./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label02.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/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 62866bd9334bc9e66fef5c8a3ab686f8cd6aa0c9 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 10:59:32,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:59:32,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:59:32,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:59:32,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:59:32,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:59:32,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:59:32,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:59:32,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:59:32,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:59:32,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:59:32,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:59:32,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:59:32,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:59:32,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:59:32,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:59:32,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:59:32,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:59:32,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:59:32,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:59:32,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:59:32,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:59:32,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:59:32,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:59:32,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:59:32,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:59:32,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:59:32,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:59:32,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:59:32,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:59:32,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:59:32,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:59:32,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:59:32,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:59:32,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:59:32,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:59:32,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:59:32,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:59:32,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:59:32,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:59:32,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:59:32,719 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 10:59:32,736 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:59:32,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:59:32,737 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:59:32,737 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:59:32,737 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:59:32,737 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:59:32,738 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 10:59:32,738 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:59:32,738 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:59:32,738 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 10:59:32,738 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 10:59:32,738 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:59:32,738 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 10:59:32,738 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 10:59:32,739 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 10:59:32,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:59:32,739 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:59:32,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 10:59:32,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:59:32,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:59:32,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 10:59:32,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:59:32,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 10:59:32,740 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:59:32,740 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:59:32,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 10:59:32,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:59:32,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 10:59:32,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:59:32,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:59:32,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:59:32,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:59:32,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:59:32,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 10:59:32,741 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 10:59:32,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 10:59:32,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 10:59:32,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:59:32,742 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:59:32,742 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_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62866bd9334bc9e66fef5c8a3ab686f8cd6aa0c9 [2020-12-09 10:59:32,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:59:32,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:59:32,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:59:32,965 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:59:32,965 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:59:32,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label02.c [2020-12-09 10:59:33,006 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/data/dd1e79305/21a8837562b94f73952200738fa769fd/FLAG9b88da404 [2020-12-09 10:59:33,456 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:59:33,456 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/sv-benchmarks/c/eca-rers2012/Problem01_label02.c [2020-12-09 10:59:33,465 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/data/dd1e79305/21a8837562b94f73952200738fa769fd/FLAG9b88da404 [2020-12-09 10:59:33,478 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/data/dd1e79305/21a8837562b94f73952200738fa769fd [2020-12-09 10:59:33,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:59:33,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:59:33,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:59:33,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:59:33,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:59:33,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:59:33" (1/1) ... [2020-12-09 10:59:33,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b86a53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:59:33, skipping insertion in model container [2020-12-09 10:59:33,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:59:33" (1/1) ... [2020-12-09 10:59:33,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:59:33,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:59:33,735 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/sv-benchmarks/c/eca-rers2012/Problem01_label02.c[16747,16760] [2020-12-09 10:59:33,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:59:33,765 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:59:33,811 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/sv-benchmarks/c/eca-rers2012/Problem01_label02.c[16747,16760] [2020-12-09 10:59:33,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:59:33,833 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:59:33,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:59:33 WrapperNode [2020-12-09 10:59:33,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:59:33,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:59:33,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:59:33,834 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:59:33,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:59:33" (1/1) ... [2020-12-09 10:59:33,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:59:33" (1/1) ... [2020-12-09 10:59:33,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:59:33,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:59:33,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:59:33,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:59:33,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:59:33" (1/1) ... [2020-12-09 10:59:33,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:59:33" (1/1) ... [2020-12-09 10:59:33,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:59:33" (1/1) ... [2020-12-09 10:59:33,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:59:33" (1/1) ... [2020-12-09 10:59:33,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:59:33" (1/1) ... [2020-12-09 10:59:33,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:59:33" (1/1) ... [2020-12-09 10:59:33,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:59:33" (1/1) ... [2020-12-09 10:59:33,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:59:33,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:59:33,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:59:33,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:59:33,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:59:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:59:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 10:59:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:59:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:59:33,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:59:35,207 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:59:35,207 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 10:59:35,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:59:35 BoogieIcfgContainer [2020-12-09 10:59:35,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:59:35,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:59:35,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:59:35,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:59:35,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:59:33" (1/3) ... [2020-12-09 10:59:35,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52729122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:59:35, skipping insertion in model container [2020-12-09 10:59:35,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:59:33" (2/3) ... [2020-12-09 10:59:35,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52729122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:59:35, skipping insertion in model container [2020-12-09 10:59:35,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:59:35" (3/3) ... [2020-12-09 10:59:35,214 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label02.c [2020-12-09 10:59:35,224 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:59:35,227 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 10:59:35,238 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 10:59:35,260 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:59:35,261 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 10:59:35,261 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:59:35,261 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:59:35,261 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:59:35,261 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:59:35,261 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:59:35,261 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:59:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-12-09 10:59:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-09 10:59:35,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:35,283 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] [2020-12-09 10:59:35,284 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:35,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:35,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1806914648, now seen corresponding path program 1 times [2020-12-09 10:59:35,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:35,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172681837] [2020-12-09 10:59:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:59:35,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172681837] [2020-12-09 10:59:35,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:35,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:59:35,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214217137] [2020-12-09 10:59:35,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:35,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:35,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:35,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:35,548 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-12-09 10:59:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:35,874 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-12-09 10:59:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:35,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-09 10:59:35,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:35,887 INFO L225 Difference]: With dead ends: 224 [2020-12-09 10:59:35,887 INFO L226 Difference]: Without dead ends: 145 [2020-12-09 10:59:35,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-09 10:59:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-12-09 10:59:35,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-09 10:59:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-12-09 10:59:35,930 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-12-09 10:59:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:35,931 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-12-09 10:59:35,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:35,931 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-12-09 10:59:35,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-09 10:59:35,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:35,934 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] [2020-12-09 10:59:35,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 10:59:35,935 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:35,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:35,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1034859141, now seen corresponding path program 1 times [2020-12-09 10:59:35,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:35,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884677825] [2020-12-09 10:59:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:59:35,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884677825] [2020-12-09 10:59:35,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:35,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:59:35,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171781144] [2020-12-09 10:59:35,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:35,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:35,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:35,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:35,990 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-12-09 10:59:36,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:36,253 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-12-09 10:59:36,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:36,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-09 10:59:36,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:36,256 INFO L225 Difference]: With dead ends: 431 [2020-12-09 10:59:36,256 INFO L226 Difference]: Without dead ends: 287 [2020-12-09 10:59:36,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:36,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-09 10:59:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-12-09 10:59:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-09 10:59:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2020-12-09 10:59:36,276 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2020-12-09 10:59:36,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:36,277 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2020-12-09 10:59:36,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2020-12-09 10:59:36,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-09 10:59:36,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:36,279 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:36,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 10:59:36,280 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:36,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1703779783, now seen corresponding path program 1 times [2020-12-09 10:59:36,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:36,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433140474] [2020-12-09 10:59:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 10:59:36,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433140474] [2020-12-09 10:59:36,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:36,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:59:36,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191995771] [2020-12-09 10:59:36,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:36,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:36,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:36,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:36,358 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 3 states. [2020-12-09 10:59:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:36,637 INFO L93 Difference]: Finished difference Result 857 states and 1401 transitions. [2020-12-09 10:59:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:36,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-09 10:59:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:36,640 INFO L225 Difference]: With dead ends: 857 [2020-12-09 10:59:36,640 INFO L226 Difference]: Without dead ends: 571 [2020-12-09 10:59:36,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:36,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-12-09 10:59:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-12-09 10:59:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-12-09 10:59:36,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 884 transitions. [2020-12-09 10:59:36,662 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 884 transitions. Word has length 78 [2020-12-09 10:59:36,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:36,662 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 884 transitions. [2020-12-09 10:59:36,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:36,662 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 884 transitions. [2020-12-09 10:59:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-09 10:59:36,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:36,666 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:36,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 10:59:36,666 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:36,666 INFO L82 PathProgramCache]: Analyzing trace with hash 289047691, now seen corresponding path program 1 times [2020-12-09 10:59:36,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:36,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721859935] [2020-12-09 10:59:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-09 10:59:36,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721859935] [2020-12-09 10:59:36,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:36,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:59:36,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546845044] [2020-12-09 10:59:36,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:36,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:36,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:36,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:36,714 INFO L87 Difference]: Start difference. First operand 571 states and 884 transitions. Second operand 3 states. [2020-12-09 10:59:36,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:36,991 INFO L93 Difference]: Finished difference Result 1567 states and 2441 transitions. [2020-12-09 10:59:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:36,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-09 10:59:36,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:36,996 INFO L225 Difference]: With dead ends: 1567 [2020-12-09 10:59:36,997 INFO L226 Difference]: Without dead ends: 997 [2020-12-09 10:59:36,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:37,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-12-09 10:59:37,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 713. [2020-12-09 10:59:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-12-09 10:59:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1045 transitions. [2020-12-09 10:59:37,022 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1045 transitions. Word has length 91 [2020-12-09 10:59:37,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:37,022 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1045 transitions. [2020-12-09 10:59:37,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:37,022 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1045 transitions. [2020-12-09 10:59:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-09 10:59:37,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:37,024 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:37,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 10:59:37,024 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1324169875, now seen corresponding path program 1 times [2020-12-09 10:59:37,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:37,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121931942] [2020-12-09 10:59:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:59:37,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121931942] [2020-12-09 10:59:37,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:37,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:59:37,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319518447] [2020-12-09 10:59:37,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:37,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:37,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:37,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:37,079 INFO L87 Difference]: Start difference. First operand 713 states and 1045 transitions. Second operand 3 states. [2020-12-09 10:59:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:37,360 INFO L93 Difference]: Finished difference Result 2135 states and 3132 transitions. [2020-12-09 10:59:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:37,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-09 10:59:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:37,366 INFO L225 Difference]: With dead ends: 2135 [2020-12-09 10:59:37,366 INFO L226 Difference]: Without dead ends: 1423 [2020-12-09 10:59:37,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:37,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-12-09 10:59:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1281. [2020-12-09 10:59:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-12-09 10:59:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1796 transitions. [2020-12-09 10:59:37,391 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1796 transitions. Word has length 94 [2020-12-09 10:59:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:37,391 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1796 transitions. [2020-12-09 10:59:37,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1796 transitions. [2020-12-09 10:59:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-09 10:59:37,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:37,393 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] [2020-12-09 10:59:37,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 10:59:37,394 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:37,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1729121258, now seen corresponding path program 1 times [2020-12-09 10:59:37,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:37,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085801348] [2020-12-09 10:59:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:59:37,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085801348] [2020-12-09 10:59:37,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:37,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:59:37,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77229974] [2020-12-09 10:59:37,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:59:37,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:37,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:59:37,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:59:37,456 INFO L87 Difference]: Start difference. First operand 1281 states and 1796 transitions. Second operand 4 states. [2020-12-09 10:59:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:37,848 INFO L93 Difference]: Finished difference Result 2845 states and 3918 transitions. [2020-12-09 10:59:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:59:37,849 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-12-09 10:59:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:37,856 INFO L225 Difference]: With dead ends: 2845 [2020-12-09 10:59:37,856 INFO L226 Difference]: Without dead ends: 1636 [2020-12-09 10:59:37,858 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 [2020-12-09 10:59:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2020-12-09 10:59:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1423. [2020-12-09 10:59:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1423 states. [2020-12-09 10:59:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 1945 transitions. [2020-12-09 10:59:37,880 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 1945 transitions. Word has length 97 [2020-12-09 10:59:37,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:37,881 INFO L481 AbstractCegarLoop]: Abstraction has 1423 states and 1945 transitions. [2020-12-09 10:59:37,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:59:37,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 1945 transitions. [2020-12-09 10:59:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-09 10:59:37,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:37,884 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:37,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 10:59:37,885 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash -720012663, now seen corresponding path program 1 times [2020-12-09 10:59:37,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:37,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205912295] [2020-12-09 10:59:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-09 10:59:37,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205912295] [2020-12-09 10:59:37,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:37,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:59:37,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820454565] [2020-12-09 10:59:37,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:37,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:37,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:37,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:37,929 INFO L87 Difference]: Start difference. First operand 1423 states and 1945 transitions. Second operand 3 states. [2020-12-09 10:59:38,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:38,186 INFO L93 Difference]: Finished difference Result 2916 states and 3960 transitions. [2020-12-09 10:59:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:38,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2020-12-09 10:59:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:38,191 INFO L225 Difference]: With dead ends: 2916 [2020-12-09 10:59:38,192 INFO L226 Difference]: Without dead ends: 1423 [2020-12-09 10:59:38,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:38,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-12-09 10:59:38,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1423. [2020-12-09 10:59:38,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1423 states. [2020-12-09 10:59:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 1726 transitions. [2020-12-09 10:59:38,214 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 1726 transitions. Word has length 98 [2020-12-09 10:59:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:38,214 INFO L481 AbstractCegarLoop]: Abstraction has 1423 states and 1726 transitions. [2020-12-09 10:59:38,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:38,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 1726 transitions. [2020-12-09 10:59:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-09 10:59:38,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:38,217 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:38,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 10:59:38,217 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1815696943, now seen corresponding path program 1 times [2020-12-09 10:59:38,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:38,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205993700] [2020-12-09 10:59:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 10:59:38,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205993700] [2020-12-09 10:59:38,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:38,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:59:38,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850496993] [2020-12-09 10:59:38,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:38,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:38,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:38,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:38,253 INFO L87 Difference]: Start difference. First operand 1423 states and 1726 transitions. Second operand 3 states. [2020-12-09 10:59:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:38,460 INFO L93 Difference]: Finished difference Result 2774 states and 3373 transitions. [2020-12-09 10:59:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:38,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 102 [2020-12-09 10:59:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:38,465 INFO L225 Difference]: With dead ends: 2774 [2020-12-09 10:59:38,465 INFO L226 Difference]: Without dead ends: 1423 [2020-12-09 10:59:38,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:38,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-12-09 10:59:38,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1423. [2020-12-09 10:59:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1423 states. [2020-12-09 10:59:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 1683 transitions. [2020-12-09 10:59:38,486 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 1683 transitions. Word has length 102 [2020-12-09 10:59:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:38,486 INFO L481 AbstractCegarLoop]: Abstraction has 1423 states and 1683 transitions. [2020-12-09 10:59:38,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:38,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 1683 transitions. [2020-12-09 10:59:38,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-09 10:59:38,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:38,488 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:38,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 10:59:38,488 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:38,489 INFO L82 PathProgramCache]: Analyzing trace with hash -785769931, now seen corresponding path program 1 times [2020-12-09 10:59:38,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:38,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815969731] [2020-12-09 10:59:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-09 10:59:38,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815969731] [2020-12-09 10:59:38,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:38,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:59:38,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777676336] [2020-12-09 10:59:38,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:38,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:38,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:38,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:38,519 INFO L87 Difference]: Start difference. First operand 1423 states and 1683 transitions. Second operand 3 states. [2020-12-09 10:59:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:38,763 INFO L93 Difference]: Finished difference Result 3200 states and 3823 transitions. [2020-12-09 10:59:38,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:38,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-12-09 10:59:38,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:38,770 INFO L225 Difference]: With dead ends: 3200 [2020-12-09 10:59:38,770 INFO L226 Difference]: Without dead ends: 1849 [2020-12-09 10:59:38,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:38,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2020-12-09 10:59:38,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1707. [2020-12-09 10:59:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2020-12-09 10:59:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2056 transitions. [2020-12-09 10:59:38,795 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2056 transitions. Word has length 111 [2020-12-09 10:59:38,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:38,795 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 2056 transitions. [2020-12-09 10:59:38,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2056 transitions. [2020-12-09 10:59:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-09 10:59:38,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:38,798 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:38,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 10:59:38,798 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:38,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:38,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1033354257, now seen corresponding path program 1 times [2020-12-09 10:59:38,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:38,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148296566] [2020-12-09 10:59:38,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-09 10:59:38,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148296566] [2020-12-09 10:59:38,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:38,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 10:59:38,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472272600] [2020-12-09 10:59:38,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:38,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:38,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:38,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:38,841 INFO L87 Difference]: Start difference. First operand 1707 states and 2056 transitions. Second operand 3 states. [2020-12-09 10:59:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:39,042 INFO L93 Difference]: Finished difference Result 3342 states and 4033 transitions. [2020-12-09 10:59:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:39,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-12-09 10:59:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:39,048 INFO L225 Difference]: With dead ends: 3342 [2020-12-09 10:59:39,049 INFO L226 Difference]: Without dead ends: 1707 [2020-12-09 10:59:39,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-12-09 10:59:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1707. [2020-12-09 10:59:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2020-12-09 10:59:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2046 transitions. [2020-12-09 10:59:39,077 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2046 transitions. Word has length 127 [2020-12-09 10:59:39,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:39,077 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 2046 transitions. [2020-12-09 10:59:39,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2046 transitions. [2020-12-09 10:59:39,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-09 10:59:39,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:39,080 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-12-09 10:59:39,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 10:59:39,081 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:39,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1365883303, now seen corresponding path program 1 times [2020-12-09 10:59:39,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:39,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862051798] [2020-12-09 10:59:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-09 10:59:39,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862051798] [2020-12-09 10:59:39,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:39,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:59:39,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298066994] [2020-12-09 10:59:39,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:59:39,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:39,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:59:39,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:59:39,142 INFO L87 Difference]: Start difference. First operand 1707 states and 2046 transitions. Second operand 4 states. [2020-12-09 10:59:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:39,432 INFO L93 Difference]: Finished difference Result 3342 states and 4017 transitions. [2020-12-09 10:59:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:59:39,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-12-09 10:59:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:39,439 INFO L225 Difference]: With dead ends: 3342 [2020-12-09 10:59:39,439 INFO L226 Difference]: Without dead ends: 1707 [2020-12-09 10:59:39,440 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 [2020-12-09 10:59:39,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-12-09 10:59:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1707. [2020-12-09 10:59:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2020-12-09 10:59:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2026 transitions. [2020-12-09 10:59:39,471 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2026 transitions. Word has length 131 [2020-12-09 10:59:39,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:39,471 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 2026 transitions. [2020-12-09 10:59:39,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:59:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2026 transitions. [2020-12-09 10:59:39,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-09 10:59:39,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:39,475 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:39,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 10:59:39,475 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:39,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:39,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1083768190, now seen corresponding path program 1 times [2020-12-09 10:59:39,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:39,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996892627] [2020-12-09 10:59:39,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 96 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-09 10:59:39,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996892627] [2020-12-09 10:59:39,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644750577] [2020-12-09 10:59:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:59:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:39,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 10:59:39,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:59:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-09 10:59:39,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:59:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-09 10:59:39,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 10:59:39,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-12-09 10:59:39,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491949603] [2020-12-09 10:59:39,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:39,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:39,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:39,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:59:39,884 INFO L87 Difference]: Start difference. First operand 1707 states and 2026 transitions. Second operand 3 states. [2020-12-09 10:59:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:40,085 INFO L93 Difference]: Finished difference Result 3342 states and 3977 transitions. [2020-12-09 10:59:40,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:40,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-12-09 10:59:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:40,091 INFO L225 Difference]: With dead ends: 3342 [2020-12-09 10:59:40,091 INFO L226 Difference]: Without dead ends: 1707 [2020-12-09 10:59:40,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:59:40,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-12-09 10:59:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1707. [2020-12-09 10:59:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2020-12-09 10:59:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2000 transitions. [2020-12-09 10:59:40,112 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2000 transitions. Word has length 148 [2020-12-09 10:59:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:40,112 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 2000 transitions. [2020-12-09 10:59:40,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2000 transitions. [2020-12-09 10:59:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-09 10:59:40,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:40,115 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:40,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-09 10:59:40,316 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2126449258, now seen corresponding path program 1 times [2020-12-09 10:59:40,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:40,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402570612] [2020-12-09 10:59:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 101 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-09 10:59:40,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402570612] [2020-12-09 10:59:40,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988765102] [2020-12-09 10:59:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:59:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:40,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 10:59:40,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:59:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-09 10:59:40,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:59:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-09 10:59:40,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 10:59:40,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-12-09 10:59:40,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001596134] [2020-12-09 10:59:40,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:40,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:40,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:40,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:59:40,803 INFO L87 Difference]: Start difference. First operand 1707 states and 2000 transitions. Second operand 3 states. [2020-12-09 10:59:41,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:41,003 INFO L93 Difference]: Finished difference Result 3342 states and 3925 transitions. [2020-12-09 10:59:41,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:41,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2020-12-09 10:59:41,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:41,009 INFO L225 Difference]: With dead ends: 3342 [2020-12-09 10:59:41,009 INFO L226 Difference]: Without dead ends: 1707 [2020-12-09 10:59:41,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:59:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-12-09 10:59:41,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1636. [2020-12-09 10:59:41,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-12-09 10:59:41,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1856 transitions. [2020-12-09 10:59:41,033 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1856 transitions. Word has length 153 [2020-12-09 10:59:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:41,034 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1856 transitions. [2020-12-09 10:59:41,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:41,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1856 transitions. [2020-12-09 10:59:41,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-09 10:59:41,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:41,037 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:41,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-09 10:59:41,239 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:41,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1993123444, now seen corresponding path program 1 times [2020-12-09 10:59:41,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:41,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051792965] [2020-12-09 10:59:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 105 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-09 10:59:41,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051792965] [2020-12-09 10:59:41,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636670626] [2020-12-09 10:59:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:59:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:41,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 10:59:41,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:59:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-09 10:59:41,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:59:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-09 10:59:41,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 10:59:41,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-12-09 10:59:41,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294155191] [2020-12-09 10:59:41,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:41,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:41,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:41,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:59:41,640 INFO L87 Difference]: Start difference. First operand 1636 states and 1856 transitions. Second operand 3 states. [2020-12-09 10:59:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:41,843 INFO L93 Difference]: Finished difference Result 1922 states and 2190 transitions. [2020-12-09 10:59:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:41,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2020-12-09 10:59:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:41,849 INFO L225 Difference]: With dead ends: 1922 [2020-12-09 10:59:41,849 INFO L226 Difference]: Without dead ends: 1920 [2020-12-09 10:59:41,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:59:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2020-12-09 10:59:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1778. [2020-12-09 10:59:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1778 states. [2020-12-09 10:59:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2028 transitions. [2020-12-09 10:59:41,871 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2028 transitions. Word has length 157 [2020-12-09 10:59:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:41,871 INFO L481 AbstractCegarLoop]: Abstraction has 1778 states and 2028 transitions. [2020-12-09 10:59:41,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2028 transitions. [2020-12-09 10:59:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-09 10:59:41,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:41,874 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:42,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-09 10:59:42,076 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash 878013139, now seen corresponding path program 1 times [2020-12-09 10:59:42,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:42,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864195595] [2020-12-09 10:59:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 168 proven. 11 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-12-09 10:59:42,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864195595] [2020-12-09 10:59:42,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363102172] [2020-12-09 10:59:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:59:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:42,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 10:59:42,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:59:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-12-09 10:59:42,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:59:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-12-09 10:59:42,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 10:59:42,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2020-12-09 10:59:42,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847661325] [2020-12-09 10:59:42,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:42,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:42,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:42,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:59:42,451 INFO L87 Difference]: Start difference. First operand 1778 states and 2028 transitions. Second operand 3 states. [2020-12-09 10:59:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:42,654 INFO L93 Difference]: Finished difference Result 3555 states and 4056 transitions. [2020-12-09 10:59:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:42,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2020-12-09 10:59:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:42,660 INFO L225 Difference]: With dead ends: 3555 [2020-12-09 10:59:42,660 INFO L226 Difference]: Without dead ends: 1849 [2020-12-09 10:59:42,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 382 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:59:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2020-12-09 10:59:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1565. [2020-12-09 10:59:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2020-12-09 10:59:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1744 transitions. [2020-12-09 10:59:42,678 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1744 transitions. Word has length 192 [2020-12-09 10:59:42,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:42,679 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 1744 transitions. [2020-12-09 10:59:42,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:42,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1744 transitions. [2020-12-09 10:59:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-09 10:59:42,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:42,681 INFO L422 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:42,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:59:42,882 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:42,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:42,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2018013817, now seen corresponding path program 1 times [2020-12-09 10:59:42,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:42,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796188489] [2020-12-09 10:59:42,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-12-09 10:59:42,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796188489] [2020-12-09 10:59:42,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:42,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:59:42,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60647857] [2020-12-09 10:59:42,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:59:42,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:42,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:59:42,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:59:42,992 INFO L87 Difference]: Start difference. First operand 1565 states and 1744 transitions. Second operand 4 states. [2020-12-09 10:59:43,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:43,229 INFO L93 Difference]: Finished difference Result 3271 states and 3650 transitions. [2020-12-09 10:59:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:59:43,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 210 [2020-12-09 10:59:43,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:43,235 INFO L225 Difference]: With dead ends: 3271 [2020-12-09 10:59:43,235 INFO L226 Difference]: Without dead ends: 1636 [2020-12-09 10:59:43,236 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 [2020-12-09 10:59:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2020-12-09 10:59:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1494. [2020-12-09 10:59:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-12-09 10:59:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1633 transitions. [2020-12-09 10:59:43,251 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1633 transitions. Word has length 210 [2020-12-09 10:59:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:43,251 INFO L481 AbstractCegarLoop]: Abstraction has 1494 states and 1633 transitions. [2020-12-09 10:59:43,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:59:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1633 transitions. [2020-12-09 10:59:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-12-09 10:59:43,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:43,253 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:43,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-09 10:59:43,253 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:43,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:43,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1501176846, now seen corresponding path program 1 times [2020-12-09 10:59:43,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:43,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890426285] [2020-12-09 10:59:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2020-12-09 10:59:43,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890426285] [2020-12-09 10:59:43,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:43,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:59:43,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063957214] [2020-12-09 10:59:43,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:43,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:43,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:43,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:43,356 INFO L87 Difference]: Start difference. First operand 1494 states and 1633 transitions. Second operand 3 states. [2020-12-09 10:59:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:43,528 INFO L93 Difference]: Finished difference Result 3342 states and 3665 transitions. [2020-12-09 10:59:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:43,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 275 [2020-12-09 10:59:43,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:43,533 INFO L225 Difference]: With dead ends: 3342 [2020-12-09 10:59:43,533 INFO L226 Difference]: Without dead ends: 1494 [2020-12-09 10:59:43,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-12-09 10:59:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1494. [2020-12-09 10:59:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1494 states. [2020-12-09 10:59:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 1614 transitions. [2020-12-09 10:59:43,549 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 1614 transitions. Word has length 275 [2020-12-09 10:59:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:43,550 INFO L481 AbstractCegarLoop]: Abstraction has 1494 states and 1614 transitions. [2020-12-09 10:59:43,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 1614 transitions. [2020-12-09 10:59:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-12-09 10:59:43,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:59:43,552 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 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, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:59:43,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-09 10:59:43,552 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:59:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:59:43,552 INFO L82 PathProgramCache]: Analyzing trace with hash -2062653587, now seen corresponding path program 1 times [2020-12-09 10:59:43,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:59:43,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137251169] [2020-12-09 10:59:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:59:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:59:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2020-12-09 10:59:43,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137251169] [2020-12-09 10:59:43,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:59:43,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 10:59:43,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658623373] [2020-12-09 10:59:43,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 10:59:43,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:59:43,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 10:59:43,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:43,655 INFO L87 Difference]: Start difference. First operand 1494 states and 1614 transitions. Second operand 3 states. [2020-12-09 10:59:43,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:59:43,817 INFO L93 Difference]: Finished difference Result 2488 states and 2702 transitions. [2020-12-09 10:59:43,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 10:59:43,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 287 [2020-12-09 10:59:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:59:43,818 INFO L225 Difference]: With dead ends: 2488 [2020-12-09 10:59:43,818 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 10:59:43,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 10:59:43,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 10:59:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 10:59:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 10:59:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 10:59:43,820 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 287 [2020-12-09 10:59:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:59:43,820 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 10:59:43,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 10:59:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 10:59:43,820 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 10:59:43,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-09 10:59:43,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 10:59:44,130 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-09 10:59:44,348 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-09 10:59:44,351 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-12-09 10:59:44,351 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-12-09 10:59:44,351 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-12-09 10:59:44,351 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-12-09 10:59:44,351 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-12-09 10:59:44,351 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-12-09 10:59:44,351 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-12-09 10:59:44,351 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-12-09 10:59:44,351 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-12-09 10:59:44,351 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-12-09 10:59:44,351 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-12-09 10:59:44,351 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-12-09 10:59:44,352 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-12-09 10:59:44,352 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-12-09 10:59:44,352 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-12-09 10:59:44,352 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-12-09 10:59:44,352 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-12-09 10:59:44,352 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-12-09 10:59:44,352 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-12-09 10:59:44,352 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-12-09 10:59:44,352 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-12-09 10:59:44,352 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-12-09 10:59:44,353 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-12-09 10:59:44,353 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-12-09 10:59:44,353 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-12-09 10:59:44,353 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-12-09 10:59:44,353 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-12-09 10:59:44,353 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-12-09 10:59:44,353 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-12-09 10:59:44,353 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-12-09 10:59:44,353 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-12-09 10:59:44,353 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-12-09 10:59:44,354 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-12-09 10:59:44,354 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-12-09 10:59:44,354 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-12-09 10:59:44,354 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-12-09 10:59:44,354 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 10:59:44,354 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-12-09 10:59:44,354 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-12-09 10:59:44,354 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-12-09 10:59:44,355 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse1 (<= ~a16~0 4)) (.cse6 (<= ~a21~0 0)) (.cse4 (= ~a20~0 1)) (.cse5 (= ~a17~0 1)) (.cse2 (<= ~a8~0 13)) (.cse8 (<= ~a7~0 0)) (.cse9 (<= ~a8~0 14)) (.cse7 (= ~a21~0 1)) (.cse0 (= ~a7~0 1)) (.cse10 (<= ~a16~0 5)) (.cse3 (<= ~a20~0 0))) (or (and .cse0 .cse1 .cse2 .cse3) (and (or (and .cse1 .cse4 .cse5 .cse2) (and .cse1 .cse6 .cse4 .cse2)) .cse0) (and .cse0 .cse6 .cse4 .cse5 .cse2) (and .cse7 .cse8 .cse4) (and .cse9 .cse7 .cse4 (<= 5 ~a16~0)) (and (<= 6 ~a16~0) .cse0 .cse4 .cse2) (and .cse7 .cse4 .cse5 .cse2) (and .cse7 .cse8 .cse3) (and .cse9 .cse7 .cse10 .cse3) (and .cse7 .cse0 .cse10 .cse3))) [2020-12-09 10:59:44,355 INFO L262 CegarLoopResult]: For program point L452-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 10:59:44,355 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-12-09 10:59:44,355 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-12-09 10:59:44,355 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-12-09 10:59:44,355 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-12-09 10:59:44,356 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-12-09 10:59:44,356 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-12-09 10:59:44,356 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-12-09 10:59:44,356 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 10:59:44,356 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-12-09 10:59:44,356 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-12-09 10:59:44,356 INFO L262 CegarLoopResult]: For program point L455-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 10:59:44,356 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-12-09 10:59:44,356 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-12-09 10:59:44,357 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-12-09 10:59:44,357 INFO L262 CegarLoopResult]: For program point L456(line 456) no Hoare annotation was computed. [2020-12-09 10:59:44,357 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-12-09 10:59:44,357 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-12-09 10:59:44,357 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-12-09 10:59:44,357 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-12-09 10:59:44,357 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-12-09 10:59:44,357 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-12-09 10:59:44,357 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-12-09 10:59:44,357 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-12-09 10:59:44,358 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-12-09 10:59:44,358 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-12-09 10:59:44,358 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse1 (<= ~a16~0 4)) (.cse6 (<= ~a21~0 0)) (.cse4 (= ~a20~0 1)) (.cse5 (= ~a17~0 1)) (.cse2 (<= ~a8~0 13)) (.cse8 (<= ~a7~0 0)) (.cse9 (<= ~a8~0 14)) (.cse7 (= ~a21~0 1)) (.cse0 (= ~a7~0 1)) (.cse10 (<= ~a16~0 5)) (.cse3 (<= ~a20~0 0))) (or (and .cse0 .cse1 .cse2 .cse3) (and (or (and .cse1 .cse4 .cse5 .cse2) (and .cse1 .cse6 .cse4 .cse2)) .cse0) (and .cse0 .cse6 .cse4 .cse5 .cse2) (and .cse7 .cse8 .cse4) (and .cse9 .cse7 .cse4 (<= 5 ~a16~0)) (and (<= 6 ~a16~0) .cse0 .cse4 .cse2) (and .cse7 .cse4 .cse5 .cse2) (and .cse7 .cse8 .cse3) (and .cse9 .cse7 .cse10 .cse3) (and .cse7 .cse0 .cse10 .cse3))) [2020-12-09 10:59:44,358 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-12-09 10:59:44,358 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 456) no Hoare annotation was computed. [2020-12-09 10:59:44,358 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-12-09 10:59:44,358 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-12-09 10:59:44,359 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-12-09 10:59:44,359 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-12-09 10:59:44,359 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-12-09 10:59:44,359 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-12-09 10:59:44,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:59:44 BoogieIcfgContainer [2020-12-09 10:59:44,376 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:59:44,376 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:59:44,376 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:59:44,377 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:59:44,377 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:59:35" (3/4) ... [2020-12-09 10:59:44,380 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 10:59:44,401 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 102 nodes and edges [2020-12-09 10:59:44,403 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-12-09 10:59:44,404 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-09 10:59:44,406 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 10:59:44,492 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9d46ed39-d3b7-4270-bd80-45f2aad40ea6/bin/utaipan/witness.graphml [2020-12-09 10:59:44,492 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:59:44,493 INFO L168 Benchmark]: Toolchain (without parser) took 11011.22 ms. Allocated memory was 107.0 MB in the beginning and 343.9 MB in the end (delta: 237.0 MB). Free memory was 65.3 MB in the beginning and 253.7 MB in the end (delta: -188.4 MB). Peak memory consumption was 51.4 MB. Max. memory is 16.1 GB. [2020-12-09 10:59:44,493 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 107.0 MB. Free memory is still 83.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:59:44,494 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.48 ms. Allocated memory is still 107.0 MB. Free memory was 65.0 MB in the beginning and 67.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2020-12-09 10:59:44,494 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.01 ms. Allocated memory is still 107.0 MB. Free memory was 67.7 MB in the beginning and 62.0 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 10:59:44,494 INFO L168 Benchmark]: Boogie Preprocessor took 43.58 ms. Allocated memory is still 107.0 MB. Free memory was 62.0 MB in the beginning and 57.3 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 10:59:44,494 INFO L168 Benchmark]: RCFGBuilder took 1279.06 ms. Allocated memory was 107.0 MB in the beginning and 136.3 MB in the end (delta: 29.4 MB). Free memory was 57.3 MB in the beginning and 84.3 MB in the end (delta: -27.0 MB). Peak memory consumption was 38.9 MB. Max. memory is 16.1 GB. [2020-12-09 10:59:44,495 INFO L168 Benchmark]: TraceAbstraction took 9166.01 ms. Allocated memory was 136.3 MB in the beginning and 343.9 MB in the end (delta: 207.6 MB). Free memory was 84.3 MB in the beginning and 269.6 MB in the end (delta: -185.3 MB). Peak memory consumption was 149.2 MB. Max. memory is 16.1 GB. [2020-12-09 10:59:44,495 INFO L168 Benchmark]: Witness Printer took 116.07 ms. Allocated memory is still 343.9 MB. Free memory was 269.6 MB in the beginning and 253.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 10:59:44,496 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 107.0 MB. Free memory is still 83.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 350.48 ms. Allocated memory is still 107.0 MB. Free memory was 65.0 MB in the beginning and 67.7 MB in the end (delta: -2.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.01 ms. Allocated memory is still 107.0 MB. Free memory was 67.7 MB in the beginning and 62.0 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.58 ms. Allocated memory is still 107.0 MB. Free memory was 62.0 MB in the beginning and 57.3 MB in the end (delta: 4.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1279.06 ms. Allocated memory was 107.0 MB in the beginning and 136.3 MB in the end (delta: 29.4 MB). Free memory was 57.3 MB in the beginning and 84.3 MB in the end (delta: -27.0 MB). Peak memory consumption was 38.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9166.01 ms. Allocated memory was 136.3 MB in the beginning and 343.9 MB in the end (delta: 207.6 MB). Free memory was 84.3 MB in the beginning and 269.6 MB in the end (delta: -185.3 MB). Peak memory consumption was 149.2 MB. Max. memory is 16.1 GB. * Witness Printer took 116.07 ms. Allocated memory is still 343.9 MB. Free memory was 269.6 MB in the beginning and 253.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 456]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((((((a7 == 1 && a16 <= 4) && a8 <= 13) && a20 <= 0) || (((((a16 <= 4 && a20 == 1) && a17 == 1) && a8 <= 13) || (((a16 <= 4 && a21 <= 0) && a20 == 1) && a8 <= 13)) && a7 == 1)) || ((((a7 == 1 && a21 <= 0) && a20 == 1) && a17 == 1) && a8 <= 13)) || ((a21 == 1 && a7 <= 0) && a20 == 1)) || (((a8 <= 14 && a21 == 1) && a20 == 1) && 5 <= a16)) || (((6 <= a16 && a7 == 1) && a20 == 1) && a8 <= 13)) || (((a21 == 1 && a20 == 1) && a17 == 1) && a8 <= 13)) || ((a21 == 1 && a7 <= 0) && a20 <= 0)) || (((a8 <= 14 && a21 == 1) && a16 <= 5) && a20 <= 0)) || (((a21 == 1 && a7 == 1) && a16 <= 5) && a20 <= 0) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((((((a7 == 1 && a16 <= 4) && a8 <= 13) && a20 <= 0) || (((((a16 <= 4 && a20 == 1) && a17 == 1) && a8 <= 13) || (((a16 <= 4 && a21 <= 0) && a20 == 1) && a8 <= 13)) && a7 == 1)) || ((((a7 == 1 && a21 <= 0) && a20 == 1) && a17 == 1) && a8 <= 13)) || ((a21 == 1 && a7 <= 0) && a20 == 1)) || (((a8 <= 14 && a21 == 1) && a20 == 1) && 5 <= a16)) || (((6 <= a16 && a7 == 1) && a20 == 1) && a8 <= 13)) || (((a21 == 1 && a20 == 1) && a17 == 1) && a8 <= 13)) || ((a21 == 1 && a7 <= 0) && a20 <= 0)) || (((a8 <= 14 && a21 == 1) && a16 <= 5) && a20 <= 0)) || (((a21 == 1 && a7 == 1) && a16 <= 5) && a20 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.5s, OverallIterations: 18, TraceHistogramMax: 8, AutomataDifference: 4.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1099 SDtfs, 1175 SDslu, 74 SDs, 0 SdLazy, 3864 SolverSat, 811 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1344 GetRequests, 1311 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1778occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 18 MinimizatonAttempts, 1420 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 55 NumberOfFragments, 293 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2326 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 446 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 3149 NumberOfCodeBlocks, 3149 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 3773 ConstructedInterpolants, 0 QuantifiedInterpolants, 1269135 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1602 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 26 InterpolantComputations, 22 PerfectInterpolantSequences, 3786/3830 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...