./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/gcd02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/gcd02.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/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 32bit --witnessprinter.graph.data.programhash ad183272c46520d125e7fadb8bd25966ebd670c1 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:41:05,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:41:05,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:41:05,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:41:05,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:41:05,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:41:05,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:41:05,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:41:05,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:41:05,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:41:05,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:41:05,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:41:05,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:41:05,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:41:05,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:41:05,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:41:05,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:41:05,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:41:05,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:41:05,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:41:05,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:41:05,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:41:05,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:41:05,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:41:05,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:41:05,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:41:05,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:41:05,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:41:05,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:41:05,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:41:05,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:41:05,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:41:05,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:41:05,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:41:05,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:41:05,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:41:05,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:41:05,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:41:05,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:41:05,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:41:05,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:41:05,787 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2020-12-03 12:41:05,812 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:41:05,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:41:05,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:41:05,814 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:41:05,815 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:41:05,815 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:41:05,815 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:41:05,815 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:41:05,816 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:41:05,816 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:41:05,816 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:41:05,816 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:41:05,817 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:41:05,817 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:41:05,817 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:41:05,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:41:05,818 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:41:05,819 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:41:05,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:41:05,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:41:05,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:41:05,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:41:05,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:41:05,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:41:05,822 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-03 12:41:05,822 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:41:05,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:41:05,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:41:05,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:41:05,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:41:05,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:41:05,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:41:05,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:41:05,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:41:05,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:41:05,828 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:41:05,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:41:05,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:41:05,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:41:05,830 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:41:05,830 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_4362f0b3-2ca9-4f9c-abc2-93b896d38124/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad183272c46520d125e7fadb8bd25966ebd670c1 [2020-12-03 12:41:06,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:41:06,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:41:06,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:41:06,149 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:41:06,150 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:41:06,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/bin/utaipan/../../sv-benchmarks/c/recursive/gcd02.c [2020-12-03 12:41:06,228 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/bin/utaipan/data/b6fa1df62/404a30b5e5d0446c885e5cdc4ed86c0f/FLAG8cb095e61 [2020-12-03 12:41:06,702 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:41:06,702 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/sv-benchmarks/c/recursive/gcd02.c [2020-12-03 12:41:06,708 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/bin/utaipan/data/b6fa1df62/404a30b5e5d0446c885e5cdc4ed86c0f/FLAG8cb095e61 [2020-12-03 12:41:07,088 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/bin/utaipan/data/b6fa1df62/404a30b5e5d0446c885e5cdc4ed86c0f [2020-12-03 12:41:07,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:41:07,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:41:07,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:41:07,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:41:07,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:41:07,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:41:07" (1/1) ... [2020-12-03 12:41:07,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe1a830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:41:07, skipping insertion in model container [2020-12-03 12:41:07,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:41:07" (1/1) ... [2020-12-03 12:41:07,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:41:07,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:41:07,255 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/sv-benchmarks/c/recursive/gcd02.c[623,636] [2020-12-03 12:41:07,273 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/sv-benchmarks/c/recursive/gcd02.c[1283,1296] [2020-12-03 12:41:07,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:41:07,294 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:41:07,316 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/sv-benchmarks/c/recursive/gcd02.c[623,636] [2020-12-03 12:41:07,336 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/sv-benchmarks/c/recursive/gcd02.c[1283,1296] [2020-12-03 12:41:07,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:41:07,354 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:41:07,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:41:07 WrapperNode [2020-12-03 12:41:07,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:41:07,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:41:07,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:41:07,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:41:07,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:41:07" (1/1) ... [2020-12-03 12:41:07,375 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:41:07" (1/1) ... [2020-12-03 12:41:07,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:41:07,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:41:07,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:41:07,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:41:07,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:41:07" (1/1) ... [2020-12-03 12:41:07,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:41:07" (1/1) ... [2020-12-03 12:41:07,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:41:07" (1/1) ... [2020-12-03 12:41:07,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:41:07" (1/1) ... [2020-12-03 12:41:07,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:41:07" (1/1) ... [2020-12-03 12:41:07,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:41:07" (1/1) ... [2020-12-03 12:41:07,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:41:07" (1/1) ... [2020-12-03 12:41:07,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:41:07,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:41:07,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:41:07,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:41:07,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:41:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/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 [2020-12-03 12:41:07,487 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-12-03 12:41:07,487 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-12-03 12:41:07,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:41:07,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:41:07,488 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2020-12-03 12:41:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2020-12-03 12:41:07,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:41:07,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:41:07,921 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:41:07,922 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-03 12:41:07,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:41:07 BoogieIcfgContainer [2020-12-03 12:41:07,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:41:07,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:41:07,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:41:07,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:41:07,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:41:07" (1/3) ... [2020-12-03 12:41:07,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a27bbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:41:07, skipping insertion in model container [2020-12-03 12:41:07,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:41:07" (2/3) ... [2020-12-03 12:41:07,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a27bbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:41:07, skipping insertion in model container [2020-12-03 12:41:07,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:41:07" (3/3) ... [2020-12-03 12:41:07,933 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd02.c [2020-12-03 12:41:07,964 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:41:07,967 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-03 12:41:07,983 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-03 12:41:08,009 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:41:08,010 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:41:08,010 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:41:08,010 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:41:08,010 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:41:08,010 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:41:08,011 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:41:08,011 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:41:08,029 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-12-03 12:41:08,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 12:41:08,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:41:08,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:41:08,036 INFO L429 AbstractCegarLoop]: === Iteration 1 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:41:08,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:41:08,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1791775700, now seen corresponding path program 1 times [2020-12-03 12:41:08,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:41:08,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868814181] [2020-12-03 12:41:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:41:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:41:08,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868814181] [2020-12-03 12:41:08,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:41:08,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:41:08,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730197291] [2020-12-03 12:41:08,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:41:08,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:41:08,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:41:08,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:41:08,293 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-12-03 12:41:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:41:08,423 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-12-03 12:41:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:41:08,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-03 12:41:08,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:41:08,435 INFO L225 Difference]: With dead ends: 58 [2020-12-03 12:41:08,435 INFO L226 Difference]: Without dead ends: 48 [2020-12-03 12:41:08,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:41:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-03 12:41:08,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-12-03 12:41:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-03 12:41:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-12-03 12:41:08,484 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 9 [2020-12-03 12:41:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:41:08,485 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-12-03 12:41:08,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:41:08,485 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-12-03 12:41:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 12:41:08,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:41:08,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:41:08,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:41:08,487 INFO L429 AbstractCegarLoop]: === Iteration 2 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:41:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:41:08,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1791775476, now seen corresponding path program 1 times [2020-12-03 12:41:08,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:41:08,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479726925] [2020-12-03 12:41:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:41:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:41:08,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479726925] [2020-12-03 12:41:08,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:41:08,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:41:08,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923995885] [2020-12-03 12:41:08,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:41:08,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:41:08,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:41:08,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:41:08,546 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2020-12-03 12:41:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:41:08,678 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2020-12-03 12:41:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:41:08,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-03 12:41:08,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:41:08,685 INFO L225 Difference]: With dead ends: 76 [2020-12-03 12:41:08,685 INFO L226 Difference]: Without dead ends: 74 [2020-12-03 12:41:08,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:41:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-03 12:41:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2020-12-03 12:41:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-03 12:41:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2020-12-03 12:41:08,722 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 9 [2020-12-03 12:41:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:41:08,722 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2020-12-03 12:41:08,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:41:08,723 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2020-12-03 12:41:08,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-03 12:41:08,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:41:08,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:41:08,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:41:08,724 INFO L429 AbstractCegarLoop]: === Iteration 3 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:41:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:41:08,725 INFO L82 PathProgramCache]: Analyzing trace with hash -14734120, now seen corresponding path program 1 times [2020-12-03 12:41:08,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:41:08,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199934105] [2020-12-03 12:41:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:41:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:41:08,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199934105] [2020-12-03 12:41:08,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:41:08,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-03 12:41:08,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677493716] [2020-12-03 12:41:08,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 12:41:08,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:41:08,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 12:41:08,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-03 12:41:08,884 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 8 states. [2020-12-03 12:41:09,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:41:09,094 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2020-12-03 12:41:09,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 12:41:09,095 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-03 12:41:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:41:09,097 INFO L225 Difference]: With dead ends: 87 [2020-12-03 12:41:09,097 INFO L226 Difference]: Without dead ends: 86 [2020-12-03 12:41:09,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:41:09,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-03 12:41:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2020-12-03 12:41:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-03 12:41:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2020-12-03 12:41:09,121 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 15 [2020-12-03 12:41:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:41:09,121 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2020-12-03 12:41:09,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 12:41:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2020-12-03 12:41:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-03 12:41:09,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:41:09,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:41:09,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:41:09,126 INFO L429 AbstractCegarLoop]: === Iteration 4 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:41:09,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:41:09,128 INFO L82 PathProgramCache]: Analyzing trace with hash 385462493, now seen corresponding path program 1 times [2020-12-03 12:41:09,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:41:09,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441547732] [2020-12-03 12:41:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:41:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:41:09,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441547732] [2020-12-03 12:41:09,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784047426] [2020-12-03 12:41:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/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 [2020-12-03 12:41:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:09,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-03 12:41:09,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:41:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:41:09,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:41:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:41:09,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1630371366] [2020-12-03 12:41:09,592 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-03 12:41:09,592 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:41:09,600 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:41:09,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:41:09,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2020-12-03 12:41:09,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003991882] [2020-12-03 12:41:09,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-03 12:41:09,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:41:09,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-03 12:41:09,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-12-03 12:41:09,613 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand 15 states. [2020-12-03 12:41:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:41:09,920 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2020-12-03 12:41:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-03 12:41:09,921 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2020-12-03 12:41:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:41:09,927 INFO L225 Difference]: With dead ends: 94 [2020-12-03 12:41:09,928 INFO L226 Difference]: Without dead ends: 93 [2020-12-03 12:41:09,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-12-03 12:41:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-03 12:41:09,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-12-03 12:41:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-03 12:41:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2020-12-03 12:41:09,955 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 15 [2020-12-03 12:41:09,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:41:09,956 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2020-12-03 12:41:09,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-03 12:41:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2020-12-03 12:41:09,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-03 12:41:09,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:41:09,958 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:41:10,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:41:10,173 INFO L429 AbstractCegarLoop]: === Iteration 5 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:41:10,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:41:10,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1049117310, now seen corresponding path program 1 times [2020-12-03 12:41:10,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:41:10,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535961057] [2020-12-03 12:41:10,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:41:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:41:10,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535961057] [2020-12-03 12:41:10,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356768815] [2020-12-03 12:41:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/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 [2020-12-03 12:41:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:10,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-03 12:41:10,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:41:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:41:10,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:41:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:41:10,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [157734459] [2020-12-03 12:41:10,479 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-03 12:41:10,480 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:41:10,480 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-03 12:41:10,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:41:10,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2020-12-03 12:41:10,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187871882] [2020-12-03 12:41:10,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-03 12:41:10,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:41:10,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-03 12:41:10,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-12-03 12:41:10,482 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand 15 states. [2020-12-03 12:41:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:41:10,912 INFO L93 Difference]: Finished difference Result 114 states and 141 transitions. [2020-12-03 12:41:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-03 12:41:10,915 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2020-12-03 12:41:10,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:41:10,922 INFO L225 Difference]: With dead ends: 114 [2020-12-03 12:41:10,922 INFO L226 Difference]: Without dead ends: 113 [2020-12-03 12:41:10,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2020-12-03 12:41:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-03 12:41:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2020-12-03 12:41:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-03 12:41:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2020-12-03 12:41:10,951 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 15 [2020-12-03 12:41:10,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:41:10,951 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2020-12-03 12:41:10,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-03 12:41:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2020-12-03 12:41:10,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-03 12:41:10,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:41:10,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:41:11,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:41:11,181 INFO L429 AbstractCegarLoop]: === Iteration 6 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:41:11,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:41:11,181 INFO L82 PathProgramCache]: Analyzing trace with hash -456757678, now seen corresponding path program 1 times [2020-12-03 12:41:11,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:41:11,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324644930] [2020-12-03 12:41:11,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:41:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:41:11,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324644930] [2020-12-03 12:41:11,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:41:11,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:41:11,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931740585] [2020-12-03 12:41:11,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:41:11,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:41:11,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:41:11,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:41:11,220 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand 3 states. [2020-12-03 12:41:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:41:11,238 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2020-12-03 12:41:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:41:11,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-03 12:41:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:41:11,239 INFO L225 Difference]: With dead ends: 101 [2020-12-03 12:41:11,239 INFO L226 Difference]: Without dead ends: 100 [2020-12-03 12:41:11,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:41:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-03 12:41:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-12-03 12:41:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-03 12:41:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2020-12-03 12:41:11,251 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 16 [2020-12-03 12:41:11,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:41:11,251 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2020-12-03 12:41:11,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:41:11,251 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2020-12-03 12:41:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-03 12:41:11,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:41:11,258 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:41:11,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-03 12:41:11,259 INFO L429 AbstractCegarLoop]: === Iteration 7 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:41:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:41:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1846140513, now seen corresponding path program 1 times [2020-12-03 12:41:11,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:41:11,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172738954] [2020-12-03 12:41:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:41:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:41:11,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172738954] [2020-12-03 12:41:11,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213435263] [2020-12-03 12:41:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/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 [2020-12-03 12:41:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:11,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-03 12:41:11,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:41:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:41:11,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:41:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:41:11,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-03 12:41:11,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 10] total 25 [2020-12-03 12:41:11,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078482049] [2020-12-03 12:41:11,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-03 12:41:11,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:41:11,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-03 12:41:11,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-03 12:41:11,948 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand 11 states. [2020-12-03 12:41:12,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:41:12,137 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-12-03 12:41:12,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-03 12:41:12,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-12-03 12:41:12,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:41:12,140 INFO L225 Difference]: With dead ends: 119 [2020-12-03 12:41:12,141 INFO L226 Difference]: Without dead ends: 102 [2020-12-03 12:41:12,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2020-12-03 12:41:12,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-03 12:41:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2020-12-03 12:41:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-03 12:41:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-12-03 12:41:12,172 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 21 [2020-12-03 12:41:12,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:41:12,173 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-12-03 12:41:12,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-03 12:41:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-12-03 12:41:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-03 12:41:12,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:41:12,179 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:41:12,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:41:12,403 INFO L429 AbstractCegarLoop]: === Iteration 8 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:41:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:41:12,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1039577488, now seen corresponding path program 1 times [2020-12-03 12:41:12,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:41:12,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919217448] [2020-12-03 12:41:12,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:41:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-03 12:41:12,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919217448] [2020-12-03 12:41:12,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:41:12,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-03 12:41:12,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516818159] [2020-12-03 12:41:12,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-03 12:41:12,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:41:12,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-03 12:41:12,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:41:12,488 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 9 states. [2020-12-03 12:41:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:41:12,622 INFO L93 Difference]: Finished difference Result 119 states and 144 transitions. [2020-12-03 12:41:12,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 12:41:12,623 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-12-03 12:41:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:41:12,624 INFO L225 Difference]: With dead ends: 119 [2020-12-03 12:41:12,624 INFO L226 Difference]: Without dead ends: 118 [2020-12-03 12:41:12,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:41:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-03 12:41:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2020-12-03 12:41:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-03 12:41:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2020-12-03 12:41:12,635 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 24 [2020-12-03 12:41:12,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:41:12,636 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2020-12-03 12:41:12,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-03 12:41:12,636 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2020-12-03 12:41:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-03 12:41:12,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:41:12,638 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:41:12,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-03 12:41:12,638 INFO L429 AbstractCegarLoop]: === Iteration 9 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:41:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:41:12,638 INFO L82 PathProgramCache]: Analyzing trace with hash 859424006, now seen corresponding path program 1 times [2020-12-03 12:41:12,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:41:12,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678125414] [2020-12-03 12:41:12,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:41:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:41:12,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678125414] [2020-12-03 12:41:12,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383712242] [2020-12-03 12:41:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/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 [2020-12-03 12:41:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:12,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-03 12:41:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:41:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-03 12:41:12,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:41:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-03 12:41:13,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-03 12:41:13,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [10] total 22 [2020-12-03 12:41:13,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116072095] [2020-12-03 12:41:13,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-03 12:41:13,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:41:13,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-03 12:41:13,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-12-03 12:41:13,197 INFO L87 Difference]: Start difference. First operand 104 states and 123 transitions. Second operand 15 states. [2020-12-03 12:41:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:41:13,358 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2020-12-03 12:41:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-03 12:41:13,358 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-12-03 12:41:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:41:13,364 INFO L225 Difference]: With dead ends: 133 [2020-12-03 12:41:13,364 INFO L226 Difference]: Without dead ends: 115 [2020-12-03 12:41:13,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-12-03 12:41:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-03 12:41:13,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-12-03 12:41:13,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-03 12:41:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2020-12-03 12:41:13,381 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 24 [2020-12-03 12:41:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:41:13,382 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2020-12-03 12:41:13,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-03 12:41:13,383 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2020-12-03 12:41:13,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-03 12:41:13,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:41:13,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:41:13,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:41:13,601 INFO L429 AbstractCegarLoop]: === Iteration 10 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:41:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:41:13,601 INFO L82 PathProgramCache]: Analyzing trace with hash -271946247, now seen corresponding path program 1 times [2020-12-03 12:41:13,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:41:13,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826228617] [2020-12-03 12:41:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:41:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-03 12:41:13,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826228617] [2020-12-03 12:41:13,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334948993] [2020-12-03 12:41:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/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 [2020-12-03 12:41:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:13,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-03 12:41:13,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:41:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-03 12:41:14,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:41:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-03 12:41:14,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-03 12:41:14,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 28 [2020-12-03 12:41:14,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705196446] [2020-12-03 12:41:14,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:41:14,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:41:14,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:41:14,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2020-12-03 12:41:14,369 INFO L87 Difference]: Start difference. First operand 104 states and 121 transitions. Second operand 12 states. [2020-12-03 12:41:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:41:14,587 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2020-12-03 12:41:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-03 12:41:14,588 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-12-03 12:41:14,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:41:14,589 INFO L225 Difference]: With dead ends: 125 [2020-12-03 12:41:14,589 INFO L226 Difference]: Without dead ends: 104 [2020-12-03 12:41:14,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2020-12-03 12:41:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-03 12:41:14,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2020-12-03 12:41:14,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-03 12:41:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2020-12-03 12:41:14,604 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 30 [2020-12-03 12:41:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:41:14,604 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2020-12-03 12:41:14,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:41:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2020-12-03 12:41:14,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-03 12:41:14,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:41:14,609 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:41:14,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-03 12:41:14,836 INFO L429 AbstractCegarLoop]: === Iteration 11 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:41:14,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:41:14,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1509719284, now seen corresponding path program 1 times [2020-12-03 12:41:14,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:41:14,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863832863] [2020-12-03 12:41:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:41:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-03 12:41:15,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863832863] [2020-12-03 12:41:15,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976280477] [2020-12-03 12:41:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/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 [2020-12-03 12:41:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:41:15,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-03 12:41:15,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:41:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-03 12:41:15,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:41:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-03 12:41:15,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-03 12:41:15,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [14] total 28 [2020-12-03 12:41:15,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483419761] [2020-12-03 12:41:15,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-03 12:41:15,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:41:15,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-03 12:41:15,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2020-12-03 12:41:15,726 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand 16 states. [2020-12-03 12:41:15,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:41:15,932 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-12-03 12:41:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-03 12:41:15,932 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-12-03 12:41:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:41:15,933 INFO L225 Difference]: With dead ends: 92 [2020-12-03 12:41:15,933 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 12:41:15,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2020-12-03 12:41:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 12:41:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 12:41:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 12:41:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 12:41:15,934 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-12-03 12:41:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:41:15,935 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 12:41:15,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-03 12:41:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 12:41:15,935 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 12:41:16,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:41:16,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-03 12:41:16,432 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28 [2020-12-03 12:41:16,593 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-12-03 12:41:16,669 INFO L262 CegarLoopResult]: For program point L33(lines 33 35) no Hoare annotation was computed. [2020-12-03 12:41:16,669 INFO L262 CegarLoopResult]: For program point dividesFINAL(lines 32 40) no Hoare annotation was computed. [2020-12-03 12:41:16,670 INFO L262 CegarLoopResult]: For program point dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 39) no Hoare annotation was computed. [2020-12-03 12:41:16,670 INFO L262 CegarLoopResult]: For program point dividesEXIT(lines 32 40) no Hoare annotation was computed. [2020-12-03 12:41:16,670 INFO L262 CegarLoopResult]: For program point dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 39) no Hoare annotation was computed. [2020-12-03 12:41:16,670 INFO L262 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-12-03 12:41:16,670 INFO L262 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-12-03 12:41:16,670 INFO L258 CegarLoopResult]: At program point L39-2(line 39) the Hoare annotation is: (let ((.cse0 (not (< 0 |divides_#in~n|)))) (and (or (not (< |divides_#in~m| 2147483647)) .cse0 (< divides_~m 2147483647)) (or (not (<= |divides_#in~m| 2147483647)) .cse0 (and (<= divides_~n divides_~m) (< 0 divides_~n) (<= divides_~m 2147483647))))) [2020-12-03 12:41:16,670 INFO L262 CegarLoopResult]: For program point L36(lines 36 38) no Hoare annotation was computed. [2020-12-03 12:41:16,671 INFO L262 CegarLoopResult]: For program point L39-3(line 39) no Hoare annotation was computed. [2020-12-03 12:41:16,671 INFO L265 CegarLoopResult]: At program point dividesENTRY(lines 32 40) the Hoare annotation is: true [2020-12-03 12:41:16,671 INFO L262 CegarLoopResult]: For program point gcdEXIT(lines 17 29) no Hoare annotation was computed. [2020-12-03 12:41:16,671 INFO L262 CegarLoopResult]: For program point L25(lines 25 27) no Hoare annotation was computed. [2020-12-03 12:41:16,671 INFO L262 CegarLoopResult]: For program point gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 28) no Hoare annotation was computed. [2020-12-03 12:41:16,671 INFO L262 CegarLoopResult]: For program point gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 26) no Hoare annotation was computed. [2020-12-03 12:41:16,671 INFO L262 CegarLoopResult]: For program point gcdFINAL(lines 17 29) no Hoare annotation was computed. [2020-12-03 12:41:16,671 INFO L262 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-12-03 12:41:16,671 INFO L262 CegarLoopResult]: For program point L28-1(line 28) no Hoare annotation was computed. [2020-12-03 12:41:16,672 INFO L262 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-12-03 12:41:16,672 INFO L258 CegarLoopResult]: At program point L28-2(line 28) the Hoare annotation is: (let ((.cse0 (not (<= |gcd_#in~y1| 2147483647))) (.cse1 (not (<= |gcd_#in~y2| 2147483647)))) (and (or .cse0 (not (<= |gcd_#in~y2| 2147483646)) (<= gcd_~y2 2147483646)) (or .cse0 .cse1 (and (<= (+ gcd_~y2 gcd_~y1) 2147483647) (< 0 gcd_~y2)) (not (<= (+ |gcd_#in~y1| |gcd_#in~y2|) 2147483647))) (or .cse0 (and (<= gcd_~y1 2147483647) (<= gcd_~y1 (+ gcd_~y2 2147483646)) (< 0 gcd_~y1) (<= gcd_~y2 2147483647) (<= |gcd_#in~y1| gcd_~y1)) .cse1))) [2020-12-03 12:41:16,672 INFO L262 CegarLoopResult]: For program point gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 26) no Hoare annotation was computed. [2020-12-03 12:41:16,672 INFO L262 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-12-03 12:41:16,672 INFO L262 CegarLoopResult]: For program point L28-3(line 28) no Hoare annotation was computed. [2020-12-03 12:41:16,672 INFO L258 CegarLoopResult]: At program point L26-2(line 26) the Hoare annotation is: (let ((.cse0 (not (<= |gcd_#in~y1| 2147483647))) (.cse1 (not (<= |gcd_#in~y2| 2147483647)))) (and (or (and (<= gcd_~y1 2147483647) (<= gcd_~y1 (+ gcd_~y2 2147483646)) (<= |gcd_#in~y1| gcd_~y1) (<= gcd_~y2 2147483646)) .cse0 .cse1) (or .cse0 (and (<= (+ gcd_~y2 gcd_~y1) 2147483647) (< 0 gcd_~y2) (< 0 gcd_~y1)) .cse1 (not (<= (+ |gcd_#in~y1| |gcd_#in~y2|) 2147483647))))) [2020-12-03 12:41:16,673 INFO L265 CegarLoopResult]: At program point gcdENTRY(lines 17 29) the Hoare annotation is: true [2020-12-03 12:41:16,673 INFO L262 CegarLoopResult]: For program point L26-3(line 26) no Hoare annotation was computed. [2020-12-03 12:41:16,673 INFO L262 CegarLoopResult]: For program point gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 28) no Hoare annotation was computed. [2020-12-03 12:41:16,673 INFO L262 CegarLoopResult]: For program point L18-2(lines 17 29) no Hoare annotation was computed. [2020-12-03 12:41:16,673 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-03 12:41:16,673 INFO L258 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: (and (<= ULTIMATE.start_main_~m~0 2147483647) (<= ULTIMATE.start_main_~n~0 2147483647)) [2020-12-03 12:41:16,673 INFO L262 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-12-03 12:41:16,673 INFO L262 CegarLoopResult]: For program point L48(lines 48 50) no Hoare annotation was computed. [2020-12-03 12:41:16,673 INFO L262 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-12-03 12:41:16,674 INFO L265 CegarLoopResult]: At program point L42(lines 42 59) the Hoare annotation is: true [2020-12-03 12:41:16,674 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-03 12:41:16,674 INFO L258 CegarLoopResult]: At program point L53(line 53) the Hoare annotation is: (and (<= ULTIMATE.start_main_~m~0 2147483647) (< 0 ULTIMATE.start_main_~z~0) (<= ULTIMATE.start_main_~n~0 2147483647)) [2020-12-03 12:41:16,674 INFO L262 CegarLoopResult]: For program point L53-1(line 53) no Hoare annotation was computed. [2020-12-03 12:41:16,674 INFO L262 CegarLoopResult]: For program point L51(lines 51 58) no Hoare annotation was computed. [2020-12-03 12:41:16,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:41:16 BoogieIcfgContainer [2020-12-03 12:41:16,692 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:41:16,692 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:41:16,693 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:41:16,693 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:41:16,693 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:41:07" (3/4) ... [2020-12-03 12:41:16,696 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 12:41:16,707 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure divides [2020-12-03 12:41:16,707 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd [2020-12-03 12:41:16,716 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-12-03 12:41:16,716 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-03 12:41:16,717 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 12:41:16,717 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 12:41:16,772 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4362f0b3-2ca9-4f9c-abc2-93b896d38124/bin/utaipan/witness.graphml [2020-12-03 12:41:16,772 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:41:16,773 INFO L168 Benchmark]: Toolchain (without parser) took 9681.13 ms. Allocated memory was 113.2 MB in the beginning and 197.1 MB in the end (delta: 83.9 MB). Free memory was 87.1 MB in the beginning and 146.0 MB in the end (delta: -59.0 MB). Peak memory consumption was 25.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:41:16,773 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 113.2 MB. Free memory was 71.7 MB in the beginning and 71.6 MB in the end (delta: 63.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:41:16,774 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.90 ms. Allocated memory is still 113.2 MB. Free memory was 86.8 MB in the beginning and 87.2 MB in the end (delta: -402.2 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:41:16,774 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.67 ms. Allocated memory is still 113.2 MB. Free memory was 87.2 MB in the beginning and 86.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:41:16,775 INFO L168 Benchmark]: Boogie Preprocessor took 21.42 ms. Allocated memory is still 113.2 MB. Free memory was 86.0 MB in the beginning and 84.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:41:16,775 INFO L168 Benchmark]: RCFGBuilder took 504.86 ms. Allocated memory is still 113.2 MB. Free memory was 84.6 MB in the beginning and 65.1 MB in the end (delta: 19.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:41:16,776 INFO L168 Benchmark]: TraceAbstraction took 8766.13 ms. Allocated memory was 113.2 MB in the beginning and 197.1 MB in the end (delta: 83.9 MB). Free memory was 64.7 MB in the beginning and 149.2 MB in the end (delta: -84.4 MB). Peak memory consumption was 73.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:41:16,776 INFO L168 Benchmark]: Witness Printer took 79.45 ms. Allocated memory is still 197.1 MB. Free memory was 149.2 MB in the beginning and 146.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-03 12:41:16,779 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 113.2 MB. Free memory was 71.7 MB in the beginning and 71.6 MB in the end (delta: 63.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 262.90 ms. Allocated memory is still 113.2 MB. Free memory was 86.8 MB in the beginning and 87.2 MB in the end (delta: -402.2 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.67 ms. Allocated memory is still 113.2 MB. Free memory was 87.2 MB in the beginning and 86.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.42 ms. Allocated memory is still 113.2 MB. Free memory was 86.0 MB in the beginning and 84.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 504.86 ms. Allocated memory is still 113.2 MB. Free memory was 84.6 MB in the beginning and 65.1 MB in the end (delta: 19.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8766.13 ms. Allocated memory was 113.2 MB in the beginning and 197.1 MB in the end (delta: 83.9 MB). Free memory was 64.7 MB in the beginning and 149.2 MB in the end (delta: -84.4 MB). Peak memory consumption was 73.5 MB. Max. memory is 16.1 GB. * Witness Printer took 79.45 ms. Allocated memory is still 197.1 MB. Free memory was 149.2 MB in the beginning and 146.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 39]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 28]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 26]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 28]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 26]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.1s, OverallIterations: 11, TraceHistogramMax: 3, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 232 SDtfs, 479 SDslu, 1004 SDs, 0 SdLazy, 1650 SolverSat, 217 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 390 GetRequests, 199 SyntacticMatches, 5 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 81 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 62 PreInvPairs, 64 NumberOfFragments, 168 HoareAnnotationTreeSize, 62 FomulaSimplifications, 201 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 875 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 349 NumberOfCodeBlocks, 349 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 464 ConstructedInterpolants, 0 QuantifiedInterpolants, 43942 SizeOfPredicates, 25 NumberOfNonLiveVariables, 584 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 23 InterpolantComputations, 11 PerfectInterpolantSequences, 62/109 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...