./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.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_3723b9be-fee7-4249-8c51-67a166b8f53c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/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 85017c4a5a64f245bd703090448e8d5785d54b75 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 13:48:46,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 13:48:46,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 13:48:46,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 13:48:46,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 13:48:46,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 13:48:46,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 13:48:46,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 13:48:46,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 13:48:46,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 13:48:46,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 13:48:46,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 13:48:46,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 13:48:46,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 13:48:46,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 13:48:46,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 13:48:46,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 13:48:46,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 13:48:46,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 13:48:46,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 13:48:46,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 13:48:46,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 13:48:46,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 13:48:46,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 13:48:46,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 13:48:46,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 13:48:46,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 13:48:46,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 13:48:46,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 13:48:46,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 13:48:46,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 13:48:46,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 13:48:46,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 13:48:46,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 13:48:46,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 13:48:46,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 13:48:46,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 13:48:46,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 13:48:46,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 13:48:46,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 13:48:46,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 13:48:46,354 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-09 13:48:46,371 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 13:48:46,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 13:48:46,371 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 13:48:46,371 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 13:48:46,372 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 13:48:46,372 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 13:48:46,372 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 13:48:46,372 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 13:48:46,372 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 13:48:46,372 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 13:48:46,372 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 13:48:46,372 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 13:48:46,373 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 13:48:46,373 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 13:48:46,373 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 13:48:46,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 13:48:46,373 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 13:48:46,374 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 13:48:46,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 13:48:46,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 13:48:46,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 13:48:46,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 13:48:46,374 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 13:48:46,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 13:48:46,374 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 13:48:46,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 13:48:46,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 13:48:46,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 13:48:46,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 13:48:46,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 13:48:46,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 13:48:46,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 13:48:46,375 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 13:48:46,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 13:48:46,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 13:48:46,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 13:48:46,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 13:48:46,376 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_3723b9be-fee7-4249-8c51-67a166b8f53c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85017c4a5a64f245bd703090448e8d5785d54b75 [2020-12-09 13:48:46,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 13:48:46,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 13:48:46,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 13:48:46,569 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 13:48:46,570 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 13:48:46,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.c [2020-12-09 13:48:46,611 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/bin/utaipan/data/e7cdd3f0e/9ed9c6ba5fcb431298d1f09bd62fd0e7/FLAGe65ba6b0b [2020-12-09 13:48:46,964 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 13:48:46,964 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Introduction.c [2020-12-09 13:48:46,969 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/bin/utaipan/data/e7cdd3f0e/9ed9c6ba5fcb431298d1f09bd62fd0e7/FLAGe65ba6b0b [2020-12-09 13:48:46,979 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/bin/utaipan/data/e7cdd3f0e/9ed9c6ba5fcb431298d1f09bd62fd0e7 [2020-12-09 13:48:46,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 13:48:46,982 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 13:48:46,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 13:48:46,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 13:48:46,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 13:48:46,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:48:46" (1/1) ... [2020-12-09 13:48:46,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@140d3ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:48:46, skipping insertion in model container [2020-12-09 13:48:46,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 01:48:46" (1/1) ... [2020-12-09 13:48:46,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 13:48:47,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 13:48:47,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 13:48:47,099 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 13:48:47,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 13:48:47,116 INFO L208 MainTranslator]: Completed translation [2020-12-09 13:48:47,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:48:47 WrapperNode [2020-12-09 13:48:47,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 13:48:47,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 13:48:47,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 13:48:47,118 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 13:48:47,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:48:47" (1/1) ... [2020-12-09 13:48:47,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:48:47" (1/1) ... [2020-12-09 13:48:47,138 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 13:48:47,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 13:48:47,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 13:48:47,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 13:48:47,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:48:47" (1/1) ... [2020-12-09 13:48:47,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:48:47" (1/1) ... [2020-12-09 13:48:47,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:48:47" (1/1) ... [2020-12-09 13:48:47,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:48:47" (1/1) ... [2020-12-09 13:48:47,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:48:47" (1/1) ... [2020-12-09 13:48:47,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:48:47" (1/1) ... [2020-12-09 13:48:47,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:48:47" (1/1) ... [2020-12-09 13:48:47,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 13:48:47,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 13:48:47,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 13:48:47,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 13:48:47,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:48:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/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 13:48:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 13:48:47,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 13:48:47,347 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 13:48:47,347 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 13:48:47,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:48:47 BoogieIcfgContainer [2020-12-09 13:48:47,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 13:48:47,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 13:48:47,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 13:48:47,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 13:48:47,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 01:48:46" (1/3) ... [2020-12-09 13:48:47,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f265804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:48:47, skipping insertion in model container [2020-12-09 13:48:47,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 01:48:47" (2/3) ... [2020-12-09 13:48:47,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f265804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 01:48:47, skipping insertion in model container [2020-12-09 13:48:47,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:48:47" (3/3) ... [2020-12-09 13:48:47,357 INFO L111 eAbstractionObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Introduction.c [2020-12-09 13:48:47,374 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 13:48:47,376 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-09 13:48:47,387 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 13:48:47,408 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 13:48:47,409 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 13:48:47,409 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 13:48:47,409 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 13:48:47,409 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 13:48:47,409 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 13:48:47,409 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 13:48:47,409 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 13:48:47,421 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 13:48:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 13:48:47,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:48:47,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 13:48:47,427 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 13:48:47,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:48:47,431 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-12-09 13:48:47,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 13:48:47,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43923979] [2020-12-09 13:48:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 13:48:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:47,535 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 13:48:47,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43923979] [2020-12-09 13:48:47,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 13:48:47,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 13:48:47,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814699665] [2020-12-09 13:48:47,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 13:48:47,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 13:48:47,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 13:48:47,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 13:48:47,551 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-12-09 13:48:47,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:48:47,584 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-12-09 13:48:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 13:48:47,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 13:48:47,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:48:47,591 INFO L225 Difference]: With dead ends: 16 [2020-12-09 13:48:47,591 INFO L226 Difference]: Without dead ends: 13 [2020-12-09 13:48:47,592 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 13:48:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-09 13:48:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-12-09 13:48:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-09 13:48:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-09 13:48:47,614 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2020-12-09 13:48:47,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:48:47,614 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-09 13:48:47,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 13:48:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-09 13:48:47,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 13:48:47,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:48:47,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 13:48:47,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 13:48:47,615 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 13:48:47,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:48:47,616 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2020-12-09 13:48:47,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 13:48:47,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043131712] [2020-12-09 13:48:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 13:48:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:47,636 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 13:48:47,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043131712] [2020-12-09 13:48:47,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 13:48:47,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 13:48:47,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360066944] [2020-12-09 13:48:47,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 13:48:47,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 13:48:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 13:48:47,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 13:48:47,640 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-12-09 13:48:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:48:47,677 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-12-09 13:48:47,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 13:48:47,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 13:48:47,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:48:47,677 INFO L225 Difference]: With dead ends: 17 [2020-12-09 13:48:47,678 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 13:48:47,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 13:48:47,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 13:48:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-09 13:48:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 13:48:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-09 13:48:47,681 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 4 [2020-12-09 13:48:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:48:47,681 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-09 13:48:47,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 13:48:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-09 13:48:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 13:48:47,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:48:47,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 13:48:47,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 13:48:47,682 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 13:48:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:48:47,683 INFO L82 PathProgramCache]: Analyzing trace with hash 925739501, now seen corresponding path program 1 times [2020-12-09 13:48:47,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 13:48:47,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671380059] [2020-12-09 13:48:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 13:48:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:47,700 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 13:48:47,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671380059] [2020-12-09 13:48:47,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 13:48:47,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 13:48:47,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898361170] [2020-12-09 13:48:47,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 13:48:47,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 13:48:47,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 13:48:47,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 13:48:47,702 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2020-12-09 13:48:47,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:48:47,712 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-09 13:48:47,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 13:48:47,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 13:48:47,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:48:47,713 INFO L225 Difference]: With dead ends: 14 [2020-12-09 13:48:47,713 INFO L226 Difference]: Without dead ends: 13 [2020-12-09 13:48:47,714 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 13:48:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-09 13:48:47,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-09 13:48:47,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 13:48:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-09 13:48:47,717 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 6 [2020-12-09 13:48:47,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:48:47,717 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-09 13:48:47,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 13:48:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-09 13:48:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 13:48:47,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:48:47,718 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-09 13:48:47,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 13:48:47,718 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 13:48:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:48:47,719 INFO L82 PathProgramCache]: Analyzing trace with hash 577431471, now seen corresponding path program 1 times [2020-12-09 13:48:47,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 13:48:47,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243033323] [2020-12-09 13:48:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 13:48:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:47,758 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 13:48:47,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243033323] [2020-12-09 13:48:47,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227197106] [2020-12-09 13:48:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/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 13:48:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 13:48:47,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:48:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 13:48:47,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:48:47,898 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 13:48:47,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 13:48:47,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2020-12-09 13:48:47,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044643269] [2020-12-09 13:48:47,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 13:48:47,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 13:48:47,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 13:48:47,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-12-09 13:48:47,900 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-12-09 13:48:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:48:47,933 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-09 13:48:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 13:48:47,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 13:48:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:48:47,934 INFO L225 Difference]: With dead ends: 14 [2020-12-09 13:48:47,934 INFO L226 Difference]: Without dead ends: 13 [2020-12-09 13:48:47,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2020-12-09 13:48:47,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-09 13:48:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-12-09 13:48:47,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-09 13:48:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-09 13:48:47,938 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2020-12-09 13:48:47,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:48:47,938 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-09 13:48:47,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 13:48:47,938 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-09 13:48:47,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 13:48:47,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:48:47,939 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-12-09 13:48:48,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:48:48,140 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 13:48:48,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:48:48,142 INFO L82 PathProgramCache]: Analyzing trace with hash 720506461, now seen corresponding path program 1 times [2020-12-09 13:48:48,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 13:48:48,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977688508] [2020-12-09 13:48:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 13:48:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 13:48:48,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977688508] [2020-12-09 13:48:48,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490128951] [2020-12-09 13:48:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/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 13:48:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:48,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 13:48:48,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:48:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 13:48:48,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:48:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 13:48:48,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [58297447] [2020-12-09 13:48:48,370 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 13:48:48,371 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 13:48:48,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 13:48:48,377 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 13:48:48,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 13:48:48,524 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 13:48:48,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 13:48:48,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 11 [2020-12-09 13:48:48,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146703667] [2020-12-09 13:48:48,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 13:48:48,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 13:48:48,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 13:48:48,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-09 13:48:48,648 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-12-09 13:48:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:48:48,736 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-12-09 13:48:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 13:48:48,736 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-09 13:48:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:48:48,737 INFO L225 Difference]: With dead ends: 12 [2020-12-09 13:48:48,737 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 13:48:48,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-09 13:48:48,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 13:48:48,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 13:48:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 13:48:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-09 13:48:48,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-09 13:48:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:48:48,739 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-09 13:48:48,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 13:48:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-09 13:48:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 13:48:48,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:48:48,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-12-09 13:48:48,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:48:48,942 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 13:48:48,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:48:48,943 INFO L82 PathProgramCache]: Analyzing trace with hash 860863857, now seen corresponding path program 1 times [2020-12-09 13:48:48,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 13:48:48,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838419627] [2020-12-09 13:48:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 13:48:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:48,984 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 13:48:48,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838419627] [2020-12-09 13:48:48,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799499096] [2020-12-09 13:48:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/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 13:48:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:49,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 13:48:49,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:48:49,094 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 13:48:49,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:48:49,150 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 13:48:49,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033192488] [2020-12-09 13:48:49,153 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 13:48:49,153 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 13:48:49,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 13:48:49,154 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 13:48:49,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 13:48:49,237 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 13:48:49,368 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 13:48:49,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 13:48:49,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-09 13:48:49,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168732157] [2020-12-09 13:48:49,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 13:48:49,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 13:48:49,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 13:48:49,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-09 13:48:49,369 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-12-09 13:48:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:48:49,392 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-12-09 13:48:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 13:48:49,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-09 13:48:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:48:49,392 INFO L225 Difference]: With dead ends: 27 [2020-12-09 13:48:49,392 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 13:48:49,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-09 13:48:49,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 13:48:49,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-09 13:48:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 13:48:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-09 13:48:49,396 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 10 [2020-12-09 13:48:49,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:48:49,396 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-09 13:48:49,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 13:48:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-09 13:48:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 13:48:49,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:48:49,397 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1] [2020-12-09 13:48:49,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-09 13:48:49,598 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 13:48:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:48:49,599 INFO L82 PathProgramCache]: Analyzing trace with hash -333652957, now seen corresponding path program 2 times [2020-12-09 13:48:49,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 13:48:49,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147819990] [2020-12-09 13:48:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 13:48:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:49,675 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 13:48:49,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147819990] [2020-12-09 13:48:49,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476873367] [2020-12-09 13:48:49,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/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 13:48:49,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-09 13:48:49,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:48:49,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 13:48:49,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:48:49,723 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 13:48:49,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:48:49,779 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 13:48:49,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1362021854] [2020-12-09 13:48:49,780 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 13:48:49,780 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 13:48:49,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 13:48:49,781 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 13:48:49,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 13:48:49,842 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 13:48:50,017 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 13:48:50,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 13:48:50,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-12-09 13:48:50,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298007219] [2020-12-09 13:48:50,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 13:48:50,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 13:48:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 13:48:50,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-09 13:48:50,019 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 12 states. [2020-12-09 13:48:50,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:48:50,076 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-12-09 13:48:50,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 13:48:50,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-12-09 13:48:50,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:48:50,077 INFO L225 Difference]: With dead ends: 57 [2020-12-09 13:48:50,077 INFO L226 Difference]: Without dead ends: 56 [2020-12-09 13:48:50,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-09 13:48:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-09 13:48:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-09 13:48:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-09 13:48:50,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-12-09 13:48:50,083 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 25 [2020-12-09 13:48:50,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:48:50,083 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-12-09 13:48:50,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 13:48:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-12-09 13:48:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-09 13:48:50,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:48:50,084 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1] [2020-12-09 13:48:50,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:48:50,286 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 13:48:50,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:48:50,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1266934173, now seen corresponding path program 3 times [2020-12-09 13:48:50,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 13:48:50,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278197597] [2020-12-09 13:48:50,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 13:48:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:50,500 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 13:48:50,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278197597] [2020-12-09 13:48:50,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881203062] [2020-12-09 13:48:50,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/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 13:48:50,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 13:48:50,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:48:50,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 13:48:50,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:48:50,584 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 13:48:50,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:48:50,767 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 13:48:50,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109385353] [2020-12-09 13:48:50,769 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 13:48:50,770 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 13:48:50,770 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 13:48:50,770 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 13:48:50,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 13:48:50,819 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 13:48:51,095 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 13:48:51,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 13:48:51,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-12-09 13:48:51,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592803029] [2020-12-09 13:48:51,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-09 13:48:51,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 13:48:51,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-09 13:48:51,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-12-09 13:48:51,097 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 24 states. [2020-12-09 13:48:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:48:51,198 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2020-12-09 13:48:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-09 13:48:51,198 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-12-09 13:48:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:48:51,199 INFO L225 Difference]: With dead ends: 117 [2020-12-09 13:48:51,199 INFO L226 Difference]: Without dead ends: 116 [2020-12-09 13:48:51,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-12-09 13:48:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-09 13:48:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-12-09 13:48:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-09 13:48:51,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2020-12-09 13:48:51,208 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 55 [2020-12-09 13:48:51,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:48:51,209 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2020-12-09 13:48:51,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-09 13:48:51,209 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2020-12-09 13:48:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-09 13:48:51,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:48:51,212 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1] [2020-12-09 13:48:51,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-09 13:48:51,413 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 13:48:51,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:48:51,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1393971939, now seen corresponding path program 4 times [2020-12-09 13:48:51,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 13:48:51,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625809900] [2020-12-09 13:48:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 13:48:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 13:48:51,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625809900] [2020-12-09 13:48:51,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385953780] [2020-12-09 13:48:51,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/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 13:48:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:51,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 13:48:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:48:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 13:48:52,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:48:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 13:48:52,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1042928372] [2020-12-09 13:48:52,562 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 13:48:52,562 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 13:48:52,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 13:48:52,562 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 13:48:52,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 13:48:52,612 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 13:48:53,185 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 13:48:53,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 13:48:53,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2020-12-09 13:48:53,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389619118] [2020-12-09 13:48:53,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-09 13:48:53,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 13:48:53,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-09 13:48:53,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2020-12-09 13:48:53,189 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 48 states. [2020-12-09 13:48:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:48:53,365 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2020-12-09 13:48:53,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-09 13:48:53,365 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 115 [2020-12-09 13:48:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:48:53,367 INFO L225 Difference]: With dead ends: 237 [2020-12-09 13:48:53,367 INFO L226 Difference]: Without dead ends: 236 [2020-12-09 13:48:53,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 292 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2020-12-09 13:48:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-09 13:48:53,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2020-12-09 13:48:53,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-12-09 13:48:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2020-12-09 13:48:53,381 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 115 [2020-12-09 13:48:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:48:53,381 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2020-12-09 13:48:53,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-09 13:48:53,381 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2020-12-09 13:48:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-12-09 13:48:53,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 13:48:53,384 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1] [2020-12-09 13:48:53,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:48:53,586 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 13:48:53,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 13:48:53,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1923709923, now seen corresponding path program 5 times [2020-12-09 13:48:53,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 13:48:53,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495283228] [2020-12-09 13:48:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 13:48:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 13:48:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 13:48:54,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495283228] [2020-12-09 13:48:54,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221620745] [2020-12-09 13:48:54,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:48:54,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-09 13:48:54,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 13:48:54,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 13:48:54,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 13:48:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2020-12-09 13:48:54,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 13:48:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 737 proven. 21 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2020-12-09 13:48:55,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1205979315] [2020-12-09 13:48:55,154 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 13:48:55,154 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 13:48:55,155 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 13:48:55,155 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 13:48:55,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 13:48:55,193 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 13:48:57,423 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 13:48:57,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 13:48:57,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 8, 8] total 62 [2020-12-09 13:48:57,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408730886] [2020-12-09 13:48:57,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-09 13:48:57,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 13:48:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-09 13:48:57,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1557, Invalid=2999, Unknown=0, NotChecked=0, Total=4556 [2020-12-09 13:48:57,427 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 63 states. [2020-12-09 13:49:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 13:49:02,691 INFO L93 Difference]: Finished difference Result 243 states and 244 transitions. [2020-12-09 13:49:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2020-12-09 13:49:02,692 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 235 [2020-12-09 13:49:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 13:49:02,692 INFO L225 Difference]: With dead ends: 243 [2020-12-09 13:49:02,692 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 13:49:02,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 637 SyntacticMatches, 47 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16599 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=12643, Invalid=32089, Unknown=0, NotChecked=0, Total=44732 [2020-12-09 13:49:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 13:49:02,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 13:49:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 13:49:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 13:49:02,704 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 235 [2020-12-09 13:49:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 13:49:02,704 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 13:49:02,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-09 13:49:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 13:49:02,704 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 13:49:02,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 13:49:02,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 13:49:03,205 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 24 [2020-12-09 13:49:03,207 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2020-12-09 13:49:03,207 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 13:49:03,207 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-09 13:49:03,207 INFO L262 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-12-09 13:49:03,207 INFO L262 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-12-09 13:49:03,207 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2020-12-09 13:49:03,207 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-09 13:49:03,207 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 13:49:03,207 INFO L262 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-12-09 13:49:03,208 INFO L262 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-12-09 13:49:03,208 INFO L258 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~y~0 (+ (div (+ (* ULTIMATE.start_main_~x~0 (- 1)) 2147483648) 2) 1)) (<= 2 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 2147483646)) (and (<= 0 (+ ULTIMATE.start_main_~x~0 2147483648)) (<= (+ ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) 2147483648) (= ULTIMATE.start_main_~y~0 1))) [2020-12-09 13:49:03,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 01:49:03 BoogieIcfgContainer [2020-12-09 13:49:03,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 13:49:03,221 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 13:49:03,221 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 13:49:03,221 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 13:49:03,222 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 01:48:47" (3/4) ... [2020-12-09 13:49:03,224 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 13:49:03,230 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-09 13:49:03,230 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-09 13:49:03,230 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 13:49:03,253 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3723b9be-fee7-4249-8c51-67a166b8f53c/bin/utaipan/witness.graphml [2020-12-09 13:49:03,254 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 13:49:03,254 INFO L168 Benchmark]: Toolchain (without parser) took 16271.83 ms. Allocated memory was 113.2 MB in the beginning and 172.0 MB in the end (delta: 58.7 MB). Free memory was 84.9 MB in the beginning and 51.2 MB in the end (delta: 33.7 MB). Peak memory consumption was 92.9 MB. Max. memory is 16.1 GB. [2020-12-09 13:49:03,255 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 113.2 MB. Free memory is still 90.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 13:49:03,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 133.04 ms. Allocated memory is still 113.2 MB. Free memory was 84.7 MB in the beginning and 76.4 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 13:49:03,255 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.93 ms. Allocated memory is still 113.2 MB. Free memory was 76.3 MB in the beginning and 74.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 13:49:03,256 INFO L168 Benchmark]: Boogie Preprocessor took 12.07 ms. Allocated memory is still 113.2 MB. Free memory was 74.8 MB in the beginning and 74.0 MB in the end (delta: 782.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 13:49:03,256 INFO L168 Benchmark]: RCFGBuilder took 197.98 ms. Allocated memory is still 113.2 MB. Free memory was 73.9 MB in the beginning and 92.2 MB in the end (delta: -18.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. [2020-12-09 13:49:03,257 INFO L168 Benchmark]: TraceAbstraction took 15869.86 ms. Allocated memory was 113.2 MB in the beginning and 172.0 MB in the end (delta: 58.7 MB). Free memory was 91.8 MB in the beginning and 53.3 MB in the end (delta: 38.5 MB). Peak memory consumption was 98.7 MB. Max. memory is 16.1 GB. [2020-12-09 13:49:03,257 INFO L168 Benchmark]: Witness Printer took 32.38 ms. Allocated memory is still 172.0 MB. Free memory was 53.3 MB in the beginning and 51.2 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 13:49:03,259 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 113.2 MB. Free memory is still 90.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 133.04 ms. Allocated memory is still 113.2 MB. Free memory was 84.7 MB in the beginning and 76.4 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 20.93 ms. Allocated memory is still 113.2 MB. Free memory was 76.3 MB in the beginning and 74.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 12.07 ms. Allocated memory is still 113.2 MB. Free memory was 74.8 MB in the beginning and 74.0 MB in the end (delta: 782.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 197.98 ms. Allocated memory is still 113.2 MB. Free memory was 73.9 MB in the beginning and 92.2 MB in the end (delta: -18.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15869.86 ms. Allocated memory was 113.2 MB in the beginning and 172.0 MB in the end (delta: 58.7 MB). Free memory was 91.8 MB in the beginning and 53.3 MB in the end (delta: 38.5 MB). Peak memory consumption was 98.7 MB. Max. memory is 16.1 GB. * Witness Printer took 32.38 ms. Allocated memory is still 172.0 MB. Free memory was 53.3 MB in the beginning and 51.2 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((y <= (x * -1 + 2147483648) / 2 + 1 && 2 <= y) && y <= 2147483646) || ((0 <= x + 2147483648 && x + y <= 2147483648) && y == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.4s, OverallIterations: 10, TraceHistogramMax: 47, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 381 SDslu, 83 SDs, 0 SdLazy, 699 SolverSat, 219 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1596 GetRequests, 1164 SyntacticMatches, 91 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19286 ImplicationChecksByTransitivity, 10.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=236occurred 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, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 49 NumberOfFragments, 33 HoareAnnotationTreeSize, 1 FomulaSimplifications, 367 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FomulaSimplificationsInter, 1884 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 927 NumberOfCodeBlocks, 717 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1360 ConstructedInterpolants, 0 QuantifiedInterpolants, 455092 SizeOfPredicates, 4 NumberOfNonLiveVariables, 478 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 24 InterpolantComputations, 4 PerfectInterpolantSequences, 10678/20766 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: OVERALL_TIME[ms]: 154, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 24, TOOLS_POST_TIME[ms]: 23, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 24, TOOLS_QUANTIFIERELIM_TIME[ms]: 18, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 4, FLUID_QUERY_TIME[ms]: 2, FLUID_QUERIES: 39, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME[ms]: 36, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 56, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 4, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME[ms]: 5, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 79, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 78, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 1, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 5, DAG_COMPRESSION_PROCESSED_NODES: 75, DAG_COMPRESSION_RETAINED_NODES: 27, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...