./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/rec_counter1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/rec_counter1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs --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 de5b7f1cccf5c7fe435559014125bbfd73538586d5303d45f8d606cb31a4b74b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:29:27,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:29:27,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:29:27,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:29:27,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:29:27,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:29:27,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:29:27,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:29:27,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:29:27,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:29:27,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:29:27,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:29:27,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:29:27,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:29:27,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:29:27,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:29:27,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:29:27,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:29:27,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:29:27,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:29:27,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:29:27,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:29:27,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:29:27,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:29:27,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:29:27,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:29:27,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:29:27,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:29:27,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:29:27,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:29:27,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:29:27,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:29:27,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:29:27,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:29:27,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:29:27,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:29:27,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:29:27,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:29:27,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:29:27,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:29:27,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:29:27,925 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-19 14:29:27,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:29:27,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:29:27,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:29:27,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:29:27,952 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:29:27,953 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:29:27,953 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:29:27,953 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:29:27,953 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:29:27,953 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:29:27,954 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:29:27,954 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:29:27,954 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:29:27,954 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:29:27,954 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:29:27,955 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:29:27,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:29:27,956 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 14:29:27,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:29:27,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:29:27,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:29:27,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:29:27,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:29:27,957 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-19 14:29:27,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:29:27,957 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:29:27,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:29:27,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:29:27,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:29:27,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:29:27,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:29:27,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:29:27,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:29:27,959 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:29:27,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:29:27,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:29:27,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:29:27,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:29:27,960 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_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de5b7f1cccf5c7fe435559014125bbfd73538586d5303d45f8d606cb31a4b74b [2021-11-19 14:29:28,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:29:28,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:29:28,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:29:28,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:29:28,272 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:29:28,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/termination-numeric/rec_counter1.c [2021-11-19 14:29:28,352 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/data/5ef4e4b5f/bf6d439786dd45138b71a9e133d320c2/FLAG21acd0dcd [2021-11-19 14:29:28,852 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:29:28,852 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/sv-benchmarks/c/termination-numeric/rec_counter1.c [2021-11-19 14:29:28,858 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/data/5ef4e4b5f/bf6d439786dd45138b71a9e133d320c2/FLAG21acd0dcd [2021-11-19 14:29:29,228 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/data/5ef4e4b5f/bf6d439786dd45138b71a9e133d320c2 [2021-11-19 14:29:29,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:29:29,232 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:29:29,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:29,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:29:29,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:29:29,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:29" (1/1) ... [2021-11-19 14:29:29,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@666c78af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:29, skipping insertion in model container [2021-11-19 14:29:29,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:29:29" (1/1) ... [2021-11-19 14:29:29,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:29:29,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:29:29,458 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:29,462 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:29:29,513 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:29:29,528 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:29:29,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:29 WrapperNode [2021-11-19 14:29:29,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:29:29,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:29:29,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:29:29,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:29:29,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:29" (1/1) ... [2021-11-19 14:29:29,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:29" (1/1) ... [2021-11-19 14:29:29,569 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 12 [2021-11-19 14:29:29,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:29:29,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:29:29,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:29:29,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:29:29,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:29" (1/1) ... [2021-11-19 14:29:29,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:29" (1/1) ... [2021-11-19 14:29:29,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:29" (1/1) ... [2021-11-19 14:29:29,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:29" (1/1) ... [2021-11-19 14:29:29,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:29" (1/1) ... [2021-11-19 14:29:29,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:29" (1/1) ... [2021-11-19 14:29:29,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:29" (1/1) ... [2021-11-19 14:29:29,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:29:29,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:29:29,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:29:29,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:29:29,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:29" (1/1) ... [2021-11-19 14:29:29,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:29:29,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:29,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:29:29,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:29:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2021-11-19 14:29:29,719 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2021-11-19 14:29:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:29:29,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:29:29,777 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:29:29,779 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:29:29,939 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:29:29,954 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:29:29,954 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:29:29,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:29:29 BoogieIcfgContainer [2021-11-19 14:29:29,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:29:29,959 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:29:29,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:29:29,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:29:29,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:29:29" (1/3) ... [2021-11-19 14:29:29,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4808152e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:29:29, skipping insertion in model container [2021-11-19 14:29:29,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:29:29" (2/3) ... [2021-11-19 14:29:29,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4808152e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:29:29, skipping insertion in model container [2021-11-19 14:29:29,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:29:29" (3/3) ... [2021-11-19 14:29:29,967 INFO L111 eAbstractionObserver]: Analyzing ICFG rec_counter1.c [2021-11-19 14:29:29,973 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:29:29,973 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-19 14:29:30,025 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:29:30,033 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 [2021-11-19 14:29:30,034 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-19 14:29:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.6) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:29:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-19 14:29:30,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:30,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-19 14:29:30,058 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:30,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1967217591, now seen corresponding path program 1 times [2021-11-19 14:29:30,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:30,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500676322] [2021-11-19 14:29:30,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:30,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:30,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:30,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500676322] [2021-11-19 14:29:30,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500676322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:30,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:30,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:29:30,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122910870] [2021-11-19 14:29:30,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:30,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:29:30,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:30,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:29:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:29:30,320 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.6) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.25) 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) [2021-11-19 14:29:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:30,455 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-19 14:29:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:29:30,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) 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 [2021-11-19 14:29:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:30,466 INFO L225 Difference]: With dead ends: 25 [2021-11-19 14:29:30,466 INFO L226 Difference]: Without dead ends: 21 [2021-11-19 14:29:30,469 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 [2021-11-19 14:29:30,474 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:30,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 29 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:30,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-19 14:29:30,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-19 14:29:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:29:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-19 14:29:30,514 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2021-11-19 14:29:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:30,515 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-19 14:29:30,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) 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) [2021-11-19 14:29:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-19 14:29:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 14:29:30,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:30,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:30,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:29:30,517 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:30,522 INFO L85 PathProgramCache]: Analyzing trace with hash -854203139, now seen corresponding path program 1 times [2021-11-19 14:29:30,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:30,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035074568] [2021-11-19 14:29:30,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:30,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:30,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:30,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035074568] [2021-11-19 14:29:30,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035074568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:30,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:30,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:29:30,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830920202] [2021-11-19 14:29:30,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:30,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:29:30,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:30,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:29:30,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:29:30,622 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-19 14:29:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:30,682 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-19 14:29:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:29:30,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2021-11-19 14:29:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:30,684 INFO L225 Difference]: With dead ends: 41 [2021-11-19 14:29:30,684 INFO L226 Difference]: Without dead ends: 36 [2021-11-19 14:29:30,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:29:30,687 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:30,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 68 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:30,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-19 14:29:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-11-19 14:29:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:29:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-11-19 14:29:30,724 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 7 [2021-11-19 14:29:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:30,726 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-11-19 14:29:30,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-19 14:29:30,727 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-11-19 14:29:30,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 14:29:30,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:30,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:30,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:29:30,735 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:30,737 INFO L85 PathProgramCache]: Analyzing trace with hash -589186252, now seen corresponding path program 1 times [2021-11-19 14:29:30,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:30,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959621336] [2021-11-19 14:29:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:30,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:30,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:30,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959621336] [2021-11-19 14:29:30,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959621336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:30,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370037916] [2021-11-19 14:29:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:30,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:30,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:30,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:29:30,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:29:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:30,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:29:30,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:31,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:29:31,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370037916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:29:31,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [366172463] [2021-11-19 14:29:31,275 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-19 14:29:31,275 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:29:31,281 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) [2021-11-19 14:29:31,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:29:31,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-19 14:29:31,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087162784] [2021-11-19 14:29:31,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:29:31,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:29:31,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:31,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:29:31,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:29:31,295 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:31,434 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-11-19 14:29:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:29:31,439 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 14:29:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:31,443 INFO L225 Difference]: With dead ends: 38 [2021-11-19 14:29:31,444 INFO L226 Difference]: Without dead ends: 37 [2021-11-19 14:29:31,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:29:31,450 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 140 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:31,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 59 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:31,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-19 14:29:31,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2021-11-19 14:29:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.434782608695652) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 14:29:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-19 14:29:31,479 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 12 [2021-11-19 14:29:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:31,480 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-19 14:29:31,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:29:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-19 14:29:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 14:29:31,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:31,483 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:31,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 14:29:31,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:31,691 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1079336362, now seen corresponding path program 1 times [2021-11-19 14:29:31,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:31,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415607337] [2021-11-19 14:29:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:31,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:29:31,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:31,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415607337] [2021-11-19 14:29:31,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415607337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:31,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:31,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 14:29:31,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132471611] [2021-11-19 14:29:31,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:31,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:29:31,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:31,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:29:31,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:29:31,759 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:29:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:31,782 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-11-19 14:29:31,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:29:31,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-19 14:29:31,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:31,784 INFO L225 Difference]: With dead ends: 55 [2021-11-19 14:29:31,785 INFO L226 Difference]: Without dead ends: 37 [2021-11-19 14:29:31,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:29:31,787 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:31,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-19 14:29:31,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-19 14:29:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:29:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-11-19 14:29:31,798 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 15 [2021-11-19 14:29:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:31,799 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-11-19 14:29:31,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:29:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-11-19 14:29:31,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 14:29:31,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:31,801 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:31,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 14:29:31,802 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:31,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:31,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1079337361, now seen corresponding path program 1 times [2021-11-19 14:29:31,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:31,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954772950] [2021-11-19 14:29:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:31,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:29:31,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:31,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954772950] [2021-11-19 14:29:31,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954772950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:31,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:31,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:29:31,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010110307] [2021-11-19 14:29:31,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:31,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:29:31,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:31,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:29:31,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:29:31,856 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:29:31,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:31,897 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-11-19 14:29:31,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:29:31,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-19 14:29:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:31,901 INFO L225 Difference]: With dead ends: 53 [2021-11-19 14:29:31,903 INFO L226 Difference]: Without dead ends: 52 [2021-11-19 14:29:31,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:29:31,911 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:31,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 47 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:31,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-19 14:29:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2021-11-19 14:29:31,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.375) internal successors, (44), 34 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 14:29:31,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-11-19 14:29:31,931 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 15 [2021-11-19 14:29:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:31,931 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-11-19 14:29:31,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:29:31,932 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-11-19 14:29:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 14:29:31,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:31,933 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:31,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 14:29:31,934 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:31,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:31,934 INFO L85 PathProgramCache]: Analyzing trace with hash -900280117, now seen corresponding path program 1 times [2021-11-19 14:29:31,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:31,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184139878] [2021-11-19 14:29:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:31,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 14:29:31,971 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:31,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184139878] [2021-11-19 14:29:31,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184139878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:31,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:31,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 14:29:31,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649231799] [2021-11-19 14:29:31,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:31,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:29:31,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:31,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:29:31,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:31,973 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:29:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:31,989 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-11-19 14:29:31,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:29:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-19 14:29:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:31,991 INFO L225 Difference]: With dead ends: 41 [2021-11-19 14:29:31,991 INFO L226 Difference]: Without dead ends: 36 [2021-11-19 14:29:31,991 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 [2021-11-19 14:29:31,992 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 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 [2021-11-19 14:29:31,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-19 14:29:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-19 14:29:31,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 14:29:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-11-19 14:29:31,999 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 16 [2021-11-19 14:29:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:32,000 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-11-19 14:29:32,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:29:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-11-19 14:29:32,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 14:29:32,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:32,001 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:32,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 14:29:32,002 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:32,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:32,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1389552199, now seen corresponding path program 1 times [2021-11-19 14:29:32,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:32,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127438448] [2021-11-19 14:29:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:32,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:29:32,142 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:32,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127438448] [2021-11-19 14:29:32,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127438448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:32,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500113216] [2021-11-19 14:29:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:32,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:32,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:32,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:29:32,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:29:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:32,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:29:32,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:29:32,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:29:32,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500113216] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:32,518 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:29:32,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8] total 18 [2021-11-19 14:29:32,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301834300] [2021-11-19 14:29:32,519 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:32,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:29:32,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:32,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:29:32,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:29:32,521 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:29:32,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:32,627 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-11-19 14:29:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:29:32,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-11-19 14:29:32,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:32,631 INFO L225 Difference]: With dead ends: 36 [2021-11-19 14:29:32,632 INFO L226 Difference]: Without dead ends: 35 [2021-11-19 14:29:32,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-11-19 14:29:32,634 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:32,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 65 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-19 14:29:32,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-19 14:29:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 14:29:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-11-19 14:29:32,656 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2021-11-19 14:29:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:32,657 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-11-19 14:29:32,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:29:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-11-19 14:29:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 14:29:32,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:32,659 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:32,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:32,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:32,880 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting recErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:32,881 INFO L85 PathProgramCache]: Analyzing trace with hash 126445262, now seen corresponding path program 1 times [2021-11-19 14:29:32,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:32,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374379085] [2021-11-19 14:29:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:32,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:29:32,936 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:32,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374379085] [2021-11-19 14:29:32,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374379085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:32,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:32,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 14:29:32,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40638733] [2021-11-19 14:29:32,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:32,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:29:32,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:32,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:29:32,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:29:32,939 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:29:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:32,968 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-11-19 14:29:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:29:32,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-19 14:29:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:32,970 INFO L225 Difference]: With dead ends: 35 [2021-11-19 14:29:32,970 INFO L226 Difference]: Without dead ends: 34 [2021-11-19 14:29:32,971 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 [2021-11-19 14:29:32,972 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 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 [2021-11-19 14:29:32,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:29:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-19 14:29:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-19 14:29:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 14:29:32,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-19 14:29:32,978 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 27 [2021-11-19 14:29:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:32,979 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-19 14:29:32,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 14:29:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-19 14:29:32,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 14:29:32,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:32,981 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:29:32,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 14:29:32,981 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:32,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1254815063, now seen corresponding path program 1 times [2021-11-19 14:29:32,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:32,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968051432] [2021-11-19 14:29:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:32,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:29:33,095 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:33,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968051432] [2021-11-19 14:29:33,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968051432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:33,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473910027] [2021-11-19 14:29:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:33,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:33,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:33,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:29:33,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 14:29:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:33,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:29:33,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:29:33,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:29:33,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473910027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:29:33,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152695661] [2021-11-19 14:29:33,365 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:29:33,365 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:29:33,366 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) [2021-11-19 14:29:33,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:29:33,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2021-11-19 14:29:33,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567261747] [2021-11-19 14:29:33,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:29:33,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:29:33,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:33,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:29:33,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:29:33,370 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:29:33,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:33,525 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-11-19 14:29:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 14:29:33,526 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-11-19 14:29:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:33,528 INFO L225 Difference]: With dead ends: 73 [2021-11-19 14:29:33,529 INFO L226 Difference]: Without dead ends: 58 [2021-11-19 14:29:33,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:29:33,531 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:33,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 113 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:33,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-19 14:29:33,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-11-19 14:29:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:29:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-11-19 14:29:33,550 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 29 [2021-11-19 14:29:33,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:33,550 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-11-19 14:29:33,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 14:29:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-11-19 14:29:33,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 14:29:33,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:33,554 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-19 14:29:33,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:33,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:33,767 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:33,767 INFO L85 PathProgramCache]: Analyzing trace with hash 532392663, now seen corresponding path program 2 times [2021-11-19 14:29:33,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:33,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778296962] [2021-11-19 14:29:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:33,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 14:29:33,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:33,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778296962] [2021-11-19 14:29:33,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778296962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:33,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795462767] [2021-11-19 14:29:33,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:29:33,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:33,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:33,897 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:29:33,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:29:33,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 14:29:33,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:29:33,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:29:33,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 14:29:34,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-19 14:29:34,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795462767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:29:34,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1528551177] [2021-11-19 14:29:34,353 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:29:34,353 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:29:34,354 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) [2021-11-19 14:29:34,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:29:34,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 21 [2021-11-19 14:29:34,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748684933] [2021-11-19 14:29:34,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:29:34,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 14:29:34,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:34,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 14:29:34,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:29:34,359 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 14:29:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:34,735 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2021-11-19 14:29:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 14:29:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 57 [2021-11-19 14:29:34,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:34,737 INFO L225 Difference]: With dead ends: 119 [2021-11-19 14:29:34,737 INFO L226 Difference]: Without dead ends: 83 [2021-11-19 14:29:34,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 14:29:34,739 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:34,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 179 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:34,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-19 14:29:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2021-11-19 14:29:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:29:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-11-19 14:29:34,749 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 57 [2021-11-19 14:29:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:34,750 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-11-19 14:29:34,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 14:29:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-11-19 14:29:34,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 14:29:34,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:34,754 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2021-11-19 14:29:34,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:34,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 14:29:34,973 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:34,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:34,973 INFO L85 PathProgramCache]: Analyzing trace with hash -938496574, now seen corresponding path program 3 times [2021-11-19 14:29:34,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:34,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611867218] [2021-11-19 14:29:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:34,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-19 14:29:35,140 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:35,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611867218] [2021-11-19 14:29:35,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611867218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:35,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519990478] [2021-11-19 14:29:35,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:29:35,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:35,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:35,142 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:29:35,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 14:29:35,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:29:35,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:29:35,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:29:35,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-19 14:29:35,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-19 14:29:35,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519990478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:29:35,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638327770] [2021-11-19 14:29:35,877 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:29:35,878 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:29:35,878 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) [2021-11-19 14:29:35,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:29:35,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 28 [2021-11-19 14:29:35,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129349364] [2021-11-19 14:29:35,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:29:35,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 14:29:35,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:35,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 14:29:35,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-11-19 14:29:35,882 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 25 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 14:29:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:36,429 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-11-19 14:29:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 14:29:36,429 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 25 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 76 [2021-11-19 14:29:36,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:36,431 INFO L225 Difference]: With dead ends: 124 [2021-11-19 14:29:36,431 INFO L226 Difference]: Without dead ends: 110 [2021-11-19 14:29:36,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=729, Invalid=2133, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 14:29:36,434 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 147 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:36,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 147 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-19 14:29:36,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2021-11-19 14:29:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 97 states have (on average 1.134020618556701) internal successors, (110), 97 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-19 14:29:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2021-11-19 14:29:36,446 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 76 [2021-11-19 14:29:36,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:36,447 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2021-11-19 14:29:36,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 25 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 14:29:36,447 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2021-11-19 14:29:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 14:29:36,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:36,450 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 7, 7, 7, 7, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2021-11-19 14:29:36,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:36,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 14:29:36,675 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash 737716276, now seen corresponding path program 4 times [2021-11-19 14:29:36,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:36,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442005904] [2021-11-19 14:29:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:36,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-19 14:29:36,875 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:36,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442005904] [2021-11-19 14:29:36,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442005904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:36,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313168374] [2021-11-19 14:29:36,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:29:36,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:36,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:36,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:29:36,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 14:29:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:36,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 14:29:36,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 12 proven. 255 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-19 14:29:37,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 12 proven. 255 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-19 14:29:38,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313168374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:29:38,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [526836056] [2021-11-19 14:29:38,203 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:29:38,203 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:29:38,204 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) [2021-11-19 14:29:38,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:29:38,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 31 [2021-11-19 14:29:38,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320011122] [2021-11-19 14:29:38,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:29:38,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 14:29:38,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 14:29:38,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-11-19 14:29:38,210 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 32 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 23 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 14:29:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:38,656 INFO L93 Difference]: Finished difference Result 459 states and 528 transitions. [2021-11-19 14:29:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-19 14:29:38,656 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 23 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 108 [2021-11-19 14:29:38,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:38,660 INFO L225 Difference]: With dead ends: 459 [2021-11-19 14:29:38,660 INFO L226 Difference]: Without dead ends: 338 [2021-11-19 14:29:38,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=553, Invalid=2203, Unknown=0, NotChecked=0, Total=2756 [2021-11-19 14:29:38,665 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 111 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:38,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 146 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:38,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-19 14:29:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 166. [2021-11-19 14:29:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 152 states have (on average 1.118421052631579) internal successors, (170), 152 states have internal predecessors, (170), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 11 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 14:29:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 184 transitions. [2021-11-19 14:29:38,685 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 184 transitions. Word has length 108 [2021-11-19 14:29:38,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:38,686 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 184 transitions. [2021-11-19 14:29:38,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 23 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 14:29:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 184 transitions. [2021-11-19 14:29:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-19 14:29:38,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:38,689 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2021-11-19 14:29:38,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:38,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:38,906 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:38,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash 193886619, now seen corresponding path program 5 times [2021-11-19 14:29:38,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:38,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525507528] [2021-11-19 14:29:38,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:38,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1495 backedges. 791 proven. 26 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2021-11-19 14:29:39,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:39,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525507528] [2021-11-19 14:29:39,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525507528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:39,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794454315] [2021-11-19 14:29:39,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:29:39,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:39,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:39,139 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:29:39,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 14:29:39,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 14:29:39,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:29:39,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:29:39,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1495 backedges. 617 proven. 162 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-11-19 14:29:39,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1495 backedges. 617 proven. 162 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-11-19 14:29:40,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794454315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:29:40,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [29428407] [2021-11-19 14:29:40,774 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:29:40,774 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:29:40,775 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) [2021-11-19 14:29:40,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:29:40,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2021-11-19 14:29:40,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072724964] [2021-11-19 14:29:40,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:29:40,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 14:29:40,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:40,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 14:29:40,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 14:29:40,780 INFO L87 Difference]: Start difference. First operand 166 states and 184 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 32 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-19 14:29:42,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:42,967 INFO L93 Difference]: Finished difference Result 737 states and 853 transitions. [2021-11-19 14:29:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-19 14:29:42,968 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 32 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) Word has length 183 [2021-11-19 14:29:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:42,973 INFO L225 Difference]: With dead ends: 737 [2021-11-19 14:29:42,973 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 14:29:42,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1764, Invalid=9366, Unknown=0, NotChecked=0, Total=11130 [2021-11-19 14:29:42,983 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 412 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:42,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 286 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:29:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 14:29:43,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 204. [2021-11-19 14:29:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 189 states have (on average 1.1111111111111112) internal successors, (210), 189 states have internal predecessors, (210), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:29:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 225 transitions. [2021-11-19 14:29:43,042 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 225 transitions. Word has length 183 [2021-11-19 14:29:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:43,044 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 225 transitions. [2021-11-19 14:29:43,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 32 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-19 14:29:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 225 transitions. [2021-11-19 14:29:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-19 14:29:43,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:43,052 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2021-11-19 14:29:43,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:43,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 14:29:43,279 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:43,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:43,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1061120542, now seen corresponding path program 6 times [2021-11-19 14:29:43,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:43,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532077030] [2021-11-19 14:29:43,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:43,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 1308 proven. 53 refuted. 0 times theorem prover too weak. 953 trivial. 0 not checked. [2021-11-19 14:29:43,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:43,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532077030] [2021-11-19 14:29:43,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532077030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:43,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103191773] [2021-11-19 14:29:43,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:29:43,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:43,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:43,590 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:29:43,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 14:29:43,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:29:43,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:29:43,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 14:29:43,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 1018 proven. 92 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2021-11-19 14:29:44,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 1026 proven. 84 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2021-11-19 14:29:45,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103191773] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:29:45,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715790775] [2021-11-19 14:29:45,711 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:29:45,712 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:29:45,712 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) [2021-11-19 14:29:45,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:29:45,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 24 [2021-11-19 14:29:45,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36143089] [2021-11-19 14:29:45,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:29:45,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 14:29:45,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:45,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 14:29:45,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:29:45,716 INFO L87 Difference]: Start difference. First operand 204 states and 225 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 21 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 14:29:46,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:46,332 INFO L93 Difference]: Finished difference Result 408 states and 453 transitions. [2021-11-19 14:29:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 14:29:46,333 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 21 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 210 [2021-11-19 14:29:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:46,335 INFO L225 Difference]: With dead ends: 408 [2021-11-19 14:29:46,335 INFO L226 Difference]: Without dead ends: 253 [2021-11-19 14:29:46,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 411 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=401, Invalid=1761, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 14:29:46,338 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:46,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 289 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:29:46,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-19 14:29:46,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 239. [2021-11-19 14:29:46,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 222 states have (on average 1.09009009009009) internal successors, (242), 222 states have internal predecessors, (242), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 14 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:29:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 259 transitions. [2021-11-19 14:29:46,360 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 259 transitions. Word has length 210 [2021-11-19 14:29:46,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:46,361 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 259 transitions. [2021-11-19 14:29:46,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 21 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 14:29:46,361 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 259 transitions. [2021-11-19 14:29:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-19 14:29:46,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:46,365 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2021-11-19 14:29:46,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:46,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:46,582 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:46,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:46,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1997384363, now seen corresponding path program 7 times [2021-11-19 14:29:46,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:46,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708581583] [2021-11-19 14:29:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:46,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 1570 proven. 255 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2021-11-19 14:29:46,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:46,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708581583] [2021-11-19 14:29:46,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708581583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:46,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745480022] [2021-11-19 14:29:46,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:29:46,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:46,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:46,990 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:29:47,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 14:29:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:47,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 14:29:47,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 1415 proven. 185 refuted. 0 times theorem prover too weak. 1041 trivial. 0 not checked. [2021-11-19 14:29:47,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 1428 proven. 172 refuted. 0 times theorem prover too weak. 1041 trivial. 0 not checked. [2021-11-19 14:29:49,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745480022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:29:49,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188951329] [2021-11-19 14:29:49,774 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:29:49,774 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:29:49,775 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) [2021-11-19 14:29:49,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:29:49,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 36 [2021-11-19 14:29:49,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499493776] [2021-11-19 14:29:49,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:29:49,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-19 14:29:49,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-19 14:29:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 14:29:49,780 INFO L87 Difference]: Start difference. First operand 239 states and 259 transitions. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 31 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-19 14:29:51,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:51,351 INFO L93 Difference]: Finished difference Result 561 states and 612 transitions. [2021-11-19 14:29:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-19 14:29:51,352 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 31 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) Word has length 219 [2021-11-19 14:29:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:51,356 INFO L225 Difference]: With dead ends: 561 [2021-11-19 14:29:51,356 INFO L226 Difference]: Without dead ends: 394 [2021-11-19 14:29:51,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 426 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1137, Invalid=5669, Unknown=0, NotChecked=0, Total=6806 [2021-11-19 14:29:51,363 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:51,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 399 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:29:51,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-19 14:29:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 364. [2021-11-19 14:29:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 341 states have (on average 1.064516129032258) internal successors, (363), 341 states have internal predecessors, (363), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 20 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:29:51,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 386 transitions. [2021-11-19 14:29:51,399 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 386 transitions. Word has length 219 [2021-11-19 14:29:51,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:51,399 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 386 transitions. [2021-11-19 14:29:51,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 31 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-19 14:29:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 386 transitions. [2021-11-19 14:29:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-19 14:29:51,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:51,405 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 13, 12, 12, 12, 12, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2021-11-19 14:29:51,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:51,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 14:29:51,631 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:51,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1299852982, now seen corresponding path program 8 times [2021-11-19 14:29:51,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:51,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154152091] [2021-11-19 14:29:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:51,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 1818 proven. 188 refuted. 0 times theorem prover too weak. 1349 trivial. 0 not checked. [2021-11-19 14:29:52,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:52,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154152091] [2021-11-19 14:29:52,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154152091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:52,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157011104] [2021-11-19 14:29:52,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:29:52,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:52,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:52,042 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:29:52,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 14:29:52,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 14:29:52,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:29:52,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:29:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 1278 proven. 192 refuted. 0 times theorem prover too weak. 1885 trivial. 0 not checked. [2021-11-19 14:29:52,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 1278 proven. 192 refuted. 0 times theorem prover too weak. 1885 trivial. 0 not checked. [2021-11-19 14:29:54,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157011104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:29:54,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [804777553] [2021-11-19 14:29:54,167 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:29:54,167 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:29:54,167 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) [2021-11-19 14:29:54,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:29:54,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 18, 18] total 63 [2021-11-19 14:29:54,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141921400] [2021-11-19 14:29:54,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:29:54,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-19 14:29:54,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:29:54,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-19 14:29:54,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=3469, Unknown=0, NotChecked=0, Total=3906 [2021-11-19 14:29:54,179 INFO L87 Difference]: Start difference. First operand 364 states and 386 transitions. Second operand has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 60 states have internal predecessors, (125), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 14:29:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:58,140 INFO L93 Difference]: Finished difference Result 1645 states and 1845 transitions. [2021-11-19 14:29:58,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-19 14:29:58,141 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 60 states have internal predecessors, (125), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 244 [2021-11-19 14:29:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:58,149 INFO L225 Difference]: With dead ends: 1645 [2021-11-19 14:29:58,150 INFO L226 Difference]: Without dead ends: 1405 [2021-11-19 14:29:58,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7209 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3827, Invalid=23233, Unknown=0, NotChecked=0, Total=27060 [2021-11-19 14:29:58,165 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 754 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:58,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 453 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:29:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-11-19 14:29:58,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 546. [2021-11-19 14:29:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 518 states have (on average 1.0810810810810811) internal successors, (560), 518 states have internal predecessors, (560), 3 states have call successors, (3), 2 states have call predecessors, (3), 24 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 14:29:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 588 transitions. [2021-11-19 14:29:58,230 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 588 transitions. Word has length 244 [2021-11-19 14:29:58,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:58,230 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 588 transitions. [2021-11-19 14:29:58,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 60 states have internal predecessors, (125), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 14:29:58,231 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 588 transitions. [2021-11-19 14:29:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-19 14:29:58,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:58,237 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 13, 12, 12, 12, 12, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2021-11-19 14:29:58,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:58,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 14:29:58,463 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:29:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:58,463 INFO L85 PathProgramCache]: Analyzing trace with hash -325348062, now seen corresponding path program 9 times [2021-11-19 14:29:58,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:29:58,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315328522] [2021-11-19 14:29:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:58,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:29:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5448 backedges. 2294 proven. 2126 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2021-11-19 14:29:59,186 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:29:59,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315328522] [2021-11-19 14:29:59,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315328522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:29:59,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56957051] [2021-11-19 14:29:59,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:29:59,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:29:59,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:29:59,193 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:29:59,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 14:29:59,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:29:59,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:29:59,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-19 14:29:59,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5448 backedges. 2318 proven. 2102 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2021-11-19 14:30:00,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5448 backedges. 2318 proven. 2102 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2021-11-19 14:30:03,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56957051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:30:03,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1725646721] [2021-11-19 14:30:03,758 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:30:03,758 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:30:03,759 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) [2021-11-19 14:30:03,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:30:03,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 47 [2021-11-19 14:30:03,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793176710] [2021-11-19 14:30:03,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:30:03,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-19 14:30:03,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:30:03,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-19 14:30:03,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1905, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 14:30:03,762 INFO L87 Difference]: Start difference. First operand 546 states and 588 transitions. Second operand has 47 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 38 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 14:30:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:05,526 INFO L93 Difference]: Finished difference Result 782 states and 845 transitions. [2021-11-19 14:30:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-19 14:30:05,527 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 38 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 286 [2021-11-19 14:30:05,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:05,530 INFO L225 Difference]: With dead ends: 782 [2021-11-19 14:30:05,530 INFO L226 Difference]: Without dead ends: 307 [2021-11-19 14:30:05,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4903 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2821, Invalid=13435, Unknown=0, NotChecked=0, Total=16256 [2021-11-19 14:30:05,534 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 331 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:05,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 232 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:30:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-19 14:30:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-11-19 14:30:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 292 states have (on average 1.0616438356164384) internal successors, (310), 292 states have internal predecessors, (310), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:30:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 325 transitions. [2021-11-19 14:30:05,566 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 325 transitions. Word has length 286 [2021-11-19 14:30:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:05,567 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 325 transitions. [2021-11-19 14:30:05,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 38 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 14:30:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 325 transitions. [2021-11-19 14:30:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-19 14:30:05,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:05,573 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-11-19 14:30:05,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:05,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 14:30:05,787 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:30:05,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:05,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1454758772, now seen corresponding path program 10 times [2021-11-19 14:30:05,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:30:05,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215738361] [2021-11-19 14:30:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:05,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:30:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6778 backedges. 4500 proven. 750 refuted. 0 times theorem prover too weak. 1528 trivial. 0 not checked. [2021-11-19 14:30:06,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:30:06,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215738361] [2021-11-19 14:30:06,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215738361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:06,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835454177] [2021-11-19 14:30:06,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:30:06,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:30:06,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:30:06,387 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:30:06,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 14:30:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:06,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 14:30:06,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6778 backedges. 4472 proven. 776 refuted. 0 times theorem prover too weak. 1530 trivial. 0 not checked. [2021-11-19 14:30:07,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6778 backedges. 4506 proven. 742 refuted. 0 times theorem prover too weak. 1530 trivial. 0 not checked. [2021-11-19 14:30:10,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835454177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:30:10,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [782527729] [2021-11-19 14:30:10,332 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:30:10,332 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:30:10,333 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) [2021-11-19 14:30:10,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:30:10,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 39, 39] total 45 [2021-11-19 14:30:10,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617984782] [2021-11-19 14:30:10,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:30:10,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-19 14:30:10,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:30:10,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-19 14:30:10,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 14:30:10,336 INFO L87 Difference]: Start difference. First operand 307 states and 325 transitions. Second operand has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 36 states have internal predecessors, (111), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 14:30:11,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:11,509 INFO L93 Difference]: Finished difference Result 441 states and 475 transitions. [2021-11-19 14:30:11,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-19 14:30:11,510 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 36 states have internal predecessors, (111), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 308 [2021-11-19 14:30:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:11,515 INFO L225 Difference]: With dead ends: 441 [2021-11-19 14:30:11,515 INFO L226 Difference]: Without dead ends: 307 [2021-11-19 14:30:11,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 614 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3873 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2159, Invalid=10723, Unknown=0, NotChecked=0, Total=12882 [2021-11-19 14:30:11,520 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:11,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 310 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:30:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-19 14:30:11,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-11-19 14:30:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 292 states have (on average 1.0513698630136987) internal successors, (307), 292 states have internal predecessors, (307), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-19 14:30:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 322 transitions. [2021-11-19 14:30:11,555 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 322 transitions. Word has length 308 [2021-11-19 14:30:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:11,556 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 322 transitions. [2021-11-19 14:30:11,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 36 states have internal predecessors, (111), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-19 14:30:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 322 transitions. [2021-11-19 14:30:11,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-19 14:30:11,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:11,563 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 14, 13, 13, 13, 13, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-11-19 14:30:11,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:11,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 14:30:11,779 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:30:11,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:11,779 INFO L85 PathProgramCache]: Analyzing trace with hash 991097137, now seen corresponding path program 11 times [2021-11-19 14:30:11,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:30:11,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707464146] [2021-11-19 14:30:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:11,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:30:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7091 backedges. 2694 proven. 3267 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2021-11-19 14:30:12,587 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:30:12,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707464146] [2021-11-19 14:30:12,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707464146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:12,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454846181] [2021-11-19 14:30:12,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:30:12,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:30:12,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:30:12,589 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:30:12,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 14:30:12,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-19 14:30:12,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:30:12,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 14:30:12,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7091 backedges. 3330 proven. 1301 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2021-11-19 14:30:13,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7091 backedges. 3330 proven. 1301 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2021-11-19 14:30:15,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454846181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:30:15,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [993939372] [2021-11-19 14:30:15,996 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:30:15,996 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:30:15,996 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) [2021-11-19 14:30:15,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:30:15,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 25, 25] total 95 [2021-11-19 14:30:15,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823714421] [2021-11-19 14:30:15,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:30:16,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-19 14:30:16,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:30:16,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-19 14:30:16,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=7938, Unknown=0, NotChecked=0, Total=8930 [2021-11-19 14:30:16,005 INFO L87 Difference]: Start difference. First operand 307 states and 322 transitions. Second operand has 95 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 82 states have internal predecessors, (207), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 14:30:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:24,111 INFO L93 Difference]: Finished difference Result 788 states and 873 transitions. [2021-11-19 14:30:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2021-11-19 14:30:24,111 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 82 states have internal predecessors, (207), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) Word has length 321 [2021-11-19 14:30:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:24,115 INFO L225 Difference]: With dead ends: 788 [2021-11-19 14:30:24,116 INFO L226 Difference]: Without dead ends: 545 [2021-11-19 14:30:24,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37108 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=20809, Invalid=75601, Unknown=0, NotChecked=0, Total=96410 [2021-11-19 14:30:24,128 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1209 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:24,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1209 Valid, 269 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:30:24,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-19 14:30:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 466. [2021-11-19 14:30:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 448 states have (on average 1.0803571428571428) internal successors, (484), 448 states have internal predecessors, (484), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 15 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:30:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 502 transitions. [2021-11-19 14:30:24,227 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 502 transitions. Word has length 321 [2021-11-19 14:30:24,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:24,228 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 502 transitions. [2021-11-19 14:30:24,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 82 states have internal predecessors, (207), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 14:30:24,229 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 502 transitions. [2021-11-19 14:30:24,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2021-11-19 14:30:24,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:24,242 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 15, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2021-11-19 14:30:24,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:24,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:30:24,459 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:30:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:24,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1111831063, now seen corresponding path program 12 times [2021-11-19 14:30:24,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:30:24,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597681280] [2021-11-19 14:30:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:24,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:30:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18866 backedges. 12502 proven. 1477 refuted. 0 times theorem prover too weak. 4887 trivial. 0 not checked. [2021-11-19 14:30:25,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:30:25,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597681280] [2021-11-19 14:30:25,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597681280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:25,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429455895] [2021-11-19 14:30:25,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:30:25,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:30:25,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:30:25,570 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:30:25,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 14:30:25,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:30:25,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:30:25,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-19 14:30:25,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18866 backedges. 12457 proven. 1520 refuted. 0 times theorem prover too weak. 4889 trivial. 0 not checked. [2021-11-19 14:30:26,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18866 backedges. 12510 proven. 1467 refuted. 0 times theorem prover too weak. 4889 trivial. 0 not checked. [2021-11-19 14:30:33,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429455895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:30:33,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2079931346] [2021-11-19 14:30:33,505 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:30:33,505 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:30:33,505 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) [2021-11-19 14:30:33,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:30:33,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 49, 49] total 55 [2021-11-19 14:30:33,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048515552] [2021-11-19 14:30:33,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:30:33,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-19 14:30:33,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:30:33,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-19 14:30:33,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=2617, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 14:30:33,512 INFO L87 Difference]: Start difference. First operand 466 states and 502 transitions. Second operand has 55 states, 55 states have (on average 2.418181818181818) internal successors, (133), 44 states have internal predecessors, (133), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:30:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:35,567 INFO L93 Difference]: Finished difference Result 762 states and 834 transitions. [2021-11-19 14:30:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-11-19 14:30:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.418181818181818) internal successors, (133), 44 states have internal predecessors, (133), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 473 [2021-11-19 14:30:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:35,587 INFO L225 Difference]: With dead ends: 762 [2021-11-19 14:30:35,587 INFO L226 Difference]: Without dead ends: 469 [2021-11-19 14:30:35,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1104 GetRequests, 944 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8137 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4277, Invalid=21163, Unknown=0, NotChecked=0, Total=25440 [2021-11-19 14:30:35,595 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 77 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:35,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 418 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:30:35,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-19 14:30:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 469. [2021-11-19 14:30:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 451 states have (on average 1.0620842572062084) internal successors, (479), 451 states have internal predecessors, (479), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 15 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 14:30:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 497 transitions. [2021-11-19 14:30:35,644 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 497 transitions. Word has length 473 [2021-11-19 14:30:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:35,645 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 497 transitions. [2021-11-19 14:30:35,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.418181818181818) internal successors, (133), 44 states have internal predecessors, (133), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:30:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 497 transitions. [2021-11-19 14:30:35,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-11-19 14:30:35,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:35,653 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 17, 16, 16, 16, 16, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2021-11-19 14:30:35,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:30:35,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:30:35,867 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:30:35,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:35,867 INFO L85 PathProgramCache]: Analyzing trace with hash -742799454, now seen corresponding path program 13 times [2021-11-19 14:30:35,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:30:35,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498933403] [2021-11-19 14:30:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:35,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:30:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 19344 backedges. 8859 proven. 6875 refuted. 0 times theorem prover too weak. 3610 trivial. 0 not checked. [2021-11-19 14:30:37,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:30:37,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498933403] [2021-11-19 14:30:37,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498933403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:37,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065406718] [2021-11-19 14:30:37,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:30:37,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:30:37,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:30:37,124 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:30:37,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 14:30:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:37,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 14:30:37,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 19344 backedges. 8892 proven. 6842 refuted. 0 times theorem prover too weak. 3610 trivial. 0 not checked. [2021-11-19 14:30:38,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19344 backedges. 8892 proven. 6842 refuted. 0 times theorem prover too weak. 3610 trivial. 0 not checked. [2021-11-19 14:30:47,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065406718] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:30:47,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695634414] [2021-11-19 14:30:47,432 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:30:47,432 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:30:47,433 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) [2021-11-19 14:30:47,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:30:47,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 62 [2021-11-19 14:30:47,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70686010] [2021-11-19 14:30:47,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:30:47,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-19 14:30:47,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:30:47,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-19 14:30:47,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3351, Unknown=0, NotChecked=0, Total=3782 [2021-11-19 14:30:47,437 INFO L87 Difference]: Start difference. First operand 469 states and 497 transitions. Second operand has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 50 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 14:30:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:50,843 INFO L93 Difference]: Finished difference Result 738 states and 795 transitions. [2021-11-19 14:30:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-11-19 14:30:50,844 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 50 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) Word has length 486 [2021-11-19 14:30:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:50,848 INFO L225 Difference]: With dead ends: 738 [2021-11-19 14:30:50,848 INFO L226 Difference]: Without dead ends: 508 [2021-11-19 14:30:50,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1185 GetRequests, 981 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14962 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7611, Invalid=34619, Unknown=0, NotChecked=0, Total=42230 [2021-11-19 14:30:50,853 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 447 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:50,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 193 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 14:30:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-19 14:30:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2021-11-19 14:30:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 489 states have (on average 1.0572597137014315) internal successors, (517), 489 states have internal predecessors, (517), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 16 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:30:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 536 transitions. [2021-11-19 14:30:50,903 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 536 transitions. Word has length 486 [2021-11-19 14:30:50,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:50,904 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 536 transitions. [2021-11-19 14:30:50,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 50 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 14:30:50,905 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 536 transitions. [2021-11-19 14:30:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-11-19 14:30:50,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:50,910 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2021-11-19 14:30:50,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-19 14:30:51,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-19 14:30:51,111 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:30:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:51,112 INFO L85 PathProgramCache]: Analyzing trace with hash -2049396699, now seen corresponding path program 14 times [2021-11-19 14:30:51,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:30:51,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594473180] [2021-11-19 14:30:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:51,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:30:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 22921 backedges. 15846 proven. 1971 refuted. 0 times theorem prover too weak. 5104 trivial. 0 not checked. [2021-11-19 14:30:52,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:30:52,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594473180] [2021-11-19 14:30:52,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594473180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:30:52,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234597637] [2021-11-19 14:30:52,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:30:52,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:30:52,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:30:52,296 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:30:52,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 14:30:52,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-19 14:30:52,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:30:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 14:30:52,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:30:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 22921 backedges. 11185 proven. 4483 refuted. 0 times theorem prover too weak. 7253 trivial. 0 not checked. [2021-11-19 14:30:54,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:30:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 22921 backedges. 11185 proven. 4483 refuted. 0 times theorem prover too weak. 7253 trivial. 0 not checked. [2021-11-19 14:30:57,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234597637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:30:57,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [125850188] [2021-11-19 14:30:57,875 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:30:57,875 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:30:57,876 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) [2021-11-19 14:30:57,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:30:57,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 32, 32] total 120 [2021-11-19 14:30:57,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237496982] [2021-11-19 14:30:57,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:30:57,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-11-19 14:30:57,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:30:57,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-11-19 14:30:57,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=13051, Unknown=0, NotChecked=0, Total=14280 [2021-11-19 14:30:57,882 INFO L87 Difference]: Start difference. First operand 508 states and 536 transitions. Second operand has 120 states, 120 states have (on average 2.1416666666666666) internal successors, (257), 102 states have internal predecessors, (257), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-19 14:31:14,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:14,842 INFO L93 Difference]: Finished difference Result 1444 states and 1609 transitions. [2021-11-19 14:31:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 412 states. [2021-11-19 14:31:14,843 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.1416666666666666) internal successors, (257), 102 states have internal predecessors, (257), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) Word has length 517 [2021-11-19 14:31:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:14,850 INFO L225 Difference]: With dead ends: 1444 [2021-11-19 14:31:14,850 INFO L226 Difference]: Without dead ends: 1018 [2021-11-19 14:31:14,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1498 GetRequests, 972 SyntacticMatches, 0 SemanticMatches, 526 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110371 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=42663, Invalid=235593, Unknown=0, NotChecked=0, Total=278256 [2021-11-19 14:31:14,873 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1670 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:14,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1670 Valid, 781 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2375 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:31:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-11-19 14:31:14,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 703. [2021-11-19 14:31:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 681 states have (on average 1.0719530102790014) internal successors, (730), 681 states have internal predecessors, (730), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 19 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:31:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 752 transitions. [2021-11-19 14:31:14,950 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 752 transitions. Word has length 517 [2021-11-19 14:31:14,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:14,951 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 752 transitions. [2021-11-19 14:31:14,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.1416666666666666) internal successors, (257), 102 states have internal predecessors, (257), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-19 14:31:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 752 transitions. [2021-11-19 14:31:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2021-11-19 14:31:14,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:14,960 INFO L514 BasicCegarLoop]: trace histogram [172, 172, 172, 21, 20, 20, 20, 20, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2021-11-19 14:31:15,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:15,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:31:15,175 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:31:15,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:15,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1109689662, now seen corresponding path program 15 times [2021-11-19 14:31:15,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:31:15,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703231423] [2021-11-19 14:31:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:15,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:31:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 49105 backedges. 29029 proven. 593 refuted. 0 times theorem prover too weak. 19483 trivial. 0 not checked. [2021-11-19 14:31:16,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:31:16,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703231423] [2021-11-19 14:31:16,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703231423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:16,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771546808] [2021-11-19 14:31:16,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:31:16,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:31:16,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:31:16,611 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:31:16,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 14:31:17,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:31:17,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:31:17,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 14:31:17,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 49105 backedges. 30824 proven. 2628 refuted. 0 times theorem prover too weak. 15653 trivial. 0 not checked. [2021-11-19 14:31:19,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49105 backedges. 30900 proven. 2552 refuted. 0 times theorem prover too weak. 15653 trivial. 0 not checked. [2021-11-19 14:31:33,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771546808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:31:33,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1536767235] [2021-11-19 14:31:33,443 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:31:33,443 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:31:33,443 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) [2021-11-19 14:31:33,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:31:33,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 59, 59] total 80 [2021-11-19 14:31:33,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105030737] [2021-11-19 14:31:33,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:31:33,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-19 14:31:33,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:31:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-19 14:31:33,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=5755, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 14:31:33,448 INFO L87 Difference]: Start difference. First operand 703 states and 752 transitions. Second operand has 80 states, 80 states have (on average 2.25) internal successors, (180), 69 states have internal predecessors, (180), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:31:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:40,911 INFO L93 Difference]: Finished difference Result 1092 states and 1190 transitions. [2021-11-19 14:31:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-11-19 14:31:40,911 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.25) internal successors, (180), 69 states have internal predecessors, (180), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 728 [2021-11-19 14:31:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:40,916 INFO L225 Difference]: With dead ends: 1092 [2021-11-19 14:31:40,916 INFO L226 Difference]: Without dead ends: 709 [2021-11-19 14:31:40,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1679 GetRequests, 1423 SyntacticMatches, 3 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18981 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9239, Invalid=55531, Unknown=0, NotChecked=0, Total=64770 [2021-11-19 14:31:40,926 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 116 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 7617 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 7630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 7617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:40,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1004 Invalid, 7630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 7617 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 14:31:40,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-11-19 14:31:40,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 709. [2021-11-19 14:31:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 687 states have (on average 1.0655021834061136) internal successors, (732), 687 states have internal predecessors, (732), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 19 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:31:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 754 transitions. [2021-11-19 14:31:41,003 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 754 transitions. Word has length 728 [2021-11-19 14:31:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:41,004 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 754 transitions. [2021-11-19 14:31:41,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.25) internal successors, (180), 69 states have internal predecessors, (180), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:31:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 754 transitions. [2021-11-19 14:31:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2021-11-19 14:31:41,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:41,013 INFO L514 BasicCegarLoop]: trace histogram [174, 174, 174, 21, 20, 20, 20, 20, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2021-11-19 14:31:41,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:41,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:31:41,227 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:31:41,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:41,227 INFO L85 PathProgramCache]: Analyzing trace with hash 704257006, now seen corresponding path program 16 times [2021-11-19 14:31:41,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:31:41,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420425796] [2021-11-19 14:31:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:41,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:31:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 50176 backedges. 34151 proven. 3265 refuted. 0 times theorem prover too weak. 12760 trivial. 0 not checked. [2021-11-19 14:31:42,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:31:42,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420425796] [2021-11-19 14:31:42,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420425796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:31:42,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957520320] [2021-11-19 14:31:42,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:31:42,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:31:42,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:31:42,916 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:31:42,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 14:31:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:43,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-19 14:31:43,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 50176 backedges. 34073 proven. 3341 refuted. 0 times theorem prover too weak. 12762 trivial. 0 not checked. [2021-11-19 14:31:44,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 50176 backedges. 34162 proven. 3252 refuted. 0 times theorem prover too weak. 12762 trivial. 0 not checked. [2021-11-19 14:32:00,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957520320] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:32:00,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1442058903] [2021-11-19 14:32:00,975 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:32:00,975 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:32:00,976 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) [2021-11-19 14:32:00,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:32:00,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 64, 64] total 70 [2021-11-19 14:32:00,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280740082] [2021-11-19 14:32:00,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:32:00,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-19 14:32:00,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:32:00,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-19 14:32:00,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=4276, Unknown=0, NotChecked=0, Total=4830 [2021-11-19 14:32:00,983 INFO L87 Difference]: Start difference. First operand 709 states and 754 transitions. Second operand has 70 states, 70 states have (on average 2.3714285714285714) internal successors, (166), 56 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 14:32:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:04,840 INFO L93 Difference]: Finished difference Result 1056 states and 1144 transitions. [2021-11-19 14:32:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-11-19 14:32:04,841 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.3714285714285714) internal successors, (166), 56 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 734 [2021-11-19 14:32:04,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:04,845 INFO L225 Difference]: With dead ends: 1056 [2021-11-19 14:32:04,846 INFO L226 Difference]: Without dead ends: 712 [2021-11-19 14:32:04,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1710 GetRequests, 1466 SyntacticMatches, 2 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20323 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10219, Invalid=49073, Unknown=0, NotChecked=0, Total=59292 [2021-11-19 14:32:04,853 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 101 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:04,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 602 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:32:04,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-11-19 14:32:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2021-11-19 14:32:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 690 states have (on average 1.0594202898550724) internal successors, (731), 690 states have internal predecessors, (731), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 19 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 14:32:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 753 transitions. [2021-11-19 14:32:04,929 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 753 transitions. Word has length 734 [2021-11-19 14:32:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:04,930 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 753 transitions. [2021-11-19 14:32:04,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.3714285714285714) internal successors, (166), 56 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 14:32:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 753 transitions. [2021-11-19 14:32:04,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2021-11-19 14:32:04,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:04,939 INFO L514 BasicCegarLoop]: trace histogram [175, 175, 175, 19, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2021-11-19 14:32:04,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:05,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:32:05,155 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:32:05,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:05,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1641030089, now seen corresponding path program 17 times [2021-11-19 14:32:05,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:32:05,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985341630] [2021-11-19 14:32:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:05,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:32:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 50527 backedges. 23980 proven. 17087 refuted. 0 times theorem prover too weak. 9460 trivial. 0 not checked. [2021-11-19 14:32:06,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:32:06,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985341630] [2021-11-19 14:32:06,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985341630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:32:06,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679524933] [2021-11-19 14:32:06,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:32:06,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:32:06,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:32:06,866 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:32:06,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 14:32:07,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-11-19 14:32:07,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:32:07,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-19 14:32:07,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 50527 backedges. 24699 proven. 11893 refuted. 0 times theorem prover too weak. 13935 trivial. 0 not checked. [2021-11-19 14:32:10,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 50527 backedges. 24699 proven. 11893 refuted. 0 times theorem prover too weak. 13935 trivial. 0 not checked. [2021-11-19 14:32:16,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679524933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:32:16,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1215513796] [2021-11-19 14:32:16,563 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:32:16,563 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:32:16,563 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) [2021-11-19 14:32:16,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:32:16,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 41, 41] total 152 [2021-11-19 14:32:16,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226748786] [2021-11-19 14:32:16,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:32:16,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2021-11-19 14:32:16,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:32:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-11-19 14:32:16,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2428, Invalid=20524, Unknown=0, NotChecked=0, Total=22952 [2021-11-19 14:32:16,571 INFO L87 Difference]: Start difference. First operand 712 states and 753 transitions. Second operand has 152 states, 152 states have (on average 2.1315789473684212) internal successors, (324), 130 states have internal predecessors, (324), 1 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (24), 24 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-19 14:32:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:52,269 INFO L93 Difference]: Finished difference Result 2622 states and 2932 transitions. [2021-11-19 14:32:52,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 634 states. [2021-11-19 14:32:52,270 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.1315789473684212) internal successors, (324), 130 states have internal predecessors, (324), 1 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (24), 24 states have call predecessors, (24), 1 states have call successors, (24) Word has length 727 [2021-11-19 14:32:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:52,280 INFO L225 Difference]: With dead ends: 2622 [2021-11-19 14:32:52,281 INFO L226 Difference]: Without dead ends: 1893 [2021-11-19 14:32:52,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2101 GetRequests, 1377 SyntacticMatches, 0 SemanticMatches, 724 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245093 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=120699, Invalid=405651, Unknown=0, NotChecked=0, Total=526350 [2021-11-19 14:32:52,323 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 3859 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 1585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3859 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1585 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:52,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3859 Valid, 307 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1585 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:32:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-11-19 14:32:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1081. [2021-11-19 14:32:52,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1054 states have (on average 1.0806451612903225) internal successors, (1139), 1054 states have internal predecessors, (1139), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 24 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:32:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1166 transitions. [2021-11-19 14:32:52,460 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1166 transitions. Word has length 727 [2021-11-19 14:32:52,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:52,461 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1166 transitions. [2021-11-19 14:32:52,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.1315789473684212) internal successors, (324), 130 states have internal predecessors, (324), 1 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (24), 24 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-19 14:32:52,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1166 transitions. [2021-11-19 14:32:52,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1114 [2021-11-19 14:32:52,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:52,477 INFO L514 BasicCegarLoop]: trace histogram [282, 282, 282, 26, 25, 25, 25, 25, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2021-11-19 14:32:52,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:52,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-19 14:32:52,703 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:32:52,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:52,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1904585625, now seen corresponding path program 18 times [2021-11-19 14:32:52,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:32:52,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789504184] [2021-11-19 14:32:52,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:52,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:32:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 128395 backedges. 74291 proven. 944 refuted. 0 times theorem prover too weak. 53160 trivial. 0 not checked. [2021-11-19 14:32:54,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:32:54,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789504184] [2021-11-19 14:32:54,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789504184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:32:54,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155298798] [2021-11-19 14:32:54,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:32:54,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:32:54,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:32:54,648 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:32:54,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 14:32:55,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:32:55,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:32:55,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 2533 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-19 14:32:55,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 128395 backedges. 21548 proven. 1080 refuted. 0 times theorem prover too weak. 105767 trivial. 0 not checked. [2021-11-19 14:32:59,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 128395 backedges. 21548 proven. 1080 refuted. 0 times theorem prover too weak. 105767 trivial. 0 not checked. [2021-11-19 14:33:05,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155298798] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:05,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [652154069] [2021-11-19 14:33:05,211 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:33:05,212 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:33:05,212 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) [2021-11-19 14:33:05,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:33:05,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 57, 57] total 173 [2021-11-19 14:33:05,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947447418] [2021-11-19 14:33:05,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:33:05,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2021-11-19 14:33:05,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:33:05,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2021-11-19 14:33:05,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4015, Invalid=25741, Unknown=0, NotChecked=0, Total=29756 [2021-11-19 14:33:05,219 INFO L87 Difference]: Start difference. First operand 1081 states and 1166 transitions. Second operand has 173 states, 173 states have (on average 1.6358381502890174) internal successors, (283), 172 states have internal predecessors, (283), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:33:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:15,216 INFO L93 Difference]: Finished difference Result 2850 states and 3313 transitions. [2021-11-19 14:33:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-11-19 14:33:15,217 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 1.6358381502890174) internal successors, (283), 172 states have internal predecessors, (283), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 1113 [2021-11-19 14:33:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:15,229 INFO L225 Difference]: With dead ends: 2850 [2021-11-19 14:33:15,229 INFO L226 Difference]: Without dead ends: 2135 [2021-11-19 14:33:15,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2470 GetRequests, 2115 SyntacticMatches, 0 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34663 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=21834, Invalid=105258, Unknown=0, NotChecked=0, Total=127092 [2021-11-19 14:33:15,247 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 2186 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 3150 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2186 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 3510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 3150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:15,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2186 Valid, 843 Invalid, 3510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 3150 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 14:33:15,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-11-19 14:33:15,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1258. [2021-11-19 14:33:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1231 states have (on average 1.0812347684809098) internal successors, (1331), 1231 states have internal predecessors, (1331), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 24 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:33:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1358 transitions. [2021-11-19 14:33:15,466 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1358 transitions. Word has length 1113 [2021-11-19 14:33:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:15,468 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 1358 transitions. [2021-11-19 14:33:15,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 1.6358381502890174) internal successors, (283), 172 states have internal predecessors, (283), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 14:33:15,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1358 transitions. [2021-11-19 14:33:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1207 [2021-11-19 14:33:15,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:15,487 INFO L514 BasicCegarLoop]: trace histogram [313, 313, 313, 26, 25, 25, 25, 25, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2021-11-19 14:33:15,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:15,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-19 14:33:15,711 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:33:15,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:15,711 INFO L85 PathProgramCache]: Analyzing trace with hash -986258540, now seen corresponding path program 19 times [2021-11-19 14:33:15,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:33:15,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929142587] [2021-11-19 14:33:15,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:15,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:33:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 156729 backedges. 89503 proven. 1079 refuted. 0 times theorem prover too weak. 66147 trivial. 0 not checked. [2021-11-19 14:33:18,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:33:18,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929142587] [2021-11-19 14:33:18,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929142587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:33:18,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410268520] [2021-11-19 14:33:18,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:33:18,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:33:18,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:33:18,281 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:33:18,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 14:33:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:19,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-19 14:33:19,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 156729 backedges. 98730 proven. 6224 refuted. 0 times theorem prover too weak. 51775 trivial. 0 not checked. [2021-11-19 14:33:22,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 156729 backedges. 98864 proven. 6090 refuted. 0 times theorem prover too weak. 51775 trivial. 0 not checked. [2021-11-19 14:33:58,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410268520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:33:58,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337348204] [2021-11-19 14:33:58,504 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:33:58,504 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:33:58,504 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) [2021-11-19 14:33:58,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:33:58,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 79, 79] total 108 [2021-11-19 14:33:58,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529147651] [2021-11-19 14:33:58,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:33:58,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-19 14:33:58,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:33:58,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-19 14:33:58,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=979, Invalid=10577, Unknown=0, NotChecked=0, Total=11556 [2021-11-19 14:33:58,511 INFO L87 Difference]: Start difference. First operand 1258 states and 1358 transitions. Second operand has 108 states, 108 states have (on average 2.185185185185185) internal successors, (236), 93 states have internal predecessors, (236), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-19 14:34:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:13,982 INFO L93 Difference]: Finished difference Result 2154 states and 2355 transitions. [2021-11-19 14:34:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 317 states. [2021-11-19 14:34:13,983 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.185185185185185) internal successors, (236), 93 states have internal predecessors, (236), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) Word has length 1206 [2021-11-19 14:34:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:13,989 INFO L225 Difference]: With dead ends: 2154 [2021-11-19 14:34:13,989 INFO L226 Difference]: Without dead ends: 1264 [2021-11-19 14:34:14,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2775 GetRequests, 2367 SyntacticMatches, 3 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50942 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=22844, Invalid=142398, Unknown=0, NotChecked=0, Total=165242 [2021-11-19 14:34:14,012 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 168 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 10514 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 10531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 10514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:14,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1018 Invalid, 10531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 10514 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-19 14:34:14,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-11-19 14:34:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1264. [2021-11-19 14:34:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1237 states have (on average 1.0759902991107517) internal successors, (1331), 1237 states have internal predecessors, (1331), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 24 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:34:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1358 transitions. [2021-11-19 14:34:14,260 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1358 transitions. Word has length 1206 [2021-11-19 14:34:14,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:14,261 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1358 transitions. [2021-11-19 14:34:14,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.185185185185185) internal successors, (236), 93 states have internal predecessors, (236), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-19 14:34:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1358 transitions. [2021-11-19 14:34:14,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1203 [2021-11-19 14:34:14,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:14,280 INFO L514 BasicCegarLoop]: trace histogram [315, 315, 315, 24, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2021-11-19 14:34:14,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:14,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-19 14:34:14,495 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:34:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:14,495 INFO L85 PathProgramCache]: Analyzing trace with hash -842205688, now seen corresponding path program 20 times [2021-11-19 14:34:14,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:34:14,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067478861] [2021-11-19 14:34:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:14,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:34:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 158417 backedges. 107112 proven. 7329 refuted. 0 times theorem prover too weak. 43976 trivial. 0 not checked. [2021-11-19 14:34:17,682 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:34:17,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067478861] [2021-11-19 14:34:17,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067478861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:34:17,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424411893] [2021-11-19 14:34:17,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:34:17,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:34:17,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:34:17,683 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:34:17,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 14:34:19,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-19 14:34:19,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:34:19,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-19 14:34:19,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 158417 backedges. 77450 proven. 40107 refuted. 0 times theorem prover too weak. 40860 trivial. 0 not checked. [2021-11-19 14:34:23,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 158417 backedges. 77450 proven. 40107 refuted. 0 times theorem prover too weak. 40860 trivial. 0 not checked. [2021-11-19 14:34:35,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424411893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:34:35,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1902720552] [2021-11-19 14:34:35,301 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:34:35,301 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:34:35,302 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) [2021-11-19 14:34:35,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:34:35,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 50, 50] total 186 [2021-11-19 14:34:35,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192713682] [2021-11-19 14:34:35,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:34:35,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2021-11-19 14:34:35,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:34:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2021-11-19 14:34:35,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2800, Invalid=31610, Unknown=0, NotChecked=0, Total=34410 [2021-11-19 14:34:35,309 INFO L87 Difference]: Start difference. First operand 1264 states and 1358 transitions. Second operand has 186 states, 186 states have (on average 2.1021505376344085) internal successors, (391), 158 states have internal predecessors, (391), 1 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (30), 30 states have call predecessors, (30), 1 states have call successors, (30) [2021-11-19 14:35:45,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:45,841 INFO L93 Difference]: Finished difference Result 5439 states and 6101 transitions. [2021-11-19 14:35:45,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 983 states. [2021-11-19 14:35:45,842 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 186 states have (on average 2.1021505376344085) internal successors, (391), 158 states have internal predecessors, (391), 1 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (30), 30 states have call predecessors, (30), 1 states have call successors, (30) Word has length 1202 [2021-11-19 14:35:45,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:45,861 INFO L225 Difference]: With dead ends: 5439 [2021-11-19 14:35:45,861 INFO L226 Difference]: Without dead ends: 3910 [2021-11-19 14:35:45,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3469 GetRequests, 2306 SyntacticMatches, 0 SemanticMatches, 1163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599377 ImplicationChecksByTransitivity, 71.7s TimeCoverageRelationStatistics Valid=203979, Invalid=1152081, Unknown=0, NotChecked=0, Total=1356060 [2021-11-19 14:35:45,969 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 4613 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 4800 mSolverCounterSat, 1431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4613 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 6231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1431 IncrementalHoareTripleChecker+Valid, 4800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:45,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4613 Valid, 1267 Invalid, 6231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1431 Valid, 4800 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 14:35:45,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2021-11-19 14:35:46,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 1732. [2021-11-19 14:35:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1699 states have (on average 1.0806356680400235) internal successors, (1836), 1699 states have internal predecessors, (1836), 3 states have call successors, (3), 2 states have call predecessors, (3), 29 states have return successors, (30), 30 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-19 14:35:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 1869 transitions. [2021-11-19 14:35:46,353 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 1869 transitions. Word has length 1202 [2021-11-19 14:35:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:46,354 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 1869 transitions. [2021-11-19 14:35:46,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 186 states have (on average 2.1021505376344085) internal successors, (391), 158 states have internal predecessors, (391), 1 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (30), 30 states have call predecessors, (30), 1 states have call successors, (30) [2021-11-19 14:35:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 1869 transitions. [2021-11-19 14:35:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1521 [2021-11-19 14:35:46,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:46,393 INFO L514 BasicCegarLoop]: trace histogram [410, 410, 410, 27, 26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2021-11-19 14:35:46,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-19 14:35:46,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-19 14:35:46,607 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:35:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:46,607 INFO L85 PathProgramCache]: Analyzing trace with hash 50650946, now seen corresponding path program 21 times [2021-11-19 14:35:46,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:35:46,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671886978] [2021-11-19 14:35:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:46,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:35:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 265797 backedges. 111525 proven. 22230 refuted. 0 times theorem prover too weak. 132042 trivial. 0 not checked. [2021-11-19 14:35:49,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:35:49,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671886978] [2021-11-19 14:35:49,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671886978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:35:49,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523981261] [2021-11-19 14:35:49,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:35:49,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:35:49,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:35:49,877 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:35:49,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 14:35:51,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:35:51,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:35:51,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 3480 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-19 14:35:51,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 265797 backedges. 111570 proven. 22185 refuted. 0 times theorem prover too weak. 132042 trivial. 0 not checked. [2021-11-19 14:35:54,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 265797 backedges. 111570 proven. 22185 refuted. 0 times theorem prover too weak. 132042 trivial. 0 not checked. [2021-11-19 14:36:42,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523981261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:36:42,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2034358391] [2021-11-19 14:36:42,082 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:36:42,083 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:36:42,083 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) [2021-11-19 14:36:42,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:36:42,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 82 [2021-11-19 14:36:42,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351895854] [2021-11-19 14:36:42,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:36:42,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-19 14:36:42,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:36:42,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-19 14:36:42,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=5909, Unknown=0, NotChecked=0, Total=6642 [2021-11-19 14:36:42,088 INFO L87 Difference]: Start difference. First operand 1732 states and 1869 transitions. Second operand has 82 states, 82 states have (on average 2.2804878048780486) internal successors, (187), 66 states have internal predecessors, (187), 1 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (18), 18 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-19 14:36:49,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:49,966 INFO L93 Difference]: Finished difference Result 2937 states and 3206 transitions. [2021-11-19 14:36:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 292 states. [2021-11-19 14:36:49,967 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.2804878048780486) internal successors, (187), 66 states have internal predecessors, (187), 1 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (18), 18 states have call predecessors, (18), 1 states have call successors, (18) Word has length 1520 [2021-11-19 14:36:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:49,975 INFO L225 Difference]: With dead ends: 2937 [2021-11-19 14:36:49,975 INFO L226 Difference]: Without dead ends: 1672 [2021-11-19 14:36:49,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3389 GetRequests, 3053 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46686 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=21511, Invalid=92395, Unknown=0, NotChecked=0, Total=113906 [2021-11-19 14:36:49,993 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 674 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:49,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 245 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:36:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-11-19 14:36:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1672. [2021-11-19 14:36:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1640 states have (on average 1.0810975609756097) internal successors, (1773), 1640 states have internal predecessors, (1773), 3 states have call successors, (3), 2 states have call predecessors, (3), 28 states have return successors, (29), 29 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-19 14:36:50,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 1805 transitions. [2021-11-19 14:36:50,273 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 1805 transitions. Word has length 1520 [2021-11-19 14:36:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:50,274 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 1805 transitions. [2021-11-19 14:36:50,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.2804878048780486) internal successors, (187), 66 states have internal predecessors, (187), 1 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (18), 18 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-19 14:36:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 1805 transitions. [2021-11-19 14:36:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1577 [2021-11-19 14:36:50,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:50,300 INFO L514 BasicCegarLoop]: trace histogram [425, 425, 425, 28, 27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2021-11-19 14:36:50,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:50,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-19 14:36:50,515 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:36:50,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:50,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1503242060, now seen corresponding path program 22 times [2021-11-19 14:36:50,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:36:50,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388609444] [2021-11-19 14:36:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:50,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:36:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 285664 backedges. 125577 proven. 28460 refuted. 0 times theorem prover too weak. 131627 trivial. 0 not checked. [2021-11-19 14:36:53,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:36:53,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388609444] [2021-11-19 14:36:53,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388609444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:36:53,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968672855] [2021-11-19 14:36:53,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 14:36:53,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:36:53,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:36:53,333 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:36:53,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 14:36:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:55,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 3608 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-19 14:36:55,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 285664 backedges. 125625 proven. 28412 refuted. 0 times theorem prover too weak. 131627 trivial. 0 not checked. [2021-11-19 14:36:58,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 285664 backedges. 125625 proven. 28412 refuted. 0 times theorem prover too weak. 131627 trivial. 0 not checked. [2021-11-19 14:37:54,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968672855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:37:54,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [784732966] [2021-11-19 14:37:54,712 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:37:54,712 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:37:54,712 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) [2021-11-19 14:37:54,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:37:54,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 87 [2021-11-19 14:37:54,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993442828] [2021-11-19 14:37:54,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:37:54,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-19 14:37:54,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:37:54,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-19 14:37:54,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=6661, Unknown=0, NotChecked=0, Total=7482 [2021-11-19 14:37:54,717 INFO L87 Difference]: Start difference. First operand 1672 states and 1805 transitions. Second operand has 87 states, 87 states have (on average 2.2758620689655173) internal successors, (198), 70 states have internal predecessors, (198), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-19 14:38:04,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:38:04,114 INFO L93 Difference]: Finished difference Result 2769 states and 3033 transitions. [2021-11-19 14:38:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 327 states. [2021-11-19 14:38:04,115 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.2758620689655173) internal successors, (198), 70 states have internal predecessors, (198), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) Word has length 1576 [2021-11-19 14:38:04,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:38:04,120 INFO L225 Difference]: With dead ends: 2769 [2021-11-19 14:38:04,120 INFO L226 Difference]: Without dead ends: 1672 [2021-11-19 14:38:04,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3540 GetRequests, 3166 SyntacticMatches, 0 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59447 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=26901, Invalid=114099, Unknown=0, NotChecked=0, Total=141000 [2021-11-19 14:38:04,133 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 836 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:38:04,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 240 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:38:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-11-19 14:38:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1672. [2021-11-19 14:38:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1640 states have (on average 1.0804878048780489) internal successors, (1772), 1640 states have internal predecessors, (1772), 3 states have call successors, (3), 2 states have call predecessors, (3), 28 states have return successors, (29), 29 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-19 14:38:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 1804 transitions. [2021-11-19 14:38:04,372 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 1804 transitions. Word has length 1576 [2021-11-19 14:38:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:38:04,374 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 1804 transitions. [2021-11-19 14:38:04,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.2758620689655173) internal successors, (198), 70 states have internal predecessors, (198), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-19 14:38:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 1804 transitions. [2021-11-19 14:38:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1646 [2021-11-19 14:38:04,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:04,398 INFO L514 BasicCegarLoop]: trace histogram [441, 441, 441, 31, 30, 30, 30, 30, 28, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1] [2021-11-19 14:38:04,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:04,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:38:04,607 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:38:04,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:04,607 INFO L85 PathProgramCache]: Analyzing trace with hash -835888489, now seen corresponding path program 23 times [2021-11-19 14:38:04,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:38:04,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232747099] [2021-11-19 14:38:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:04,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:38:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 307884 backedges. 173474 proven. 1376 refuted. 0 times theorem prover too weak. 133034 trivial. 0 not checked. [2021-11-19 14:38:07,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:38:07,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232747099] [2021-11-19 14:38:07,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232747099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:38:07,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702711948] [2021-11-19 14:38:07,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:38:07,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:38:07,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:38:07,168 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:38:07,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 14:38:10,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-11-19 14:38:10,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:38:10,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1957 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 14:38:10,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 307884 backedges. 152265 proven. 73064 refuted. 0 times theorem prover too weak. 82555 trivial. 0 not checked. [2021-11-19 14:38:14,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 307884 backedges. 152265 proven. 73064 refuted. 0 times theorem prover too weak. 82555 trivial. 0 not checked. [2021-11-19 14:38:30,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702711948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:38:30,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [173398690] [2021-11-19 14:38:30,814 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-19 14:38:30,814 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:38:30,815 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) [2021-11-19 14:38:30,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:38:30,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 55, 55] total 181 [2021-11-19 14:38:30,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607612112] [2021-11-19 14:38:30,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:38:30,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 181 states [2021-11-19 14:38:30,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:38:30,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2021-11-19 14:38:30,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2922, Invalid=29658, Unknown=0, NotChecked=0, Total=32580 [2021-11-19 14:38:30,822 INFO L87 Difference]: Start difference. First operand 1672 states and 1804 transitions. Second operand has 181 states, 181 states have (on average 1.861878453038674) internal successors, (337), 168 states have internal predecessors, (337), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 14:39:25,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:25,903 INFO L93 Difference]: Finished difference Result 6486 states and 7263 transitions. [2021-11-19 14:39:25,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 826 states. [2021-11-19 14:39:25,903 INFO L78 Accepts]: Start accepts. Automaton has has 181 states, 181 states have (on average 1.861878453038674) internal successors, (337), 168 states have internal predecessors, (337), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) Word has length 1645 [2021-11-19 14:39:25,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:25,917 INFO L225 Difference]: With dead ends: 6486 [2021-11-19 14:39:25,917 INFO L226 Difference]: Without dead ends: 4441 [2021-11-19 14:39:25,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4183 GetRequests, 3183 SyntacticMatches, 0 SemanticMatches, 1000 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389390 ImplicationChecksByTransitivity, 56.4s TimeCoverageRelationStatistics Valid=88884, Invalid=914118, Unknown=0, NotChecked=0, Total=1003002 [2021-11-19 14:39:25,969 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 8318 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 4828 mSolverCounterSat, 2345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8318 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 7173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2345 IncrementalHoareTripleChecker+Valid, 4828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:25,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8318 Valid, 1392 Invalid, 7173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2345 Valid, 4828 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 14:39:25,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4441 states. [2021-11-19 14:39:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4441 to 1945. [2021-11-19 14:39:26,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1910 states have (on average 1.081675392670157) internal successors, (2066), 1910 states have internal predecessors, (2066), 3 states have call successors, (3), 2 states have call predecessors, (3), 31 states have return successors, (32), 32 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-19 14:39:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 2101 transitions. [2021-11-19 14:39:26,280 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 2101 transitions. Word has length 1645 [2021-11-19 14:39:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:26,281 INFO L470 AbstractCegarLoop]: Abstraction has 1945 states and 2101 transitions. [2021-11-19 14:39:26,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 181 states, 181 states have (on average 1.861878453038674) internal successors, (337), 168 states have internal predecessors, (337), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 14:39:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 2101 transitions. [2021-11-19 14:39:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1862 [2021-11-19 14:39:26,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:26,316 INFO L514 BasicCegarLoop]: trace histogram [509, 509, 509, 31, 30, 30, 30, 30, 30, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1] [2021-11-19 14:39:26,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:26,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:39:26,543 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-19 14:39:26,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:26,543 INFO L85 PathProgramCache]: Analyzing trace with hash -952480141, now seen corresponding path program 24 times [2021-11-19 14:39:26,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:39:26,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409462708] [2021-11-19 14:39:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:26,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:39:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 407944 backedges. 173362 proven. 35921 refuted. 0 times theorem prover too weak. 198661 trivial. 0 not checked. [2021-11-19 14:39:29,834 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:39:29,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409462708] [2021-11-19 14:39:29,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409462708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:39:29,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739869749] [2021-11-19 14:39:29,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 14:39:29,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:39:29,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:39:29,835 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:39:29,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24fb16f6-2d6e-4e1c-8d5a-65496eae9407/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 14:39:33,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 14:39:33,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:39:33,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 4265 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-19 14:39:33,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 407944 backedges. 173413 proven. 35870 refuted. 0 times theorem prover too weak. 198661 trivial. 0 not checked. [2021-11-19 14:39:35,684 INFO L328 TraceCheckSpWp]: Computing backward predicates...