./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P --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 9948dbd77aeb2de72e0bd3a3a4e22b1606b19383e4631af58adbec46ed909b6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:50:09,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:50:09,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:50:09,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:50:09,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:50:09,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:50:09,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:50:09,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:50:09,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:50:09,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:50:09,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:50:09,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:50:09,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:50:09,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:50:09,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:50:09,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:50:09,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:50:09,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:50:09,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:50:09,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:50:09,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:50:09,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:50:09,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:50:09,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:50:09,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:50:09,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:50:09,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:50:09,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:50:09,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:50:09,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:50:09,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:50:09,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:50:09,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:50:09,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:50:09,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:50:09,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:50:09,357 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:50:09,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:50:09,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:50:09,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:50:09,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:50:09,361 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-20 22:50:09,394 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:50:09,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:50:09,395 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:50:09,395 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:50:09,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:50:09,396 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:50:09,396 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:50:09,396 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:50:09,397 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:50:09,397 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:50:09,397 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:50:09,397 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:50:09,398 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:50:09,398 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:50:09,398 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:50:09,398 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:50:09,399 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:50:09,399 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:50:09,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:50:09,400 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 22:50:09,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:50:09,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:50:09,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:50:09,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:50:09,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:50:09,401 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-20 22:50:09,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:50:09,401 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:50:09,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:50:09,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:50:09,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:50:09,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:50:09,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:50:09,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:50:09,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:50:09,412 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:50:09,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:50:09,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:50:09,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:50:09,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:50:09,413 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_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9948dbd77aeb2de72e0bd3a3a4e22b1606b19383e4631af58adbec46ed909b6c [2021-11-20 22:50:09,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:50:09,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:50:09,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:50:09,676 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:50:09,677 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:50:09,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2021-11-20 22:50:09,767 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/data/87f9f8c50/39e20ab267b04bb9a2f3acc44b1d6c86/FLAG9f160b8fe [2021-11-20 22:50:10,143 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:50:10,144 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2021-11-20 22:50:10,149 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/data/87f9f8c50/39e20ab267b04bb9a2f3acc44b1d6c86/FLAG9f160b8fe [2021-11-20 22:50:10,554 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/data/87f9f8c50/39e20ab267b04bb9a2f3acc44b1d6c86 [2021-11-20 22:50:10,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:50:10,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:50:10,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:50:10,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:50:10,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:50:10,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:10" (1/1) ... [2021-11-20 22:50:10,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33bb69c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:10, skipping insertion in model container [2021-11-20 22:50:10,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:10" (1/1) ... [2021-11-20 22:50:10,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:50:10,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:50:10,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:50:10,733 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:50:10,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:50:10,761 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:50:10,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:10 WrapperNode [2021-11-20 22:50:10,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:50:10,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:50:10,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:50:10,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:50:10,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:10" (1/1) ... [2021-11-20 22:50:10,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:10" (1/1) ... [2021-11-20 22:50:10,792 INFO L137 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 8 [2021-11-20 22:50:10,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:50:10,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:50:10,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:50:10,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:50:10,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:10" (1/1) ... [2021-11-20 22:50:10,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:10" (1/1) ... [2021-11-20 22:50:10,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:10" (1/1) ... [2021-11-20 22:50:10,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:10" (1/1) ... [2021-11-20 22:50:10,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:10" (1/1) ... [2021-11-20 22:50:10,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:10" (1/1) ... [2021-11-20 22:50:10,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:10" (1/1) ... [2021-11-20 22:50:10,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:50:10,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:50:10,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:50:10,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:50:10,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:10" (1/1) ... [2021-11-20 22:50:10,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:50:10,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:10,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:50:10,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:50:10,921 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2021-11-20 22:50:10,922 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2021-11-20 22:50:10,922 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2021-11-20 22:50:10,923 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2021-11-20 22:50:10,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:50:10,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:50:10,980 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:50:10,982 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:50:11,171 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:50:11,198 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:50:11,198 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 22:50:11,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:11 BoogieIcfgContainer [2021-11-20 22:50:11,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:50:11,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:50:11,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:50:11,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:50:11,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:10" (1/3) ... [2021-11-20 22:50:11,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60dede12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:11, skipping insertion in model container [2021-11-20 22:50:11,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:10" (2/3) ... [2021-11-20 22:50:11,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60dede12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:11, skipping insertion in model container [2021-11-20 22:50:11,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:11" (3/3) ... [2021-11-20 22:50:11,209 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1b.c [2021-11-20 22:50:11,214 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:50:11,215 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-20 22:50:11,260 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:50:11,268 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:50:11,268 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-20 22:50:11,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 22:50:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 22:50:11,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:11,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 22:50:11,291 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:11,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:11,296 INFO L85 PathProgramCache]: Analyzing trace with hash 88622395, now seen corresponding path program 1 times [2021-11-20 22:50:11,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:11,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577391105] [2021-11-20 22:50:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:11,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:11,502 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:11,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577391105] [2021-11-20 22:50:11,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577391105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:11,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:11,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:50:11,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102290228] [2021-11-20 22:50:11,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:11,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:50:11,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:11,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:50:11,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:50:11,552 INFO L87 Difference]: Start difference. First operand has 42 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:11,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:11,655 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-11-20 22:50:11,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:50:11,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 22:50:11,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:11,665 INFO L225 Difference]: With dead ends: 60 [2021-11-20 22:50:11,665 INFO L226 Difference]: Without dead ends: 55 [2021-11-20 22:50:11,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:50:11,673 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 26 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:11,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 156 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:11,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-20 22:50:11,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2021-11-20 22:50:11,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 39 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 22:50:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-11-20 22:50:11,726 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 5 [2021-11-20 22:50:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:11,727 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-11-20 22:50:11,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-11-20 22:50:11,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 22:50:11,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:11,728 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 22:50:11,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:50:11,728 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:11,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1547672989, now seen corresponding path program 1 times [2021-11-20 22:50:11,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:11,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982866074] [2021-11-20 22:50:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:11,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:11,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:11,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982866074] [2021-11-20 22:50:11,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982866074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:11,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:11,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:50:11,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76610596] [2021-11-20 22:50:11,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:11,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:11,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:11,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:11,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:11,753 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:11,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:11,771 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-11-20 22:50:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:11,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 22:50:11,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:11,773 INFO L225 Difference]: With dead ends: 52 [2021-11-20 22:50:11,774 INFO L226 Difference]: Without dead ends: 51 [2021-11-20 22:50:11,774 INFO L932 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 [2021-11-20 22:50:11,776 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:11,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 71 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-20 22:50:11,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-11-20 22:50:11,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.4) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 22:50:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-11-20 22:50:11,791 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 6 [2021-11-20 22:50:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:11,791 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-11-20 22:50:11,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:11,792 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-11-20 22:50:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 22:50:11,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:11,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:11,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 22:50:11,793 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:11,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:11,794 INFO L85 PathProgramCache]: Analyzing trace with hash 777651629, now seen corresponding path program 1 times [2021-11-20 22:50:11,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:11,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494721473] [2021-11-20 22:50:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:11,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:11,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:11,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494721473] [2021-11-20 22:50:11,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494721473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:11,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:11,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:50:11,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103423774] [2021-11-20 22:50:11,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:11,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:50:11,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:11,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:50:11,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:50:11,854 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:11,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:11,976 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2021-11-20 22:50:11,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:50:11,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 22:50:11,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:11,979 INFO L225 Difference]: With dead ends: 77 [2021-11-20 22:50:11,979 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 22:50:11,980 INFO L932 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 [2021-11-20 22:50:11,982 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 50 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:11,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 213 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 22:50:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2021-11-20 22:50:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 50 states have internal predecessors, (60), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 22:50:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2021-11-20 22:50:12,001 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 10 [2021-11-20 22:50:12,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:12,002 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2021-11-20 22:50:12,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2021-11-20 22:50:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 22:50:12,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:12,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:12,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 22:50:12,004 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:12,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:12,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1662603239, now seen corresponding path program 1 times [2021-11-20 22:50:12,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:12,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925531122] [2021-11-20 22:50:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:12,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:12,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:12,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925531122] [2021-11-20 22:50:12,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925531122] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:12,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:12,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:50:12,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214415595] [2021-11-20 22:50:12,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:12,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:12,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:12,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:12,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:12,031 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:12,047 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2021-11-20 22:50:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:12,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 22:50:12,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:12,050 INFO L225 Difference]: With dead ends: 69 [2021-11-20 22:50:12,050 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 22:50:12,051 INFO L932 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 [2021-11-20 22:50:12,053 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:12,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 22:50:12,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2021-11-20 22:50:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.380952380952381) internal successors, (58), 49 states have internal predecessors, (58), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 22:50:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-11-20 22:50:12,069 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 11 [2021-11-20 22:50:12,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:12,069 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-11-20 22:50:12,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:12,070 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-11-20 22:50:12,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 22:50:12,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:12,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:12,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 22:50:12,088 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:12,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:12,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1965384520, now seen corresponding path program 1 times [2021-11-20 22:50:12,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:12,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647829047] [2021-11-20 22:50:12,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:12,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:12,163 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:12,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647829047] [2021-11-20 22:50:12,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647829047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:12,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:12,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:50:12,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897784175] [2021-11-20 22:50:12,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:12,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:50:12,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:12,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:50:12,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:50:12,170 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:50:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:12,225 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2021-11-20 22:50:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:50:12,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-20 22:50:12,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:12,228 INFO L225 Difference]: With dead ends: 125 [2021-11-20 22:50:12,228 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 22:50:12,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:50:12,231 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:12,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 190 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:12,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 22:50:12,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-11-20 22:50:12,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 58 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-20 22:50:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2021-11-20 22:50:12,249 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 16 [2021-11-20 22:50:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:12,250 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2021-11-20 22:50:12,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:50:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2021-11-20 22:50:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 22:50:12,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:12,252 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:12,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 22:50:12,252 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:12,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:12,253 INFO L85 PathProgramCache]: Analyzing trace with hash -448860904, now seen corresponding path program 1 times [2021-11-20 22:50:12,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:12,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957284360] [2021-11-20 22:50:12,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:12,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:50:12,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:12,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957284360] [2021-11-20 22:50:12,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957284360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:12,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:12,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:50:12,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849826717] [2021-11-20 22:50:12,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:12,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:12,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:12,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:12,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:12,290 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:50:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:12,304 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2021-11-20 22:50:12,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:12,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-20 22:50:12,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:12,307 INFO L225 Difference]: With dead ends: 76 [2021-11-20 22:50:12,307 INFO L226 Difference]: Without dead ends: 75 [2021-11-20 22:50:12,308 INFO L932 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 [2021-11-20 22:50:12,310 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:12,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 67 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-20 22:50:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-20 22:50:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 57 states have internal predecessors, (63), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-20 22:50:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2021-11-20 22:50:12,330 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 18 [2021-11-20 22:50:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:12,331 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2021-11-20 22:50:12,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:50:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2021-11-20 22:50:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 22:50:12,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:12,333 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:12,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 22:50:12,341 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:12,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:12,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1775548071, now seen corresponding path program 1 times [2021-11-20 22:50:12,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:12,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127889515] [2021-11-20 22:50:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:12,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:50:12,382 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:12,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127889515] [2021-11-20 22:50:12,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127889515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:12,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:12,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:50:12,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374998596] [2021-11-20 22:50:12,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:12,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:12,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:12,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:12,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:12,385 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:50:12,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:12,399 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-11-20 22:50:12,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:12,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-20 22:50:12,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:12,401 INFO L225 Difference]: With dead ends: 75 [2021-11-20 22:50:12,411 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 22:50:12,412 INFO L932 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 [2021-11-20 22:50:12,413 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:12,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 73 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 22:50:12,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-20 22:50:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 56 states have internal predecessors, (61), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-20 22:50:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2021-11-20 22:50:12,442 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 19 [2021-11-20 22:50:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:12,443 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2021-11-20 22:50:12,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:50:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2021-11-20 22:50:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 22:50:12,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:12,444 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:12,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 22:50:12,445 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:12,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:12,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1029786092, now seen corresponding path program 1 times [2021-11-20 22:50:12,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:12,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719066928] [2021-11-20 22:50:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:12,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:50:12,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:12,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719066928] [2021-11-20 22:50:12,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719066928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:12,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:12,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:50:12,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929134462] [2021-11-20 22:50:12,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:12,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:12,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:12,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:12,508 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:50:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:12,530 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2021-11-20 22:50:12,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:12,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-20 22:50:12,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:12,532 INFO L225 Difference]: With dead ends: 95 [2021-11-20 22:50:12,533 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 22:50:12,533 INFO L932 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 [2021-11-20 22:50:12,534 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:12,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 111 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:12,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 22:50:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2021-11-20 22:50:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 60 states have internal predecessors, (67), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (20), 14 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-20 22:50:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-11-20 22:50:12,549 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 19 [2021-11-20 22:50:12,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:12,550 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-11-20 22:50:12,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:50:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-11-20 22:50:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 22:50:12,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:12,552 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:12,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 22:50:12,552 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:12,553 INFO L85 PathProgramCache]: Analyzing trace with hash -792584577, now seen corresponding path program 1 times [2021-11-20 22:50:12,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:12,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807373146] [2021-11-20 22:50:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:12,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:50:12,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:12,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807373146] [2021-11-20 22:50:12,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807373146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:12,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:12,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:50:12,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798333362] [2021-11-20 22:50:12,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:12,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:12,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:12,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:12,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:12,602 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:50:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:12,638 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2021-11-20 22:50:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:12,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-20 22:50:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:12,641 INFO L225 Difference]: With dead ends: 89 [2021-11-20 22:50:12,642 INFO L226 Difference]: Without dead ends: 83 [2021-11-20 22:50:12,643 INFO L932 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 [2021-11-20 22:50:12,645 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:12,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-20 22:50:12,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-20 22:50:12,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 58 states have (on average 1.206896551724138) internal successors, (70), 63 states have internal predecessors, (70), 12 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2021-11-20 22:50:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2021-11-20 22:50:12,676 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 20 [2021-11-20 22:50:12,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:12,677 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2021-11-20 22:50:12,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:50:12,677 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2021-11-20 22:50:12,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 22:50:12,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:12,678 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:12,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 22:50:12,679 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1234388834, now seen corresponding path program 1 times [2021-11-20 22:50:12,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:12,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594912596] [2021-11-20 22:50:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:12,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:50:12,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:12,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594912596] [2021-11-20 22:50:12,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594912596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:12,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:12,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:50:12,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053585301] [2021-11-20 22:50:12,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:12,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:50:12,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:12,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:50:12,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:50:12,732 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:50:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:12,788 INFO L93 Difference]: Finished difference Result 167 states and 222 transitions. [2021-11-20 22:50:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:50:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-20 22:50:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:12,790 INFO L225 Difference]: With dead ends: 167 [2021-11-20 22:50:12,790 INFO L226 Difference]: Without dead ends: 101 [2021-11-20 22:50:12,793 INFO L932 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 [2021-11-20 22:50:12,794 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:12,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 181 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:12,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-20 22:50:12,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2021-11-20 22:50:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 68 states have internal predecessors, (73), 14 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (21), 14 states have call predecessors, (21), 13 states have call successors, (21) [2021-11-20 22:50:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2021-11-20 22:50:12,806 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 23 [2021-11-20 22:50:12,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:12,807 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2021-11-20 22:50:12,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 22:50:12,807 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2021-11-20 22:50:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 22:50:12,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:12,808 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:12,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 22:50:12,809 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:12,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1436786463, now seen corresponding path program 1 times [2021-11-20 22:50:12,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:12,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019233957] [2021-11-20 22:50:12,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:12,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 22:50:12,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:12,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019233957] [2021-11-20 22:50:12,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019233957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:12,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:12,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:50:12,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490763481] [2021-11-20 22:50:12,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:12,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:50:12,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:12,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:50:12,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:50:12,860 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:50:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:12,910 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2021-11-20 22:50:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:50:12,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2021-11-20 22:50:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:12,912 INFO L225 Difference]: With dead ends: 176 [2021-11-20 22:50:12,913 INFO L226 Difference]: Without dead ends: 105 [2021-11-20 22:50:12,914 INFO L932 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 [2021-11-20 22:50:12,915 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:12,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 188 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-20 22:50:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2021-11-20 22:50:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 73 states have internal predecessors, (78), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2021-11-20 22:50:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2021-11-20 22:50:12,927 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 34 [2021-11-20 22:50:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:12,928 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2021-11-20 22:50:12,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 22:50:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2021-11-20 22:50:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 22:50:12,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:12,936 INFO L514 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, 1] [2021-11-20 22:50:12,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 22:50:12,937 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:12,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:12,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1617756950, now seen corresponding path program 1 times [2021-11-20 22:50:12,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:12,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28300678] [2021-11-20 22:50:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:12,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 22:50:13,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:13,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28300678] [2021-11-20 22:50:13,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28300678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:13,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:13,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:50:13,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527397367] [2021-11-20 22:50:13,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:13,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:50:13,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:13,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:50:13,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:50:13,002 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:50:13,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:13,025 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2021-11-20 22:50:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:50:13,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-11-20 22:50:13,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:13,028 INFO L225 Difference]: With dead ends: 104 [2021-11-20 22:50:13,028 INFO L226 Difference]: Without dead ends: 103 [2021-11-20 22:50:13,029 INFO L932 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 [2021-11-20 22:50:13,029 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:13,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 109 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-20 22:50:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-11-20 22:50:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 75 states have internal predecessors, (82), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2021-11-20 22:50:13,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2021-11-20 22:50:13,059 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 32 [2021-11-20 22:50:13,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:13,059 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2021-11-20 22:50:13,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:50:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2021-11-20 22:50:13,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 22:50:13,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:13,063 INFO L514 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, 1, 1] [2021-11-20 22:50:13,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 22:50:13,063 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:13,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1389142154, now seen corresponding path program 1 times [2021-11-20 22:50:13,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:13,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322013360] [2021-11-20 22:50:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:13,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 22:50:13,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:13,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322013360] [2021-11-20 22:50:13,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322013360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:13,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:13,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:50:13,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732105694] [2021-11-20 22:50:13,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:13,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:13,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:13,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:13,106 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:50:13,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:13,122 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2021-11-20 22:50:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:13,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2021-11-20 22:50:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:13,128 INFO L225 Difference]: With dead ends: 101 [2021-11-20 22:50:13,128 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 22:50:13,128 INFO L932 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 [2021-11-20 22:50:13,131 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:13,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 71 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 22:50:13,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-11-20 22:50:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 74 states have internal predecessors, (80), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2021-11-20 22:50:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2021-11-20 22:50:13,147 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 33 [2021-11-20 22:50:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:13,149 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2021-11-20 22:50:13,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:50:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2021-11-20 22:50:13,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 22:50:13,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:13,155 INFO L514 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, 1, 1] [2021-11-20 22:50:13,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 22:50:13,156 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:13,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash 135732836, now seen corresponding path program 1 times [2021-11-20 22:50:13,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:13,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975493056] [2021-11-20 22:50:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:13,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 22:50:13,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:13,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975493056] [2021-11-20 22:50:13,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975493056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:13,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:13,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:50:13,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736886910] [2021-11-20 22:50:13,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:13,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:50:13,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:13,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:50:13,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:50:13,220 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 22:50:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:13,271 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2021-11-20 22:50:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:50:13,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-11-20 22:50:13,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:13,279 INFO L225 Difference]: With dead ends: 110 [2021-11-20 22:50:13,279 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 22:50:13,280 INFO L932 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 [2021-11-20 22:50:13,281 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:13,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 157 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 22:50:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-11-20 22:50:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 73 states have internal predecessors, (78), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2021-11-20 22:50:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2021-11-20 22:50:13,301 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 48 [2021-11-20 22:50:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:13,302 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2021-11-20 22:50:13,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 22:50:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2021-11-20 22:50:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 22:50:13,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:13,305 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1] [2021-11-20 22:50:13,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 22:50:13,305 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:13,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:13,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1995449748, now seen corresponding path program 1 times [2021-11-20 22:50:13,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:13,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918623201] [2021-11-20 22:50:13,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:13,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 22:50:13,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918623201] [2021-11-20 22:50:13,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918623201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836966003] [2021-11-20 22:50:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:13,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:13,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:13,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:13,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:50:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:13,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:50:13,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 22:50:13,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:50:13,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836966003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:13,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:50:13,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2021-11-20 22:50:13,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750686542] [2021-11-20 22:50:13,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:13,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:50:13,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:13,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:50:13,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-20 22:50:13,685 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 22:50:13,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:13,788 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2021-11-20 22:50:13,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:50:13,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-11-20 22:50:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:13,789 INFO L225 Difference]: With dead ends: 100 [2021-11-20 22:50:13,790 INFO L226 Difference]: Without dead ends: 99 [2021-11-20 22:50:13,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-20 22:50:13,791 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 25 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:13,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 189 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-20 22:50:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-11-20 22:50:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 70 states have (on average 1.1) internal successors, (77), 72 states have internal predecessors, (77), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (23), 18 states have call predecessors, (23), 15 states have call successors, (23) [2021-11-20 22:50:13,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2021-11-20 22:50:13,799 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 40 [2021-11-20 22:50:13,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:13,799 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2021-11-20 22:50:13,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 22:50:13,800 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2021-11-20 22:50:13,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 22:50:13,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:13,800 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:13,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:14,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 22:50:14,001 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:14,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1614279342, now seen corresponding path program 1 times [2021-11-20 22:50:14,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:14,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205818212] [2021-11-20 22:50:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:14,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 22:50:14,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:14,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205818212] [2021-11-20 22:50:14,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205818212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:14,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432947441] [2021-11-20 22:50:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:14,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:14,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:14,090 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:14,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:50:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:14,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:50:14,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 22:50:14,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:50:14,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432947441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:14,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:50:14,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2021-11-20 22:50:14,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526529810] [2021-11-20 22:50:14,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:14,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:50:14,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:14,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:50:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-20 22:50:14,296 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 22:50:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:14,440 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2021-11-20 22:50:14,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 22:50:14,441 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2021-11-20 22:50:14,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:14,442 INFO L225 Difference]: With dead ends: 126 [2021-11-20 22:50:14,442 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 22:50:14,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-20 22:50:14,443 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 27 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:14,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 192 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 22:50:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-11-20 22:50:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 89 states have (on average 1.101123595505618) internal successors, (98), 91 states have internal predecessors, (98), 21 states have call successors, (21), 8 states have call predecessors, (21), 11 states have return successors, (31), 24 states have call predecessors, (31), 20 states have call successors, (31) [2021-11-20 22:50:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 150 transitions. [2021-11-20 22:50:14,454 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 150 transitions. Word has length 47 [2021-11-20 22:50:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:14,454 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 150 transitions. [2021-11-20 22:50:14,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 22:50:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 150 transitions. [2021-11-20 22:50:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 22:50:14,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:14,456 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:14,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:14,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:14,683 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:14,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:14,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2105707276, now seen corresponding path program 1 times [2021-11-20 22:50:14,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:14,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244435610] [2021-11-20 22:50:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:14,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 22:50:14,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:14,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244435610] [2021-11-20 22:50:14,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244435610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:14,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40809633] [2021-11-20 22:50:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:14,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:14,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:14,779 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:14,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 22:50:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:14,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:50:14,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 22:50:14,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:50:14,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40809633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:14,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:50:14,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2021-11-20 22:50:14,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133185048] [2021-11-20 22:50:14,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:14,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:50:14,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:14,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:50:14,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-20 22:50:14,930 INFO L87 Difference]: Start difference. First operand 124 states and 150 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 22:50:14,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:14,992 INFO L93 Difference]: Finished difference Result 152 states and 185 transitions. [2021-11-20 22:50:14,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:50:14,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2021-11-20 22:50:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:14,994 INFO L225 Difference]: With dead ends: 152 [2021-11-20 22:50:14,995 INFO L226 Difference]: Without dead ends: 151 [2021-11-20 22:50:14,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:50:14,996 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 33 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:14,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 106 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:14,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-20 22:50:15,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-11-20 22:50:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 108 states have (on average 1.1018518518518519) internal successors, (119), 110 states have internal predecessors, (119), 26 states have call successors, (26), 9 states have call predecessors, (26), 13 states have return successors, (39), 30 states have call predecessors, (39), 25 states have call successors, (39) [2021-11-20 22:50:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2021-11-20 22:50:15,015 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 45 [2021-11-20 22:50:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:15,015 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2021-11-20 22:50:15,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 22:50:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2021-11-20 22:50:15,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 22:50:15,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:15,018 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:15,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:15,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 22:50:15,231 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:15,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:15,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1227928372, now seen corresponding path program 1 times [2021-11-20 22:50:15,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:15,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74856167] [2021-11-20 22:50:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:15,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 22:50:15,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:15,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74856167] [2021-11-20 22:50:15,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74856167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:15,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077630584] [2021-11-20 22:50:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:15,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:15,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:15,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:15,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 22:50:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:15,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:50:15,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 22:50:15,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 22:50:15,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077630584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:50:15,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1888504427] [2021-11-20 22:50:15,695 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-20 22:50:15,695 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:50:15,702 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-20 22:50:15,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:50:15,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-20 22:50:15,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594334803] [2021-11-20 22:50:15,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:50:15,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:50:15,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:15,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:50:15,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:50:15,706 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 5 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 22:50:15,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:15,745 INFO L93 Difference]: Finished difference Result 175 states and 214 transitions. [2021-11-20 22:50:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 22:50:15,746 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 5 states have call predecessors, (8), 1 states have call successors, (8) Word has length 60 [2021-11-20 22:50:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:15,748 INFO L225 Difference]: With dead ends: 175 [2021-11-20 22:50:15,748 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 22:50:15,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:50:15,749 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:15,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 167 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 22:50:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-20 22:50:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 120 states have (on average 1.0916666666666666) internal successors, (131), 122 states have internal predecessors, (131), 26 states have call successors, (26), 9 states have call predecessors, (26), 16 states have return successors, (42), 33 states have call predecessors, (42), 25 states have call successors, (42) [2021-11-20 22:50:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2021-11-20 22:50:15,769 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 60 [2021-11-20 22:50:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:15,769 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2021-11-20 22:50:15,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 5 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-20 22:50:15,771 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2021-11-20 22:50:15,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 22:50:15,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:15,772 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:15,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:15,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 22:50:15,999 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:15,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:15,999 INFO L85 PathProgramCache]: Analyzing trace with hash -585213769, now seen corresponding path program 2 times [2021-11-20 22:50:15,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:15,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119917847] [2021-11-20 22:50:15,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:16,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 71 proven. 28 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-20 22:50:16,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:16,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119917847] [2021-11-20 22:50:16,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119917847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:16,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117974390] [2021-11-20 22:50:16,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:50:16,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:16,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:16,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:16,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 22:50:16,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 22:50:16,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:50:16,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:50:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-20 22:50:16,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:50:16,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117974390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:16,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:50:16,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2021-11-20 22:50:16,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927060581] [2021-11-20 22:50:16,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:16,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:50:16,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:16,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:50:16,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:50:16,281 INFO L87 Difference]: Start difference. First operand 165 states and 199 transitions. Second operand has 5 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:50:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:16,348 INFO L93 Difference]: Finished difference Result 166 states and 199 transitions. [2021-11-20 22:50:16,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:50:16,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 82 [2021-11-20 22:50:16,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:16,351 INFO L225 Difference]: With dead ends: 166 [2021-11-20 22:50:16,351 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 22:50:16,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-20 22:50:16,352 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 28 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:16,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 147 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:16,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 22:50:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-11-20 22:50:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 120 states have (on average 1.0833333333333333) internal successors, (130), 121 states have internal predecessors, (130), 26 states have call successors, (26), 9 states have call predecessors, (26), 16 states have return successors, (42), 33 states have call predecessors, (42), 25 states have call successors, (42) [2021-11-20 22:50:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 198 transitions. [2021-11-20 22:50:16,364 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 198 transitions. Word has length 82 [2021-11-20 22:50:16,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:16,365 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 198 transitions. [2021-11-20 22:50:16,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 22:50:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 198 transitions. [2021-11-20 22:50:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 22:50:16,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:16,368 INFO L514 BasicCegarLoop]: trace histogram [14, 12, 9, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:16,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 22:50:16,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:16,595 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:16,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1199095554, now seen corresponding path program 1 times [2021-11-20 22:50:16,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:16,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385212585] [2021-11-20 22:50:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:16,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 53 proven. 77 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-20 22:50:16,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:16,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385212585] [2021-11-20 22:50:16,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385212585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:16,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093225459] [2021-11-20 22:50:16,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:16,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:16,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:16,664 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:16,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 22:50:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:16,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 22:50:16,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 229 proven. 28 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-20 22:50:16,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 53 proven. 77 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-20 22:50:17,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093225459] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:50:17,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [863357976] [2021-11-20 22:50:17,260 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-20 22:50:17,261 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:50:17,261 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-20 22:50:17,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:50:17,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2021-11-20 22:50:17,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577144905] [2021-11-20 22:50:17,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:50:17,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 22:50:17,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:17,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 22:50:17,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:50:17,267 INFO L87 Difference]: Start difference. First operand 164 states and 198 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 22:50:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:17,372 INFO L93 Difference]: Finished difference Result 271 states and 332 transitions. [2021-11-20 22:50:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:50:17,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 109 [2021-11-20 22:50:17,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:17,374 INFO L225 Difference]: With dead ends: 271 [2021-11-20 22:50:17,375 INFO L226 Difference]: Without dead ends: 107 [2021-11-20 22:50:17,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:50:17,377 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:17,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 109 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-20 22:50:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2021-11-20 22:50:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 72 states have internal predecessors, (74), 12 states have call successors, (12), 7 states have call predecessors, (12), 12 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2021-11-20 22:50:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-11-20 22:50:17,384 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 109 [2021-11-20 22:50:17,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:17,384 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-11-20 22:50:17,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 4 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 22:50:17,385 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-11-20 22:50:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-20 22:50:17,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:17,387 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 15, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1] [2021-11-20 22:50:17,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:17,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:17,603 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:17,603 INFO L85 PathProgramCache]: Analyzing trace with hash -379647221, now seen corresponding path program 2 times [2021-11-20 22:50:17,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:17,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079232021] [2021-11-20 22:50:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:17,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 64 proven. 180 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-11-20 22:50:17,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:17,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079232021] [2021-11-20 22:50:17,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079232021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:17,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142458760] [2021-11-20 22:50:17,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:50:17,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:17,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:17,727 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:17,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 22:50:17,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 22:50:17,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:50:17,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 22:50:17,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2021-11-20 22:50:18,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 22:50:18,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142458760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:18,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:50:18,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-11-20 22:50:18,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640137702] [2021-11-20 22:50:18,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:18,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:50:18,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:18,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:50:18,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-11-20 22:50:18,145 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 22:50:18,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:18,203 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2021-11-20 22:50:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:50:18,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 204 [2021-11-20 22:50:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:18,205 INFO L225 Difference]: With dead ends: 122 [2021-11-20 22:50:18,205 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 22:50:18,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-20 22:50:18,206 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:18,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 158 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:18,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 22:50:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-20 22:50:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 12 states have call successors, (12), 7 states have call predecessors, (12), 11 states have return successors, (17), 15 states have call predecessors, (17), 11 states have call successors, (17) [2021-11-20 22:50:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2021-11-20 22:50:18,213 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 204 [2021-11-20 22:50:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:18,214 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2021-11-20 22:50:18,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 22:50:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2021-11-20 22:50:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-20 22:50:18,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:18,218 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 13, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2021-11-20 22:50:18,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:18,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 22:50:18,443 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-11-20 22:50:18,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:18,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1020734655, now seen corresponding path program 3 times [2021-11-20 22:50:18,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:18,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137588969] [2021-11-20 22:50:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:18,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 64 proven. 144 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-11-20 22:50:18,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:18,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137588969] [2021-11-20 22:50:18,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137588969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:50:18,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628247416] [2021-11-20 22:50:18,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 22:50:18,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:18,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:18,547 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:18,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 22:50:18,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 22:50:18,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:50:18,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:50:18,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 64 proven. 144 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-11-20 22:50:18,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 64 proven. 144 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-11-20 22:50:19,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628247416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:50:19,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1182251416] [2021-11-20 22:50:19,701 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-20 22:50:19,702 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:50:19,702 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:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-20 22:50:19,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:50:19,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-11-20 22:50:19,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308199312] [2021-11-20 22:50:19,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:50:19,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 22:50:19,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 22:50:19,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:50:19,706 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 6 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-20 22:50:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:19,853 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2021-11-20 22:50:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 22:50:19,853 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 6 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 180 [2021-11-20 22:50:19,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:19,854 INFO L225 Difference]: With dead ends: 93 [2021-11-20 22:50:19,854 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 22:50:19,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 355 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-20 22:50:19,855 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:19,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 112 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:19,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 22:50:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 22:50:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 22:50:19,857 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 180 [2021-11-20 22:50:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:19,857 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 22:50:19,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 6 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-20 22:50:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 22:50:19,857 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 22:50:19,859 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2021-11-20 22:50:19,860 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2021-11-20 22:50:19,860 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2021-11-20 22:50:19,860 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2021-11-20 22:50:19,860 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2021-11-20 22:50:19,860 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2021-11-20 22:50:19,861 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2021-11-20 22:50:19,861 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2021-11-20 22:50:19,861 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2021-11-20 22:50:19,861 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2021-11-20 22:50:19,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:20,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:20,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-20 22:50:20,450 INFO L858 garLoopResultBuilder]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,451 INFO L858 garLoopResultBuilder]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2021-11-20 22:50:20,451 INFO L858 garLoopResultBuilder]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,451 INFO L858 garLoopResultBuilder]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2021-11-20 22:50:20,451 INFO L858 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,451 INFO L861 garLoopResultBuilder]: At program point rec1ENTRY(lines 11 15) the Hoare annotation is: true [2021-11-20 22:50:20,451 INFO L858 garLoopResultBuilder]: For program point L14-1(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,451 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-11-20 22:50:20,451 INFO L854 garLoopResultBuilder]: At program point L14-2(line 14) the Hoare annotation is: (and (not (<= |rec1_#in~i| 2147483646)) (or (not (<= |rec1_#in~i| 2147483647)) (and (<= rec1_~i 2147483647) (<= 1 rec1_~i)))) [2021-11-20 22:50:20,452 INFO L858 garLoopResultBuilder]: For program point L14-3(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,452 INFO L858 garLoopResultBuilder]: For program point L14-4(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,452 INFO L858 garLoopResultBuilder]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,452 INFO L858 garLoopResultBuilder]: For program point L14-5(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,452 INFO L854 garLoopResultBuilder]: At program point L14-6(line 14) the Hoare annotation is: (and (not (<= |rec1_#in~i| 2147483646)) (or (and (<= rec1_~i 2147483647) (<= |rec1_#t~ret0| 1) (<= 1 rec1_~i)) (not (<= |rec1_#in~i| 2147483647)))) [2021-11-20 22:50:20,453 INFO L858 garLoopResultBuilder]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,453 INFO L858 garLoopResultBuilder]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,454 INFO L858 garLoopResultBuilder]: For program point L14-7(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,454 INFO L858 garLoopResultBuilder]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,454 INFO L854 garLoopResultBuilder]: At program point L14-8(line 14) the Hoare annotation is: (and (or (and (<= |rec1_#t~ret1| 0) (<= rec1_~i 2147483647) (<= |rec1_#t~ret0| 1) (<= 1 rec1_~i)) (not (<= |rec1_#in~i| 2147483647))) (not (<= |rec1_#in~i| 2147483646))) [2021-11-20 22:50:20,454 INFO L858 garLoopResultBuilder]: For program point L14-9(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,455 INFO L858 garLoopResultBuilder]: For program point L14-10(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,455 INFO L858 garLoopResultBuilder]: For program point L14-11(line 14) no Hoare annotation was computed. [2021-11-20 22:50:20,455 INFO L858 garLoopResultBuilder]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-11-20 22:50:20,455 INFO L858 garLoopResultBuilder]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2021-11-20 22:50:20,455 INFO L858 garLoopResultBuilder]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2021-11-20 22:50:20,456 INFO L858 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2021-11-20 22:50:20,456 INFO L858 garLoopResultBuilder]: For program point L20-1(line 20) no Hoare annotation was computed. [2021-11-20 22:50:20,456 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 19) no Hoare annotation was computed. [2021-11-20 22:50:20,456 INFO L854 garLoopResultBuilder]: At program point L20-2(line 20) the Hoare annotation is: (and (not (<= |rec2_#in~j| 0)) (or (and (<= rec2_~j |rec2_#in~j|) (<= |rec2_#in~j| rec2_~j)) (not (<= |rec2_#in~j| 2147483647)))) [2021-11-20 22:50:20,456 INFO L858 garLoopResultBuilder]: For program point L20-3(line 20) no Hoare annotation was computed. [2021-11-20 22:50:20,456 INFO L854 garLoopResultBuilder]: At program point L20-4(line 20) the Hoare annotation is: (let ((.cse0 (<= rec2_~j |rec2_#in~j|)) (.cse1 (<= |rec2_#in~j| rec2_~j))) (or (not (<= |rec2_#in~j| 2147483647)) (and .cse0 .cse1 (<= |rec2_#t~ret3| 0) (<= 1 rec2_~j)) (and (<= 2 |rec2_#in~j|) (<= |rec2_#t~ret3| 1) .cse0 .cse1))) [2021-11-20 22:50:20,457 INFO L858 garLoopResultBuilder]: For program point L20-5(line 20) no Hoare annotation was computed. [2021-11-20 22:50:20,457 INFO L858 garLoopResultBuilder]: For program point L20-6(line 20) no Hoare annotation was computed. [2021-11-20 22:50:20,457 INFO L858 garLoopResultBuilder]: For program point L20-7(line 20) no Hoare annotation was computed. [2021-11-20 22:50:20,457 INFO L861 garLoopResultBuilder]: At program point rec2ENTRY(lines 17 21) the Hoare annotation is: true [2021-11-20 22:50:20,457 INFO L858 garLoopResultBuilder]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-11-20 22:50:20,457 INFO L858 garLoopResultBuilder]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-11-20 22:50:20,458 INFO L858 garLoopResultBuilder]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-11-20 22:50:20,458 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-20 22:50:20,458 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-20 22:50:20,458 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (<= |ULTIMATE.start_main_~x~0#1| 2147483647) [2021-11-20 22:50:20,458 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-11-20 22:50:20,461 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:20,463 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 22:50:20,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:50:20 BoogieIcfgContainer [2021-11-20 22:50:20,470 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 22:50:20,471 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 22:50:20,471 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 22:50:20,471 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 22:50:20,472 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:11" (3/4) ... [2021-11-20 22:50:20,475 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-20 22:50:20,482 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2021-11-20 22:50:20,482 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2021-11-20 22:50:20,489 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-11-20 22:50:20,490 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-20 22:50:20,490 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-20 22:50:20,531 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-20 22:50:20,531 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 22:50:20,533 INFO L158 Benchmark]: Toolchain (without parser) took 9974.19ms. Allocated memory was 88.1MB in the beginning and 132.1MB in the end (delta: 44.0MB). Free memory was 62.6MB in the beginning and 55.8MB in the end (delta: 6.8MB). Peak memory consumption was 49.5MB. Max. memory is 16.1GB. [2021-11-20 22:50:20,533 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 88.1MB. Free memory was 60.0MB in the beginning and 60.0MB in the end (delta: 40.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 22:50:20,534 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.79ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 62.5MB in the beginning and 80.0MB in the end (delta: -17.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 22:50:20,534 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.53ms. Allocated memory is still 109.1MB. Free memory was 80.0MB in the beginning and 78.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 22:50:20,535 INFO L158 Benchmark]: Boogie Preprocessor took 36.84ms. Allocated memory is still 109.1MB. Free memory was 78.7MB in the beginning and 77.8MB in the end (delta: 950.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 22:50:20,535 INFO L158 Benchmark]: RCFGBuilder took 370.20ms. Allocated memory is still 109.1MB. Free memory was 77.8MB in the beginning and 68.1MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 22:50:20,535 INFO L158 Benchmark]: TraceAbstraction took 9267.47ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 67.6MB in the beginning and 59.0MB in the end (delta: 8.7MB). Peak memory consumption was 34.4MB. Max. memory is 16.1GB. [2021-11-20 22:50:20,538 INFO L158 Benchmark]: Witness Printer took 60.44ms. Allocated memory is still 132.1MB. Free memory was 59.0MB in the beginning and 55.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 22:50:20,546 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 88.1MB. Free memory was 60.0MB in the beginning and 60.0MB in the end (delta: 40.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 202.79ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 62.5MB in the beginning and 80.0MB in the end (delta: -17.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.53ms. Allocated memory is still 109.1MB. Free memory was 80.0MB in the beginning and 78.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.84ms. Allocated memory is still 109.1MB. Free memory was 78.7MB in the beginning and 77.8MB in the end (delta: 950.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 370.20ms. Allocated memory is still 109.1MB. Free memory was 77.8MB in the beginning and 68.1MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 9267.47ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 67.6MB in the beginning and 59.0MB in the end (delta: 8.7MB). Peak memory consumption was 34.4MB. Max. memory is 16.1GB. * Witness Printer took 60.44ms. Allocated memory is still 132.1MB. Free memory was 59.0MB in the beginning and 55.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 42 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 9.2s, OverallIterations: 22, TraceHistogramMax: 20, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 366 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 335 mSDsluCounter, 2943 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2190 mSDsCounter, 115 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 913 IncrementalHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 115 mSolverCounterUnsat, 824 mSDtfsCounter, 913 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1258 GetRequests, 1102 SyntacticMatches, 5 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=165occurred in iteration=18, InterpolantAutomatonStates: 139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 22 MinimizatonAttempts, 94 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 238 PreInvPairs, 261 NumberOfFragments, 113 HoareAnnotationTreeSize, 238 FomulaSimplifications, 195 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 944 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 1828 NumberOfCodeBlocks, 1610 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 2144 ConstructedInterpolants, 0 QuantifiedInterpolants, 3066 SizeOfPredicates, 8 NumberOfNonLiveVariables, 1117 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 33 InterpolantComputations, 19 PerfectInterpolantSequences, 5553/6396 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 - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-20 22:50:20,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e173b6-f7c8-410c-8900-7c7590e64713/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE