./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 94b61e96441ca10668b436b4ef10dfd9464f0863 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 20:25:35,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:25:35,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:25:35,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:25:35,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:25:35,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:25:35,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:25:35,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:25:35,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:25:35,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:25:35,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:25:35,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:25:35,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:25:35,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:25:35,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:25:35,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:25:35,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:25:35,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:25:35,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:25:35,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:25:35,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:25:35,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:25:35,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:25:35,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:25:35,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:25:35,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:25:35,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:25:35,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:25:35,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:25:35,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:25:35,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:25:35,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:25:35,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:25:35,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:25:35,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:25:35,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:25:35,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:25:35,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:25:35,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:25:35,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:25:35,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:25:35,108 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-09 20:25:35,126 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:25:35,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:25:35,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:25:35,127 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:25:35,127 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:25:35,127 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:25:35,127 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:25:35,127 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:25:35,127 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:25:35,127 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:25:35,127 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:25:35,128 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:25:35,128 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:25:35,128 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:25:35,128 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:25:35,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:25:35,129 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 20:25:35,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:25:35,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:25:35,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 20:25:35,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:25:35,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 20:25:35,129 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 20:25:35,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 20:25:35,130 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:25:35,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 20:25:35,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:25:35,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:25:35,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:25:35,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:25:35,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:25:35,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 20:25:35,131 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:25:35,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:25:35,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 20:25:35,131 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:25:35,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:25:35,131 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_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94b61e96441ca10668b436b4ef10dfd9464f0863 [2020-12-09 20:25:35,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:25:35,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:25:35,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:25:35,312 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:25:35,313 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:25:35,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan/../../sv-benchmarks/c/termination-crafted/NonTermination4.c [2020-12-09 20:25:35,355 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan/data/58a555215/a9ccb8ceed4e4c0dae855ccd0ca3103c/FLAGf7f048b6e [2020-12-09 20:25:35,708 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:25:35,708 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/sv-benchmarks/c/termination-crafted/NonTermination4.c [2020-12-09 20:25:35,713 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan/data/58a555215/a9ccb8ceed4e4c0dae855ccd0ca3103c/FLAGf7f048b6e [2020-12-09 20:25:35,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan/data/58a555215/a9ccb8ceed4e4c0dae855ccd0ca3103c [2020-12-09 20:25:35,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:25:35,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:25:35,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:25:35,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:25:35,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:25:35,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:25:35" (1/1) ... [2020-12-09 20:25:35,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7248e171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:25:35, skipping insertion in model container [2020-12-09 20:25:35,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:25:35" (1/1) ... [2020-12-09 20:25:35,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:25:35,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:25:35,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:25:35,853 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:25:35,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:25:35,877 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:25:35,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:25:35 WrapperNode [2020-12-09 20:25:35,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:25:35,878 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:25:35,878 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:25:35,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:25:35,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:25:35" (1/1) ... [2020-12-09 20:25:35,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:25:35" (1/1) ... [2020-12-09 20:25:35,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:25:35,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:25:35,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:25:35,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:25:35,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:25:35" (1/1) ... [2020-12-09 20:25:35,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:25:35" (1/1) ... [2020-12-09 20:25:35,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:25:35" (1/1) ... [2020-12-09 20:25:35,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:25:35" (1/1) ... [2020-12-09 20:25:35,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:25:35" (1/1) ... [2020-12-09 20:25:35,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:25:35" (1/1) ... [2020-12-09 20:25:35,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:25:35" (1/1) ... [2020-12-09 20:25:35,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:25:35,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:25:35,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:25:35,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:25:35,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:25:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/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 20:25:35,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:25:35,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:25:36,081 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:25:36,082 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 20:25:36,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:25:36 BoogieIcfgContainer [2020-12-09 20:25:36,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:25:36,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:25:36,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:25:36,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:25:36,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:25:35" (1/3) ... [2020-12-09 20:25:36,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cc9c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:25:36, skipping insertion in model container [2020-12-09 20:25:36,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:25:35" (2/3) ... [2020-12-09 20:25:36,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cc9c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:25:36, skipping insertion in model container [2020-12-09 20:25:36,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:25:36" (3/3) ... [2020-12-09 20:25:36,092 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTermination4.c [2020-12-09 20:25:36,105 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:25:36,108 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-09 20:25:36,118 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 20:25:36,141 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:25:36,141 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 20:25:36,141 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:25:36,141 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:25:36,141 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:25:36,141 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:25:36,141 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:25:36,141 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:25:36,151 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 20:25:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 20:25:36,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:25:36,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 20:25:36,156 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:25:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:25:36,162 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-12-09 20:25:36,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:25:36,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303067229] [2020-12-09 20:25:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:25:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:25:36,267 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 20:25:36,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303067229] [2020-12-09 20:25:36,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:25:36,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:25:36,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367296229] [2020-12-09 20:25:36,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:25:36,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:25:36,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:25:36,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:25:36,289 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-12-09 20:25:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:25:36,332 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-12-09 20:25:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:25:36,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 20:25:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:25:36,345 INFO L225 Difference]: With dead ends: 15 [2020-12-09 20:25:36,346 INFO L226 Difference]: Without dead ends: 13 [2020-12-09 20:25:36,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 20:25:36,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-09 20:25:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-12-09 20:25:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-09 20:25:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-09 20:25:36,378 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2020-12-09 20:25:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:25:36,379 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-09 20:25:36,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:25:36,379 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-09 20:25:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 20:25:36,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:25:36,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 20:25:36,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 20:25:36,380 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:25:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:25:36,381 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2020-12-09 20:25:36,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:25:36,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685365460] [2020-12-09 20:25:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:25:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:25:36,399 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 20:25:36,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685365460] [2020-12-09 20:25:36,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:25:36,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:25:36,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856564244] [2020-12-09 20:25:36,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:25:36,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:25:36,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:25:36,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:25:36,403 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2020-12-09 20:25:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:25:36,413 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-12-09 20:25:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:25:36,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 20:25:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:25:36,414 INFO L225 Difference]: With dead ends: 12 [2020-12-09 20:25:36,415 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 20:25:36,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 20:25:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 20:25:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 20:25:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 20:25:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-09 20:25:36,419 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2020-12-09 20:25:36,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:25:36,420 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-09 20:25:36,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:25:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-09 20:25:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 20:25:36,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:25:36,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 20:25:36,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 20:25:36,421 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:25:36,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:25:36,422 INFO L82 PathProgramCache]: Analyzing trace with hash 29862563, now seen corresponding path program 1 times [2020-12-09 20:25:36,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:25:36,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195126443] [2020-12-09 20:25:36,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:25:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:25:36,445 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 20:25:36,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195126443] [2020-12-09 20:25:36,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:25:36,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:25:36,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441930411] [2020-12-09 20:25:36,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:25:36,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:25:36,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:25:36,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:25:36,449 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 3 states. [2020-12-09 20:25:36,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:25:36,462 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-12-09 20:25:36,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:25:36,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 20:25:36,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:25:36,464 INFO L225 Difference]: With dead ends: 15 [2020-12-09 20:25:36,464 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 20:25:36,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 20:25:36,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 20:25:36,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-09 20:25:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 20:25:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-09 20:25:36,468 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 5 [2020-12-09 20:25:36,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:25:36,468 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-09 20:25:36,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:25:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-09 20:25:36,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 20:25:36,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:25:36,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 20:25:36,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 20:25:36,470 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:25:36,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:25:36,471 INFO L82 PathProgramCache]: Analyzing trace with hash 925739501, now seen corresponding path program 1 times [2020-12-09 20:25:36,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:25:36,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867926122] [2020-12-09 20:25:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:25:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:25:36,493 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 20:25:36,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867926122] [2020-12-09 20:25:36,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:25:36,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 20:25:36,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048307823] [2020-12-09 20:25:36,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 20:25:36,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:25:36,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 20:25:36,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 20:25:36,496 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2020-12-09 20:25:36,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:25:36,505 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-09 20:25:36,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 20:25:36,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 20:25:36,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:25:36,506 INFO L225 Difference]: With dead ends: 13 [2020-12-09 20:25:36,506 INFO L226 Difference]: Without dead ends: 12 [2020-12-09 20:25:36,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 20:25:36,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-09 20:25:36,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-09 20:25:36,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-09 20:25:36,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-09 20:25:36,510 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 6 [2020-12-09 20:25:36,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:25:36,510 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-09 20:25:36,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 20:25:36,511 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-09 20:25:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 20:25:36,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:25:36,511 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-09 20:25:36,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 20:25:36,512 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:25:36,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:25:36,512 INFO L82 PathProgramCache]: Analyzing trace with hash 577431471, now seen corresponding path program 1 times [2020-12-09 20:25:36,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:25:36,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736195944] [2020-12-09 20:25:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:25:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:25:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:36,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736195944] [2020-12-09 20:25:36,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239531888] [2020-12-09 20:25:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/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 20:25:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:25:36,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 20:25:36,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:25:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:36,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:25:36,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:36,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35289199] [2020-12-09 20:25:36,666 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 20:25:36,666 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:25:36,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:25:36,676 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:25:36,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:25:36,824 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:25:36,964 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:25:36,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:25:36,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-09 20:25:36,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738660175] [2020-12-09 20:25:36,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:25:36,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:25:36,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:25:36,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-09 20:25:36,966 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-12-09 20:25:36,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:25:36,994 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-09 20:25:36,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:25:36,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-09 20:25:36,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:25:36,995 INFO L225 Difference]: With dead ends: 28 [2020-12-09 20:25:36,995 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 20:25:36,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-09 20:25:36,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 20:25:36,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-12-09 20:25:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 20:25:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-09 20:25:36,999 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 8 [2020-12-09 20:25:36,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:25:36,999 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-09 20:25:36,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:25:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-09 20:25:36,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 20:25:36,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:25:36,999 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-12-09 20:25:37,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:25:37,202 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:25:37,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:25:37,204 INFO L82 PathProgramCache]: Analyzing trace with hash 860863857, now seen corresponding path program 1 times [2020-12-09 20:25:37,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:25:37,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256561912] [2020-12-09 20:25:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:25:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:25:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:37,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256561912] [2020-12-09 20:25:37,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780197981] [2020-12-09 20:25:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/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 20:25:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:25:37,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 20:25:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:25:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:37,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:25:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:37,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777409142] [2020-12-09 20:25:37,395 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 20:25:37,396 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:25:37,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:25:37,396 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:25:37,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:25:37,460 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:25:37,545 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:25:37,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:25:37,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-09 20:25:37,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601752456] [2020-12-09 20:25:37,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:25:37,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:25:37,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:25:37,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-09 20:25:37,547 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-12-09 20:25:37,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:25:37,569 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-09 20:25:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:25:37,569 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-09 20:25:37,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:25:37,570 INFO L225 Difference]: With dead ends: 28 [2020-12-09 20:25:37,570 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 20:25:37,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-09 20:25:37,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 20:25:37,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-09 20:25:37,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 20:25:37,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-09 20:25:37,573 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 10 [2020-12-09 20:25:37,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:25:37,574 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-09 20:25:37,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:25:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-09 20:25:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 20:25:37,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:25:37,574 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1] [2020-12-09 20:25:37,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-09 20:25:37,776 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:25:37,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:25:37,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1492388577, now seen corresponding path program 2 times [2020-12-09 20:25:37,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:25:37,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375181137] [2020-12-09 20:25:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:25:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:25:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:37,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375181137] [2020-12-09 20:25:37,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876838008] [2020-12-09 20:25:37,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/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 20:25:37,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-09 20:25:37,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:25:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 20:25:37,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:25:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:38,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:25:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:38,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575107354] [2020-12-09 20:25:38,100 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 20:25:38,100 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:25:38,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:25:38,100 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:25:38,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:25:38,152 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:25:38,261 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:25:38,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:25:38,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-12-09 20:25:38,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080700370] [2020-12-09 20:25:38,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 20:25:38,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:25:38,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 20:25:38,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-09 20:25:38,263 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 12 states. [2020-12-09 20:25:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:25:38,303 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-12-09 20:25:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 20:25:38,303 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-12-09 20:25:38,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:25:38,304 INFO L225 Difference]: With dead ends: 61 [2020-12-09 20:25:38,304 INFO L226 Difference]: Without dead ends: 60 [2020-12-09 20:25:38,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-09 20:25:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-09 20:25:38,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-12-09 20:25:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-09 20:25:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-12-09 20:25:38,312 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 23 [2020-12-09 20:25:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:25:38,312 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-12-09 20:25:38,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 20:25:38,312 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-12-09 20:25:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 20:25:38,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:25:38,313 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1] [2020-12-09 20:25:38,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-09 20:25:38,514 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:25:38,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:25:38,515 INFO L82 PathProgramCache]: Analyzing trace with hash -333652957, now seen corresponding path program 2 times [2020-12-09 20:25:38,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:25:38,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255755640] [2020-12-09 20:25:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:25:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:25:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:38,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255755640] [2020-12-09 20:25:38,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698382257] [2020-12-09 20:25:38,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/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 20:25:38,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-09 20:25:38,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:25:38,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 20:25:38,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:25:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:38,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:25:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:38,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1719815683] [2020-12-09 20:25:38,718 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 20:25:38,718 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:25:38,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:25:38,719 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:25:38,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:25:38,775 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:25:38,869 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:25:38,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:25:38,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-12-09 20:25:38,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042374592] [2020-12-09 20:25:38,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 20:25:38,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:25:38,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 20:25:38,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-12-09 20:25:38,871 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 12 states. [2020-12-09 20:25:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:25:38,897 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-12-09 20:25:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 20:25:38,898 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-12-09 20:25:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:25:38,898 INFO L225 Difference]: With dead ends: 58 [2020-12-09 20:25:38,898 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 20:25:38,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-12-09 20:25:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 20:25:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-09 20:25:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-09 20:25:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-09 20:25:38,903 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 25 [2020-12-09 20:25:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:25:38,903 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-09 20:25:38,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 20:25:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-09 20:25:38,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-09 20:25:38,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:25:38,905 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1] [2020-12-09 20:25:39,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:25:39,107 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:25:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:25:39,108 INFO L82 PathProgramCache]: Analyzing trace with hash -390144735, now seen corresponding path program 3 times [2020-12-09 20:25:39,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:25:39,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279194419] [2020-12-09 20:25:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:25:39,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:25:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:39,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279194419] [2020-12-09 20:25:39,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319191393] [2020-12-09 20:25:39,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:25:39,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 20:25:39,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:25:39,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 20:25:39,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:25:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:39,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:25:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:39,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1034612118] [2020-12-09 20:25:39,559 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 20:25:39,559 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:25:39,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:25:39,559 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:25:39,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:25:39,605 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:25:39,751 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:25:39,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:25:39,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-12-09 20:25:39,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452776122] [2020-12-09 20:25:39,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-09 20:25:39,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:25:39,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-09 20:25:39,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-12-09 20:25:39,754 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 24 states. [2020-12-09 20:25:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:25:39,851 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2020-12-09 20:25:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-09 20:25:39,852 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-12-09 20:25:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:25:39,853 INFO L225 Difference]: With dead ends: 127 [2020-12-09 20:25:39,853 INFO L226 Difference]: Without dead ends: 126 [2020-12-09 20:25:39,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 131 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-12-09 20:25:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-09 20:25:39,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2020-12-09 20:25:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-09 20:25:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2020-12-09 20:25:39,865 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 53 [2020-12-09 20:25:39,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:25:39,865 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2020-12-09 20:25:39,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-09 20:25:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2020-12-09 20:25:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-09 20:25:39,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:25:39,867 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1] [2020-12-09 20:25:40,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:25:40,068 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:25:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:25:40,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1266934173, now seen corresponding path program 3 times [2020-12-09 20:25:40,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:25:40,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768367075] [2020-12-09 20:25:40,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:25:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:25:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:40,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768367075] [2020-12-09 20:25:40,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275941020] [2020-12-09 20:25:40,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:25:40,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 20:25:40,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:25:40,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 20:25:40,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:25:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:40,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:25:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:25:40,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1676645226] [2020-12-09 20:25:40,566 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 20:25:40,566 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:25:40,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:25:40,566 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:25:40,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:25:40,605 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:25:40,708 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:25:40,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:25:40,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-12-09 20:25:40,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605222424] [2020-12-09 20:25:40,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-09 20:25:40,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:25:40,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-09 20:25:40,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-12-09 20:25:40,711 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 24 states. [2020-12-09 20:25:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:25:40,760 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-12-09 20:25:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 20:25:40,760 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-12-09 20:25:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:25:40,762 INFO L225 Difference]: With dead ends: 116 [2020-12-09 20:25:40,762 INFO L226 Difference]: Without dead ends: 115 [2020-12-09 20:25:40,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 138 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-12-09 20:25:40,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-09 20:25:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-12-09 20:25:40,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-09 20:25:40,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-12-09 20:25:40,771 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 55 [2020-12-09 20:25:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:25:40,776 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-12-09 20:25:40,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-09 20:25:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-12-09 20:25:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-09 20:25:40,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:25:40,777 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1] [2020-12-09 20:25:40,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:25:40,979 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 20:25:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:25:40,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1391435441, now seen corresponding path program 4 times [2020-12-09 20:25:40,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:25:40,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434578264] [2020-12-09 20:25:40,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:25:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:25:41,058 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:25:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 20:25:41,112 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 20:25:41,130 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 20:25:41,131 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 20:25:41,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2020-12-09 20:25:41,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:25:41 BoogieIcfgContainer [2020-12-09 20:25:41,154 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:25:41,155 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:25:41,155 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:25:41,155 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:25:41,155 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:25:36" (3/4) ... [2020-12-09 20:25:41,156 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 20:25:41,189 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1de91de5-cfd8-4e80-992d-c4fc0ff5afc3/bin/utaipan/witness.graphml [2020-12-09 20:25:41,189 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:25:41,191 INFO L168 Benchmark]: Toolchain (without parser) took 5463.32 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 66.4 MB in the beginning and 76.9 MB in the end (delta: -10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 20:25:41,191 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 94.4 MB. Free memory was 51.9 MB in the beginning and 51.8 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:25:41,191 INFO L168 Benchmark]: CACSL2BoogieTranslator took 149.06 ms. Allocated memory is still 94.4 MB. Free memory was 66.2 MB in the beginning and 71.1 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 20:25:41,191 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.13 ms. Allocated memory is still 94.4 MB. Free memory was 71.1 MB in the beginning and 69.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:25:41,192 INFO L168 Benchmark]: Boogie Preprocessor took 11.86 ms. Allocated memory is still 94.4 MB. Free memory was 69.9 MB in the beginning and 68.9 MB in the end (delta: 941.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:25:41,192 INFO L168 Benchmark]: RCFGBuilder took 174.28 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 58.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 20:25:41,192 INFO L168 Benchmark]: TraceAbstraction took 5068.76 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 58.5 MB in the beginning and 80.0 MB in the end (delta: -21.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:25:41,193 INFO L168 Benchmark]: Witness Printer took 34.76 ms. Allocated memory is still 113.2 MB. Free memory was 80.0 MB in the beginning and 76.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 20:25:41,194 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 94.4 MB. Free memory was 51.9 MB in the beginning and 51.8 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 149.06 ms. Allocated memory is still 94.4 MB. Free memory was 66.2 MB in the beginning and 71.1 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 19.13 ms. Allocated memory is still 94.4 MB. Free memory was 71.1 MB in the beginning and 69.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 11.86 ms. Allocated memory is still 94.4 MB. Free memory was 69.9 MB in the beginning and 68.9 MB in the end (delta: 941.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 174.28 ms. Allocated memory is still 94.4 MB. Free memory was 68.9 MB in the beginning and 58.8 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5068.76 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 58.5 MB in the beginning and 80.0 MB in the end (delta: -21.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 34.76 ms. Allocated memory is still 113.2 MB. Free memory was 80.0 MB in the beginning and 76.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: integer overflow possible integer overflow possible We found a FailurePath: [L15] int x, y; [L16] x = 1 [L17] y = 1 [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] 3*y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.9s, OverallIterations: 11, TraceHistogramMax: 20, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 156 SDslu, 234 SDs, 0 SdLazy, 233 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 550 GetRequests, 417 SyntacticMatches, 30 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 466 NumberOfCodeBlocks, 466 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 518 ConstructedInterpolants, 0 QuantifiedInterpolants, 75072 SizeOfPredicates, 0 NumberOfNonLiveVariables, 330 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/1800 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 incorrect! Received shutdown request...