./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_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI --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 [2021-10-11 02:27:23,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:27:23,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:27:23,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:27:23,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:27:23,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:27:23,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:27:23,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:27:23,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:27:23,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:27:23,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:27:23,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:27:23,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:27:23,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:27:23,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:27:23,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:27:23,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:27:23,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:27:23,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:27:23,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:27:23,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:27:23,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:27:23,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:27:23,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:27:23,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:27:23,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:27:23,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:27:23,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:27:23,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:27:23,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:27:23,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:27:23,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:27:23,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:27:23,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:27:23,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:27:23,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:27:23,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:27:23,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:27:23,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:27:23,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:27:23,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:27:23,825 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-10-11 02:27:23,868 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:27:23,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:27:23,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:27:23,870 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:27:23,870 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:27:23,871 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:27:23,871 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:27:23,871 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:27:23,878 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:27:23,878 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:27:23,879 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:27:23,880 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:27:23,880 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:27:23,880 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:27:23,880 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:27:23,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:27:23,881 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:27:23,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:27:23,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:27:23,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:27:23,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:27:23,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:27:23,883 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-11 02:27:23,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:27:23,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:27:23,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:27:23,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:27:23,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:27:23,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:27:23,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:27:23,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:27:23,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:27:23,885 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:27:23,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:27:23,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:27:23,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:27:23,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:27:23,886 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_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0837a1e1d82be1b28ccf3514392f1b01c88a9160 [2021-10-11 02:27:24,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:27:24,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:27:24,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:27:24,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:27:24,171 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:27:24,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2021-10-11 02:27:24,250 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/data/ec20de6ed/a92e343e36e740c28b2eaf3bbbb18ae9/FLAG713301751 [2021-10-11 02:27:24,730 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:27:24,731 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2021-10-11 02:27:24,739 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/data/ec20de6ed/a92e343e36e740c28b2eaf3bbbb18ae9/FLAG713301751 [2021-10-11 02:27:25,109 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/data/ec20de6ed/a92e343e36e740c28b2eaf3bbbb18ae9 [2021-10-11 02:27:25,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:27:25,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:27:25,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:25,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:27:25,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:27:25,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:25" (1/1) ... [2021-10-11 02:27:25,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11152097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:25, skipping insertion in model container [2021-10-11 02:27:25,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:25" (1/1) ... [2021-10-11 02:27:25,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:27:25,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:27:25,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:25,350 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:27:25,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:25,377 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:27:25,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:25 WrapperNode [2021-10-11 02:27:25,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:25,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:25,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:27:25,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:27:25,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:25" (1/1) ... [2021-10-11 02:27:25,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:25" (1/1) ... [2021-10-11 02:27:25,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:25,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:27:25,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:27:25,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:27:25,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:25" (1/1) ... [2021-10-11 02:27:25,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:25" (1/1) ... [2021-10-11 02:27:25,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:25" (1/1) ... [2021-10-11 02:27:25,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:25" (1/1) ... [2021-10-11 02:27:25,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:25" (1/1) ... [2021-10-11 02:27:25,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:25" (1/1) ... [2021-10-11 02:27:25,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:25" (1/1) ... [2021-10-11 02:27:25,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:27:25,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:27:25,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:27:25,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:27:25,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:25" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:27:25,523 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2021-10-11 02:27:25,523 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2021-10-11 02:27:25,523 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2021-10-11 02:27:25,524 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2021-10-11 02:27:25,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:27:25,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:27:25,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:27:25,731 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-11 02:27:25,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:25 BoogieIcfgContainer [2021-10-11 02:27:25,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:27:25,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:27:25,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:27:25,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:27:25,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:27:25" (1/3) ... [2021-10-11 02:27:25,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378a46f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:25, skipping insertion in model container [2021-10-11 02:27:25,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:25" (2/3) ... [2021-10-11 02:27:25,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378a46f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:25, skipping insertion in model container [2021-10-11 02:27:25,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:25" (3/3) ... [2021-10-11 02:27:25,744 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1d.c [2021-10-11 02:27:25,757 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:27:25,759 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2021-10-11 02:27:25,771 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-11 02:27:25,798 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:27:25,798 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:27:25,798 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:27:25,798 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:27:25,799 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:27:25,799 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:27:25,799 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:27:25,799 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:27:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-10-11 02:27:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:27:25,822 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:25,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:25,823 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]=== [2021-10-11 02:27:25,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1656652383, now seen corresponding path program 1 times [2021-10-11 02:27:25,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:25,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267127520] [2021-10-11 02:27:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:26,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267127520] [2021-10-11 02:27:26,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:26,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:27:26,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010326202] [2021-10-11 02:27:26,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:27:26,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:26,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:27:26,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:27:26,070 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 7 states. [2021-10-11 02:27:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:26,400 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2021-10-11 02:27:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:27:26,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2021-10-11 02:27:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:26,413 INFO L225 Difference]: With dead ends: 84 [2021-10-11 02:27:26,414 INFO L226 Difference]: Without dead ends: 79 [2021-10-11 02:27:26,417 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 [2021-10-11 02:27:26,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-11 02:27:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2021-10-11 02:27:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-10-11 02:27:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2021-10-11 02:27:26,474 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 8 [2021-10-11 02:27:26,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:26,475 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2021-10-11 02:27:26,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:27:26,476 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2021-10-11 02:27:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:27:26,477 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:26,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:26,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:27:26,478 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]=== [2021-10-11 02:27:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:26,479 INFO L82 PathProgramCache]: Analyzing trace with hash -183383641, now seen corresponding path program 1 times [2021-10-11 02:27:26,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:26,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326811572] [2021-10-11 02:27:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:26,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326811572] [2021-10-11 02:27:26,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:26,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:26,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294188018] [2021-10-11 02:27:26,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:26,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:26,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:26,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:26,507 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 3 states. [2021-10-11 02:27:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:26,526 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2021-10-11 02:27:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:26,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-10-11 02:27:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:26,536 INFO L225 Difference]: With dead ends: 70 [2021-10-11 02:27:26,536 INFO L226 Difference]: Without dead ends: 69 [2021-10-11 02:27:26,537 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 [2021-10-11 02:27:26,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-11 02:27:26,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2021-10-11 02:27:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-10-11 02:27:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2021-10-11 02:27:26,554 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 9 [2021-10-11 02:27:26,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:26,555 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2021-10-11 02:27:26,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:26,555 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2021-10-11 02:27:26,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:27:26,556 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:26,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:26,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:27:26,556 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]=== [2021-10-11 02:27:26,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:26,561 INFO L82 PathProgramCache]: Analyzing trace with hash -138388889, now seen corresponding path program 1 times [2021-10-11 02:27:26,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:26,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643279573] [2021-10-11 02:27:26,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:26,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643279573] [2021-10-11 02:27:26,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:26,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:26,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415233549] [2021-10-11 02:27:26,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:26,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:26,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:26,587 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 3 states. [2021-10-11 02:27:26,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:26,602 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2021-10-11 02:27:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:26,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-10-11 02:27:26,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:26,605 INFO L225 Difference]: With dead ends: 65 [2021-10-11 02:27:26,605 INFO L226 Difference]: Without dead ends: 64 [2021-10-11 02:27:26,606 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 [2021-10-11 02:27:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-11 02:27:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-11 02:27:26,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-10-11 02:27:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2021-10-11 02:27:26,620 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 11 [2021-10-11 02:27:26,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:26,620 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2021-10-11 02:27:26,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2021-10-11 02:27:26,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:27:26,621 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:26,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:26,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:27:26,622 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]=== [2021-10-11 02:27:26,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:26,623 INFO L82 PathProgramCache]: Analyzing trace with hash 4911801, now seen corresponding path program 1 times [2021-10-11 02:27:26,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:26,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603212260] [2021-10-11 02:27:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:26,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603212260] [2021-10-11 02:27:26,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:26,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:26,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604826393] [2021-10-11 02:27:26,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:26,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:26,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:26,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:26,659 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 4 states. [2021-10-11 02:27:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:26,686 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2021-10-11 02:27:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:27:26,686 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-10-11 02:27:26,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:26,688 INFO L225 Difference]: With dead ends: 85 [2021-10-11 02:27:26,688 INFO L226 Difference]: Without dead ends: 84 [2021-10-11 02:27:26,689 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 [2021-10-11 02:27:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-11 02:27:26,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-10-11 02:27:26,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-10-11 02:27:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2021-10-11 02:27:26,708 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 12 [2021-10-11 02:27:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:26,708 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2021-10-11 02:27:26,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2021-10-11 02:27:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:27:26,710 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:26,710 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:26,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:27:26,711 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]=== [2021-10-11 02:27:26,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:26,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2115393736, now seen corresponding path program 1 times [2021-10-11 02:27:26,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:26,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485296974] [2021-10-11 02:27:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:27:26,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485296974] [2021-10-11 02:27:26,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:26,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:26,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617877084] [2021-10-11 02:27:26,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:26,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:26,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:26,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:26,752 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand 3 states. [2021-10-11 02:27:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:26,769 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2021-10-11 02:27:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:26,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2021-10-11 02:27:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:26,771 INFO L225 Difference]: With dead ends: 74 [2021-10-11 02:27:26,771 INFO L226 Difference]: Without dead ends: 73 [2021-10-11 02:27:26,772 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 [2021-10-11 02:27:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-11 02:27:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-10-11 02:27:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-10-11 02:27:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2021-10-11 02:27:26,786 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 16 [2021-10-11 02:27:26,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:26,786 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2021-10-11 02:27:26,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:26,787 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2021-10-11 02:27:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:27:26,788 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:26,788 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:26,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:27:26,788 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]=== [2021-10-11 02:27:26,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:26,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1152696420, now seen corresponding path program 1 times [2021-10-11 02:27:26,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:26,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459724144] [2021-10-11 02:27:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:27:26,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459724144] [2021-10-11 02:27:26,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:26,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:26,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2458601] [2021-10-11 02:27:26,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:26,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:26,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:26,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:26,858 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 4 states. [2021-10-11 02:27:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:26,895 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2021-10-11 02:27:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:27:26,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-10-11 02:27:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:26,900 INFO L225 Difference]: With dead ends: 94 [2021-10-11 02:27:26,901 INFO L226 Difference]: Without dead ends: 93 [2021-10-11 02:27:26,901 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 [2021-10-11 02:27:26,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-11 02:27:26,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2021-10-11 02:27:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-10-11 02:27:26,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2021-10-11 02:27:26,927 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 17 [2021-10-11 02:27:26,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:26,927 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2021-10-11 02:27:26,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:26,927 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2021-10-11 02:27:26,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 02:27:26,928 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:26,929 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:26,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:27:26,929 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]=== [2021-10-11 02:27:26,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:26,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1079409517, now seen corresponding path program 1 times [2021-10-11 02:27:26,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:26,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892688915] [2021-10-11 02:27:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:27,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892688915] [2021-10-11 02:27:27,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:27,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:27:27,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896774677] [2021-10-11 02:27:27,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:27:27,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:27,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:27:27,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:27:27,031 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 5 states. [2021-10-11 02:27:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:27,126 INFO L93 Difference]: Finished difference Result 125 states and 159 transitions. [2021-10-11 02:27:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:27:27,127 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2021-10-11 02:27:27,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:27,130 INFO L225 Difference]: With dead ends: 125 [2021-10-11 02:27:27,131 INFO L226 Difference]: Without dead ends: 75 [2021-10-11 02:27:27,135 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 [2021-10-11 02:27:27,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-11 02:27:27,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-10-11 02:27:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-10-11 02:27:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2021-10-11 02:27:27,159 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 19 [2021-10-11 02:27:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:27,160 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2021-10-11 02:27:27,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:27:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2021-10-11 02:27:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 02:27:27,162 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:27,163 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:27,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:27:27,164 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]=== [2021-10-11 02:27:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:27,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1643853139, now seen corresponding path program 1 times [2021-10-11 02:27:27,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:27,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583880283] [2021-10-11 02:27:27,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:27:27,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583880283] [2021-10-11 02:27:27,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:27,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:27:27,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557707644] [2021-10-11 02:27:27,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:27:27,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:27,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:27:27,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:27:27,235 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 6 states. [2021-10-11 02:27:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:27,303 INFO L93 Difference]: Finished difference Result 149 states and 206 transitions. [2021-10-11 02:27:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:27:27,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-10-11 02:27:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:27,310 INFO L225 Difference]: With dead ends: 149 [2021-10-11 02:27:27,310 INFO L226 Difference]: Without dead ends: 91 [2021-10-11 02:27:27,313 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 [2021-10-11 02:27:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-11 02:27:27,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2021-10-11 02:27:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-10-11 02:27:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2021-10-11 02:27:27,335 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 21 [2021-10-11 02:27:27,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:27,335 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2021-10-11 02:27:27,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:27:27,335 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2021-10-11 02:27:27,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-11 02:27:27,336 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:27,337 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] [2021-10-11 02:27:27,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:27:27,337 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]=== [2021-10-11 02:27:27,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash 883505486, now seen corresponding path program 1 times [2021-10-11 02:27:27,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:27,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793038459] [2021-10-11 02:27:27,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 02:27:27,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793038459] [2021-10-11 02:27:27,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:27,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:27:27,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930255583] [2021-10-11 02:27:27,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:27:27,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:27,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:27:27,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:27:27,387 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 6 states. [2021-10-11 02:27:27,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:27,451 INFO L93 Difference]: Finished difference Result 158 states and 210 transitions. [2021-10-11 02:27:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:27:27,458 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2021-10-11 02:27:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:27,461 INFO L225 Difference]: With dead ends: 158 [2021-10-11 02:27:27,462 INFO L226 Difference]: Without dead ends: 95 [2021-10-11 02:27:27,469 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 [2021-10-11 02:27:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-11 02:27:27,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2021-10-11 02:27:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-10-11 02:27:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2021-10-11 02:27:27,500 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 27 [2021-10-11 02:27:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:27,500 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2021-10-11 02:27:27,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:27:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2021-10-11 02:27:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 02:27:27,501 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:27,502 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] [2021-10-11 02:27:27,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:27:27,502 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]=== [2021-10-11 02:27:27,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:27,503 INFO L82 PathProgramCache]: Analyzing trace with hash 952008726, now seen corresponding path program 1 times [2021-10-11 02:27:27,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:27,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819126000] [2021-10-11 02:27:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-11 02:27:27,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819126000] [2021-10-11 02:27:27,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:27,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:27,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053880912] [2021-10-11 02:27:27,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:27,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:27,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:27,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:27,536 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 4 states. [2021-10-11 02:27:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:27,555 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2021-10-11 02:27:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:27:27,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2021-10-11 02:27:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:27,557 INFO L225 Difference]: With dead ends: 94 [2021-10-11 02:27:27,557 INFO L226 Difference]: Without dead ends: 93 [2021-10-11 02:27:27,558 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 [2021-10-11 02:27:27,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-11 02:27:27,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2021-10-11 02:27:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-10-11 02:27:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2021-10-11 02:27:27,569 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 30 [2021-10-11 02:27:27,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:27,570 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2021-10-11 02:27:27,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2021-10-11 02:27:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-11 02:27:27,571 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:27,571 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] [2021-10-11 02:27:27,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 02:27:27,571 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]=== [2021-10-11 02:27:27,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:27,572 INFO L82 PathProgramCache]: Analyzing trace with hash -552500514, now seen corresponding path program 1 times [2021-10-11 02:27:27,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:27,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610738857] [2021-10-11 02:27:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-11 02:27:27,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610738857] [2021-10-11 02:27:27,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:27,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:27,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530999327] [2021-10-11 02:27:27,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:27,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:27,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:27,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:27,625 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 3 states. [2021-10-11 02:27:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:27,636 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2021-10-11 02:27:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:27,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2021-10-11 02:27:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:27,638 INFO L225 Difference]: With dead ends: 91 [2021-10-11 02:27:27,638 INFO L226 Difference]: Without dead ends: 90 [2021-10-11 02:27:27,639 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 [2021-10-11 02:27:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-11 02:27:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-11 02:27:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-10-11 02:27:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2021-10-11 02:27:27,649 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 31 [2021-10-11 02:27:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:27,650 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2021-10-11 02:27:27,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2021-10-11 02:27:27,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-11 02:27:27,652 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:27,652 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] [2021-10-11 02:27:27,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-11 02:27:27,653 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]=== [2021-10-11 02:27:27,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:27,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1111626321, now seen corresponding path program 1 times [2021-10-11 02:27:27,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:27,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284705604] [2021-10-11 02:27:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-11 02:27:27,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284705604] [2021-10-11 02:27:27,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:27,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:27:27,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013200269] [2021-10-11 02:27:27,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:27:27,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:27,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:27:27,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:27:27,712 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand 6 states. [2021-10-11 02:27:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:27,768 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2021-10-11 02:27:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:27:27,768 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2021-10-11 02:27:27,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:27,771 INFO L225 Difference]: With dead ends: 100 [2021-10-11 02:27:27,771 INFO L226 Difference]: Without dead ends: 99 [2021-10-11 02:27:27,772 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 [2021-10-11 02:27:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-11 02:27:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2021-10-11 02:27:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-10-11 02:27:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2021-10-11 02:27:27,788 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 46 [2021-10-11 02:27:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:27,788 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2021-10-11 02:27:27,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:27:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2021-10-11 02:27:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-11 02:27:27,790 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:27,790 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] [2021-10-11 02:27:27,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-11 02:27:27,791 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]=== [2021-10-11 02:27:27,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:27,794 INFO L82 PathProgramCache]: Analyzing trace with hash 930510463, now seen corresponding path program 1 times [2021-10-11 02:27:27,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:27,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088277361] [2021-10-11 02:27:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-11 02:27:27,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088277361] [2021-10-11 02:27:27,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:27,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:27:27,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812474360] [2021-10-11 02:27:27,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:27:27,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:27,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:27:27,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:27:27,866 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 6 states. [2021-10-11 02:27:27,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:27,893 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2021-10-11 02:27:27,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:27:27,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2021-10-11 02:27:27,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:27,895 INFO L225 Difference]: With dead ends: 89 [2021-10-11 02:27:27,896 INFO L226 Difference]: Without dead ends: 88 [2021-10-11 02:27:27,896 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 [2021-10-11 02:27:27,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-11 02:27:27,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-10-11 02:27:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-10-11 02:27:27,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2021-10-11 02:27:27,904 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 36 [2021-10-11 02:27:27,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:27,905 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2021-10-11 02:27:27,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:27:27,905 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2021-10-11 02:27:27,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-11 02:27:27,907 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:27,907 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] [2021-10-11 02:27:27,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-11 02:27:27,907 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]=== [2021-10-11 02:27:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:27,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1401145536, now seen corresponding path program 1 times [2021-10-11 02:27:27,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:27,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431090211] [2021-10-11 02:27:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-11 02:27:27,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431090211] [2021-10-11 02:27:27,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964635942] [2021-10-11 02:27:27,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:27:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:28,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:27:28,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:27:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-11 02:27:28,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:27:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-11 02:27:28,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763894748] [2021-10-11 02:27:28,408 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-10-11 02:27:28,408 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:27:28,417 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) [2021-10-11 02:27:28,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:27:28,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-10-11 02:27:28,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823773672] [2021-10-11 02:27:28,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-10-11 02:27:28,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:28,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-11 02:27:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:27:28,423 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand 14 states. [2021-10-11 02:27:28,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:28,752 INFO L93 Difference]: Finished difference Result 199 states and 245 transitions. [2021-10-11 02:27:28,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-11 02:27:28,753 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2021-10-11 02:27:28,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:28,755 INFO L225 Difference]: With dead ends: 199 [2021-10-11 02:27:28,755 INFO L226 Difference]: Without dead ends: 123 [2021-10-11 02:27:28,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-10-11 02:27:28,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-11 02:27:28,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2021-10-11 02:27:28,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-10-11 02:27:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2021-10-11 02:27:28,774 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 50 [2021-10-11 02:27:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:28,775 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2021-10-11 02:27:28,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-10-11 02:27:28,775 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2021-10-11 02:27:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-11 02:27:28,777 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:28,777 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] [2021-10-11 02:27:28,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-11 02:27:28,994 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]=== [2021-10-11 02:27:28,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:28,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1156205799, now seen corresponding path program 1 times [2021-10-11 02:27:28,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:28,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294314530] [2021-10-11 02:27:28,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-11 02:27:29,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294314530] [2021-10-11 02:27:29,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56149104] [2021-10-11 02:27:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:27:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:29,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:27:29,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:27:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-11 02:27:29,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:27:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-11 02:27:29,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323914471] [2021-10-11 02:27:29,352 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-10-11 02:27:29,352 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:27:29,353 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) [2021-10-11 02:27:29,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:27:29,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2021-10-11 02:27:29,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450709309] [2021-10-11 02:27:29,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:27:29,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:29,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:27:29,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:27:29,359 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand 8 states. [2021-10-11 02:27:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:29,419 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2021-10-11 02:27:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:27:29,420 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2021-10-11 02:27:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:29,421 INFO L225 Difference]: With dead ends: 118 [2021-10-11 02:27:29,422 INFO L226 Difference]: Without dead ends: 60 [2021-10-11 02:27:29,424 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 [2021-10-11 02:27:29,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-11 02:27:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-10-11 02:27:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-10-11 02:27:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-10-11 02:27:29,434 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 43 [2021-10-11 02:27:29,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:29,435 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-10-11 02:27:29,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:27:29,436 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-10-11 02:27:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-11 02:27:29,438 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:29,438 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] [2021-10-11 02:27:29,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-11 02:27:29,654 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]=== [2021-10-11 02:27:29,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:29,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1154921966, now seen corresponding path program 1 times [2021-10-11 02:27:29,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:29,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894926816] [2021-10-11 02:27:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-11 02:27:29,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894926816] [2021-10-11 02:27:29,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:29,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:29,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154254135] [2021-10-11 02:27:29,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:27:29,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:29,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:27:29,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:27:29,680 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 3 states. [2021-10-11 02:27:29,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:29,686 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-10-11 02:27:29,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:27:29,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2021-10-11 02:27:29,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:29,688 INFO L225 Difference]: With dead ends: 58 [2021-10-11 02:27:29,688 INFO L226 Difference]: Without dead ends: 57 [2021-10-11 02:27:29,688 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 [2021-10-11 02:27:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-11 02:27:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-11 02:27:29,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-10-11 02:27:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-10-11 02:27:29,693 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 43 [2021-10-11 02:27:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:29,693 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-10-11 02:27:29,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:27:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-10-11 02:27:29,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-11 02:27:29,694 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:29,694 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] [2021-10-11 02:27:29,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-11 02:27:29,695 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]=== [2021-10-11 02:27:29,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:29,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1442842648, now seen corresponding path program 1 times [2021-10-11 02:27:29,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:29,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087446236] [2021-10-11 02:27:29,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-11 02:27:29,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087446236] [2021-10-11 02:27:29,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:29,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:29,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84691979] [2021-10-11 02:27:29,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:29,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:29,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:29,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:29,724 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 4 states. [2021-10-11 02:27:29,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:29,731 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-10-11 02:27:29,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:27:29,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2021-10-11 02:27:29,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:29,732 INFO L225 Difference]: With dead ends: 57 [2021-10-11 02:27:29,733 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:27:29,733 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 [2021-10-11 02:27:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:27:29,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:27:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:27:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:27:29,734 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2021-10-11 02:27:29,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:29,734 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:27:29,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:27:29,734 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:27:29,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-11 02:27:29,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:27:30,145 INFO L262 CegarLoopResult]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,145 INFO L262 CegarLoopResult]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2021-10-11 02:27:30,145 INFO L262 CegarLoopResult]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,145 INFO L262 CegarLoopResult]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2021-10-11 02:27:30,146 INFO L262 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,146 INFO L265 CegarLoopResult]: At program point rec1ENTRY(lines 11 15) the Hoare annotation is: true [2021-10-11 02:27:30,146 INFO L262 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,146 INFO L262 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-10-11 02:27:30,146 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))) [2021-10-11 02:27:30,146 INFO L262 CegarLoopResult]: For program point L14-3(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,146 INFO L262 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,147 INFO L262 CegarLoopResult]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,147 INFO L262 CegarLoopResult]: For program point L14-5(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,148 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))) [2021-10-11 02:27:30,148 INFO L262 CegarLoopResult]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,148 INFO L262 CegarLoopResult]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,148 INFO L262 CegarLoopResult]: For program point L14-7(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,148 INFO L262 CegarLoopResult]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,148 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))) [2021-10-11 02:27:30,149 INFO L262 CegarLoopResult]: For program point L14-9(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,149 INFO L262 CegarLoopResult]: For program point L14-10(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,149 INFO L262 CegarLoopResult]: For program point L14-11(line 14) no Hoare annotation was computed. [2021-10-11 02:27:30,149 INFO L262 CegarLoopResult]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-10-11 02:27:30,149 INFO L262 CegarLoopResult]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2021-10-11 02:27:30,149 INFO L262 CegarLoopResult]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2021-10-11 02:27:30,149 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))) [2021-10-11 02:27:30,150 INFO L262 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2021-10-11 02:27:30,150 INFO L262 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2021-10-11 02:27:30,150 INFO L262 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2021-10-11 02:27:30,150 INFO L262 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2021-10-11 02:27:30,150 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))) [2021-10-11 02:27:30,150 INFO L262 CegarLoopResult]: For program point L20-5(line 20) no Hoare annotation was computed. [2021-10-11 02:27:30,150 INFO L262 CegarLoopResult]: For program point L20-6(line 20) no Hoare annotation was computed. [2021-10-11 02:27:30,150 INFO L262 CegarLoopResult]: For program point L20-7(line 20) no Hoare annotation was computed. [2021-10-11 02:27:30,150 INFO L265 CegarLoopResult]: At program point rec2ENTRY(lines 17 21) the Hoare annotation is: true [2021-10-11 02:27:30,150 INFO L262 CegarLoopResult]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-10-11 02:27:30,151 INFO L262 CegarLoopResult]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-10-11 02:27:30,151 INFO L262 CegarLoopResult]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-10-11 02:27:30,151 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:27:30,151 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:27:30,151 INFO L258 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2021-10-11 02:27:30,151 INFO L262 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-10-11 02:27:30,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:27:30 BoogieIcfgContainer [2021-10-11 02:27:30,157 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:27:30,157 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:27:30,157 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:27:30,158 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:27:30,158 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:25" (3/4) ... [2021-10-11 02:27:30,163 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:27:30,171 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2021-10-11 02:27:30,171 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2021-10-11 02:27:30,180 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-11 02:27:30,180 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:27:30,180 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:27:30,246 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_659408dc-4998-416e-90f1-9ff55d0a3189/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:27:30,246 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:27:30,248 INFO L168 Benchmark]: Toolchain (without parser) took 5130.60 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 98.8 MB in the beginning and 87.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 37.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:30,248 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 79.7 MB. Free memory was 36.6 MB in the beginning and 36.5 MB in the end (delta: 36.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:30,249 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.81 ms. Allocated memory is still 130.0 MB. Free memory was 98.6 MB in the beginning and 109.1 MB in the end (delta: -10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:30,250 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.79 ms. Allocated memory is still 130.0 MB. Free memory was 108.9 MB in the beginning and 107.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:30,250 INFO L168 Benchmark]: Boogie Preprocessor took 18.76 ms. Allocated memory is still 130.0 MB. Free memory was 107.5 MB in the beginning and 106.8 MB in the end (delta: 672.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:30,250 INFO L168 Benchmark]: RCFGBuilder took 307.98 ms. Allocated memory is still 130.0 MB. Free memory was 106.8 MB in the beginning and 93.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:30,251 INFO L168 Benchmark]: TraceAbstraction took 4421.07 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 92.9 MB in the beginning and 90.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 77.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:30,251 INFO L168 Benchmark]: Witness Printer took 88.73 ms. Allocated memory is still 157.3 MB. Free memory was 90.8 MB in the beginning and 87.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:30,253 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 79.7 MB. Free memory was 36.6 MB in the beginning and 36.5 MB in the end (delta: 36.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 255.81 ms. Allocated memory is still 130.0 MB. Free memory was 98.6 MB in the beginning and 109.1 MB in the end (delta: -10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.79 ms. Allocated memory is still 130.0 MB. Free memory was 108.9 MB in the beginning and 107.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.76 ms. Allocated memory is still 130.0 MB. Free memory was 107.5 MB in the beginning and 106.8 MB in the end (delta: 672.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 307.98 ms. Allocated memory is still 130.0 MB. Free memory was 106.8 MB in the beginning and 93.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4421.07 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 92.9 MB in the beginning and 90.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 77.9 MB. Max. memory is 16.1 GB. * Witness Printer took 88.73 ms. Allocated memory is still 157.3 MB. Free memory was 90.8 MB in the beginning and 87.7 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: 3.9s, OverallIterations: 17, TraceHistogramMax: 7, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 658 SDtfs, 203 SDslu, 1574 SDs, 0 SdLazy, 533 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 273 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s 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: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 101 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 194 PreInvPairs, 201 NumberOfFragments, 105 HoareAnnotationTreeSize, 194 FomulaSimplifications, 557 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 252 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s 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...