./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 94b61e96441ca10668b436b4ef10dfd9464f0863 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 21:18:56,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 21:18:56,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 21:18:56,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 21:18:56,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 21:18:56,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 21:18:56,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 21:18:56,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 21:18:56,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 21:18:56,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 21:18:56,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 21:18:56,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 21:18:56,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 21:18:56,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 21:18:56,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 21:18:56,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 21:18:56,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 21:18:56,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 21:18:56,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 21:18:56,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 21:18:56,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 21:18:56,826 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 21:18:56,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 21:18:56,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 21:18:56,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 21:18:56,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 21:18:56,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 21:18:56,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 21:18:56,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 21:18:56,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 21:18:56,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 21:18:56,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 21:18:56,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 21:18:56,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 21:18:56,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 21:18:56,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 21:18:56,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 21:18:56,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 21:18:56,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 21:18:56,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 21:18:56,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 21:18:56,835 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-12-07 21:18:56,845 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 21:18:56,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 21:18:56,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 21:18:56,846 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 21:18:56,846 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 21:18:56,846 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 21:18:56,846 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 21:18:56,846 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 21:18:56,846 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 21:18:56,846 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 21:18:56,847 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 21:18:56,847 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 21:18:56,847 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 21:18:56,847 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 21:18:56,847 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 21:18:56,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 21:18:56,848 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 21:18:56,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 21:18:56,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 21:18:56,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 21:18:56,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 21:18:56,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 21:18:56,848 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-12-07 21:18:56,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 21:18:56,849 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 21:18:56,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 21:18:56,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 21:18:56,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 21:18:56,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 21:18:56,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 21:18:56,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 21:18:56,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 21:18:56,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 21:18:56,850 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 21:18:56,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 21:18:56,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 21:18:56,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 21:18:56,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 21:18:56,850 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_9f26cc2c-513f-494c-9fed-7e5af11a6287/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94b61e96441ca10668b436b4ef10dfd9464f0863 [2019-12-07 21:18:56,949 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 21:18:56,957 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 21:18:56,959 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 21:18:56,960 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 21:18:56,960 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 21:18:56,961 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/bin/utaipan/../../sv-benchmarks/c/termination-crafted/NonTermination4.c [2019-12-07 21:18:56,998 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/bin/utaipan/data/2efc86b63/c7e016f86087432388df84f7e32aced0/FLAGd1a3be08d [2019-12-07 21:18:57,441 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 21:18:57,442 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/sv-benchmarks/c/termination-crafted/NonTermination4.c [2019-12-07 21:18:57,445 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/bin/utaipan/data/2efc86b63/c7e016f86087432388df84f7e32aced0/FLAGd1a3be08d [2019-12-07 21:18:57,453 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/bin/utaipan/data/2efc86b63/c7e016f86087432388df84f7e32aced0 [2019-12-07 21:18:57,455 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 21:18:57,456 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 21:18:57,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 21:18:57,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 21:18:57,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 21:18:57,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:18:57" (1/1) ... [2019-12-07 21:18:57,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c8857b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:18:57, skipping insertion in model container [2019-12-07 21:18:57,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 09:18:57" (1/1) ... [2019-12-07 21:18:57,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 21:18:57,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 21:18:57,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:18:57,572 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 21:18:57,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 21:18:57,621 INFO L208 MainTranslator]: Completed translation [2019-12-07 21:18:57,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:18:57 WrapperNode [2019-12-07 21:18:57,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 21:18:57,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 21:18:57,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 21:18:57,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 21:18:57,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:18:57" (1/1) ... [2019-12-07 21:18:57,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:18:57" (1/1) ... [2019-12-07 21:18:57,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 21:18:57,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 21:18:57,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 21:18:57,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 21:18:57,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:18:57" (1/1) ... [2019-12-07 21:18:57,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:18:57" (1/1) ... [2019-12-07 21:18:57,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:18:57" (1/1) ... [2019-12-07 21:18:57,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:18:57" (1/1) ... [2019-12-07 21:18:57,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:18:57" (1/1) ... [2019-12-07 21:18:57,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:18:57" (1/1) ... [2019-12-07 21:18:57,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:18:57" (1/1) ... [2019-12-07 21:18:57,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 21:18:57,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 21:18:57,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 21:18:57,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 21:18:57,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:18:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/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 [2019-12-07 21:18:57,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 21:18:57,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 21:18:57,796 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 21:18:57,797 INFO L287 CfgBuilder]: Removed 5 assume(true) statements. [2019-12-07 21:18:57,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:18:57 BoogieIcfgContainer [2019-12-07 21:18:57,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 21:18:57,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 21:18:57,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 21:18:57,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 21:18:57,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 09:18:57" (1/3) ... [2019-12-07 21:18:57,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1eb723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:18:57, skipping insertion in model container [2019-12-07 21:18:57,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 09:18:57" (2/3) ... [2019-12-07 21:18:57,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1eb723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 09:18:57, skipping insertion in model container [2019-12-07 21:18:57,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:18:57" (3/3) ... [2019-12-07 21:18:57,802 INFO L109 eAbstractionObserver]: Analyzing ICFG NonTermination4.c [2019-12-07 21:18:57,809 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 21:18:57,813 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-12-07 21:18:57,820 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-12-07 21:18:57,834 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 21:18:57,834 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 21:18:57,834 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 21:18:57,834 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 21:18:57,835 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 21:18:57,835 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 21:18:57,835 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 21:18:57,835 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 21:18:57,844 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-12-07 21:18:57,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 21:18:57,847 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:18:57,848 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 21:18:57,848 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:18:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:18:57,851 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2019-12-07 21:18:57,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:18:57,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345097473] [2019-12-07 21:18:57,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:18:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:18:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:57,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345097473] [2019-12-07 21:18:57,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:18:57,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 21:18:57,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798412131] [2019-12-07 21:18:57,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:18:57,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:18:57,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:18:57,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:18:57,955 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-12-07 21:18:57,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:18:57,981 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-12-07 21:18:57,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:18:57,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-12-07 21:18:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:18:57,988 INFO L225 Difference]: With dead ends: 15 [2019-12-07 21:18:57,989 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 21:18:57,990 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:18:58,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 21:18:58,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-12-07 21:18:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 21:18:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-12-07 21:18:58,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2019-12-07 21:18:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:18:58,012 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-12-07 21:18:58,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:18:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-12-07 21:18:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 21:18:58,012 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:18:58,012 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 21:18:58,013 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:18:58,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:18:58,013 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2019-12-07 21:18:58,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:18:58,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961161485] [2019-12-07 21:18:58,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:18:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:18:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:58,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961161485] [2019-12-07 21:18:58,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:18:58,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 21:18:58,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699768129] [2019-12-07 21:18:58,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:18:58,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:18:58,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:18:58,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:18:58,027 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2019-12-07 21:18:58,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:18:58,035 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-12-07 21:18:58,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:18:58,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 21:18:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:18:58,036 INFO L225 Difference]: With dead ends: 12 [2019-12-07 21:18:58,036 INFO L226 Difference]: Without dead ends: 11 [2019-12-07 21:18:58,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:18:58,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-12-07 21:18:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-12-07 21:18:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 21:18:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-12-07 21:18:58,039 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2019-12-07 21:18:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:18:58,039 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-12-07 21:18:58,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:18:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-12-07 21:18:58,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 21:18:58,039 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:18:58,040 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 21:18:58,040 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:18:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:18:58,040 INFO L82 PathProgramCache]: Analyzing trace with hash 29862563, now seen corresponding path program 1 times [2019-12-07 21:18:58,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:18:58,040 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520289199] [2019-12-07 21:18:58,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:18:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:18:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:58,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520289199] [2019-12-07 21:18:58,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:18:58,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 21:18:58,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698847702] [2019-12-07 21:18:58,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:18:58,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:18:58,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:18:58,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:18:58,055 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 3 states. [2019-12-07 21:18:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:18:58,065 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-12-07 21:18:58,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:18:58,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-07 21:18:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:18:58,066 INFO L225 Difference]: With dead ends: 15 [2019-12-07 21:18:58,066 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 21:18:58,066 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:18:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 21:18:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2019-12-07 21:18:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-12-07 21:18:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-12-07 21:18:58,069 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 5 [2019-12-07 21:18:58,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:18:58,069 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-12-07 21:18:58,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:18:58,069 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-12-07 21:18:58,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 21:18:58,069 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:18:58,069 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 21:18:58,069 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:18:58,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:18:58,070 INFO L82 PathProgramCache]: Analyzing trace with hash 925739501, now seen corresponding path program 1 times [2019-12-07 21:18:58,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:18:58,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895372908] [2019-12-07 21:18:58,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:18:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:18:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:58,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895372908] [2019-12-07 21:18:58,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 21:18:58,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 21:18:58,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620737005] [2019-12-07 21:18:58,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 21:18:58,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:18:58,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 21:18:58,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:18:58,083 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2019-12-07 21:18:58,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:18:58,089 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-12-07 21:18:58,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 21:18:58,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-12-07 21:18:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:18:58,090 INFO L225 Difference]: With dead ends: 13 [2019-12-07 21:18:58,090 INFO L226 Difference]: Without dead ends: 12 [2019-12-07 21:18:58,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 21:18:58,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-12-07 21:18:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-12-07 21:18:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-12-07 21:18:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-12-07 21:18:58,092 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 6 [2019-12-07 21:18:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:18:58,092 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-12-07 21:18:58,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 21:18:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-12-07 21:18:58,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 21:18:58,093 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:18:58,093 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-07 21:18:58,093 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:18:58,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:18:58,093 INFO L82 PathProgramCache]: Analyzing trace with hash 577431471, now seen corresponding path program 1 times [2019-12-07 21:18:58,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:18:58,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248647706] [2019-12-07 21:18:58,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:18:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:18:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:58,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248647706] [2019-12-07 21:18:58,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484488635] [2019-12-07 21:18:58,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/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 [2019-12-07 21:18:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:18:58,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 21:18:58,138 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:18:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:58,160 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:18:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:58,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [839821102] [2019-12-07 21:18:58,188 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 21:18:58,188 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:18:58,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:18:58,196 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:18:58,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:18:58,320 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:18:58,452 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 21:18:58,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:18:58,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2019-12-07 21:18:58,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59890099] [2019-12-07 21:18:58,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 21:18:58,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:18:58,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 21:18:58,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-07 21:18:58,453 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2019-12-07 21:18:58,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:18:58,477 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-12-07 21:18:58,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 21:18:58,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-12-07 21:18:58,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:18:58,477 INFO L225 Difference]: With dead ends: 28 [2019-12-07 21:18:58,478 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 21:18:58,478 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-07 21:18:58,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 21:18:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-12-07 21:18:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-07 21:18:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-12-07 21:18:58,481 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 8 [2019-12-07 21:18:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:18:58,481 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-12-07 21:18:58,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 21:18:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-12-07 21:18:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 21:18:58,482 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:18:58,482 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2019-12-07 21:18:58,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:18:58,684 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:18:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:18:58,684 INFO L82 PathProgramCache]: Analyzing trace with hash 860863857, now seen corresponding path program 1 times [2019-12-07 21:18:58,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:18:58,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925334982] [2019-12-07 21:18:58,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:18:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:18:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:58,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925334982] [2019-12-07 21:18:58,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103266361] [2019-12-07 21:18:58,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/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 [2019-12-07 21:18:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:18:58,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 21:18:58,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:18:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:58,812 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:18:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:58,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [497888662] [2019-12-07 21:18:58,855 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 21:18:58,856 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:18:58,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:18:58,857 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:18:58,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:18:58,914 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:18:59,004 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 21:18:59,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:18:59,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2019-12-07 21:18:59,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631701095] [2019-12-07 21:18:59,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 21:18:59,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:18:59,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 21:18:59,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-07 21:18:59,006 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2019-12-07 21:18:59,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:18:59,021 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2019-12-07 21:18:59,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 21:18:59,022 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-07 21:18:59,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:18:59,022 INFO L225 Difference]: With dead ends: 28 [2019-12-07 21:18:59,022 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 21:18:59,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-07 21:18:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 21:18:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-12-07 21:18:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-07 21:18:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-12-07 21:18:59,026 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 10 [2019-12-07 21:18:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:18:59,027 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-12-07 21:18:59,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 21:18:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-12-07 21:18:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 21:18:59,027 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:18:59,028 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1] [2019-12-07 21:18:59,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:18:59,229 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:18:59,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:18:59,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1492388577, now seen corresponding path program 2 times [2019-12-07 21:18:59,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:18:59,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791107274] [2019-12-07 21:18:59,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:18:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:18:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:59,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791107274] [2019-12-07 21:18:59,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527117523] [2019-12-07 21:18:59,296 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/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 [2019-12-07 21:18:59,313 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 21:18:59,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:18:59,314 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 21:18:59,315 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:18:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:59,335 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:18:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:59,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1406880929] [2019-12-07 21:18:59,375 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 21:18:59,375 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:18:59,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:18:59,376 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:18:59,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:18:59,429 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:18:59,576 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 21:18:59,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:18:59,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2019-12-07 21:18:59,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595165531] [2019-12-07 21:18:59,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 21:18:59,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:18:59,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 21:18:59,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-12-07 21:18:59,578 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 12 states. [2019-12-07 21:18:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:18:59,627 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2019-12-07 21:18:59,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 21:18:59,628 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-12-07 21:18:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:18:59,629 INFO L225 Difference]: With dead ends: 61 [2019-12-07 21:18:59,629 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 21:18:59,630 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-12-07 21:18:59,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 21:18:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-12-07 21:18:59,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-07 21:18:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2019-12-07 21:18:59,637 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 23 [2019-12-07 21:18:59,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:18:59,637 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2019-12-07 21:18:59,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 21:18:59,638 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2019-12-07 21:18:59,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-07 21:18:59,638 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:18:59,638 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1] [2019-12-07 21:18:59,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:18:59,839 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:18:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:18:59,840 INFO L82 PathProgramCache]: Analyzing trace with hash -333652957, now seen corresponding path program 2 times [2019-12-07 21:18:59,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:18:59,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780216492] [2019-12-07 21:18:59,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:18:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:18:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:59,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780216492] [2019-12-07 21:18:59,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792134344] [2019-12-07 21:18:59,881 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/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 [2019-12-07 21:18:59,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 21:18:59,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:18:59,899 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 21:18:59,900 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:18:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:59,922 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:18:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:18:59,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1228461074] [2019-12-07 21:18:59,965 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 21:18:59,965 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:18:59,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:18:59,966 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:18:59,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:19:00,003 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:19:00,088 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 21:19:00,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:19:00,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2019-12-07 21:19:00,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557896895] [2019-12-07 21:19:00,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 21:19:00,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:19:00,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 21:19:00,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-07 21:19:00,089 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 12 states. [2019-12-07 21:19:00,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:19:00,119 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2019-12-07 21:19:00,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 21:19:00,119 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2019-12-07 21:19:00,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:19:00,120 INFO L225 Difference]: With dead ends: 58 [2019-12-07 21:19:00,120 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 21:19:00,121 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-12-07 21:19:00,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 21:19:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-12-07 21:19:00,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-07 21:19:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-12-07 21:19:00,126 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 25 [2019-12-07 21:19:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:19:00,126 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-12-07 21:19:00,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 21:19:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-12-07 21:19:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-12-07 21:19:00,128 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:19:00,128 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1] [2019-12-07 21:19:00,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:19:00,329 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:19:00,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:19:00,330 INFO L82 PathProgramCache]: Analyzing trace with hash -390144735, now seen corresponding path program 3 times [2019-12-07 21:19:00,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:19:00,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717817648] [2019-12-07 21:19:00,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:19:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:19:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:19:00,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717817648] [2019-12-07 21:19:00,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967542957] [2019-12-07 21:19:00,454 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/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 [2019-12-07 21:19:00,477 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 21:19:00,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:19:00,478 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 21:19:00,479 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:19:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:19:00,560 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:19:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:19:00,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [692495791] [2019-12-07 21:19:00,706 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 21:19:00,706 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:19:00,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:19:00,706 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:19:00,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:19:00,737 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:19:00,867 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 21:19:00,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:19:00,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2019-12-07 21:19:00,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460104474] [2019-12-07 21:19:00,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 21:19:00,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:19:00,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 21:19:00,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2019-12-07 21:19:00,869 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 24 states. [2019-12-07 21:19:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:19:00,953 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2019-12-07 21:19:00,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 21:19:00,954 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2019-12-07 21:19:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:19:00,955 INFO L225 Difference]: With dead ends: 127 [2019-12-07 21:19:00,955 INFO L226 Difference]: Without dead ends: 126 [2019-12-07 21:19:00,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 131 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2019-12-07 21:19:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-12-07 21:19:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2019-12-07 21:19:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-07 21:19:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2019-12-07 21:19:00,962 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 53 [2019-12-07 21:19:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:19:00,962 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2019-12-07 21:19:00,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 21:19:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2019-12-07 21:19:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-12-07 21:19:00,963 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:19:00,964 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1] [2019-12-07 21:19:01,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:19:01,164 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:19:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:19:01,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1266934173, now seen corresponding path program 3 times [2019-12-07 21:19:01,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:19:01,165 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255003917] [2019-12-07 21:19:01,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:19:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 21:19:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:19:01,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255003917] [2019-12-07 21:19:01,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712690257] [2019-12-07 21:19:01,252 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/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 [2019-12-07 21:19:01,273 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 21:19:01,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 21:19:01,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 21:19:01,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 21:19:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:19:01,350 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 21:19:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 21:19:01,471 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467335] [2019-12-07 21:19:01,471 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 21:19:01,472 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 21:19:01,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 21:19:01,472 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 21:19:01,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 21:19:01,502 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 21:19:01,592 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 21:19:01,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 21:19:01,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2019-12-07 21:19:01,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340893215] [2019-12-07 21:19:01,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 21:19:01,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 21:19:01,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 21:19:01,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2019-12-07 21:19:01,593 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 24 states. [2019-12-07 21:19:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 21:19:01,634 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2019-12-07 21:19:01,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-07 21:19:01,635 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2019-12-07 21:19:01,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 21:19:01,636 INFO L225 Difference]: With dead ends: 116 [2019-12-07 21:19:01,636 INFO L226 Difference]: Without dead ends: 115 [2019-12-07 21:19:01,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 138 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2019-12-07 21:19:01,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-12-07 21:19:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-12-07 21:19:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-12-07 21:19:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2019-12-07 21:19:01,644 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 55 [2019-12-07 21:19:01,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 21:19:01,644 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2019-12-07 21:19:01,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 21:19:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2019-12-07 21:19:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-12-07 21:19:01,646 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 21:19:01,646 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1] [2019-12-07 21:19:01,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 21:19:01,848 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-12-07 21:19:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 21:19:01,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1391435441, now seen corresponding path program 4 times [2019-12-07 21:19:01,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 21:19:01,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726677538] [2019-12-07 21:19:01,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 21:19:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 21:19:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 21:19:01,935 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 21:19:01,935 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 21:19:01,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 09:19:01 BoogieIcfgContainer [2019-12-07 21:19:01,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 21:19:01,964 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 21:19:01,964 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 21:19:01,965 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 21:19:01,965 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 09:18:57" (3/4) ... [2019-12-07 21:19:01,967 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 21:19:02,018 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9f26cc2c-513f-494c-9fed-7e5af11a6287/bin/utaipan/witness.graphml [2019-12-07 21:19:02,018 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 21:19:02,020 INFO L168 Benchmark]: Toolchain (without parser) took 4563.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.0 MB). Free memory was 943.5 MB in the beginning and 948.1 MB in the end (delta: -4.6 MB). Peak memory consumption was 190.4 MB. Max. memory is 11.5 GB. [2019-12-07 21:19:02,021 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:19:02,021 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.20 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -159.6 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. [2019-12-07 21:19:02,021 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.14 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:19:02,021 INFO L168 Benchmark]: Boogie Preprocessor took 11.39 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 21:19:02,022 INFO L168 Benchmark]: RCFGBuilder took 144.59 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. [2019-12-07 21:19:02,022 INFO L168 Benchmark]: TraceAbstraction took 4165.94 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 82.3 MB). Free memory was 1.1 GB in the beginning and 951.0 MB in the end (delta: 137.5 MB). Peak memory consumption was 219.8 MB. Max. memory is 11.5 GB. [2019-12-07 21:19:02,022 INFO L168 Benchmark]: Witness Printer took 54.30 ms. Allocated memory is still 1.2 GB. Free memory was 951.0 MB in the beginning and 948.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 11.5 GB. [2019-12-07 21:19:02,024 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 165.20 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -159.6 MB). Peak memory consumption was 24.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.14 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.39 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 144.59 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4165.94 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 82.3 MB). Free memory was 1.1 GB in the beginning and 951.0 MB in the end (delta: 137.5 MB). Peak memory consumption was 219.8 MB. Max. memory is 11.5 GB. * Witness Printer took 54.30 ms. Allocated memory is still 1.2 GB. Free memory was 951.0 MB in the beginning and 948.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: integer overflow possible integer overflow possible We found a FailurePath: [L15] int x, y; [L16] x = 1 [L17] y = 1 [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] 3*y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. Result: UNSAFE, OverallTime: 4.1s, OverallIterations: 11, TraceHistogramMax: 20, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 156 SDslu, 234 SDs, 0 SdLazy, 233 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 550 GetRequests, 417 SyntacticMatches, 30 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 466 NumberOfCodeBlocks, 466 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 518 ConstructedInterpolants, 0 QuantifiedInterpolants, 75072 SizeOfPredicates, 0 NumberOfNonLiveVariables, 330 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/1800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...