./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label01.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_6d3ab202-51f8-4547-966f-530b108fb06d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label01.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/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 81c0ce4bbe6e9ab2e32ee97298c1b567b29fd94b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:35:54,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:35:54,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:35:54,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:35:54,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:35:54,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:35:54,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:35:54,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:35:54,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:35:54,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:35:54,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:35:54,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:35:54,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:35:54,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:35:54,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:35:54,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:35:54,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:35:54,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:35:54,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:35:54,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:35:54,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:35:54,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:35:54,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:35:54,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:35:54,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:35:54,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:35:54,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:35:54,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:35:54,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:35:54,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:35:54,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:35:54,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:35:54,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:35:54,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:35:54,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:35:54,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:35:54,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:35:54,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:35:54,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:35:54,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:35:54,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:35:54,679 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:35:54,704 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:35:54,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:35:54,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:35:54,705 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:35:54,705 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:35:54,706 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:35:54,706 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:35:54,706 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:35:54,706 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:35:54,706 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:35:54,707 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:35:54,707 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:35:54,707 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:35:54,707 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:35:54,707 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:35:54,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:35:54,708 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:35:54,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:35:54,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:35:54,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:35:54,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:35:54,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:35:54,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:35:54,710 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:35:54,710 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:35:54,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:35:54,711 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:35:54,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:35:54,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:35:54,711 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:35:54,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:35:54,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:35:54,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:35:54,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:35:54,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:35:54,713 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:35:54,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:35:54,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:35:54,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:35:54,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:35:54,714 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_6d3ab202-51f8-4547-966f-530b108fb06d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81c0ce4bbe6e9ab2e32ee97298c1b567b29fd94b [2020-11-28 07:35:55,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:35:55,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:35:55,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:35:55,089 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:35:55,089 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:35:55,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label01.c [2020-11-28 07:35:55,174 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/bin/utaipan/data/9c8e22c43/1e011483d4f340eba90553b1a033087f/FLAGcfed4238b [2020-11-28 07:35:55,749 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:35:55,749 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/sv-benchmarks/c/eca-rers2012/Problem01_label01.c [2020-11-28 07:35:55,761 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/bin/utaipan/data/9c8e22c43/1e011483d4f340eba90553b1a033087f/FLAGcfed4238b [2020-11-28 07:35:55,992 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/bin/utaipan/data/9c8e22c43/1e011483d4f340eba90553b1a033087f [2020-11-28 07:35:55,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:35:55,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:35:56,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:35:56,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:35:56,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:35:56,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:35:55" (1/1) ... [2020-11-28 07:35:56,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bef79e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:56, skipping insertion in model container [2020-11-28 07:35:56,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:35:55" (1/1) ... [2020-11-28 07:35:56,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:35:56,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:35:56,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:35:56,495 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:35:56,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:35:56,675 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:35:56,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:56 WrapperNode [2020-11-28 07:35:56,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:35:56,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:35:56,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:35:56,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:35:56,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:56" (1/1) ... [2020-11-28 07:35:56,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:56" (1/1) ... [2020-11-28 07:35:56,779 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:35:56,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:35:56,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:35:56,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:35:56,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:56" (1/1) ... [2020-11-28 07:35:56,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:56" (1/1) ... [2020-11-28 07:35:56,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:56" (1/1) ... [2020-11-28 07:35:56,796 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:56" (1/1) ... [2020-11-28 07:35:56,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:56" (1/1) ... [2020-11-28 07:35:56,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:56" (1/1) ... [2020-11-28 07:35:56,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:56" (1/1) ... [2020-11-28 07:35:56,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:35:56,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:35:56,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:35:56,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:35:56,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/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 [2020-11-28 07:35:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:35:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:35:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:35:56,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:35:59,567 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:35:59,568 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:35:59,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:35:59 BoogieIcfgContainer [2020-11-28 07:35:59,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:35:59,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:35:59,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:35:59,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:35:59,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:35:55" (1/3) ... [2020-11-28 07:35:59,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ec1458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:35:59, skipping insertion in model container [2020-11-28 07:35:59,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:56" (2/3) ... [2020-11-28 07:35:59,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ec1458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:35:59, skipping insertion in model container [2020-11-28 07:35:59,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:35:59" (3/3) ... [2020-11-28 07:35:59,579 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label01.c [2020-11-28 07:35:59,590 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:35:59,595 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:35:59,607 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:35:59,632 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:35:59,632 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:35:59,632 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:35:59,633 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:35:59,633 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:35:59,633 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:35:59,633 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:35:59,633 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:35:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:35:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:35:59,657 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:59,658 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] [2020-11-28 07:35:59,658 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:35:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:59,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1520705133, now seen corresponding path program 1 times [2020-11-28 07:35:59,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:59,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950525310] [2020-11-28 07:35:59,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:00,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950525310] [2020-11-28 07:36:00,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:00,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:36:00,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390650697] [2020-11-28 07:36:00,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:36:00,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:00,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:36:00,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:00,085 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:36:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:00,889 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:36:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:36:00,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:36:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:00,914 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:36:00,914 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:36:00,919 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 [2020-11-28 07:36:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:36:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:36:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:36:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-28 07:36:01,000 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-28 07:36:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:01,001 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-28 07:36:01,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:36:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-28 07:36:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-28 07:36:01,005 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:01,006 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] [2020-11-28 07:36:01,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:36:01,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:01,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:01,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1975141054, now seen corresponding path program 1 times [2020-11-28 07:36:01,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:01,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809778655] [2020-11-28 07:36:01,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:01,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809778655] [2020-11-28 07:36:01,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:01,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:36:01,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045896283] [2020-11-28 07:36:01,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:36:01,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:01,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:36:01,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:01,095 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-28 07:36:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:01,774 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-11-28 07:36:01,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:36:01,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-11-28 07:36:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:01,778 INFO L225 Difference]: With dead ends: 431 [2020-11-28 07:36:01,778 INFO L226 Difference]: Without dead ends: 287 [2020-11-28 07:36:01,780 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 [2020-11-28 07:36:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-28 07:36:01,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-28 07:36:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:36:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 503 transitions. [2020-11-28 07:36:01,800 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 503 transitions. Word has length 77 [2020-11-28 07:36:01,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:01,800 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 503 transitions. [2020-11-28 07:36:01,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:36:01,801 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 503 transitions. [2020-11-28 07:36:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-28 07:36:01,813 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:01,813 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:01,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:36:01,814 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:01,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:01,815 INFO L82 PathProgramCache]: Analyzing trace with hash -55059217, now seen corresponding path program 1 times [2020-11-28 07:36:01,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:01,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240852244] [2020-11-28 07:36:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:01,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240852244] [2020-11-28 07:36:01,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:01,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:36:01,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712173357] [2020-11-28 07:36:01,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:36:01,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:01,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:36:01,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:36:01,961 INFO L87 Difference]: Start difference. First operand 287 states and 503 transitions. Second operand 4 states. [2020-11-28 07:36:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:02,887 INFO L93 Difference]: Finished difference Result 928 states and 1612 transitions. [2020-11-28 07:36:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:36:02,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-11-28 07:36:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:02,893 INFO L225 Difference]: With dead ends: 928 [2020-11-28 07:36:02,893 INFO L226 Difference]: Without dead ends: 642 [2020-11-28 07:36:02,896 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 [2020-11-28 07:36:02,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2020-11-28 07:36:02,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 571. [2020-11-28 07:36:02,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-28 07:36:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 859 transitions. [2020-11-28 07:36:02,945 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 859 transitions. Word has length 97 [2020-11-28 07:36:02,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:02,948 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 859 transitions. [2020-11-28 07:36:02,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:36:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 859 transitions. [2020-11-28 07:36:02,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-28 07:36:02,956 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:02,956 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 07:36:02,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:36:02,956 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:02,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1430995001, now seen corresponding path program 1 times [2020-11-28 07:36:02,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:02,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412039567] [2020-11-28 07:36:02,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-28 07:36:03,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412039567] [2020-11-28 07:36:03,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:03,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:36:03,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199736762] [2020-11-28 07:36:03,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:36:03,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:03,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:36:03,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:03,084 INFO L87 Difference]: Start difference. First operand 571 states and 859 transitions. Second operand 3 states. [2020-11-28 07:36:03,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:03,614 INFO L93 Difference]: Finished difference Result 1354 states and 2033 transitions. [2020-11-28 07:36:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:36:03,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-11-28 07:36:03,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:03,619 INFO L225 Difference]: With dead ends: 1354 [2020-11-28 07:36:03,620 INFO L226 Difference]: Without dead ends: 784 [2020-11-28 07:36:03,621 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 [2020-11-28 07:36:03,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-11-28 07:36:03,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 642. [2020-11-28 07:36:03,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 642 states. [2020-11-28 07:36:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 937 transitions. [2020-11-28 07:36:03,659 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 937 transitions. Word has length 101 [2020-11-28 07:36:03,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:03,659 INFO L481 AbstractCegarLoop]: Abstraction has 642 states and 937 transitions. [2020-11-28 07:36:03,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:36:03,659 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 937 transitions. [2020-11-28 07:36:03,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-11-28 07:36:03,667 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:03,668 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:03,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:36:03,669 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:03,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:03,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1770500595, now seen corresponding path program 1 times [2020-11-28 07:36:03,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:03,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344991608] [2020-11-28 07:36:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-11-28 07:36:03,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344991608] [2020-11-28 07:36:03,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:03,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:36:03,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760791110] [2020-11-28 07:36:03,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:36:03,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:03,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:36:03,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:36:03,805 INFO L87 Difference]: Start difference. First operand 642 states and 937 transitions. Second operand 4 states. [2020-11-28 07:36:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:04,525 INFO L93 Difference]: Finished difference Result 1780 states and 2568 transitions. [2020-11-28 07:36:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:36:04,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-11-28 07:36:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:04,533 INFO L225 Difference]: With dead ends: 1780 [2020-11-28 07:36:04,533 INFO L226 Difference]: Without dead ends: 997 [2020-11-28 07:36:04,535 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 [2020-11-28 07:36:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-28 07:36:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 926. [2020-11-28 07:36:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-28 07:36:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1174 transitions. [2020-11-28 07:36:04,591 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1174 transitions. Word has length 105 [2020-11-28 07:36:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:04,591 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1174 transitions. [2020-11-28 07:36:04,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:36:04,591 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1174 transitions. [2020-11-28 07:36:04,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-28 07:36:04,594 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:04,595 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-11-28 07:36:04,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:36:04,595 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:04,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:04,596 INFO L82 PathProgramCache]: Analyzing trace with hash 310662481, now seen corresponding path program 1 times [2020-11-28 07:36:04,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:04,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839579401] [2020-11-28 07:36:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-11-28 07:36:04,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839579401] [2020-11-28 07:36:04,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:04,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:36:04,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485014139] [2020-11-28 07:36:04,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:36:04,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:04,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:36:04,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:04,741 INFO L87 Difference]: Start difference. First operand 926 states and 1174 transitions. Second operand 3 states. [2020-11-28 07:36:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:05,138 INFO L93 Difference]: Finished difference Result 1851 states and 2347 transitions. [2020-11-28 07:36:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:36:05,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2020-11-28 07:36:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:05,144 INFO L225 Difference]: With dead ends: 1851 [2020-11-28 07:36:05,144 INFO L226 Difference]: Without dead ends: 926 [2020-11-28 07:36:05,150 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 [2020-11-28 07:36:05,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-11-28 07:36:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 926. [2020-11-28 07:36:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-11-28 07:36:05,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1160 transitions. [2020-11-28 07:36:05,187 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1160 transitions. Word has length 130 [2020-11-28 07:36:05,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:05,190 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1160 transitions. [2020-11-28 07:36:05,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:36:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1160 transitions. [2020-11-28 07:36:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-11-28 07:36:05,199 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:05,200 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 07:36:05,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:36:05,200 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:05,204 INFO L82 PathProgramCache]: Analyzing trace with hash -192425370, now seen corresponding path program 1 times [2020-11-28 07:36:05,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:05,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759146045] [2020-11-28 07:36:05,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-11-28 07:36:05,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759146045] [2020-11-28 07:36:05,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:05,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:36:05,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377900862] [2020-11-28 07:36:05,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:36:05,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:05,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:36:05,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:36:05,315 INFO L87 Difference]: Start difference. First operand 926 states and 1160 transitions. Second operand 4 states. [2020-11-28 07:36:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:05,895 INFO L93 Difference]: Finished difference Result 1922 states and 2401 transitions. [2020-11-28 07:36:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:36:05,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 173 [2020-11-28 07:36:05,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:05,902 INFO L225 Difference]: With dead ends: 1922 [2020-11-28 07:36:05,902 INFO L226 Difference]: Without dead ends: 997 [2020-11-28 07:36:05,904 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 [2020-11-28 07:36:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-28 07:36:05,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2020-11-28 07:36:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-28 07:36:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1229 transitions. [2020-11-28 07:36:05,945 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1229 transitions. Word has length 173 [2020-11-28 07:36:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:05,945 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1229 transitions. [2020-11-28 07:36:05,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:36:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1229 transitions. [2020-11-28 07:36:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-11-28 07:36:05,949 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:05,950 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 07:36:05,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:36:05,950 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:05,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:05,951 INFO L82 PathProgramCache]: Analyzing trace with hash -862286855, now seen corresponding path program 1 times [2020-11-28 07:36:05,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:05,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117070837] [2020-11-28 07:36:05,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-11-28 07:36:06,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117070837] [2020-11-28 07:36:06,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:06,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:36:06,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738604609] [2020-11-28 07:36:06,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:36:06,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:06,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:36:06,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:06,133 INFO L87 Difference]: Start difference. First operand 997 states and 1229 transitions. Second operand 3 states. [2020-11-28 07:36:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:06,678 INFO L93 Difference]: Finished difference Result 2277 states and 2821 transitions. [2020-11-28 07:36:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:36:06,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2020-11-28 07:36:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:06,688 INFO L225 Difference]: With dead ends: 2277 [2020-11-28 07:36:06,688 INFO L226 Difference]: Without dead ends: 1281 [2020-11-28 07:36:06,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-28 07:36:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1068. [2020-11-28 07:36:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-11-28 07:36:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1321 transitions. [2020-11-28 07:36:06,726 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1321 transitions. Word has length 190 [2020-11-28 07:36:06,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:06,727 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1321 transitions. [2020-11-28 07:36:06,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:36:06,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1321 transitions. [2020-11-28 07:36:06,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-11-28 07:36:06,733 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:06,733 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:06,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:36:06,735 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1088019248, now seen corresponding path program 1 times [2020-11-28 07:36:06,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:06,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288146770] [2020-11-28 07:36:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 275 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-11-28 07:36:06,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288146770] [2020-11-28 07:36:06,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:06,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:36:06,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631771165] [2020-11-28 07:36:06,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:36:06,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:06,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:36:06,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:36:06,986 INFO L87 Difference]: Start difference. First operand 1068 states and 1321 transitions. Second operand 4 states. [2020-11-28 07:36:07,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:07,545 INFO L93 Difference]: Finished difference Result 2309 states and 2826 transitions. [2020-11-28 07:36:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:36:07,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 239 [2020-11-28 07:36:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:07,553 INFO L225 Difference]: With dead ends: 2309 [2020-11-28 07:36:07,554 INFO L226 Difference]: Without dead ends: 1242 [2020-11-28 07:36:07,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:36:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2020-11-28 07:36:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1139. [2020-11-28 07:36:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:36:07,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1374 transitions. [2020-11-28 07:36:07,632 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1374 transitions. Word has length 239 [2020-11-28 07:36:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:07,633 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1374 transitions. [2020-11-28 07:36:07,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:36:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1374 transitions. [2020-11-28 07:36:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-11-28 07:36:07,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:07,641 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2020-11-28 07:36:07,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:36:07,641 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:07,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:07,642 INFO L82 PathProgramCache]: Analyzing trace with hash 177007561, now seen corresponding path program 1 times [2020-11-28 07:36:07,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:07,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807666659] [2020-11-28 07:36:07,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-11-28 07:36:07,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807666659] [2020-11-28 07:36:07,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:36:07,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:36:07,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200220999] [2020-11-28 07:36:07,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:36:07,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:07,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:36:07,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:36:07,814 INFO L87 Difference]: Start difference. First operand 1139 states and 1374 transitions. Second operand 3 states. [2020-11-28 07:36:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:08,280 INFO L93 Difference]: Finished difference Result 2277 states and 2747 transitions. [2020-11-28 07:36:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:36:08,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 252 [2020-11-28 07:36:08,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:08,287 INFO L225 Difference]: With dead ends: 2277 [2020-11-28 07:36:08,288 INFO L226 Difference]: Without dead ends: 1139 [2020-11-28 07:36:08,291 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 [2020-11-28 07:36:08,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-11-28 07:36:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2020-11-28 07:36:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:36:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1325 transitions. [2020-11-28 07:36:08,325 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1325 transitions. Word has length 252 [2020-11-28 07:36:08,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:08,326 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1325 transitions. [2020-11-28 07:36:08,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:36:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1325 transitions. [2020-11-28 07:36:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-11-28 07:36:08,331 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:08,332 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:08,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 07:36:08,332 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:08,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:08,333 INFO L82 PathProgramCache]: Analyzing trace with hash 784145127, now seen corresponding path program 1 times [2020-11-28 07:36:08,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:08,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713394504] [2020-11-28 07:36:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 226 proven. 131 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-11-28 07:36:08,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713394504] [2020-11-28 07:36:08,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992219921] [2020-11-28 07:36:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/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 [2020-11-28 07:36:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:08,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:36:08,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:36:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-11-28 07:36:09,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:36:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 291 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-11-28 07:36:09,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:36:09,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-11-28 07:36:09,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493293088] [2020-11-28 07:36:09,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:36:09,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:09,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:36:09,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:36:09,285 INFO L87 Difference]: Start difference. First operand 1139 states and 1325 transitions. Second operand 3 states. [2020-11-28 07:36:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:09,799 INFO L93 Difference]: Finished difference Result 2490 states and 2915 transitions. [2020-11-28 07:36:09,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:36:09,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 261 [2020-11-28 07:36:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:09,808 INFO L225 Difference]: With dead ends: 2490 [2020-11-28 07:36:09,808 INFO L226 Difference]: Without dead ends: 1352 [2020-11-28 07:36:09,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 521 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:36:09,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-28 07:36:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1210. [2020-11-28 07:36:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:36:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1409 transitions. [2020-11-28 07:36:09,862 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1409 transitions. Word has length 261 [2020-11-28 07:36:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:09,863 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1409 transitions. [2020-11-28 07:36:09,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:36:09,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1409 transitions. [2020-11-28 07:36:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-11-28 07:36:09,870 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:09,871 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:10,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-28 07:36:10,097 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:10,098 INFO L82 PathProgramCache]: Analyzing trace with hash 968671350, now seen corresponding path program 1 times [2020-11-28 07:36:10,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:10,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953803004] [2020-11-28 07:36:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 313 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:36:10,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953803004] [2020-11-28 07:36:10,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581317869] [2020-11-28 07:36:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:36:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:36:11,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:36:11,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:36:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-11-28 07:36:11,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:36:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-11-28 07:36:11,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:36:11,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2020-11-28 07:36:11,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358147589] [2020-11-28 07:36:11,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:36:11,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:36:11,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:36:11,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:36:11,283 INFO L87 Difference]: Start difference. First operand 1210 states and 1409 transitions. Second operand 3 states. [2020-11-28 07:36:11,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:36:11,747 INFO L93 Difference]: Finished difference Result 2488 states and 2865 transitions. [2020-11-28 07:36:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:36:11,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 274 [2020-11-28 07:36:11,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:36:11,749 INFO L225 Difference]: With dead ends: 2488 [2020-11-28 07:36:11,749 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:36:11,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 545 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:36:11,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:36:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:36:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:36:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:36:11,756 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 274 [2020-11-28 07:36:11,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:36:11,757 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:36:11,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:36:11,757 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:36:11,757 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:36:11,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 07:36:11,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:36:12,576 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-11-28 07:36:13,094 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-11-28 07:36:13,097 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:36:13,097 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:36:13,097 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:36:13,098 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:36:13,099 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:36:13,100 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:36:13,100 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:36:13,100 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:36:13,100 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:36:13,100 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:36:13,100 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:36:13,100 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:36:13,100 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:36:13,100 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse6 (= ~a20~0 1))) (let ((.cse5 (= ~a21~0 1)) (.cse3 (not (= ~a7~0 1))) (.cse2 (= ~a17~0 1)) (.cse10 (<= ~a16~0 4)) (.cse1 (<= ~a21~0 0)) (.cse9 (= ~a16~0 6)) (.cse8 (<= 15 ~a8~0)) (.cse7 (<= 14 ~a8~0)) (.cse0 (<= ~a16~0 5)) (.cse4 (not .cse6))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse4) (and .cse5 .cse6 .cse3 .cse2) (and .cse7 (or (and .cse5 .cse0) (and .cse5 .cse6 .cse8))) (and .cse9 .cse1 .cse6) (and .cse5 .cse10 .cse3) (and .cse10 .cse6 .cse2) (and .cse10 .cse1 .cse6) (and .cse9 .cse4 .cse8) (and .cse7 .cse0 .cse4)))) [2020-11-28 07:36:13,101 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:36:13,101 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:36:13,101 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:36:13,101 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:36:13,101 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:36:13,101 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:36:13,101 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:36:13,101 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:36:13,101 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:36:13,101 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:36:13,101 INFO L274 CegarLoopResult]: For program point L455-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:36:13,101 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:36:13,101 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:36:13,102 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:36:13,102 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:36:13,102 INFO L274 CegarLoopResult]: For program point L458-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:36:13,102 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:36:13,102 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:36:13,102 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:36:13,102 INFO L274 CegarLoopResult]: For program point L459(line 459) no Hoare annotation was computed. [2020-11-28 07:36:13,102 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:36:13,102 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:36:13,102 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:36:13,102 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:36:13,102 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:36:13,102 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:36:13,103 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse6 (= ~a20~0 1))) (let ((.cse5 (= ~a21~0 1)) (.cse3 (not (= ~a7~0 1))) (.cse2 (= ~a17~0 1)) (.cse10 (<= ~a16~0 4)) (.cse1 (<= ~a21~0 0)) (.cse9 (= ~a16~0 6)) (.cse8 (<= 15 ~a8~0)) (.cse7 (<= 14 ~a8~0)) (.cse0 (<= ~a16~0 5)) (.cse4 (not .cse6))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse4) (and .cse5 .cse6 .cse3 .cse2) (and .cse7 (or (and .cse5 .cse0) (and .cse5 .cse6 .cse8))) (and .cse9 .cse1 .cse6) (and .cse5 .cse10 .cse3) (and .cse10 .cse6 .cse2) (and .cse10 .cse1 .cse6) (and .cse9 .cse4 .cse8) (and .cse7 .cse0 .cse4)))) [2020-11-28 07:36:13,103 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:36:13,103 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:36:13,103 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:36:13,103 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:36:13,103 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:36:13,103 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:36:13,103 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:36:13,103 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:36:13,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:36:13 BoogieIcfgContainer [2020-11-28 07:36:13,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:36:13,153 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:36:13,153 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:36:13,153 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:36:13,154 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:35:59" (3/4) ... [2020-11-28 07:36:13,157 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:36:13,189 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-11-28 07:36:13,191 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-28 07:36:13,193 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:36:13,195 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-28 07:36:13,439 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6d3ab202-51f8-4547-966f-530b108fb06d/bin/utaipan/witness.graphml [2020-11-28 07:36:13,440 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:36:13,441 INFO L168 Benchmark]: Toolchain (without parser) took 17443.07 ms. Allocated memory was 88.1 MB in the beginning and 343.9 MB in the end (delta: 255.9 MB). Free memory was 54.1 MB in the beginning and 159.6 MB in the end (delta: -105.5 MB). Peak memory consumption was 151.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:13,441 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 88.1 MB. Free memory was 62.4 MB in the beginning and 62.4 MB in the end (delta: 28.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:36:13,442 INFO L168 Benchmark]: CACSL2BoogieTranslator took 666.34 ms. Allocated memory is still 88.1 MB. Free memory was 53.9 MB in the beginning and 49.2 MB in the end (delta: 4.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:13,442 INFO L168 Benchmark]: Boogie Procedure Inliner took 102.53 ms. Allocated memory is still 88.1 MB. Free memory was 49.2 MB in the beginning and 43.6 MB in the end (delta: 5.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:13,443 INFO L168 Benchmark]: Boogie Preprocessor took 65.81 ms. Allocated memory is still 88.1 MB. Free memory was 43.3 MB in the beginning and 39.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:13,444 INFO L168 Benchmark]: RCFGBuilder took 2723.92 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 38.7 MB in the beginning and 62.3 MB in the end (delta: -23.5 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:13,444 INFO L168 Benchmark]: TraceAbstraction took 13581.18 ms. Allocated memory was 130.0 MB in the beginning and 343.9 MB in the end (delta: 213.9 MB). Free memory was 62.3 MB in the beginning and 175.3 MB in the end (delta: -113.0 MB). Peak memory consumption was 100.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:13,445 INFO L168 Benchmark]: Witness Printer took 286.92 ms. Allocated memory is still 343.9 MB. Free memory was 175.3 MB in the beginning and 159.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:13,448 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 88.1 MB. Free memory was 62.4 MB in the beginning and 62.4 MB in the end (delta: 28.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 666.34 ms. Allocated memory is still 88.1 MB. Free memory was 53.9 MB in the beginning and 49.2 MB in the end (delta: 4.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 102.53 ms. Allocated memory is still 88.1 MB. Free memory was 49.2 MB in the beginning and 43.6 MB in the end (delta: 5.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.81 ms. Allocated memory is still 88.1 MB. Free memory was 43.3 MB in the beginning and 39.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2723.92 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 38.7 MB in the beginning and 62.3 MB in the end (delta: -23.5 MB). Peak memory consumption was 25.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13581.18 ms. Allocated memory was 130.0 MB in the beginning and 343.9 MB in the end (delta: 213.9 MB). Free memory was 62.3 MB in the beginning and 175.3 MB in the end (delta: -113.0 MB). Peak memory consumption was 100.7 MB. Max. memory is 16.1 GB. * Witness Printer took 286.92 ms. Allocated memory is still 343.9 MB. Free memory was 175.3 MB in the beginning and 159.6 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: ((((((((((a16 <= 5 && a21 <= 0) && a17 == 1) || ((a16 <= 5 && !(a7 == 1)) && !(a20 == 1))) || (((a21 == 1 && a20 == 1) && !(a7 == 1)) && a17 == 1)) || (14 <= a8 && ((a21 == 1 && a16 <= 5) || ((a21 == 1 && a20 == 1) && 15 <= a8)))) || ((a16 == 6 && a21 <= 0) && a20 == 1)) || ((a21 == 1 && a16 <= 4) && !(a7 == 1))) || ((a16 <= 4 && a20 == 1) && a17 == 1)) || ((a16 <= 4 && a21 <= 0) && a20 == 1)) || ((a16 == 6 && !(a20 == 1)) && 15 <= a8)) || ((14 <= a8 && a16 <= 5) && !(a20 == 1)) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a16 <= 5 && a21 <= 0) && a17 == 1) || ((a16 <= 5 && !(a7 == 1)) && !(a20 == 1))) || (((a21 == 1 && a20 == 1) && !(a7 == 1)) && a17 == 1)) || (14 <= a8 && ((a21 == 1 && a16 <= 5) || ((a21 == 1 && a20 == 1) && 15 <= a8)))) || ((a16 == 6 && a21 <= 0) && a20 == 1)) || ((a21 == 1 && a16 <= 4) && !(a7 == 1))) || ((a16 <= 4 && a20 == 1) && a17 == 1)) || ((a16 <= 4 && a21 <= 0) && a20 == 1)) || ((a16 == 6 && !(a20 == 1)) && 15 <= a8)) || ((14 <= a8 && a16 <= 5) && !(a20 == 1)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.3s, OverallIterations: 12, TraceHistogramMax: 8, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 594 SDtfs, 983 SDslu, 56 SDs, 0 SdLazy, 2808 SolverSat, 724 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1105 GetRequests, 1079 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1210occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 12 MinimizatonAttempts, 742 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 245 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2630 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 598 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 2505 NumberOfCodeBlocks, 2505 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 3024 ConstructedInterpolants, 0 QuantifiedInterpolants, 2019406 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1067 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 16 InterpolantComputations, 14 PerfectInterpolantSequences, 4053/4315 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...