18:01:43,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:01:43,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12015 states. [2020-12-09 18:01:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12015 to 11443. [2020-12-09 18:01:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11443 states. [2020-12-09 18:01:43,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11443 states to 11443 states and 14130 transitions. [2020-12-09 18:01:43,631 INFO L78 Accepts]: Start accepts. Automaton has 11443 states and 14130 transitions. Word has length 221 [2020-12-09 18:01:43,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:43,632 INFO L481 AbstractCegarLoop]: Abstraction has 11443 states and 14130 transitions. [2020-12-09 18:01:43,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 11443 states and 14130 transitions. [2020-12-09 18:01:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-12-09 18:01:43,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:43,652 INFO L422 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] [2020-12-09 18:01:43,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-09 18:01:43,853 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:43,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:43,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1794957722, now seen corresponding path program 1 times [2020-12-09 18:01:43,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:43,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548309531] [2020-12-09 18:01:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:01:44,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548309531] [2020-12-09 18:01:44,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:01:44,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:01:44,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226868605] [2020-12-09 18:01:44,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:44,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:44,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:44,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:01:44,131 INFO L87 Difference]: Start difference. First operand 11443 states and 14130 transitions. Second operand 3 states. [2020-12-09 18:01:44,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:44,664 INFO L93 Difference]: Finished difference Result 26031 states and 32069 transitions. [2020-12-09 18:01:44,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:44,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 245 [2020-12-09 18:01:44,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:44,681 INFO L225 Difference]: With dead ends: 26031 [2020-12-09 18:01:44,681 INFO L226 Difference]: Without dead ends: 14589 [2020-12-09 18:01:44,690 INFO L677 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 [2020-12-09 18:01:44,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14589 states. [2020-12-09 18:01:44,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14589 to 14446. [2020-12-09 18:01:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14446 states. [2020-12-09 18:01:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14446 states to 14446 states and 17188 transitions. [2020-12-09 18:01:44,867 INFO L78 Accepts]: Start accepts. Automaton has 14446 states and 17188 transitions. Word has length 245 [2020-12-09 18:01:44,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:44,867 INFO L481 AbstractCegarLoop]: Abstraction has 14446 states and 17188 transitions. [2020-12-09 18:01:44,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:44,867 INFO L276 IsEmpty]: Start isEmpty. Operand 14446 states and 17188 transitions. [2020-12-09 18:01:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-12-09 18:01:44,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:44,879 INFO L422 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] [2020-12-09 18:01:44,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 18:01:44,879 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:44,879 INFO L82 PathProgramCache]: Analyzing trace with hash -713083227, now seen corresponding path program 1 times [2020-12-09 18:01:44,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:44,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699378254] [2020-12-09 18:01:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:01:45,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699378254] [2020-12-09 18:01:45,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116073580] [2020-12-09 18:01:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:01:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:45,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 18:01:45,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:01:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 18:01:45,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:01:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 18:01:45,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 18:01:45,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-12-09 18:01:45,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388932313] [2020-12-09 18:01:45,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:45,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:45,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:45,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-09 18:01:45,883 INFO L87 Difference]: Start difference. First operand 14446 states and 17188 transitions. Second operand 3 states. [2020-12-09 18:01:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:46,380 INFO L93 Difference]: Finished difference Result 30893 states and 36789 transitions. [2020-12-09 18:01:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:46,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 271 [2020-12-09 18:01:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:46,394 INFO L225 Difference]: With dead ends: 30893 [2020-12-09 18:01:46,394 INFO L226 Difference]: Without dead ends: 16448 [2020-12-09 18:01:46,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-09 18:01:46,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16448 states. [2020-12-09 18:01:46,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16448 to 15447. [2020-12-09 18:01:46,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15447 states. [2020-12-09 18:01:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15447 states to 15447 states and 18387 transitions. [2020-12-09 18:01:46,547 INFO L78 Accepts]: Start accepts. Automaton has 15447 states and 18387 transitions. Word has length 271 [2020-12-09 18:01:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:46,547 INFO L481 AbstractCegarLoop]: Abstraction has 15447 states and 18387 transitions. [2020-12-09 18:01:46,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 15447 states and 18387 transitions. [2020-12-09 18:01:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-12-09 18:01:46,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:46,560 INFO L422 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, 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] [2020-12-09 18:01:46,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:01:46,762 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:46,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:46,763 INFO L82 PathProgramCache]: Analyzing trace with hash 654369811, now seen corresponding path program 1 times [2020-12-09 18:01:46,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:46,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858660999] [2020-12-09 18:01:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 130 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:01:46,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858660999] [2020-12-09 18:01:46,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145454019] [2020-12-09 18:01:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:01:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:47,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 18:01:47,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:01:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 18:01:47,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:01:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 18:01:47,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 18:01:47,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 6 [2020-12-09 18:01:47,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361561905] [2020-12-09 18:01:47,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:01:47,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:47,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:01:47,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:01:47,572 INFO L87 Difference]: Start difference. First operand 15447 states and 18387 transitions. Second operand 4 states. [2020-12-09 18:01:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:48,308 INFO L93 Difference]: Finished difference Result 35326 states and 41833 transitions. [2020-12-09 18:01:48,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:01:48,308 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 274 [2020-12-09 18:01:48,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:48,322 INFO L225 Difference]: With dead ends: 35326 [2020-12-09 18:01:48,322 INFO L226 Difference]: Without dead ends: 19880 [2020-12-09 18:01:48,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:01:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19880 states. [2020-12-09 18:01:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19880 to 17306. [2020-12-09 18:01:48,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17306 states. [2020-12-09 18:01:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17306 states to 17306 states and 20405 transitions. [2020-12-09 18:01:48,487 INFO L78 Accepts]: Start accepts. Automaton has 17306 states and 20405 transitions. Word has length 274 [2020-12-09 18:01:48,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:48,488 INFO L481 AbstractCegarLoop]: Abstraction has 17306 states and 20405 transitions. [2020-12-09 18:01:48,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:01:48,488 INFO L276 IsEmpty]: Start isEmpty. Operand 17306 states and 20405 transitions. [2020-12-09 18:01:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-12-09 18:01:48,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:48,504 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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] [2020-12-09 18:01:48,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-09 18:01:48,706 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:48,707 INFO L82 PathProgramCache]: Analyzing trace with hash 251391636, now seen corresponding path program 2 times [2020-12-09 18:01:48,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:48,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020092478] [2020-12-09 18:01:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 137 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:01:48,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020092478] [2020-12-09 18:01:48,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434349924] [2020-12-09 18:01:48,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:01:48,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 18:01:48,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:01:48,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 18:01:48,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:01:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 18:01:49,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:01:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 18:01:49,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 18:01:49,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-12-09 18:01:49,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417722886] [2020-12-09 18:01:49,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:49,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:49,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:49,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:01:49,273 INFO L87 Difference]: Start difference. First operand 17306 states and 20405 transitions. Second operand 3 states. [2020-12-09 18:01:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:49,738 INFO L93 Difference]: Finished difference Result 35612 states and 41992 transitions. [2020-12-09 18:01:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:49,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 281 [2020-12-09 18:01:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:49,752 INFO L225 Difference]: With dead ends: 35612 [2020-12-09 18:01:49,752 INFO L226 Difference]: Without dead ends: 18307 [2020-12-09 18:01:49,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:01:49,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18307 states. [2020-12-09 18:01:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18307 to 17449. [2020-12-09 18:01:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17449 states. [2020-12-09 18:01:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17449 states to 17449 states and 20567 transitions. [2020-12-09 18:01:49,922 INFO L78 Accepts]: Start accepts. Automaton has 17449 states and 20567 transitions. Word has length 281 [2020-12-09 18:01:49,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:49,923 INFO L481 AbstractCegarLoop]: Abstraction has 17449 states and 20567 transitions. [2020-12-09 18:01:49,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 17449 states and 20567 transitions. [2020-12-09 18:01:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-12-09 18:01:49,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:01:49,935 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:01:50,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:01:50,136 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:01:50,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:01:50,138 INFO L82 PathProgramCache]: Analyzing trace with hash 928833300, now seen corresponding path program 1 times [2020-12-09 18:01:50,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:01:50,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697328812] [2020-12-09 18:01:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:01:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 214 proven. 11 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-09 18:01:50,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697328812] [2020-12-09 18:01:50,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56356541] [2020-12-09 18:01:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:01:50,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:01:50,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 18:01:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:01:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-12-09 18:01:50,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:01:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-12-09 18:01:50,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 18:01:50,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2020-12-09 18:01:50,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555241596] [2020-12-09 18:01:50,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:01:50,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:01:50,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:01:50,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:01:50,991 INFO L87 Difference]: Start difference. First operand 17449 states and 20567 transitions. Second operand 3 states. [2020-12-09 18:01:51,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:01:51,432 INFO L93 Difference]: Finished difference Result 37040 states and 43958 transitions. [2020-12-09 18:01:51,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:01:51,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 362 [2020-12-09 18:01:51,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:01:51,433 INFO L225 Difference]: With dead ends: 37040 [2020-12-09 18:01:51,433 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 18:01:51,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 721 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:01:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 18:01:51,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 18:01:51,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 18:01:51,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 18:01:51,443 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 362 [2020-12-09 18:01:51,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:01:51,443 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 18:01:51,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:01:51,444 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 18:01:51,444 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 18:01:51,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-09 18:01:51,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 18:01:51,775 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 56 [2020-12-09 18:01:51,984 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-12-09 18:01:52,089 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-12-09 18:01:52,092 INFO L262 CegarLoopResult]: For program point L498(lines 498 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,092 INFO L262 CegarLoopResult]: For program point L432(lines 432 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,092 INFO L262 CegarLoopResult]: For program point L366(lines 366 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,092 INFO L262 CegarLoopResult]: For program point L763(lines 763 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,092 INFO L262 CegarLoopResult]: For program point L632(lines 632 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,092 INFO L262 CegarLoopResult]: For program point L566(lines 566 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,092 INFO L262 CegarLoopResult]: For program point L302(lines 302 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,092 INFO L262 CegarLoopResult]: For program point L1293(lines 1293 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,092 INFO L262 CegarLoopResult]: For program point L1360(lines 1360 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,092 INFO L262 CegarLoopResult]: For program point L1162(lines 1162 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,092 INFO L262 CegarLoopResult]: For program point L105(lines 105 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,092 INFO L262 CegarLoopResult]: For program point L1096(lines 1096 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L1031(lines 1031 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L965(lines 965 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L899(lines 899 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L174(lines 174 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L835(lines 835 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L771(lines 771 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L507(lines 507 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L243(lines 243 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L1433(lines 1433 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L376(lines 376 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L311(lines 311 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L1236(lines 1236 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L576(lines 576 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L444(lines 444 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L1369(lines 1369 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,093 INFO L262 CegarLoopResult]: For program point L1105(lines 1105 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L643(lines 643 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L1172(lines 1172 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L115(lines 115 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L248(lines 248 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L182(lines 182 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L1041(lines 1041 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L909(lines 909 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L711(lines 711 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L976(lines 976 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L779(lines 779 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L846(lines 846 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L451(lines 451 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L1442(lines 1442 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L584(lines 584 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L387(lines 387 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,094 INFO L262 CegarLoopResult]: For program point L1114(lines 1114 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L1048(lines 1048 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L322(lines 322 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L1247(lines 1247 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L124(lines 124 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L917(lines 917 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L719(lines 719 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L653(lines 653 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L191(lines 191 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L1315(lines 1315 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L258(lines 258 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L1183(lines 1183 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L985(lines 985 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L787(lines 787 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,095 INFO L262 CegarLoopResult]: For program point L523(lines 523 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L854(lines 854 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L460(lines 460 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L593(lines 593 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L1452(lines 1452 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L329(lines 329 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L1122(lines 1122 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L65(lines 65 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 1528) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L794(lines 794 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L1323(lines 1323 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L993(lines 993 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L927(lines 927 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L663(lines 663 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L267(lines 267 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L201(lines 201 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,096 INFO L262 CegarLoopResult]: For program point L1192(lines 1192 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,097 INFO L262 CegarLoopResult]: For program point L532(lines 532 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,097 INFO L262 CegarLoopResult]: For program point L1391(lines 1391 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,097 INFO L262 CegarLoopResult]: For program point L1259(lines 1259 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,097 INFO L262 CegarLoopResult]: For program point L136(lines 136 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,097 INFO L262 CegarLoopResult]: For program point L863(lines 863 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,097 INFO L262 CegarLoopResult]: For program point L1524-1(lines 64 1660) no Hoare annotation was computed. [2020-12-09 18:01:52,097 INFO L262 CegarLoopResult]: For program point L468(lines 468 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,097 INFO L262 CegarLoopResult]: For program point L1130(lines 1130 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,097 INFO L262 CegarLoopResult]: For program point L668(lines 668 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,097 INFO L258 CegarLoopResult]: At program point L1659(lines 64 1660) the Hoare annotation is: (let ((.cse3 (= ~a27~0 1)) (.cse1 (not (= ~a12~0 1))) (.cse0 (= ~a5~0 1)) (.cse4 (= ~a26~0 1)) (.cse2 (<= ~a3~0 1))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 (= ~a11~0 0)) (and .cse0 (<= ~a3~0 0)) (and .cse0 (<= 2 ~a3~0) .cse4) (and .cse0 (or (= ~a11~0 1) (= ~a6~0 1))) (and (= ~a6~0 0) .cse0 (<= ~a26~0 0) .cse3 .cse1) (and .cse0 (not .cse4) .cse2))) [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L602(lines 602 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L1527-1(lines 64 1660) no Hoare annotation was computed. [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L1528(line 1528) no Hoare annotation was computed. [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L1462(lines 1462 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L339(lines 339 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L1331(lines 1331 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,098 INFO L265 CegarLoopResult]: At program point L1662(lines 1662 1679) the Hoare annotation is: true [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L539(lines 539 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L407(lines 407 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L275(lines 275 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L1200(lines 1200 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L805(lines 805 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L145(lines 145 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L1004(lines 1004 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,098 INFO L262 CegarLoopResult]: For program point L1137(lines 1137 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,099 INFO L262 CegarLoopResult]: For program point L1071(lines 1071 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,099 INFO L262 CegarLoopResult]: For program point L873(lines 873 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,099 INFO L262 CegarLoopResult]: For program point L675(lines 675 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,099 INFO L262 CegarLoopResult]: For program point L477(lines 477 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,099 INFO L262 CegarLoopResult]: For program point L1336(lines 1336 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,099 INFO L262 CegarLoopResult]: For program point L743(lines 743 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,099 INFO L258 CegarLoopResult]: At program point L1668-2(lines 1668 1678) the Hoare annotation is: (let ((.cse3 (= ~a27~0 1)) (.cse1 (not (= ~a12~0 1))) (.cse0 (= ~a5~0 1)) (.cse4 (= ~a26~0 1)) (.cse2 (<= ~a3~0 1))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 (= ~a11~0 0)) (and .cse0 (<= ~a3~0 0)) (and .cse0 (<= 2 ~a3~0) .cse4) (and .cse0 (or (= ~a11~0 1) (= ~a6~0 1))) (and (= ~a6~0 0) .cse0 (<= ~a26~0 0) .cse3 .cse1) (and .cse0 (not .cse4) .cse2))) [2020-12-09 18:01:52,099 INFO L262 CegarLoopResult]: For program point L1470(lines 1470 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,099 INFO L262 CegarLoopResult]: For program point L83(lines 83 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,099 INFO L262 CegarLoopResult]: For program point L613(lines 613 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,099 INFO L262 CegarLoopResult]: For program point L415(lines 415 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,099 INFO L262 CegarLoopResult]: For program point L349(lines 349 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,099 INFO L262 CegarLoopResult]: For program point L1142(lines 1142 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,099 INFO L262 CegarLoopResult]: For program point L1076(lines 1076 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L878(lines 878 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L549(lines 549 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L1210(lines 1210 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L814(lines 814 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L1673(line 1673) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L286(lines 286 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L1013(lines 1013 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L947(lines 947 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L156(lines 156 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L685(lines 685 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L1412(lines 1412 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L1346(lines 1346 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L223(lines 223 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L92(lines 92 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,100 INFO L262 CegarLoopResult]: For program point L753(lines 753 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L1084(lines 1084 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L556(lines 556 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L490(lines 490 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L424(lines 424 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L358(lines 358 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L1284(lines 1284 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L1152(lines 1152 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L624(lines 624 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L294(lines 294 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L1021(lines 1021 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L823(lines 823 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L1220(lines 1220 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L957(lines 957 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L1354(lines 1354 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L165(lines 165 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L99(lines 99 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,101 INFO L262 CegarLoopResult]: For program point L694(lines 694 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,102 INFO L262 CegarLoopResult]: For program point L232(lines 232 1475) no Hoare annotation was computed. [2020-12-09 18:01:52,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:01:52 BoogieIcfgContainer [2020-12-09 18:01:52,119 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:01:52,120 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:01:52,120 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:01:52,120 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:01:52,120 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:01:35" (3/4) ... [2020-12-09 18:01:52,123 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 18:01:52,151 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 119 nodes and edges [2020-12-09 18:01:52,154 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-12-09 18:01:52,157 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-09 18:01:52,160 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-09 18:01:52,304 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0d130ba2-0137-45ff-9500-eb20d3c08915/bin/utaipan/witness.graphml [2020-12-09 18:01:52,304 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:01:52,305 INFO L168 Benchmark]: Toolchain (without parser) took 20047.12 ms. Allocated memory was 130.0 MB in the beginning and 851.4 MB in the end (delta: 721.4 MB). Free memory was 88.0 MB in the beginning and 207.6 MB in the end (delta: -119.6 MB). Peak memory consumption was 602.4 MB. Max. memory is 16.1 GB. [2020-12-09 18:01:52,305 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 130.0 MB. Free memory was 99.2 MB in the beginning and 99.2 MB in the end (delta: 24.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:01:52,306 INFO L168 Benchmark]: CACSL2BoogieTranslator took 598.63 ms. Allocated memory is still 130.0 MB. Free memory was 87.7 MB in the beginning and 56.2 MB in the end (delta: 31.5 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-12-09 18:01:52,306 INFO L168 Benchmark]: Boogie Procedure Inliner took 106.89 ms. Allocated memory was 130.0 MB in the beginning and 172.0 MB in the end (delta: 41.9 MB). Free memory was 56.2 MB in the beginning and 133.5 MB in the end (delta: -77.3 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. [2020-12-09 18:01:52,306 INFO L168 Benchmark]: Boogie Preprocessor took 85.57 ms. Allocated memory is still 172.0 MB. Free memory was 133.5 MB in the beginning and 121.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 18:01:52,306 INFO L168 Benchmark]: RCFGBuilder took 2111.13 ms. Allocated memory was 172.0 MB in the beginning and 222.3 MB in the end (delta: 50.3 MB). Free memory was 121.9 MB in the beginning and 92.1 MB in the end (delta: 29.8 MB). Peak memory consumption was 104.4 MB. Max. memory is 16.1 GB. [2020-12-09 18:01:52,306 INFO L168 Benchmark]: TraceAbstraction took 16955.30 ms. Allocated memory was 222.3 MB in the beginning and 851.4 MB in the end (delta: 629.1 MB). Free memory was 92.1 MB in the beginning and 244.7 MB in the end (delta: -152.6 MB). Peak memory consumption was 477.6 MB. Max. memory is 16.1 GB. [2020-12-09 18:01:52,307 INFO L168 Benchmark]: Witness Printer took 184.56 ms. Allocated memory is still 851.4 MB. Free memory was 244.7 MB in the beginning and 207.6 MB in the end (delta: 37.1 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-12-09 18:01:52,308 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 130.0 MB. Free memory was 99.2 MB in the beginning and 99.2 MB in the end (delta: 24.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 598.63 ms. Allocated memory is still 130.0 MB. Free memory was 87.7 MB in the beginning and 56.2 MB in the end (delta: 31.5 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 106.89 ms. Allocated memory was 130.0 MB in the beginning and 172.0 MB in the end (delta: 41.9 MB). Free memory was 56.2 MB in the beginning and 133.5 MB in the end (delta: -77.3 MB). Peak memory consumption was 17.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 85.57 ms. Allocated memory is still 172.0 MB. Free memory was 133.5 MB in the beginning and 121.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2111.13 ms. Allocated memory was 172.0 MB in the beginning and 222.3 MB in the end (delta: 50.3 MB). Free memory was 121.9 MB in the beginning and 92.1 MB in the end (delta: 29.8 MB). Peak memory consumption was 104.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16955.30 ms. Allocated memory was 222.3 MB in the beginning and 851.4 MB in the end (delta: 629.1 MB). Free memory was 92.1 MB in the beginning and 244.7 MB in the end (delta: -152.6 MB). Peak memory consumption was 477.6 MB. Max. memory is 16.1 GB. * Witness Printer took 184.56 ms. Allocated memory is still 851.4 MB. Free memory was 244.7 MB in the beginning and 207.6 MB in the end (delta: 37.1 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 1528]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 1662]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 1668]: Loop Invariant Derived loop invariant: (((((((a5 == 1 && !(a12 == 1)) && a3 <= 1) || ((a5 == 1 && a27 == 1) && a11 == 0)) || (a5 == 1 && a3 <= 0)) || ((a5 == 1 && 2 <= a3) && a26 == 1)) || (a5 == 1 && (a11 == 1 || a6 == 1))) || ((((a6 == 0 && a5 == 1) && a26 <= 0) && a27 == 1) && !(a12 == 1))) || ((a5 == 1 && !(a26 == 1)) && a3 <= 1) - InvariantResult [Line: 64]: Loop Invariant Derived loop invariant: (((((((a5 == 1 && !(a12 == 1)) && a3 <= 1) || ((a5 == 1 && a27 == 1) && a11 == 0)) || (a5 == 1 && a3 <= 0)) || ((a5 == 1 && 2 <= a3) && a26 == 1)) || (a5 == 1 && (a11 == 1 || a6 == 1))) || ((((a6 == 0 && a5 == 1) && a26 <= 0) && a27 == 1) && !(a12 == 1))) || ((a5 == 1 && !(a26 == 1)) && a3 <= 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 148 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.4s, OverallIterations: 15, TraceHistogramMax: 4, AutomataDifference: 7.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1922 SDtfs, 1059 SDslu, 94 SDs, 0 SdLazy, 6715 SolverSat, 1744 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3509 GetRequests, 3472 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17449occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 5865 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 257 NumberOfFragments, 157 HoareAnnotationTreeSize, 3 FomulaSimplifications, 10906 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 3 FomulaSimplificationsInter, 574 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 4888 NumberOfCodeBlocks, 4757 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 6599 ConstructedInterpolants, 0 QuantifiedInterpolants, 6193013 SizeOfPredicates, 52 NumberOfNonLiveVariables, 3137 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 29 InterpolantComputations, 21 PerfectInterpolantSequences, 2709/2967 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...