./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 94b61e96441ca10668b436b4ef10dfd9464f0863 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:34:21,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:34:21,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:34:21,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:34:21,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:34:21,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:34:21,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:34:21,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:34:21,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:34:21,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:34:21,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:34:21,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:34:21,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:34:21,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:34:21,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:34:21,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:34:21,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:34:21,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:34:21,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:34:21,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:34:21,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:34:21,604 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:34:21,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:34:21,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:34:21,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:34:21,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:34:21,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:34:21,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:34:21,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:34:21,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:34:21,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:34:21,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:34:21,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:34:21,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:34:21,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:34:21,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:34:21,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:34:21,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:34:21,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:34:21,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:34:21,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:34:21,624 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-03 12:34:21,652 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:34:21,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:34:21,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:34:21,653 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:34:21,654 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:34:21,654 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:34:21,654 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:34:21,654 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:34:21,654 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:34:21,655 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:34:21,655 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:34:21,655 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:34:21,655 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:34:21,656 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:34:21,656 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:34:21,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:34:21,657 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:34:21,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:34:21,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:34:21,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:34:21,658 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:34:21,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:34:21,658 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-03 12:34:21,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:34:21,658 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:34:21,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:34:21,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:34:21,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:34:21,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:34:21,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:34:21,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:34:21,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:34:21,660 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:34:21,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:34:21,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:34:21,665 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:34:21,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:34:21,667 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94b61e96441ca10668b436b4ef10dfd9464f0863 [2020-12-03 12:34:21,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:34:21,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:34:21,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:34:21,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:34:21,949 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:34:21,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/../../sv-benchmarks/c/termination-crafted/NonTermination4.c [2020-12-03 12:34:22,035 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/data/c1da0961d/770e74a9a2cd40e087e839cd742076e9/FLAGbdecff250 [2020-12-03 12:34:22,493 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:34:22,494 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/sv-benchmarks/c/termination-crafted/NonTermination4.c [2020-12-03 12:34:22,500 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/data/c1da0961d/770e74a9a2cd40e087e839cd742076e9/FLAGbdecff250 [2020-12-03 12:34:22,861 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/data/c1da0961d/770e74a9a2cd40e087e839cd742076e9 [2020-12-03 12:34:22,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:34:22,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:34:22,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:34:22,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:34:22,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:34:22,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:34:22" (1/1) ... [2020-12-03 12:34:22,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76199239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:34:22, skipping insertion in model container [2020-12-03 12:34:22,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:34:22" (1/1) ... [2020-12-03 12:34:22,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:34:22,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:34:23,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:34:23,053 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:34:23,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:34:23,104 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:34:23,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:34:23 WrapperNode [2020-12-03 12:34:23,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:34:23,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:34:23,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:34:23,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:34:23,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:34:23" (1/1) ... [2020-12-03 12:34:23,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:34:23" (1/1) ... [2020-12-03 12:34:23,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:34:23,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:34:23,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:34:23,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:34:23,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:34:23" (1/1) ... [2020-12-03 12:34:23,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:34:23" (1/1) ... [2020-12-03 12:34:23,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:34:23" (1/1) ... [2020-12-03 12:34:23,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:34:23" (1/1) ... [2020-12-03 12:34:23,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:34:23" (1/1) ... [2020-12-03 12:34:23,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:34:23" (1/1) ... [2020-12-03 12:34:23,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:34:23" (1/1) ... [2020-12-03 12:34:23,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:34:23,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:34:23,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:34:23,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:34:23,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:34:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:34:23,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:34:23,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:34:23,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:34:23,456 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-03 12:34:23,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:34:23 BoogieIcfgContainer [2020-12-03 12:34:23,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:34:23,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:34:23,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:34:23,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:34:23,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:34:22" (1/3) ... [2020-12-03 12:34:23,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c75ad53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:34:23, skipping insertion in model container [2020-12-03 12:34:23,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:34:23" (2/3) ... [2020-12-03 12:34:23,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c75ad53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:34:23, skipping insertion in model container [2020-12-03 12:34:23,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:34:23" (3/3) ... [2020-12-03 12:34:23,468 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTermination4.c [2020-12-03 12:34:23,484 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:34:23,488 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-03 12:34:23,501 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-03 12:34:23,529 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:34:23,529 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:34:23,530 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:34:23,530 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:34:23,530 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:34:23,530 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:34:23,530 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:34:23,530 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:34:23,546 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-03 12:34:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-03 12:34:23,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:34:23,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-03 12:34:23,552 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:34:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:34:23,559 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-12-03 12:34:23,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:34:23,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705377286] [2020-12-03 12:34:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:34:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:34:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:23,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705377286] [2020-12-03 12:34:23,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:34:23,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:34:23,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895085923] [2020-12-03 12:34:23,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:34:23,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:34:23,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:34:23,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:34:23,731 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-12-03 12:34:23,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:34:23,802 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-12-03 12:34:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:34:23,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-03 12:34:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:34:23,825 INFO L225 Difference]: With dead ends: 15 [2020-12-03 12:34:23,825 INFO L226 Difference]: Without dead ends: 13 [2020-12-03 12:34:23,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:34:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-03 12:34:23,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-12-03 12:34:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-03 12:34:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-03 12:34:23,900 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 3 [2020-12-03 12:34:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:34:23,900 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-03 12:34:23,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:34:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-03 12:34:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:34:23,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:34:23,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:34:23,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:34:23,902 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:34:23,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:34:23,903 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2020-12-03 12:34:23,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:34:23,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364927995] [2020-12-03 12:34:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:34:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:34:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:23,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364927995] [2020-12-03 12:34:23,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:34:23,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:34:23,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038186622] [2020-12-03 12:34:23,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:34:23,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:34:23,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:34:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:34:23,927 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2020-12-03 12:34:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:34:23,939 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-12-03 12:34:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:34:23,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-03 12:34:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:34:23,940 INFO L225 Difference]: With dead ends: 12 [2020-12-03 12:34:23,940 INFO L226 Difference]: Without dead ends: 11 [2020-12-03 12:34:23,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:34:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-03 12:34:23,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-03 12:34:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-03 12:34:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-03 12:34:23,945 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2020-12-03 12:34:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:34:23,945 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-03 12:34:23,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:34:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-03 12:34:23,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:34:23,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:34:23,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:34:23,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:34:23,947 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:34:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:34:23,948 INFO L82 PathProgramCache]: Analyzing trace with hash 29862563, now seen corresponding path program 1 times [2020-12-03 12:34:23,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:34:23,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993736383] [2020-12-03 12:34:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:34:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:34:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:23,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993736383] [2020-12-03 12:34:23,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:34:23,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:34:23,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902162535] [2020-12-03 12:34:23,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:34:23,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:34:23,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:34:23,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:34:23,985 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 3 states. [2020-12-03 12:34:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:34:24,018 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-12-03 12:34:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:34:24,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-03 12:34:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:34:24,020 INFO L225 Difference]: With dead ends: 15 [2020-12-03 12:34:24,020 INFO L226 Difference]: Without dead ends: 14 [2020-12-03 12:34:24,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:34:24,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-03 12:34:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-03 12:34:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-03 12:34:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-03 12:34:24,024 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 5 [2020-12-03 12:34:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:34:24,024 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-03 12:34:24,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:34:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-03 12:34:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 12:34:24,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:34:24,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 12:34:24,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:34:24,025 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:34:24,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:34:24,026 INFO L82 PathProgramCache]: Analyzing trace with hash 925739501, now seen corresponding path program 1 times [2020-12-03 12:34:24,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:34:24,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900043801] [2020-12-03 12:34:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:34:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:34:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:24,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900043801] [2020-12-03 12:34:24,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:34:24,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:34:24,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006689579] [2020-12-03 12:34:24,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:34:24,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:34:24,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:34:24,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:34:24,073 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2020-12-03 12:34:24,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:34:24,090 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-03 12:34:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:34:24,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-03 12:34:24,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:34:24,092 INFO L225 Difference]: With dead ends: 13 [2020-12-03 12:34:24,093 INFO L226 Difference]: Without dead ends: 12 [2020-12-03 12:34:24,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:34:24,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-03 12:34:24,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-03 12:34:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-03 12:34:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-03 12:34:24,105 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 6 [2020-12-03 12:34:24,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:34:24,106 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-03 12:34:24,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:34:24,107 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-03 12:34:24,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:34:24,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:34:24,108 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-03 12:34:24,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 12:34:24,109 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:34:24,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:34:24,110 INFO L82 PathProgramCache]: Analyzing trace with hash 577431471, now seen corresponding path program 1 times [2020-12-03 12:34:24,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:34:24,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368099341] [2020-12-03 12:34:24,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:34:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:34:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:24,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368099341] [2020-12-03 12:34:24,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892646977] [2020-12-03 12:34:24,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:34:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:34:24,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 12:34:24,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:34:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:24,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:34:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:24,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1436034970] [2020-12-03 12:34:24,371 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:34:24,371 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:34:24,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:34:24,380 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:34:24,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:34:24,724 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:34:24,950 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:34:24,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:34:24,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-03 12:34:24,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706067137] [2020-12-03 12:34:24,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:34:24,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:34:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:34:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:34:24,953 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-12-03 12:34:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:34:25,005 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-03 12:34:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:34:25,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-03 12:34:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:34:25,007 INFO L225 Difference]: With dead ends: 28 [2020-12-03 12:34:25,007 INFO L226 Difference]: Without dead ends: 27 [2020-12-03 12:34:25,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:34:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-03 12:34:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-12-03 12:34:25,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-03 12:34:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-03 12:34:25,021 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 8 [2020-12-03 12:34:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:34:25,021 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-03 12:34:25,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:34:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-03 12:34:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:34:25,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:34:25,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-12-03 12:34:25,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:34:25,230 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:34:25,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:34:25,231 INFO L82 PathProgramCache]: Analyzing trace with hash 860863857, now seen corresponding path program 1 times [2020-12-03 12:34:25,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:34:25,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296856917] [2020-12-03 12:34:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:34:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:34:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:25,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296856917] [2020-12-03 12:34:25,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547371421] [2020-12-03 12:34:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-12-03 12:34:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:34:25,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 12:34:25,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:34:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:25,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:34:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:25,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1986385088] [2020-12-03 12:34:25,367 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:34:25,368 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:34:25,368 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:34:25,368 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:34:25,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:34:25,491 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:34:25,633 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:34:25,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:34:25,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-03 12:34:25,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473914855] [2020-12-03 12:34:25,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:34:25,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:34:25,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:34:25,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:34:25,647 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-12-03 12:34:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:34:25,681 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-03 12:34:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:34:25,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-03 12:34:25,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:34:25,682 INFO L225 Difference]: With dead ends: 28 [2020-12-03 12:34:25,683 INFO L226 Difference]: Without dead ends: 27 [2020-12-03 12:34:25,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:34:25,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-03 12:34:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-03 12:34:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-03 12:34:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-03 12:34:25,689 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 10 [2020-12-03 12:34:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:34:25,689 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-03 12:34:25,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:34:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-03 12:34:25,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-03 12:34:25,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:34:25,690 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1] [2020-12-03 12:34:25,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-03 12:34:25,904 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:34:25,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:34:25,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1492388577, now seen corresponding path program 2 times [2020-12-03 12:34:25,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:34:25,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929743137] [2020-12-03 12:34:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:34:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:34:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:25,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929743137] [2020-12-03 12:34:25,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314400092] [2020-12-03 12:34:25,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:34:26,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-03 12:34:26,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:34:26,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:34:26,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:34:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:26,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:34:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:26,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219744285] [2020-12-03 12:34:26,300 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:34:26,300 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:34:26,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:34:26,301 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:34:26,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:34:26,437 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:34:26,640 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:34:26,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:34:26,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-12-03 12:34:26,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877864981] [2020-12-03 12:34:26,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:34:26,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:34:26,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:34:26,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-03 12:34:26,643 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 12 states. [2020-12-03 12:34:26,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:34:26,724 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-12-03 12:34:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-03 12:34:26,725 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-12-03 12:34:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:34:26,726 INFO L225 Difference]: With dead ends: 61 [2020-12-03 12:34:26,726 INFO L226 Difference]: Without dead ends: 60 [2020-12-03 12:34:26,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-03 12:34:26,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-03 12:34:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-12-03 12:34:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-03 12:34:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-12-03 12:34:26,736 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 23 [2020-12-03 12:34:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:34:26,736 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-12-03 12:34:26,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:34:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-12-03 12:34:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-03 12:34:26,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:34:26,737 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1] [2020-12-03 12:34:26,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-03 12:34:26,945 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:34:26,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:34:26,946 INFO L82 PathProgramCache]: Analyzing trace with hash -333652957, now seen corresponding path program 2 times [2020-12-03 12:34:26,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:34:26,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871932259] [2020-12-03 12:34:26,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:34:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:34:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:27,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871932259] [2020-12-03 12:34:27,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747481561] [2020-12-03 12:34:27,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:34:27,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-03 12:34:27,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:34:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:34:27,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:34:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:27,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:34:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:27,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [251989688] [2020-12-03 12:34:27,250 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:34:27,250 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:34:27,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:34:27,251 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:34:27,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:34:27,326 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:34:27,509 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:34:27,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:34:27,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-12-03 12:34:27,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884621896] [2020-12-03 12:34:27,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:34:27,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:34:27,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:34:27,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-12-03 12:34:27,512 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 12 states. [2020-12-03 12:34:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:34:27,599 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-12-03 12:34:27,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-03 12:34:27,600 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-12-03 12:34:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:34:27,601 INFO L225 Difference]: With dead ends: 58 [2020-12-03 12:34:27,601 INFO L226 Difference]: Without dead ends: 57 [2020-12-03 12:34:27,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-12-03 12:34:27,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-03 12:34:27,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-03 12:34:27,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-03 12:34:27,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-03 12:34:27,622 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 25 [2020-12-03 12:34:27,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:34:27,623 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-03 12:34:27,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:34:27,623 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-03 12:34:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-03 12:34:27,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:34:27,625 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1] [2020-12-03 12:34:27,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:34:27,849 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:34:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:34:27,849 INFO L82 PathProgramCache]: Analyzing trace with hash -390144735, now seen corresponding path program 3 times [2020-12-03 12:34:27,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:34:27,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733706127] [2020-12-03 12:34:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:34:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:34:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:28,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733706127] [2020-12-03 12:34:28,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696058727] [2020-12-03 12:34:28,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:34:28,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-03 12:34:28,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:34:28,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-03 12:34:28,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:34:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:28,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:34:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:28,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809006173] [2020-12-03 12:34:28,636 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:34:28,636 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:34:28,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:34:28,637 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:34:28,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:34:28,699 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:34:28,946 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:34:28,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:34:28,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-12-03 12:34:28,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034303514] [2020-12-03 12:34:28,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-03 12:34:28,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:34:28,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-03 12:34:28,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-12-03 12:34:28,952 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 24 states. [2020-12-03 12:34:29,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:34:29,124 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2020-12-03 12:34:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-03 12:34:29,125 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-12-03 12:34:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:34:29,130 INFO L225 Difference]: With dead ends: 127 [2020-12-03 12:34:29,130 INFO L226 Difference]: Without dead ends: 126 [2020-12-03 12:34:29,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 131 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-12-03 12:34:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-03 12:34:29,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2020-12-03 12:34:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-03 12:34:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2020-12-03 12:34:29,161 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 53 [2020-12-03 12:34:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:34:29,163 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2020-12-03 12:34:29,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-03 12:34:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2020-12-03 12:34:29,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-03 12:34:29,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:34:29,168 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1] [2020-12-03 12:34:29,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:34:29,393 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:34:29,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:34:29,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1266934173, now seen corresponding path program 3 times [2020-12-03 12:34:29,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:34:29,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822398449] [2020-12-03 12:34:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:34:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:34:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:29,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822398449] [2020-12-03 12:34:29,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035615290] [2020-12-03 12:34:29,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:34:29,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-03 12:34:29,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:34:29,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-03 12:34:29,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:34:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:29,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:34:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:34:30,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [239672187] [2020-12-03 12:34:30,073 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:34:30,073 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:34:30,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:34:30,073 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:34:30,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:34:30,143 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:34:30,327 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:34:30,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:34:30,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-12-03 12:34:30,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071572747] [2020-12-03 12:34:30,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-03 12:34:30,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:34:30,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-03 12:34:30,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-12-03 12:34:30,330 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 24 states. [2020-12-03 12:34:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:34:30,444 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-12-03 12:34:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-03 12:34:30,444 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-12-03 12:34:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:34:30,445 INFO L225 Difference]: With dead ends: 116 [2020-12-03 12:34:30,445 INFO L226 Difference]: Without dead ends: 115 [2020-12-03 12:34:30,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 138 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-12-03 12:34:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-03 12:34:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-12-03 12:34:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-03 12:34:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-12-03 12:34:30,469 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 55 [2020-12-03 12:34:30,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:34:30,471 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-12-03 12:34:30,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-03 12:34:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-12-03 12:34:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-03 12:34:30,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:34:30,474 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1] [2020-12-03 12:34:30,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:34:30,701 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:34:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:34:30,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1391435441, now seen corresponding path program 4 times [2020-12-03 12:34:30,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:34:30,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942077019] [2020-12-03 12:34:30,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:34:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:34:30,756 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:34:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:34:30,801 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:34:30,827 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:34:30,827 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:34:30,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2020-12-03 12:34:30,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:34:30 BoogieIcfgContainer [2020-12-03 12:34:30,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:34:30,859 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:34:30,859 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:34:30,859 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:34:30,860 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:34:23" (3/4) ... [2020-12-03 12:34:30,862 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 12:34:30,930 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fe261ea1-0874-4e0d-a3ad-da1709a07bdc/bin/utaipan/witness.graphml [2020-12-03 12:34:30,931 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:34:30,933 INFO L168 Benchmark]: Toolchain (without parser) took 8066.71 ms. Allocated memory was 83.9 MB in the beginning and 157.3 MB in the end (delta: 73.4 MB). Free memory was 54.2 MB in the beginning and 99.4 MB in the end (delta: -45.2 MB). Peak memory consumption was 27.9 MB. Max. memory is 16.1 GB. [2020-12-03 12:34:30,933 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 83.9 MB. Free memory was 40.9 MB in the beginning and 40.8 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:34:30,934 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.45 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 53.9 MB in the beginning and 83.3 MB in the end (delta: -29.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:34:30,935 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.85 ms. Allocated memory is still 104.9 MB. Free memory was 83.3 MB in the beginning and 81.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:34:30,935 INFO L168 Benchmark]: Boogie Preprocessor took 23.42 ms. Allocated memory is still 104.9 MB. Free memory was 81.9 MB in the beginning and 81.0 MB in the end (delta: 872.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:34:30,936 INFO L168 Benchmark]: RCFGBuilder took 280.51 ms. Allocated memory is still 104.9 MB. Free memory was 81.0 MB in the beginning and 71.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:34:30,936 INFO L168 Benchmark]: TraceAbstraction took 7398.22 ms. Allocated memory was 104.9 MB in the beginning and 157.3 MB in the end (delta: 52.4 MB). Free memory was 70.6 MB in the beginning and 102.6 MB in the end (delta: -32.0 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. [2020-12-03 12:34:30,937 INFO L168 Benchmark]: Witness Printer took 71.84 ms. Allocated memory is still 157.3 MB. Free memory was 102.6 MB in the beginning and 99.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-03 12:34:30,945 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 83.9 MB. Free memory was 40.9 MB in the beginning and 40.8 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 224.45 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 53.9 MB in the beginning and 83.3 MB in the end (delta: -29.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.85 ms. Allocated memory is still 104.9 MB. Free memory was 83.3 MB in the beginning and 81.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.42 ms. Allocated memory is still 104.9 MB. Free memory was 81.9 MB in the beginning and 81.0 MB in the end (delta: 872.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 280.51 ms. Allocated memory is still 104.9 MB. Free memory was 81.0 MB in the beginning and 71.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7398.22 ms. Allocated memory was 104.9 MB in the beginning and 157.3 MB in the end (delta: 52.4 MB). Free memory was 70.6 MB in the beginning and 102.6 MB in the end (delta: -32.0 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. * Witness Printer took 71.84 ms. Allocated memory is still 157.3 MB. Free memory was 102.6 MB in the beginning and 99.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: integer overflow possible integer overflow possible We found a FailurePath: [L15] int x, y; [L16] x = 1 [L17] y = 1 [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] EXPR 3*y [L20] y = 3*y [L18] COND TRUE x >= 0 [L19] EXPR 2*x [L19] x = 2*x [L20] 3*y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.3s, OverallIterations: 11, TraceHistogramMax: 20, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 156 SDslu, 234 SDs, 0 SdLazy, 233 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 550 GetRequests, 417 SyntacticMatches, 30 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2.3s 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: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 466 NumberOfCodeBlocks, 466 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 518 ConstructedInterpolants, 0 QuantifiedInterpolants, 75072 SizeOfPredicates, 0 NumberOfNonLiveVariables, 330 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/1800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...