./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.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_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c -s /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/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 0837a1e1d82be1b28ccf3514392f1b01c88a9160 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 18:39:39,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:39:39,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:39:39,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:39:39,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:39:39,575 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:39:39,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:39:39,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:39:39,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:39:39,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:39:39,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:39:39,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:39:39,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:39:39,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:39:39,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:39:39,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:39:39,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:39:39,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:39:39,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:39:39,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:39:39,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:39:39,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:39:39,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:39:39,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:39:39,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:39:39,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:39:39,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:39:39,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:39:39,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:39:39,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:39:39,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:39:39,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:39:39,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:39:39,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:39:39,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:39:39,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:39:39,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:39:39,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:39:39,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:39:39,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:39:39,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:39:39,616 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-09 18:39:39,637 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:39:39,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:39:39,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:39:39,639 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:39:39,639 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:39:39,639 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:39:39,639 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 18:39:39,639 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:39:39,640 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:39:39,640 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 18:39:39,640 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 18:39:39,640 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:39:39,640 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 18:39:39,641 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 18:39:39,641 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 18:39:39,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:39:39,642 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 18:39:39,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 18:39:39,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:39:39,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 18:39:39,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:39:39,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 18:39:39,643 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 18:39:39,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 18:39:39,643 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:39:39,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 18:39:39,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:39:39,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:39:39,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:39:39,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:39:39,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:39:39,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 18:39:39,644 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 18:39:39,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 18:39:39,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 18:39:39,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:39:39,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:39:39,645 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_23382c9c-7076-4bf0-a446-83339629694b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0837a1e1d82be1b28ccf3514392f1b01c88a9160 [2020-12-09 18:39:39,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:39:39,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:39:39,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:39:39,848 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:39:39,849 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:39:39,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2020-12-09 18:39:39,891 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/data/baec58a32/6ece225190ab47fb9c89ce4f6cf932aa/FLAGd159cfc8a [2020-12-09 18:39:40,259 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:39:40,259 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2020-12-09 18:39:40,264 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/data/baec58a32/6ece225190ab47fb9c89ce4f6cf932aa/FLAGd159cfc8a [2020-12-09 18:39:40,276 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/data/baec58a32/6ece225190ab47fb9c89ce4f6cf932aa [2020-12-09 18:39:40,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:39:40,280 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:39:40,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:39:40,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:39:40,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:39:40,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:39:40" (1/1) ... [2020-12-09 18:39:40,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5566be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:39:40, skipping insertion in model container [2020-12-09 18:39:40,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:39:40" (1/1) ... [2020-12-09 18:39:40,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:39:40,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:39:40,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:39:40,405 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:39:40,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:39:40,432 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:39:40,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:39:40 WrapperNode [2020-12-09 18:39:40,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:39:40,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:39:40,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:39:40,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:39:40,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:39:40" (1/1) ... [2020-12-09 18:39:40,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:39:40" (1/1) ... [2020-12-09 18:39:40,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:39:40,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:39:40,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:39:40,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:39:40,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:39:40" (1/1) ... [2020-12-09 18:39:40,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:39:40" (1/1) ... [2020-12-09 18:39:40,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:39:40" (1/1) ... [2020-12-09 18:39:40,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:39:40" (1/1) ... [2020-12-09 18:39:40,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:39:40" (1/1) ... [2020-12-09 18:39:40,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:39:40" (1/1) ... [2020-12-09 18:39:40,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:39:40" (1/1) ... [2020-12-09 18:39:40,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:39:40,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:39:40,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:39:40,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:39:40,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:39:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:39:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2020-12-09 18:39:40,540 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2020-12-09 18:39:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2020-12-09 18:39:40,540 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2020-12-09 18:39:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:39:40,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:39:40,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:39:40,711 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 18:39:40,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:39:40 BoogieIcfgContainer [2020-12-09 18:39:40,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:39:40,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:39:40,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:39:40,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:39:40,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:39:40" (1/3) ... [2020-12-09 18:39:40,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d59c7a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:39:40, skipping insertion in model container [2020-12-09 18:39:40,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:39:40" (2/3) ... [2020-12-09 18:39:40,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d59c7a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:39:40, skipping insertion in model container [2020-12-09 18:39:40,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:39:40" (3/3) ... [2020-12-09 18:39:40,718 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1d.c [2020-12-09 18:39:40,728 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:39:40,730 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-12-09 18:39:40,737 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-12-09 18:39:40,755 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:39:40,755 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 18:39:40,755 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:39:40,755 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:39:40,755 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:39:40,755 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:39:40,755 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:39:40,755 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:39:40,767 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-12-09 18:39:40,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 18:39:40,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:40,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:40,772 INFO L429 AbstractCegarLoop]: === Iteration 1 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:40,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:40,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1656652383, now seen corresponding path program 1 times [2020-12-09 18:39:40,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:40,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561697222] [2020-12-09 18:39:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:39:40,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561697222] [2020-12-09 18:39:40,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:40,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 18:39:40,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682317358] [2020-12-09 18:39:40,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 18:39:40,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:40,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 18:39:40,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 18:39:40,940 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 7 states. [2020-12-09 18:39:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:41,082 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2020-12-09 18:39:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 18:39:41,083 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2020-12-09 18:39:41,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:41,093 INFO L225 Difference]: With dead ends: 84 [2020-12-09 18:39:41,093 INFO L226 Difference]: Without dead ends: 79 [2020-12-09 18:39:41,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-09 18:39:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-09 18:39:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2020-12-09 18:39:41,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-09 18:39:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-12-09 18:39:41,136 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 8 [2020-12-09 18:39:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:41,136 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-12-09 18:39:41,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 18:39:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-12-09 18:39:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 18:39:41,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:41,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:41,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 18:39:41,138 INFO L429 AbstractCegarLoop]: === Iteration 2 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:41,139 INFO L82 PathProgramCache]: Analyzing trace with hash -183383641, now seen corresponding path program 1 times [2020-12-09 18:39:41,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:41,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146713699] [2020-12-09 18:39:41,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:39:41,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146713699] [2020-12-09 18:39:41,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:41,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:39:41,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699793170] [2020-12-09 18:39:41,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:39:41,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:41,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:39:41,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:39:41,158 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 3 states. [2020-12-09 18:39:41,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:41,172 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2020-12-09 18:39:41,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:39:41,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-09 18:39:41,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:41,174 INFO L225 Difference]: With dead ends: 70 [2020-12-09 18:39:41,174 INFO L226 Difference]: Without dead ends: 69 [2020-12-09 18:39:41,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:39:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-09 18:39:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-12-09 18:39:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-09 18:39:41,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2020-12-09 18:39:41,188 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 9 [2020-12-09 18:39:41,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:41,188 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2020-12-09 18:39:41,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:39:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2020-12-09 18:39:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 18:39:41,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:41,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:41,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 18:39:41,190 INFO L429 AbstractCegarLoop]: === Iteration 3 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:41,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:41,190 INFO L82 PathProgramCache]: Analyzing trace with hash -138388889, now seen corresponding path program 1 times [2020-12-09 18:39:41,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:41,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626675091] [2020-12-09 18:39:41,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:39:41,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626675091] [2020-12-09 18:39:41,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:41,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:39:41,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917274276] [2020-12-09 18:39:41,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:39:41,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:41,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:39:41,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:39:41,214 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 3 states. [2020-12-09 18:39:41,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:41,226 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-12-09 18:39:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:39:41,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-09 18:39:41,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:41,227 INFO L225 Difference]: With dead ends: 65 [2020-12-09 18:39:41,227 INFO L226 Difference]: Without dead ends: 64 [2020-12-09 18:39:41,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:39:41,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-09 18:39:41,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-09 18:39:41,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-09 18:39:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-12-09 18:39:41,239 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 11 [2020-12-09 18:39:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:41,239 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-12-09 18:39:41,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:39:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-12-09 18:39:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 18:39:41,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:41,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:41,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 18:39:41,241 INFO L429 AbstractCegarLoop]: === Iteration 4 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:41,242 INFO L82 PathProgramCache]: Analyzing trace with hash 4911801, now seen corresponding path program 1 times [2020-12-09 18:39:41,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:41,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166435693] [2020-12-09 18:39:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:39:41,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166435693] [2020-12-09 18:39:41,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:41,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:39:41,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083499355] [2020-12-09 18:39:41,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:39:41,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:41,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:39:41,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:39:41,269 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 4 states. [2020-12-09 18:39:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:41,289 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2020-12-09 18:39:41,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:39:41,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 18:39:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:41,291 INFO L225 Difference]: With dead ends: 85 [2020-12-09 18:39:41,291 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 18:39:41,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:39:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 18:39:41,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2020-12-09 18:39:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-09 18:39:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2020-12-09 18:39:41,304 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 12 [2020-12-09 18:39:41,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:41,304 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2020-12-09 18:39:41,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:39:41,304 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2020-12-09 18:39:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 18:39:41,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:41,304 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:41,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 18:39:41,305 INFO L429 AbstractCegarLoop]: === Iteration 5 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:41,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2115393736, now seen corresponding path program 1 times [2020-12-09 18:39:41,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:41,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798183226] [2020-12-09 18:39:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 18:39:41,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798183226] [2020-12-09 18:39:41,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:41,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:39:41,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527181663] [2020-12-09 18:39:41,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:39:41,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:41,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:39:41,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:39:41,328 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand 3 states. [2020-12-09 18:39:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:41,339 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2020-12-09 18:39:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:39:41,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-09 18:39:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:41,340 INFO L225 Difference]: With dead ends: 74 [2020-12-09 18:39:41,340 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 18:39:41,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:39:41,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 18:39:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-12-09 18:39:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-09 18:39:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-12-09 18:39:41,348 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 16 [2020-12-09 18:39:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:41,349 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-12-09 18:39:41,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:39:41,349 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-12-09 18:39:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 18:39:41,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:41,349 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:41,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 18:39:41,350 INFO L429 AbstractCegarLoop]: === Iteration 6 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:41,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:41,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1152696420, now seen corresponding path program 1 times [2020-12-09 18:39:41,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:41,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699687756] [2020-12-09 18:39:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 18:39:41,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699687756] [2020-12-09 18:39:41,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:41,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:39:41,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022589206] [2020-12-09 18:39:41,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:39:41,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:41,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:39:41,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:39:41,375 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 4 states. [2020-12-09 18:39:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:41,395 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2020-12-09 18:39:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:39:41,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-09 18:39:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:41,397 INFO L225 Difference]: With dead ends: 94 [2020-12-09 18:39:41,397 INFO L226 Difference]: Without dead ends: 93 [2020-12-09 18:39:41,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:39:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-09 18:39:41,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2020-12-09 18:39:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-09 18:39:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-12-09 18:39:41,411 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 17 [2020-12-09 18:39:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:41,411 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-12-09 18:39:41,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:39:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-12-09 18:39:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 18:39:41,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:41,412 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:41,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 18:39:41,413 INFO L429 AbstractCegarLoop]: === Iteration 7 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:41,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:41,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1079409517, now seen corresponding path program 1 times [2020-12-09 18:39:41,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:41,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619039730] [2020-12-09 18:39:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:39:41,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619039730] [2020-12-09 18:39:41,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:41,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 18:39:41,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114297457] [2020-12-09 18:39:41,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:39:41,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:41,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:39:41,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:39:41,446 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 5 states. [2020-12-09 18:39:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:41,486 INFO L93 Difference]: Finished difference Result 125 states and 159 transitions. [2020-12-09 18:39:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:39:41,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-12-09 18:39:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:41,487 INFO L225 Difference]: With dead ends: 125 [2020-12-09 18:39:41,488 INFO L226 Difference]: Without dead ends: 75 [2020-12-09 18:39:41,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:39:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-09 18:39:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-12-09 18:39:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-09 18:39:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2020-12-09 18:39:41,500 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 19 [2020-12-09 18:39:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:41,501 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2020-12-09 18:39:41,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:39:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2020-12-09 18:39:41,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 18:39:41,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:41,502 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:41,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 18:39:41,503 INFO L429 AbstractCegarLoop]: === Iteration 8 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:41,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:41,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1643853139, now seen corresponding path program 1 times [2020-12-09 18:39:41,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:41,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224346161] [2020-12-09 18:39:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 18:39:41,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224346161] [2020-12-09 18:39:41,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:41,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 18:39:41,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030136765] [2020-12-09 18:39:41,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 18:39:41,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:41,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 18:39:41,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:39:41,541 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 6 states. [2020-12-09 18:39:41,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:41,585 INFO L93 Difference]: Finished difference Result 149 states and 206 transitions. [2020-12-09 18:39:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 18:39:41,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-09 18:39:41,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:41,587 INFO L225 Difference]: With dead ends: 149 [2020-12-09 18:39:41,587 INFO L226 Difference]: Without dead ends: 91 [2020-12-09 18:39:41,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-09 18:39:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-09 18:39:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-12-09 18:39:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-09 18:39:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2020-12-09 18:39:41,596 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 21 [2020-12-09 18:39:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:41,596 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2020-12-09 18:39:41,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 18:39:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2020-12-09 18:39:41,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 18:39:41,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:41,597 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:41,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 18:39:41,598 INFO L429 AbstractCegarLoop]: === Iteration 9 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:41,598 INFO L82 PathProgramCache]: Analyzing trace with hash 883505486, now seen corresponding path program 1 times [2020-12-09 18:39:41,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:41,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436620454] [2020-12-09 18:39:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 18:39:41,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436620454] [2020-12-09 18:39:41,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:41,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 18:39:41,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422552567] [2020-12-09 18:39:41,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 18:39:41,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:41,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 18:39:41,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:39:41,627 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 6 states. [2020-12-09 18:39:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:41,670 INFO L93 Difference]: Finished difference Result 158 states and 210 transitions. [2020-12-09 18:39:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 18:39:41,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-09 18:39:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:41,671 INFO L225 Difference]: With dead ends: 158 [2020-12-09 18:39:41,671 INFO L226 Difference]: Without dead ends: 95 [2020-12-09 18:39:41,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-09 18:39:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-09 18:39:41,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-12-09 18:39:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-09 18:39:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2020-12-09 18:39:41,683 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 27 [2020-12-09 18:39:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:41,683 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2020-12-09 18:39:41,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 18:39:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2020-12-09 18:39:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 18:39:41,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:41,684 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:41,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 18:39:41,684 INFO L429 AbstractCegarLoop]: === Iteration 10 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:41,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:41,685 INFO L82 PathProgramCache]: Analyzing trace with hash 952008726, now seen corresponding path program 1 times [2020-12-09 18:39:41,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:41,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014723055] [2020-12-09 18:39:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-09 18:39:41,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014723055] [2020-12-09 18:39:41,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:41,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:39:41,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432391302] [2020-12-09 18:39:41,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:39:41,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:41,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:39:41,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:39:41,713 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 4 states. [2020-12-09 18:39:41,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:41,728 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2020-12-09 18:39:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:39:41,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-12-09 18:39:41,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:41,729 INFO L225 Difference]: With dead ends: 94 [2020-12-09 18:39:41,729 INFO L226 Difference]: Without dead ends: 93 [2020-12-09 18:39:41,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:39:41,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-09 18:39:41,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2020-12-09 18:39:41,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-09 18:39:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-12-09 18:39:41,738 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 30 [2020-12-09 18:39:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:41,739 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-12-09 18:39:41,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:39:41,739 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-12-09 18:39:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-09 18:39:41,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:41,740 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:41,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 18:39:41,740 INFO L429 AbstractCegarLoop]: === Iteration 11 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:41,741 INFO L82 PathProgramCache]: Analyzing trace with hash -552500514, now seen corresponding path program 1 times [2020-12-09 18:39:41,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:41,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626207837] [2020-12-09 18:39:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-09 18:39:41,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626207837] [2020-12-09 18:39:41,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:41,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:39:41,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623071806] [2020-12-09 18:39:41,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:39:41,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:41,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:39:41,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:39:41,762 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 3 states. [2020-12-09 18:39:41,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:41,771 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-12-09 18:39:41,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:39:41,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-12-09 18:39:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:41,773 INFO L225 Difference]: With dead ends: 91 [2020-12-09 18:39:41,773 INFO L226 Difference]: Without dead ends: 90 [2020-12-09 18:39:41,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:39:41,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-09 18:39:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-09 18:39:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-09 18:39:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2020-12-09 18:39:41,781 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 31 [2020-12-09 18:39:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:41,781 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2020-12-09 18:39:41,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:39:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2020-12-09 18:39:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-09 18:39:41,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:41,783 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:41,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 18:39:41,783 INFO L429 AbstractCegarLoop]: === Iteration 12 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:41,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1111626321, now seen corresponding path program 1 times [2020-12-09 18:39:41,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:41,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27147970] [2020-12-09 18:39:41,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-09 18:39:41,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27147970] [2020-12-09 18:39:41,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:41,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 18:39:41,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935301676] [2020-12-09 18:39:41,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 18:39:41,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:41,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 18:39:41,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:39:41,822 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand 6 states. [2020-12-09 18:39:41,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:41,858 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2020-12-09 18:39:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 18:39:41,858 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-09 18:39:41,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:41,859 INFO L225 Difference]: With dead ends: 100 [2020-12-09 18:39:41,860 INFO L226 Difference]: Without dead ends: 99 [2020-12-09 18:39:41,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-09 18:39:41,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-09 18:39:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2020-12-09 18:39:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-09 18:39:41,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-12-09 18:39:41,868 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 46 [2020-12-09 18:39:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:41,868 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-12-09 18:39:41,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 18:39:41,868 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-12-09 18:39:41,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-09 18:39:41,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:41,869 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:41,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-09 18:39:41,870 INFO L429 AbstractCegarLoop]: === Iteration 13 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:41,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:41,870 INFO L82 PathProgramCache]: Analyzing trace with hash 930510463, now seen corresponding path program 1 times [2020-12-09 18:39:41,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:41,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85212462] [2020-12-09 18:39:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-09 18:39:41,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85212462] [2020-12-09 18:39:41,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:41,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 18:39:41,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557775975] [2020-12-09 18:39:41,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 18:39:41,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:41,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 18:39:41,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:39:41,905 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 6 states. [2020-12-09 18:39:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:41,928 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2020-12-09 18:39:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 18:39:41,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-12-09 18:39:41,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:41,929 INFO L225 Difference]: With dead ends: 89 [2020-12-09 18:39:41,929 INFO L226 Difference]: Without dead ends: 88 [2020-12-09 18:39:41,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:39:41,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-09 18:39:41,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-09 18:39:41,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-09 18:39:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2020-12-09 18:39:41,937 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 36 [2020-12-09 18:39:41,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:41,937 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2020-12-09 18:39:41,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 18:39:41,937 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2020-12-09 18:39:41,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-09 18:39:41,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:41,938 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:41,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-09 18:39:41,939 INFO L429 AbstractCegarLoop]: === Iteration 14 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:41,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:41,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1401145536, now seen corresponding path program 1 times [2020-12-09 18:39:41,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:41,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186011130] [2020-12-09 18:39:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-09 18:39:41,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186011130] [2020-12-09 18:39:41,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783247318] [2020-12-09 18:39:41,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:39:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:42,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 18:39:42,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:39:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-09 18:39:42,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:39:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-09 18:39:42,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1432100187] [2020-12-09 18:39:42,314 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2020-12-09 18:39:42,314 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:39:42,319 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 18:39:42,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:39:42,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2020-12-09 18:39:42,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552131891] [2020-12-09 18:39:42,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 18:39:42,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:42,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 18:39:42,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-12-09 18:39:42,321 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand 14 states. [2020-12-09 18:39:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:42,510 INFO L93 Difference]: Finished difference Result 199 states and 245 transitions. [2020-12-09 18:39:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 18:39:42,511 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-12-09 18:39:42,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:42,512 INFO L225 Difference]: With dead ends: 199 [2020-12-09 18:39:42,512 INFO L226 Difference]: Without dead ends: 123 [2020-12-09 18:39:42,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-12-09 18:39:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-09 18:39:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2020-12-09 18:39:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-09 18:39:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2020-12-09 18:39:42,519 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 50 [2020-12-09 18:39:42,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:42,519 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2020-12-09 18:39:42,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 18:39:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2020-12-09 18:39:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-09 18:39:42,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:42,520 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:42,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-09 18:39:42,721 INFO L429 AbstractCegarLoop]: === Iteration 15 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:42,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:42,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1156205799, now seen corresponding path program 1 times [2020-12-09 18:39:42,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:42,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523670528] [2020-12-09 18:39:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-09 18:39:42,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523670528] [2020-12-09 18:39:42,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731203705] [2020-12-09 18:39:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:39:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 18:39:42,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:39:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-09 18:39:42,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:39:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-09 18:39:42,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1997192736] [2020-12-09 18:39:42,894 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2020-12-09 18:39:42,894 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:39:42,895 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 18:39:42,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:39:42,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2020-12-09 18:39:42,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409390990] [2020-12-09 18:39:42,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 18:39:42,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:42,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 18:39:42,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-09 18:39:42,900 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 8 states. [2020-12-09 18:39:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:42,931 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2020-12-09 18:39:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 18:39:42,932 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-12-09 18:39:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:42,933 INFO L225 Difference]: With dead ends: 118 [2020-12-09 18:39:42,933 INFO L226 Difference]: Without dead ends: 60 [2020-12-09 18:39:42,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-09 18:39:42,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-09 18:39:42,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-12-09 18:39:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 18:39:42,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-12-09 18:39:42,938 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 43 [2020-12-09 18:39:42,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:42,939 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-12-09 18:39:42,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 18:39:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-12-09 18:39:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-09 18:39:42,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:42,940 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:43,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-09 18:39:43,141 INFO L429 AbstractCegarLoop]: === Iteration 16 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:43,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:43,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1154921966, now seen corresponding path program 1 times [2020-12-09 18:39:43,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:43,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027206473] [2020-12-09 18:39:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-09 18:39:43,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027206473] [2020-12-09 18:39:43,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:43,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:39:43,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731420746] [2020-12-09 18:39:43,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:39:43,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:43,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:39:43,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:39:43,205 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 3 states. [2020-12-09 18:39:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:43,221 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-12-09 18:39:43,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:39:43,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-09 18:39:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:43,226 INFO L225 Difference]: With dead ends: 58 [2020-12-09 18:39:43,226 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 18:39:43,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:39:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 18:39:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-09 18:39:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-09 18:39:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-12-09 18:39:43,245 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 43 [2020-12-09 18:39:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:43,246 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-12-09 18:39:43,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:39:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-12-09 18:39:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-09 18:39:43,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:39:43,250 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:39:43,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-09 18:39:43,250 INFO L429 AbstractCegarLoop]: === Iteration 17 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 18:39:43,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:39:43,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1442842648, now seen corresponding path program 1 times [2020-12-09 18:39:43,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:39:43,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050200983] [2020-12-09 18:39:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:39:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:39:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-09 18:39:43,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050200983] [2020-12-09 18:39:43,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:39:43,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:39:43,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510634536] [2020-12-09 18:39:43,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:39:43,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:39:43,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:39:43,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:39:43,307 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 4 states. [2020-12-09 18:39:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:39:43,313 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-12-09 18:39:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:39:43,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-12-09 18:39:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:39:43,314 INFO L225 Difference]: With dead ends: 57 [2020-12-09 18:39:43,314 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 18:39:43,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:39:43,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 18:39:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 18:39:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 18:39:43,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 18:39:43,315 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2020-12-09 18:39:43,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:39:43,315 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 18:39:43,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:39:43,316 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 18:39:43,316 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 18:39:43,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-09 18:39:43,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 18:39:43,537 INFO L262 CegarLoopResult]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,537 INFO L262 CegarLoopResult]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2020-12-09 18:39:43,537 INFO L262 CegarLoopResult]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,537 INFO L262 CegarLoopResult]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2020-12-09 18:39:43,537 INFO L262 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,538 INFO L265 CegarLoopResult]: At program point rec1ENTRY(lines 11 15) the Hoare annotation is: true [2020-12-09 18:39:43,538 INFO L262 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,538 INFO L262 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2020-12-09 18:39:43,538 INFO L258 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: (and (or (not (<= |rec1_#in~i| 2147483647)) (and (<= |rec1_#in~i| rec1_~i) (<= rec1_~i 2147483647))) (not (<= |rec1_#in~i| 0))) [2020-12-09 18:39:43,538 INFO L262 CegarLoopResult]: For program point L14-3(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,538 INFO L262 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,538 INFO L262 CegarLoopResult]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,538 INFO L262 CegarLoopResult]: For program point L14-5(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,538 INFO L258 CegarLoopResult]: At program point L14-6(line 14) the Hoare annotation is: (and (or (not (<= |rec1_#in~i| 2147483647)) (and (<= |rec1_#t~ret0| 1) (<= |rec1_#in~i| rec1_~i) (<= rec1_~i 2147483647))) (not (<= |rec1_#in~i| 0))) [2020-12-09 18:39:43,539 INFO L262 CegarLoopResult]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,539 INFO L262 CegarLoopResult]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,539 INFO L262 CegarLoopResult]: For program point L14-7(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,539 INFO L262 CegarLoopResult]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,539 INFO L258 CegarLoopResult]: At program point L14-8(line 14) the Hoare annotation is: (and (or (not (<= |rec1_#in~i| 2147483647)) (and (<= |rec1_#t~ret0| 1) (<= |rec1_#in~i| rec1_~i) (<= rec1_~i 2147483647) (<= |rec1_#t~ret1| 0))) (not (<= |rec1_#in~i| 0))) [2020-12-09 18:39:43,539 INFO L262 CegarLoopResult]: For program point L14-9(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,539 INFO L262 CegarLoopResult]: For program point L14-10(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,539 INFO L262 CegarLoopResult]: For program point L14-11(line 14) no Hoare annotation was computed. [2020-12-09 18:39:43,539 INFO L262 CegarLoopResult]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-09 18:39:43,539 INFO L262 CegarLoopResult]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2020-12-09 18:39:43,539 INFO L262 CegarLoopResult]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2020-12-09 18:39:43,540 INFO L258 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (or (not (<= |rec2_#in~j| 2147483647)) (and (<= rec2_~j 2147483647) (<= 1 rec2_~j))) (not (<= |rec2_#in~j| 0))) [2020-12-09 18:39:43,540 INFO L262 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-12-09 18:39:43,540 INFO L262 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-12-09 18:39:43,540 INFO L262 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-12-09 18:39:43,540 INFO L262 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-12-09 18:39:43,540 INFO L258 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (and (or (not (<= |rec2_#in~j| 2147483647)) (and (<= |rec2_#t~ret3| 1) (<= rec2_~j 2147483647) (<= 1 rec2_~j) (<= 1 |rec2_#t~ret3|))) (not (<= |rec2_#in~j| 0))) [2020-12-09 18:39:43,540 INFO L262 CegarLoopResult]: For program point L20-5(line 20) no Hoare annotation was computed. [2020-12-09 18:39:43,540 INFO L262 CegarLoopResult]: For program point L20-6(line 20) no Hoare annotation was computed. [2020-12-09 18:39:43,540 INFO L262 CegarLoopResult]: For program point L20-7(line 20) no Hoare annotation was computed. [2020-12-09 18:39:43,540 INFO L265 CegarLoopResult]: At program point rec2ENTRY(lines 17 21) the Hoare annotation is: true [2020-12-09 18:39:43,540 INFO L262 CegarLoopResult]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-09 18:39:43,540 INFO L262 CegarLoopResult]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-09 18:39:43,540 INFO L262 CegarLoopResult]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-09 18:39:43,541 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 18:39:43,541 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 18:39:43,541 INFO L258 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2020-12-09 18:39:43,541 INFO L262 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-12-09 18:39:43,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:39:43 BoogieIcfgContainer [2020-12-09 18:39:43,544 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:39:43,545 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:39:43,545 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:39:43,545 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:39:43,545 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:39:40" (3/4) ... [2020-12-09 18:39:43,547 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 18:39:43,551 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2020-12-09 18:39:43,551 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2020-12-09 18:39:43,556 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-09 18:39:43,556 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 18:39:43,557 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 18:39:43,589 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_23382c9c-7076-4bf0-a446-83339629694b/bin/utaipan/witness.graphml [2020-12-09 18:39:43,589 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:39:43,590 INFO L168 Benchmark]: Toolchain (without parser) took 3309.52 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 66.6 MB in the beginning and 91.0 MB in the end (delta: -24.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:39:43,591 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 102.8 MB. Free memory was 82.8 MB in the beginning and 82.7 MB in the end (delta: 78.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:39:43,591 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.94 ms. Allocated memory is still 102.8 MB. Free memory was 66.4 MB in the beginning and 80.4 MB in the end (delta: -14.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 18:39:43,591 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.23 ms. Allocated memory is still 102.8 MB. Free memory was 80.4 MB in the beginning and 79.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:39:43,592 INFO L168 Benchmark]: Boogie Preprocessor took 15.61 ms. Allocated memory is still 102.8 MB. Free memory was 79.2 MB in the beginning and 78.4 MB in the end (delta: 778.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:39:43,592 INFO L168 Benchmark]: RCFGBuilder took 241.38 ms. Allocated memory is still 102.8 MB. Free memory was 78.4 MB in the beginning and 64.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 18:39:43,593 INFO L168 Benchmark]: TraceAbstraction took 2830.67 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 64.5 MB in the beginning and 94.1 MB in the end (delta: -29.6 MB). Peak memory consumption was 58.0 MB. Max. memory is 16.1 GB. [2020-12-09 18:39:43,593 INFO L168 Benchmark]: Witness Printer took 44.21 ms. Allocated memory is still 123.7 MB. Free memory was 94.1 MB in the beginning and 91.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:39:43,595 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 102.8 MB. Free memory was 82.8 MB in the beginning and 82.7 MB in the end (delta: 78.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 150.94 ms. Allocated memory is still 102.8 MB. Free memory was 66.4 MB in the beginning and 80.4 MB in the end (delta: -14.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 21.23 ms. Allocated memory is still 102.8 MB. Free memory was 80.4 MB in the beginning and 79.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.61 ms. Allocated memory is still 102.8 MB. Free memory was 79.2 MB in the beginning and 78.4 MB in the end (delta: 778.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 241.38 ms. Allocated memory is still 102.8 MB. Free memory was 78.4 MB in the beginning and 64.9 MB in the end (delta: 13.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2830.67 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 64.5 MB in the beginning and 94.1 MB in the end (delta: -29.6 MB). Peak memory consumption was 58.0 MB. Max. memory is 16.1 GB. * Witness Printer took 44.21 ms. Allocated memory is still 123.7 MB. Free memory was 94.1 MB in the beginning and 91.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 42 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 17, TraceHistogramMax: 7, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 658 SDtfs, 203 SDslu, 1574 SDs, 0 SdLazy, 533 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 273 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=14, 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, 17 MinimizatonAttempts, 101 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 194 PreInvPairs, 201 NumberOfFragments, 105 HoareAnnotationTreeSize, 194 FomulaSimplifications, 557 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 252 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 556 NumberOfCodeBlocks, 556 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 628 ConstructedInterpolants, 0 QuantifiedInterpolants, 34730 SizeOfPredicates, 2 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 21 InterpolantComputations, 15 PerfectInterpolantSequences, 503/515 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...