./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label29.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label29.c -s /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/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 4a846042d2e3a90f9afd312e363335049aaf47f7 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:51:49,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:51:49,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:51:49,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:51:49,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:51:49,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:51:49,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:51:49,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:51:49,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:51:49,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:51:49,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:51:49,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:51:49,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:51:49,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:51:49,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:51:49,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:51:49,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:51:49,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:51:49,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:51:49,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:51:49,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:51:49,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:51:49,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:51:49,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:51:49,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:51:49,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:51:49,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:51:49,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:51:49,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:51:49,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:51:49,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:51:49,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:51:49,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:51:49,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:51:49,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:51:49,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:51:49,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:51:49,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:51:49,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:51:49,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:51:49,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:51:49,623 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:51:49,676 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:51:49,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:51:49,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:51:49,679 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:51:49,679 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:51:49,679 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:51:49,680 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:51:49,680 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:51:49,680 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:51:49,680 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:51:49,682 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:51:49,682 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:51:49,682 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:51:49,683 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:51:49,683 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:51:49,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:51:49,684 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:51:49,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:51:49,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:51:49,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:51:49,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:51:49,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:51:49,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:51:49,686 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:51:49,686 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:51:49,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:51:49,687 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:51:49,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:51:49,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:51:49,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:51:49,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:51:49,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:51:49,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:51:49,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:51:49,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:51:49,691 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:51:49,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:51:49,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:51:49,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:51:49,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:51:49,693 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_34a21fef-a995-4c77-a197-8a915c5ab23d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a846042d2e3a90f9afd312e363335049aaf47f7 [2020-11-22 12:51:50,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:51:50,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:51:50,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:51:50,105 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:51:50,105 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:51:50,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label29.c [2020-11-22 12:51:50,208 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/bin/utaipan/data/5c7344e9b/35be4d507d5d4117999f021b1a142f3e/FLAG946e77dfd [2020-11-22 12:51:50,957 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:51:50,961 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/sv-benchmarks/c/eca-rers2012/Problem01_label29.c [2020-11-22 12:51:50,982 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/bin/utaipan/data/5c7344e9b/35be4d507d5d4117999f021b1a142f3e/FLAG946e77dfd [2020-11-22 12:51:51,139 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/bin/utaipan/data/5c7344e9b/35be4d507d5d4117999f021b1a142f3e [2020-11-22 12:51:51,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:51:51,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:51:51,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:51:51,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:51:51,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:51:51,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:51:51" (1/1) ... [2020-11-22 12:51:51,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3963459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:51, skipping insertion in model container [2020-11-22 12:51:51,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:51:51" (1/1) ... [2020-11-22 12:51:51,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:51:51,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:51:51,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:51:51,825 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:51:51,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:51:51,986 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:51:51,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:51 WrapperNode [2020-11-22 12:51:51,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:51:51,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:51:51,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:51:51,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:51:52,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:51" (1/1) ... [2020-11-22 12:51:52,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:51" (1/1) ... [2020-11-22 12:51:52,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:51:52,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:51:52,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:51:52,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:51:52,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:51" (1/1) ... [2020-11-22 12:51:52,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:51" (1/1) ... [2020-11-22 12:51:52,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:51" (1/1) ... [2020-11-22 12:51:52,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:51" (1/1) ... [2020-11-22 12:51:52,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:51" (1/1) ... [2020-11-22 12:51:52,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:51" (1/1) ... [2020-11-22 12:51:52,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:51" (1/1) ... [2020-11-22 12:51:52,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:51:52,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:51:52,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:51:52,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:51:52,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/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 [2020-11-22 12:51:52,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:51:52,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:51:52,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:51:52,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:51:54,913 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:51:54,913 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-22 12:51:54,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:51:54 BoogieIcfgContainer [2020-11-22 12:51:54,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:51:54,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:51:54,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:51:54,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:51:54,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:51:51" (1/3) ... [2020-11-22 12:51:54,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8c5e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:51:54, skipping insertion in model container [2020-11-22 12:51:54,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:51" (2/3) ... [2020-11-22 12:51:54,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8c5e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:51:54, skipping insertion in model container [2020-11-22 12:51:54,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:51:54" (3/3) ... [2020-11-22 12:51:54,926 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label29.c [2020-11-22 12:51:54,937 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:51:54,942 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 12:51:54,954 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 12:51:54,980 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:51:54,980 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:51:54,980 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:51:54,981 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:51:54,981 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:51:54,981 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:51:54,981 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:51:54,981 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:51:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-22 12:51:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-22 12:51:55,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:55,007 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] [2020-11-22 12:51:55,008 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:55,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:55,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1520707693, now seen corresponding path program 1 times [2020-11-22 12:51:55,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:55,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277512673] [2020-11-22 12:51:55,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:51:55,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277512673] [2020-11-22 12:51:55,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:55,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:51:55,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073901498] [2020-11-22 12:51:55,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:51:55,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:55,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:51:55,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:51:55,572 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-22 12:51:56,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:56,491 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-22 12:51:56,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:51:56,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-22 12:51:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:56,508 INFO L225 Difference]: With dead ends: 224 [2020-11-22 12:51:56,509 INFO L226 Difference]: Without dead ends: 145 [2020-11-22 12:51:56,512 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 [2020-11-22 12:51:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-22 12:51:56,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-22 12:51:56,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-22 12:51:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 265 transitions. [2020-11-22 12:51:56,587 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 265 transitions. Word has length 71 [2020-11-22 12:51:56,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:56,588 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 265 transitions. [2020-11-22 12:51:56,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:51:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 265 transitions. [2020-11-22 12:51:56,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-22 12:51:56,593 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:56,594 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-22 12:51:56,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:51:56,595 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:56,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1975138494, now seen corresponding path program 1 times [2020-11-22 12:51:56,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:56,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411798846] [2020-11-22 12:51:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:51:56,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411798846] [2020-11-22 12:51:56,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:56,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:51:56,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313302691] [2020-11-22 12:51:56,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:51:56,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:56,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:51:56,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:51:56,669 INFO L87 Difference]: Start difference. First operand 145 states and 265 transitions. Second operand 3 states. [2020-11-22 12:51:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:57,260 INFO L93 Difference]: Finished difference Result 431 states and 792 transitions. [2020-11-22 12:51:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:51:57,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-11-22 12:51:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:57,264 INFO L225 Difference]: With dead ends: 431 [2020-11-22 12:51:57,264 INFO L226 Difference]: Without dead ends: 287 [2020-11-22 12:51:57,266 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 [2020-11-22 12:51:57,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-22 12:51:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-22 12:51:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-22 12:51:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 485 transitions. [2020-11-22 12:51:57,288 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 485 transitions. Word has length 77 [2020-11-22 12:51:57,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:57,289 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 485 transitions. [2020-11-22 12:51:57,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:51:57,289 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 485 transitions. [2020-11-22 12:51:57,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-11-22 12:51:57,292 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:57,293 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-11-22 12:51:57,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:51:57,293 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash 790494617, now seen corresponding path program 1 times [2020-11-22 12:51:57,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:57,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418232174] [2020-11-22 12:51:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:51:57,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418232174] [2020-11-22 12:51:57,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:57,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:51:57,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725735727] [2020-11-22 12:51:57,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:51:57,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:57,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:51:57,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:51:57,383 INFO L87 Difference]: Start difference. First operand 287 states and 485 transitions. Second operand 3 states. [2020-11-22 12:51:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:57,847 INFO L93 Difference]: Finished difference Result 857 states and 1452 transitions. [2020-11-22 12:51:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:51:57,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2020-11-22 12:51:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:57,852 INFO L225 Difference]: With dead ends: 857 [2020-11-22 12:51:57,852 INFO L226 Difference]: Without dead ends: 571 [2020-11-22 12:51:57,854 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 [2020-11-22 12:51:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-22 12:51:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-11-22 12:51:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-22 12:51:57,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 895 transitions. [2020-11-22 12:51:57,888 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 895 transitions. Word has length 92 [2020-11-22 12:51:57,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:57,888 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 895 transitions. [2020-11-22 12:51:57,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:51:57,889 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 895 transitions. [2020-11-22 12:51:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-22 12:51:57,895 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:57,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:51:57,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:51:57,895 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:57,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:57,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1677273898, now seen corresponding path program 1 times [2020-11-22 12:51:57,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:57,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078167461] [2020-11-22 12:51:57,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 12:51:58,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078167461] [2020-11-22 12:51:58,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:58,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:51:58,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871649130] [2020-11-22 12:51:58,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:51:58,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:58,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:51:58,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:51:58,020 INFO L87 Difference]: Start difference. First operand 571 states and 895 transitions. Second operand 3 states. [2020-11-22 12:51:58,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:58,574 INFO L93 Difference]: Finished difference Result 1354 states and 2147 transitions. [2020-11-22 12:51:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:51:58,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2020-11-22 12:51:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:58,579 INFO L225 Difference]: With dead ends: 1354 [2020-11-22 12:51:58,580 INFO L226 Difference]: Without dead ends: 784 [2020-11-22 12:51:58,581 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 [2020-11-22 12:51:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-11-22 12:51:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2020-11-22 12:51:58,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-22 12:51:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1181 transitions. [2020-11-22 12:51:58,633 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1181 transitions. Word has length 99 [2020-11-22 12:51:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:58,634 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1181 transitions. [2020-11-22 12:51:58,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:51:58,634 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1181 transitions. [2020-11-22 12:51:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-22 12:51:58,638 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:58,638 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-22 12:51:58,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:51:58,639 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:58,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:58,639 INFO L82 PathProgramCache]: Analyzing trace with hash -448732172, now seen corresponding path program 1 times [2020-11-22 12:51:58,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:58,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519682772] [2020-11-22 12:51:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-22 12:51:58,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519682772] [2020-11-22 12:51:58,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:58,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:51:58,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352089190] [2020-11-22 12:51:58,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:51:58,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:58,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:51:58,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:51:58,714 INFO L87 Difference]: Start difference. First operand 784 states and 1181 transitions. Second operand 3 states. [2020-11-22 12:51:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:59,202 INFO L93 Difference]: Finished difference Result 1567 states and 2361 transitions. [2020-11-22 12:51:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:51:59,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2020-11-22 12:51:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:59,208 INFO L225 Difference]: With dead ends: 1567 [2020-11-22 12:51:59,208 INFO L226 Difference]: Without dead ends: 784 [2020-11-22 12:51:59,210 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 [2020-11-22 12:51:59,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-11-22 12:51:59,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2020-11-22 12:51:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-11-22 12:51:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1157 transitions. [2020-11-22 12:51:59,245 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1157 transitions. Word has length 103 [2020-11-22 12:51:59,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:59,247 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 1157 transitions. [2020-11-22 12:51:59,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:51:59,248 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1157 transitions. [2020-11-22 12:51:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-11-22 12:51:59,252 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:59,253 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:51:59,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 12:51:59,254 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:59,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2031844125, now seen corresponding path program 1 times [2020-11-22 12:51:59,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:59,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385539719] [2020-11-22 12:51:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-22 12:51:59,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385539719] [2020-11-22 12:51:59,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:59,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:51:59,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953346011] [2020-11-22 12:51:59,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:51:59,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:59,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:51:59,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:51:59,398 INFO L87 Difference]: Start difference. First operand 784 states and 1157 transitions. Second operand 3 states. [2020-11-22 12:51:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:59,910 INFO L93 Difference]: Finished difference Result 1922 states and 2813 transitions. [2020-11-22 12:51:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:51:59,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2020-11-22 12:51:59,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:59,917 INFO L225 Difference]: With dead ends: 1922 [2020-11-22 12:51:59,918 INFO L226 Difference]: Without dead ends: 926 [2020-11-22 12:51:59,919 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 [2020-11-22 12:51:59,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-22 12:51:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 713. [2020-11-22 12:51:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-22 12:51:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 862 transitions. [2020-11-22 12:51:59,953 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 862 transitions. Word has length 104 [2020-11-22 12:51:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:59,954 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 862 transitions. [2020-11-22 12:51:59,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:51:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 862 transitions. [2020-11-22 12:51:59,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-11-22 12:51:59,965 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:59,966 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-22 12:51:59,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 12:51:59,966 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:51:59,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:59,971 INFO L82 PathProgramCache]: Analyzing trace with hash -601370834, now seen corresponding path program 1 times [2020-11-22 12:51:59,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:59,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210058395] [2020-11-22 12:51:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-22 12:52:00,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210058395] [2020-11-22 12:52:00,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:52:00,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:52:00,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629736733] [2020-11-22 12:52:00,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:52:00,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:00,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:52:00,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:52:00,083 INFO L87 Difference]: Start difference. First operand 713 states and 862 transitions. Second operand 4 states. [2020-11-22 12:52:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:00,704 INFO L93 Difference]: Finished difference Result 1922 states and 2351 transitions. [2020-11-22 12:52:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:52:00,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-11-22 12:52:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:00,713 INFO L225 Difference]: With dead ends: 1922 [2020-11-22 12:52:00,713 INFO L226 Difference]: Without dead ends: 1210 [2020-11-22 12:52:00,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:52:00,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-22 12:52:00,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 855. [2020-11-22 12:52:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2020-11-22 12:52:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1028 transitions. [2020-11-22 12:52:00,743 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1028 transitions. Word has length 107 [2020-11-22 12:52:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:00,743 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 1028 transitions. [2020-11-22 12:52:00,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:52:00,744 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1028 transitions. [2020-11-22 12:52:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-22 12:52:00,746 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:52:00,747 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2020-11-22 12:52:00,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 12:52:00,747 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:52:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:52:00,748 INFO L82 PathProgramCache]: Analyzing trace with hash -704788412, now seen corresponding path program 1 times [2020-11-22 12:52:00,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:52:00,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130204481] [2020-11-22 12:52:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:52:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-22 12:52:00,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130204481] [2020-11-22 12:52:00,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:52:00,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:52:00,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235296664] [2020-11-22 12:52:00,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:52:00,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:00,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:52:00,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:52:00,810 INFO L87 Difference]: Start difference. First operand 855 states and 1028 transitions. Second operand 3 states. [2020-11-22 12:52:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:01,315 INFO L93 Difference]: Finished difference Result 2206 states and 2653 transitions. [2020-11-22 12:52:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:52:01,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-11-22 12:52:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:01,324 INFO L225 Difference]: With dead ends: 2206 [2020-11-22 12:52:01,325 INFO L226 Difference]: Without dead ends: 1352 [2020-11-22 12:52:01,326 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 [2020-11-22 12:52:01,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-22 12:52:01,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1139. [2020-11-22 12:52:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-22 12:52:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1372 transitions. [2020-11-22 12:52:01,362 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1372 transitions. Word has length 116 [2020-11-22 12:52:01,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:01,362 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1372 transitions. [2020-11-22 12:52:01,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:52:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1372 transitions. [2020-11-22 12:52:01,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-22 12:52:01,366 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:52:01,366 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-22 12:52:01,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 12:52:01,368 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:52:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:52:01,369 INFO L82 PathProgramCache]: Analyzing trace with hash 948507404, now seen corresponding path program 1 times [2020-11-22 12:52:01,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:52:01,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241219717] [2020-11-22 12:52:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:52:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-22 12:52:01,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241219717] [2020-11-22 12:52:01,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:52:01,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:52:01,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729286562] [2020-11-22 12:52:01,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:52:01,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:01,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:52:01,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:52:01,483 INFO L87 Difference]: Start difference. First operand 1139 states and 1372 transitions. Second operand 3 states. [2020-11-22 12:52:01,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:01,903 INFO L93 Difference]: Finished difference Result 2419 states and 2913 transitions. [2020-11-22 12:52:01,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:52:01,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-11-22 12:52:01,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:01,911 INFO L225 Difference]: With dead ends: 2419 [2020-11-22 12:52:01,912 INFO L226 Difference]: Without dead ends: 1281 [2020-11-22 12:52:01,913 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 [2020-11-22 12:52:01,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-22 12:52:01,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2020-11-22 12:52:01,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-11-22 12:52:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1532 transitions. [2020-11-22 12:52:01,951 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1532 transitions. Word has length 132 [2020-11-22 12:52:01,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:01,952 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1532 transitions. [2020-11-22 12:52:01,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:52:01,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1532 transitions. [2020-11-22 12:52:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-22 12:52:01,958 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:52:01,958 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-22 12:52:01,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 12:52:01,959 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:52:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:52:01,960 INFO L82 PathProgramCache]: Analyzing trace with hash -603133422, now seen corresponding path program 1 times [2020-11-22 12:52:01,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:52:01,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392979089] [2020-11-22 12:52:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:52:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-22 12:52:02,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392979089] [2020-11-22 12:52:02,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:52:02,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:52:02,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438312614] [2020-11-22 12:52:02,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:52:02,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:02,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:52:02,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:52:02,110 INFO L87 Difference]: Start difference. First operand 1281 states and 1532 transitions. Second operand 4 states. [2020-11-22 12:52:02,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:02,734 INFO L93 Difference]: Finished difference Result 2916 states and 3479 transitions. [2020-11-22 12:52:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:52:02,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2020-11-22 12:52:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:02,743 INFO L225 Difference]: With dead ends: 2916 [2020-11-22 12:52:02,744 INFO L226 Difference]: Without dead ends: 1636 [2020-11-22 12:52:02,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:52:02,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2020-11-22 12:52:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1494. [2020-11-22 12:52:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-11-22 12:52:02,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1762 transitions. [2020-11-22 12:52:02,788 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1762 transitions. Word has length 136 [2020-11-22 12:52:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:02,788 INFO L481 AbstractCegarLoop]: Abstraction has 1494 states and 1762 transitions. [2020-11-22 12:52:02,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:52:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1762 transitions. [2020-11-22 12:52:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-11-22 12:52:02,792 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:52:02,793 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:52:02,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-22 12:52:02,793 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:52:02,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:52:02,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1880050529, now seen corresponding path program 1 times [2020-11-22 12:52:02,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:52:02,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264849292] [2020-11-22 12:52:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:52:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-11-22 12:52:02,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264849292] [2020-11-22 12:52:02,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:52:02,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:52:02,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094811321] [2020-11-22 12:52:02,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:52:02,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:02,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:52:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:52:02,948 INFO L87 Difference]: Start difference. First operand 1494 states and 1762 transitions. Second operand 3 states. [2020-11-22 12:52:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:03,381 INFO L93 Difference]: Finished difference Result 3271 states and 3867 transitions. [2020-11-22 12:52:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:52:03,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2020-11-22 12:52:03,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:03,392 INFO L225 Difference]: With dead ends: 3271 [2020-11-22 12:52:03,392 INFO L226 Difference]: Without dead ends: 1707 [2020-11-22 12:52:03,396 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 [2020-11-22 12:52:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-11-22 12:52:03,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 997. [2020-11-22 12:52:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-22 12:52:03,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1186 transitions. [2020-11-22 12:52:03,429 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1186 transitions. Word has length 153 [2020-11-22 12:52:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:03,431 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1186 transitions. [2020-11-22 12:52:03,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:52:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1186 transitions. [2020-11-22 12:52:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-11-22 12:52:03,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:52:03,436 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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, 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] [2020-11-22 12:52:03,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-22 12:52:03,436 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:52:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:52:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1952542336, now seen corresponding path program 1 times [2020-11-22 12:52:03,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:52:03,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496310329] [2020-11-22 12:52:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:52:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 185 proven. 88 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-22 12:52:03,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496310329] [2020-11-22 12:52:03,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222707244] [2020-11-22 12:52:03,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/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 [2020-11-22 12:52:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:52:04,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-22 12:52:04,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:52:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-11-22 12:52:04,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:52:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-11-22 12:52:04,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 12:52:04,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-22 12:52:04,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832312243] [2020-11-22 12:52:04,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:52:04,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:52:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:52:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:52:04,509 INFO L87 Difference]: Start difference. First operand 997 states and 1186 transitions. Second operand 3 states. [2020-11-22 12:52:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:52:05,028 INFO L93 Difference]: Finished difference Result 2062 states and 2462 transitions. [2020-11-22 12:52:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:52:05,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 218 [2020-11-22 12:52:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:52:05,029 INFO L225 Difference]: With dead ends: 2062 [2020-11-22 12:52:05,030 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:52:05,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 434 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:52:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:52:05,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:52:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:52:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:52:05,033 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 218 [2020-11-22 12:52:05,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:52:05,033 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:52:05,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:52:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:52:05,033 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:52:05,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-22 12:52:05,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 12:52:05,514 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-22 12:52:05,514 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-22 12:52:05,514 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-22 12:52:05,514 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-22 12:52:05,514 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-22 12:52:05,514 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-22 12:52:05,514 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-22 12:52:05,514 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-22 12:52:05,514 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-22 12:52:05,514 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-22 12:52:05,515 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-22 12:52:05,515 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-22 12:52:05,515 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-22 12:52:05,515 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-22 12:52:05,515 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-22 12:52:05,515 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-22 12:52:05,518 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-22 12:52:05,518 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-22 12:52:05,518 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-22 12:52:05,518 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-22 12:52:05,518 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-22 12:52:05,518 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-22 12:52:05,518 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-22 12:52:05,518 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-22 12:52:05,519 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-22 12:52:05,519 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-22 12:52:05,519 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-22 12:52:05,519 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-22 12:52:05,519 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-22 12:52:05,519 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-22 12:52:05,519 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-22 12:52:05,519 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-22 12:52:05,519 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-22 12:52:05,519 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-22 12:52:05,519 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-22 12:52:05,520 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-22 12:52:05,520 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 12:52:05,520 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-22 12:52:05,520 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-22 12:52:05,520 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-22 12:52:05,520 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (= ~a21~0 1))) (or (and .cse0 (<= ~a17~0 0)) (and .cse0 (not (= ~a7~0 1)) (= ~a17~0 1)) (<= ~a8~0 13))) [2020-11-22 12:52:05,520 INFO L274 CegarLoopResult]: For program point L485-1(lines 40 585) no Hoare annotation was computed. [2020-11-22 12:52:05,521 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-22 12:52:05,521 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-22 12:52:05,521 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-22 12:52:05,521 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-22 12:52:05,521 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-22 12:52:05,521 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-22 12:52:05,521 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-22 12:52:05,521 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 12:52:05,521 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-22 12:52:05,521 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-22 12:52:05,521 INFO L274 CegarLoopResult]: For program point L488-1(lines 40 585) no Hoare annotation was computed. [2020-11-22 12:52:05,526 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-22 12:52:05,527 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-22 12:52:05,527 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-22 12:52:05,527 INFO L274 CegarLoopResult]: For program point L489(line 489) no Hoare annotation was computed. [2020-11-22 12:52:05,527 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-22 12:52:05,527 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-22 12:52:05,527 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-22 12:52:05,527 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-22 12:52:05,528 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-22 12:52:05,528 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-22 12:52:05,528 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-22 12:52:05,528 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-22 12:52:05,528 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-22 12:52:05,528 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-22 12:52:05,529 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (= ~a21~0 1))) (or (and .cse0 (<= ~a17~0 0)) (and .cse0 (not (= ~a7~0 1)) (= ~a17~0 1)) (<= ~a8~0 13))) [2020-11-22 12:52:05,529 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-22 12:52:05,529 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-22 12:52:05,529 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-22 12:52:05,529 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-22 12:52:05,530 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-22 12:52:05,530 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-22 12:52:05,530 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-22 12:52:05,530 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-22 12:52:05,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:52:05 BoogieIcfgContainer [2020-11-22 12:52:05,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:52:05,556 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:52:05,556 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:52:05,557 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:52:05,557 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:51:54" (3/4) ... [2020-11-22 12:52:05,560 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:52:05,594 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-11-22 12:52:05,595 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-22 12:52:05,597 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-22 12:52:05,599 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-22 12:52:05,773 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_34a21fef-a995-4c77-a197-8a915c5ab23d/bin/utaipan/witness.graphml [2020-11-22 12:52:05,773 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:52:05,775 INFO L168 Benchmark]: Toolchain (without parser) took 14629.76 ms. Allocated memory was 104.9 MB in the beginning and 270.5 MB in the end (delta: 165.7 MB). Free memory was 64.6 MB in the beginning and 158.9 MB in the end (delta: -94.4 MB). Peak memory consumption was 72.0 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,775 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 104.9 MB. Free memory is still 83.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:52:05,776 INFO L168 Benchmark]: CACSL2BoogieTranslator took 841.70 ms. Allocated memory is still 104.9 MB. Free memory was 64.4 MB in the beginning and 62.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,777 INFO L168 Benchmark]: Boogie Procedure Inliner took 101.59 ms. Allocated memory is still 104.9 MB. Free memory was 62.9 MB in the beginning and 57.3 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,777 INFO L168 Benchmark]: Boogie Preprocessor took 107.35 ms. Allocated memory is still 104.9 MB. Free memory was 57.3 MB in the beginning and 52.7 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,778 INFO L168 Benchmark]: RCFGBuilder took 2716.62 ms. Allocated memory was 104.9 MB in the beginning and 146.8 MB in the end (delta: 41.9 MB). Free memory was 52.7 MB in the beginning and 58.6 MB in the end (delta: -5.9 MB). Peak memory consumption was 61.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,778 INFO L168 Benchmark]: TraceAbstraction took 10638.30 ms. Allocated memory was 146.8 MB in the beginning and 270.5 MB in the end (delta: 123.7 MB). Free memory was 57.5 MB in the beginning and 174.7 MB in the end (delta: -117.1 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,779 INFO L168 Benchmark]: Witness Printer took 216.99 ms. Allocated memory is still 270.5 MB. Free memory was 174.7 MB in the beginning and 158.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-22 12:52:05,781 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 104.9 MB. Free memory is still 83.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 841.70 ms. Allocated memory is still 104.9 MB. Free memory was 64.4 MB in the beginning and 62.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 101.59 ms. Allocated memory is still 104.9 MB. Free memory was 62.9 MB in the beginning and 57.3 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 107.35 ms. Allocated memory is still 104.9 MB. Free memory was 57.3 MB in the beginning and 52.7 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2716.62 ms. Allocated memory was 104.9 MB in the beginning and 146.8 MB in the end (delta: 41.9 MB). Free memory was 52.7 MB in the beginning and 58.6 MB in the end (delta: -5.9 MB). Peak memory consumption was 61.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10638.30 ms. Allocated memory was 146.8 MB in the beginning and 270.5 MB in the end (delta: 123.7 MB). Free memory was 57.5 MB in the beginning and 174.7 MB in the end (delta: -117.1 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * Witness Printer took 216.99 ms. Allocated memory is still 270.5 MB. Free memory was 174.7 MB in the beginning and 158.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((a21 == 1 && a17 <= 0) || ((a21 == 1 && !(a7 == 1)) && a17 == 1)) || a8 <= 13 - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((a21 == 1 && a17 <= 0) || ((a21 == 1 && !(a7 == 1)) && a17 == 1)) || a8 <= 13 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.2s, OverallIterations: 12, TraceHistogramMax: 6, AutomataDifference: 6.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 503 SDtfs, 961 SDslu, 53 SDs, 0 SdLazy, 2575 SolverSat, 587 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 467 GetRequests, 448 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1494occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 1633 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 43 NumberOfFragments, 45 HoareAnnotationTreeSize, 3 FomulaSimplifications, 3000 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 100 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 1626 NumberOfCodeBlocks, 1626 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 1830 ConstructedInterpolants, 0 QuantifiedInterpolants, 945439 SizeOfPredicates, 1 NumberOfNonLiveVariables, 484 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 14 InterpolantComputations, 13 PerfectInterpolantSequences, 1440/1528 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...